2022 |
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101. | Albeht Rodríguez-Vega; Juan Carlos Antuña-Marrero; David Barriopedro; Ricardo García-Herrera; Victoria E. Cachorro Revilla; Ángel Frutos Baraja; Juan Carlos Antuña-Sánchez Climatology of aerosols over the Caribbean islands: aerosol types, synoptic patterns and transport Journal Article In: Journal of Applied Meteorology and Climatology, 2022. @article{ClimatologyofaerosolsovertheCaribbeanislandsaerosoltypessynopticpatternsandtransport, |
102. | Juan Carlos Antuña Sánchez Universidad de Valladolid, 2022, (dirección: Roberto Román, Ángel M. de Frutos y Victoria E. Cachorro.). Abstract | Links | BibTeX | Tags: all-sky camera, atmospheric aerosols, sky radiance @phdthesis{Sánchez2021, Atmospheric aerosols, solid or liquid particles floating in the atmosphere, play an important role in the Earth's climate, since they scatter and absorb part of the solar radiation reaching the Earth. The aerosol properties are usually obtained by measuring the diffuse solar radiation incoming in different directions (sky radiance), which is partially formed by the scattering of aerosols. The sky radiance is usually measured with photometers. A cheaper alternative to these photometers are the all-sky cameras, which capture images of the whole sky. In this doctoral thesis we propose the use of all-sky cameras to retrieve atmospheric parameters like the sky radiance and some aerosol properties, which can be obtained from these radiances. In this work, the ORION application has been developed to calibrate geometrically the all-sky cameras through the position of the stars. These calibrations are essential to locate the pixels of the camera pointing to a specific direction, such as the directions in which the sky radiance will be extracted. An all-sky camera has been geometrically calibrated with ORION, but it also has been configured to capture images in RAW format at different exposure times. The multi-exposure configuration, in addition with a exhaustive characterization of the camera (effective wavelengths, linearity, read noise, etc.), has allowed to obtain a linear high dynamic range image of the sky applying a proposed methodology. The sky radiance is proportional to the linear image obtained, so a relative sky radiance can be obtained with this proposed methodology. Once the relative sky radiances have been obtained with the all-sky camera, they have been used as input parameter in the GRASP (Generalized Retrieval of Atmosphere and Surface Properties) inversion algorithm to obtain some aerosol properties. It has been studied, using synthetic data, what aerosol properties can be derived from the relative sky radiance measured by all-sky cameras. The aerosol properties obtained with real measurements on GRASP have been compared with those independently derived by an AERONET (AErosol RObotic NETwork) photometer. This work concludes that, if the methodologies developed in this doctoral thesis are applied, a properly configured all-sky camera can be used to calculate the sky radiance, at least in a relative way, and these radiances can be also used to retrieve aerosol properties. |
2021 |
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103. | Hansen G; Kouremeti N; Gilardoni S; Stebel K; Evangeliou N; Ritter C; Zielinski T; Herrero S; Kazadzis S; Mateos D; Mazzola M; Pakszys P; Eleftheriadis K Long-term observations of aerosol optical depth and their relation to in-situ aerosol properties in the Svalbard region (LOAD-RIS) Book Chapter In: pp. 44-61, Svalbard Integrated Arctic Earth Observing System, 2021, ISBN: 978-82-93871-07-1. BibTeX | Tags: @inbook{abdN2021, |
104. | Daniel González-Fernández; Jorge Monzón; Elena Pascual; Íñigo de Loyola; Pablo Gila; Pablo Álvarez; Víctor M. González; David Mateos Efecto Schlieren: visualización de pequeños cambios en el índice de refracción Conference XIII Reunión Nacional de Óptica (RNO) Madrid, Spain (Online), 2021. BibTeX | Tags: @conference{González-Fernández2021, |
105. | S. Herrero-Anta; D. Mateos; R. Román; D. González-Fernández; C. Toledano; R. González; J. C. Antuña-Sanchez; V. E. Cachorro; A. Calle; A. M. de Frutos Empleo de técnicas de medida láser y fotométricas para la identificación de aerosoles atmosféricos en el Círculo polar Ártico Conference XIII Reunión Nacional de Óptica (RNO) Madrid, Spain (Online), 2021. BibTeX | Tags: @conference{Herrero-Anta2021d, |
106. | A.E. Bedoya-Velásquez; S. Lefebvre; M. Herreras-Giralda; R. Román; C. Toledano; T.Huet; R.Ceolato Inverse methods for retrieving aerosol products from ceilometers Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: Aerosol Properties, ceilometer, inverse methods @conference{Bedoya-Velásquez2021, |
107. | E. Bazo; M.J. Granados-Muñoz; J.A. Bravo-Aranda; R. Román Statistical analysis of the atmospheric aerosol radiative properties over a year in Granada Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: aerosol radiative properties @conference{Bazo2021, |
108. | A. Bereinkua; D. Pérez-Ramírez; H. Lyamani; A. Cazorla; R. Román; R. González; D. Bermejo-Pantaleón; S.D. Aguirre-García; S. Aranda; P. Cariñanos; M. J. Granados-Muñoz; J. A. Bravo-Aranda; J. Abril-Gago; L. Alados-Arboledas; J. L. Guerrero-Rascado First characterization of aerosol profiles retrieved from ceilometer and sun-photometer by the GRASP algorithm at the rural Guadiana-UGR station Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: aerosol profiles, ceilometer, GRASP, sun-photometer @conference{Bereinkua2021, |
109. | R. Román; R. González; A. Cazorla; M. Herreras-Giralda; J.C. Antuña-Sánchez; C. Toledano CAECENET: Columnar and vertically-resolved aerosol products in near-real-time joining sun/sky photometer and ceilometer measurement networks Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: aerosol products, ceilometer, sun-sky photometry @conference{Román2021, |
110. | R. Román; R. González; J.C. Antuña-Sánchez; A. Barreto; P. Martín; C. Toledano; R. Ramos; A. Cazorla; S. Herrero-Anta; D. Mateos; O. García; D. González-Fernández; R. Carracedo; M. Herreras-Giralda; V. Carreño; A. Calle; V.E. Cachorro; E. Cuevas; A. M. de Frutos Vertical profiles of aerosol properties retrieved at La Palma, Canary Islands, during the CUmbre-Vieja volcano eruption in September-October 2021 Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: Aerosol Properties @conference{Román2021b, |
111. | S. Herrero-Anta; D. Mateos; R. Román; D. González-Fernández; C. Toledano; R. González; V. E. Cachorro; A. Calle; A. M. de Frutos Identification and tracking of a desert dust plume detected at Ny-Ålesund, Svalbard Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. BibTeX | Tags: @conference{Herrero-Anta2021c, |
112. | Antuña-Marrero, J. C.; Mann, G. W.; Barnes, J.; Rodríguez Vega, A.; Shallcross, S.; Dhomse, S.; Keckhut, P.; Nardi, B.; Thomason, L. W. SSiRC stratospheric aerosols lidar data rescue Conference Virtual Stratospheric Sulfur and its Role on Climate (SSiRC) Online, 2021. @conference{Antuña-Marrero2021c, |
113. | A. Barreto; R. Román; M. Sicard; V. Rizi; R. Roininen; P. M. Romero-Campos; Y. González; S. Rodríguez; R. D. García; C. Torres; M. Iarlori; O. E. García; E. Cuevas; C. Córdoba-Jabonero; J. de la Rosa; A. Rodríguez-Gómez; C. Muñoz-Porcar; A. Comerón; A. Bedoya-Velásquez; J.C. Antuña-Sanchez; V. Neustroev; E. Pietropaolo; Y. Lopez-Darias; J. J. Bustos; O. Álvarez; C. Toledano; C. Aramo; R. González; F.A. Almansa; R. Ceolato; N. Prats; A. Redondas; C. Bayo; R. Ramos; S. L. León; P. Martín Characterization of volcanic aerosols from a synergetic perspective during Cumbre Vieja (La Palma) eruption Conference ACTRIS Week 2021 Online, 2021. BibTeX | Tags: @conference{Barreto2021c, |
114. | Antuña-Marrero, J. C.; Estevan, R.; Landulfo, E.; Rodríguez-Vega, A.; Antuña-Sanchez, J. C Extending LALINET observations to the Upper Troposphere and Lower Stratosphere (UTLS): A challenge in the post-COVID-19 era Conference XI Workshop on Lidar Measurements in Latin America Online, 2021. @conference{Antuña-Marrero2021d, |
115. | A. Bereinkua; D. Pérez-Ramírez; H. Lyamani; A. Cazorla; R. Román; R. González; D. Bermejo-Pantaleón; S. D. Aguirre-García; S. Aranda; P. Cariñanos; M. J. Granados-Muñoz; J. A. Bravo-Aranda; L. Alados-Arboledas; J. L. Guerrero-Rascado Intense Saharan Dust Event Over the Southern Iberian Peninsula in Spring 2021 study using GRASP Algorithm Conference XI Workshop on Lidar Measurements in Latin America (WLMÑLA XI) Punta Arenas, Chile, 2021. BibTeX | Tags: @conference{Bereinkua2021b, |
116. | O. E. García; M. Schneider; E. Sepúlveda; F. Hase; T. Blumenstock; E. Cuevas; R. Ramos; J. Gross; S. Barthlott; A. N. Röhling; E. Sanromá; Y. González; Á. J. Gómez-Peláez; M. Navarro-Comas; O. Puentedura; M. Yela; A. Redondas; V. Carre no; S. F. León-Luis; E. Reyes; R. D. García; P. P. Rivas; P. M. Romero-Campos; C. Torres; N. Prats; M. Hernández; C. López Twenty years of ground-based NDACC FTIR spectrometry at Izaña Observatory -- overview and long-term comparison to other techniques Journal Article In: Atmospheric Chemistry and Physics, vol. 21, no. 20, pp. 15519–15554, 2021. Links | BibTeX | Tags: long-term comparison, NDACC FTIR @article{García2021b, |
117. | Guerrero-Rascado, J.L.; Bereinkua, A.; Bermejo-Pantaléon, D.; Román, R.; González, R.; Cazorla, A.; Pérez-Ramírez, D.; Lyamani, H.; Aguirre-García, S. D.; Aranda, S.; Abril-Gago, J.; Granados-Muñoz, M. J.; Bravo-Aranda, J. A.; Alados-Arboledas, L.; Cariñanos, P First characterization of the pollen vertical profiles at an olive crop by remote sensing techniques Conference Air Pollution threats to Plant Ecosystems Conference Paphos, Cyprus, 2021. BibTeX | Tags: @conference{Guerrero-Rascado2021, |
118. | C Peris-Ferrús; J L Gómez-Amo; P C Valdelomar; F Scarlatti; R Román; C Emde; M P Utrillas Retrieval of cloud optical depth: synergies between whole sky imagers and radiative transfer modeling Conference Remote Sensing of Clouds and the Atmosphere XXVI (RS104) Madrid, Spain, 2021. BibTeX | Tags: @conference{Peris-Ferrús2021, |
119. | J. C. Antuña-Marrero; G. W. Mann; J. Barnes; A. Rodríguez-Vega; S. Shallcross; S. S. Dhomse; G. Fiocco; G. W. Grams In: Earth System Science Data, vol. 13, no. 9, pp. 4407–4423, 2021. Abstract | Links | BibTeX | Tags: aerosol, LIDAR @article{Antuña-Marrero2021, We report the recovery and processing methodology of the first ever multi-year lidar dataset of the stratospheric aerosol layer. A Q-switched ruby lidar measured 66 vertical profiles of 694?nm attenuated backscatter at Lexington, Massachusetts, between January 1964 and August 1965, with an additional nine profile measurements conducted from College, Alaska, during July and August 1964. We describe the processing of the recovered lidar backscattering ratio profiles to produce mid-visible (532?nm) stratospheric aerosol extinction profiles (sAEP532) and stratospheric aerosol optical depth (sAOD532) measurements, utilizing a number of contemporary measurements of several different atmospheric variables. Stratospheric soundings of temperature and pressure generate an accurate local molecular backscattering profile, with nearby ozone soundings determining the ozone absorption, which are used to correct for two-way ozone transmittance. Two-way aerosol transmittance corrections are also applied based on nearby observations of total aerosol optical depth (across the troposphere and stratosphere) from sun photometer measurements. We show that accounting for these two-way transmittance effects substantially increases the magnitude of the 1964/1965 stratospheric aerosol layer's optical thickness in the Northern Hemisphere mid-latitudes, then ??50?% larger than represented in the Coupled Model Intercomparison Project 6 (CMIP6) volcanic forcing dataset. Compared to the uncorrected dataset, the combined transmittance correction increases the sAOD532 by up to 66?% for Lexington and up to 27?% for Fairbanks, as well as individual sAEP532 adjustments of similar magnitude. Comparisons with the few contemporary measurements available show better agreement with the corrected two-way transmittance values. Within the January 1964 to August 1965 measurement time span, the corrected Lexington sAOD532 time series is substantially above 0.05 in three distinct periods, October 1964, March 1965, and May–June 1965, whereas the 6 nights the lidar measured in December 1964 and January 1965 had sAOD values of at most ??0.03. The comparison with interactive stratospheric aerosol model simulations of the Agung aerosol cloud shows that, although substantial variation in mid-latitude sAOD532 are expected from the seasonal cycle in the stratospheric circulation, the Agung cloud's dispersion from the tropics would have been at its strongest in winter and weakest in summer. The increasing trend in sAOD from January to July 1965, also considering the large variability, suggests that the observed variations are from a different source than Agung, possibly from one or both of the two eruptions that occurred in 1964/1965 with a Volcanic Explosivity Index (VEI) of 3: Trident, Alaska, and Vestmannaeyjar, Heimaey, south of Iceland. A detailed error analysis of the uncertainties in each of the variables involved in the processing chain was conducted. Relative errors for the uncorrected sAEP532 were 54?% for Fairbanks and 44?% Lexington. For the corrected sAEP532 the errors were 61?% and 64?%, respectively. The analysis of the uncertainties identified variables that with additional data recovery and reprocessing could reduce these relative error levels. Data described in this work are available at https://doi.org/10.1594/PANGAEA.922105 (Antuña-Marrero et al., 2020a). |
120. | S. Herrero-Anta Análisis de una pluma de aerosol mineral detectada en el Ártico mediante fotometría solar Masters Thesis Universidad de Valladolid, Valladolid, Spain, 2021. BibTeX | Tags: @mastersthesis{Herrero-Anta2021e, |
121. | J A Benavent-Oltra; J A Casquero-Vera; R Román; H Lyamani; D Pérez-Ramírez; M J Granados-Muñoz; M Herrera; A Cazorla; G Titos; P Ortiz-Amezcua; A E Bedoya-Velásquez; G de Arruda Moreira; N Pérez; A Alastuey; O Dubovik; J L Guerrero-Rascado; F J Olmo-Reyes; L Alados-Arboledas Overview of the SLOPE I and II campaigns: aerosol properties retrieved with lidar and sun--sky photometer measurements Journal Article In: Atmospheric Chemistry and Physics, vol. 21, no. 12, pp. 9269-9287, 2021. Links | BibTeX | Tags: Aerosol Properties, LIDAR, SLOPE, sun photometry @article{Benavent-Oltra2021, |
122. | Barreto, A.; García, O. E.; Schneider, M.; García, R.D.; Hase, F.; Sepúlveda, E.; Almansa, A.F.; Cuevas, E.; Blumenstock, T. Aerosol properties by ground-based TCCON FTIR spectrometry Conference TCCON/COCCON/NDACC Meeting 2021 Online, 2021. BibTeX | Tags: Aerosol Properties, FTIR, spectrometry @conference{Barreto2021b, |
123. | B. Barja; J. Rosas; V.E. Cachorro; C. Toledano; J.C. Antuña-Marrero; R. Estevan; A.M. de Frutos In: Atmósfera, vol. 36 (1), pp. 41-56, 2021. Abstract | Links | BibTeX | Tags: AERONET, cloud effects on solar radiation (CRE) at surface, cloud radiative effect, radiative transfer simulations @article{Barja2021, The effects of cumulus (Cu) clouds and the combination of stratocumulus-cumulus (Sc-Cu) clouds on solar radiation at the Earth’s surface were evaluated at Camagüey, Cuba, during a 6-yr period (from June 2010 to May 2016). Two methods to calculate the cloud radiative effect (CRE) were employed. The first method (CREm) uses solar irradiances in cloudy conditions from actinometric observations, where cloud informa-tion was also reported by visual observation. In the second method (CRE0) surface solar irradiances were estimated for both cloudy and clear sky conditions using a 1-D radiative transfer model, and cloud optical depth (COD) retrieved from an AERONET sun-photometer as the main input. A temporal correspondence criterion between COD retrievals and actinometric observations was performed in order to classify the COD of each cloud type. After the application of this criterion, the COD belonging to the optically thin clouds was removed. Finally, 255 and 732 COD observations for Cu and Sc-Cu, respectively, were found. Results show a statistically significant difference at the 95% confidence level between CRE calculated for Sc-Cu and Cu, using both methods. Mean values of CREm and CRE0 for Cu (Sc-Cu) were ?442 (?390) and ?460(?417) Wm–2, respectively. CRE0 shows a linear relation with ln(COD), with stronger correlation at a lower solar zenith angle. The shortwave cloud effect efficiency (CEE) for the two cloud types sharply decreases with the increase of the COD value up to 20. For larger COD, the CEE is less sensitive to the increase of COD. |
124. | Adolfo Comerón; Michaël Sicard; Marco Pandolfi; Roberto Román; ACTRIS-España ACTRIS-España y sus actividades durante el confinamiento del COVID-19 en 2020 Conference Congreso Nacional del Medioambiente (CONAMA2020) Granada, Spain, 2021. BibTeX | Tags: ACTRIS, aerosol @conference{Comerón2021, |
125. | Barreto, A.; García, O.E.; Schneider, M.; García, R.D.; Hase, F.; Sepúlveda, E.; Almansa, A.F.; Cuevas, E.; Blumenstock, T. Spectral Aerosol Optical Depth and Angstrom Exponent From Ground-Based Fourier Transform Infrared Spectrometry Conference Innovation in Atmospheric Sciences Virtual Workshop Online, 2021. BibTeX | Tags: aerosol optical depth, Angstrom Exponent, FTIR @conference{Barreto2021, |
126. | R. González; C. Toledano; R. Román Diez; D. Mateos; E. Asmi; E. Rodriguez; J.C. Antuña-Sánchez; S. Herrero-Anta; V.E. Cachorro; A. Calle; A.M. de Frutos Monitoring of long-range transported smoke in polar regions with remote sensing instruments Conference EGU21, European Geosciences Union (EGU) Online, 2021. Abstract | BibTeX | Tags: AERONET, Aerosol Properties, biomass burning, long-range transport, Polar Regions @conference{González2021bb, Long range transported aerosol from biomass burning affects polar regions, especially the Arctic. The frequency and intensity of bushfires in the context of a warming climate has been pointed out in the last report of the Intergovernmental Panel on Climate Change. In high latitudes, these events impact large areas through long-range transport of the smoke particles in the troposphere or even the stratosphere. The lifetime and radiative impact are related with the height of the plumes and the processes that modify particle size and absorptive properties during the transport. Several recent publications have shown the impact of the Australian smoke in the southern hemisphere, including Antarctica, in January-March 2020. The tools that were used to monitor that extraordinary event can be used in the Arctic to investigate similar effects in the frequent biomass burning events that generate smoke plumes in boreal regions. In this work, we present the results derived from ground-based instrumentation as well as satellite and model data. The change of the smoke properties after several days of transport is also provided, namely an increase in the fine mode particle size and the single scattering albedo, as well as a decrease in the coarse mode particle concentration. These features are relevant for radiative forcing calculations and therefore the impact of long range transported smoke in the radiative balance over polar regions. |
127. | S. Herrero-Anta; D. Mateos; C. Toledano; R. Román; R. González; C. Ritter; J.C. Antuña-Sanchez; D. González-Fernández; A. Calle; V.E. Cachorro; A.M. de Frutos Inventory of aerosol episodes in Ny-Ålesund (Svalbard) in the period 2017-2020 by sun photometry Conference EGU21, European Geosciences Union (EGU) Online, 2021. Abstract | BibTeX | Tags: AERONET, Arctic Haze, High turbidity episodes, Svalbard @conference{Herrero-Anta2021b, Atmospheric aerosols are an important forcing agent in the estimation of radiative budget, being the Arctic an area of special weakness. The Group of Atmospheric Optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79ºN, 12ºE). This study presents an inventory of all high-turbidity aerosol episodes recorded in the period 2017-2020 (data of level 1.5-validated from AERONET). This inventory is based on the separate analysis of coarse and fine mode aerosol optical depth. Aerosol episodes are attributed to coarse, fine or mixture of aerosols. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from big forest fires in Canada, United States and Russia |
128. | S. Taylor; S. Adriaensen; C. Toledano; A. Barreto; E. Woolliams; M. Bouvet LIME: the Lunar Irradiance Model of the European Space Agency Conference EGU21, European Geosciences Union (EGU) Online, 2021. Abstract | BibTeX | Tags: calibration, LIME, lunar photometry @conference{Taylor2021, Absolute calibration of Earth observation sensors is key to ensuring long term stability and interoperability, essential for long term global climate records and forecasts. The Moon provides a photometrically stable calibration source, within the range of the Earth radiometric levels, and is free from atmospheric interference. However, to use this ideal calibration source, one must model the variation of its disk integrated irradiance resulting from changes in Sun-Earth-Moon geometries. LIME, the Lunar Irradiance Model of the European Space Agency, is a new lunar irradiance model developed from ground-based observations acquired using a lunar photometer operating from the Izaña Atmospheric Observatory and Teide Peak, Tenerife. Approximately 300 lunar observations acquired between March 2018 and October 2020 currently contribute to the model, which builds on the widely-used ROLO (Robotic Lunar Observatory) model. This presentation will outline the strategy used to derive LIME. First, the instrument was calibrated traceably to SI and characterised to determine its thermal sensitivity and its linearity over the wide dynamic range required. Second, the instrument was installed at the observatory, and nightly observations over a two-hour time window were extrapolated to provide top-of-atmosphere lunar irradiance using the Langley plot method. Third, these observations were combined to derive the model. Each of these steps includes a metrologically rigorous uncertainty analysis. Comparisons to several EO sensors will be presented including Proba-V, Pleiades and Sentinel 3A and 3B, as well as a comparison to GIRO, the GSICS implementation of the ROLO model. Initial results indicate LIME predicts 3% - 5% higher disk integrated lunar irradiance than the GIRO/ROLO model for the visible and near-infrared channels. The model has an expanded (k = 2) absolute radiometric uncertainty of ~2%, and it is expected that planned observations until at least 2024 will further constrain the model in subsequent updates. |
129. | Antuña-Marrero, J. C.; Mann, G.; Barnes, J.; Rodríguez-Vega, A.; Shallcross, S.; Dhomse, S.; Fiocco, G.; Grams, G.W. Data rescue of stratospheric aerosol observations from lidar at Lexington, MA, and Fairbanks, AK, January 1964 to July 1965 Conference European Geosciences Union (EGU) Online, 2021. @conference{Antuña-Marrero2021b, |
130. | S. Herrero-Anta; C. Toledano; R. Román; R. González; C. Rtitter; J.C. Antuña-Sánchez; D. González-Fernández; A. Calle; V.E. Cachorro; A.M. de Frutos Long range transported aerosol events over Ny-Alesund (Svalbard) in 2020 observed with Sun-Sky-Moon photometry Conference Arctic Science Summit Week 2021 (ASSW2021), International Arctic Science Committee (IASC) Lisbon, Portugal (online), 2021. Abstract | BibTeX | Tags: AERONET, Aerosol Properties, Arctic Haze, biomass burning, Svalbard @conference{Herrero-Anta2021, The recent development of the of Sun-sky-Moon photometers allows using both Sun and Moon as light sources to retrieve columnar aerosol properties. In this framework, the Group of Atmospheric optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79oN, 12oE). This instrument contributes to the AErosol RObotic NETwork (AERONET), and it is recording a continuous (summer +winter) database of columnar aerosol properties. This study presents an inventory of all high-turbidity aerosol episodes recorded in 2020 based on the mentioned photometer measurements. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from forest fires in Canada, United States and Russia. |
131. | R. González; C. Toledano; R. Román; D. Mateos; E. Asmi; E. Rodríguez; J.C. Antuña-Sánchez; S. Herrero-Anta; V.E. Cachorro; A. Calle; A.M. de Frutos Monitoring of long-range transported smoke in polar regions with remote sensing instruments Conference Arctic Science Summit Week 2021 (ASSW2021), International Arctic Science Committee (IASC) Lisbon, Portugal (online), 2021. Abstract | BibTeX | Tags: AERONET, Aerosol Properties, biomass burning, Polar Regions, Transport @conference{González2021b, Long range transported aerosol from biomass burning affects polar regions, especially the Arctic. The frequency and intensity of bushfires in the context of a warming climate has been pointed out in the last report of the Intergovernmental Panel on Climate Change. In high latitudes, these events impact large areas through long-range transport of the smoke particles in the troposphere or even the stratosphere. The lifetime and radiative impact are related with the height of the plumes and the processes that modify particle size and absorptive properties during the transport. Several recent publications have shown the impact of the Australian smoke in the southern hemisphere, including Antarctica, in January-March 2020. The tools that were used to monitor that extraordinary event can be used in the Arctic to investigate similar effects in the frequent biomass burning events that generate smoke plumes in boreal regions. In this work, we present the results derived from ground-based instrumentation as well as satellite and model data. The change of the smoke properties after several days of transport is also provided, namely an increase in the fine mode particle size and the single scattering albedo, as well as a decrease in the coarse mode particle concentration. These features are relevant for radiative forcing calculations and therefore the impact of long range transported smoke in the radiative balance over polar regions. |
132. | Barreto, A.; Doppler, L.; Toledano, C.; Mazzola, M.; Kouremeti, N.; Uchiyama, A.; Novikov, V.; Navas-Guzmán, F.; Román, R.; Ritter, C.; González, R.; Vitale, V.; Stone, R.; Ivanescu, L.; Schulz, K.H.; Yamazahki, A. Preliminary results on the third lunar/stellar AOD intercomparison campaign at Lindenberg’s MOL-RAO Observatory Conference Arctic Science Summit Week 2021 Lisbon, Portugal (online), 2021. BibTeX | Tags: AOD, lunar photometry, stellar photometry @conference{Barreto2021d, |
133. | J C Antuña-Sánchez; R Román; V E Cachorro; C Toledano; C López; R González; D Mateos; A Calle; Á M de Frutos Relative sky radiance from multi-exposure all-sky camera images Journal Article In: Atmospheric Measurement Techniques, vol. 14, no. 3, pp. 2201–2217, 2021. Abstract | Links | BibTeX | Tags: Radiative transfer, sky camera, sky radiance @article{amt-14-2201-2021, All-sky cameras are frequently used to detect cloud cover; however, this work explores the use of these instruments for the more complex purpose of extracting relative sky radiances. An all-sky camera (SONA202-NF model) with three colour filters narrower than usual for this kind of cameras is configured to capture raw images at seven exposure times. A detailed camera characterization of the black level, readout noise, hot pixels and linear response is carried out. A methodology is proposed to obtain a linear high dynamic range (HDR) image and its uncertainty, which represents the relative sky radiance (in arbitrary units) maps at three effective wavelengths. The relative sky radiances are extracted from these maps and normalized by dividing every radiance of one channel by the sum of all radiances at this channel. Then, the normalized radiances are compared with the sky radiance measured at different sky points by a sun and sky photometer belonging to the Aerosol Robotic Network (AERONET). The camera radiances correlate with photometer ones except for scattering angles below 10?, which is probably due to some light reflections on the fisheye lens and camera dome. Camera and photometer wavelengths are not coincident; hence, camera radiances are also compared with sky radiances simulated by a radiative transfer model at the same camera effective wavelengths. This comparison reveals an uncertainty on the normalized camera radiances of about 3.3?%, 4.3?% and 5.3?% for 467, 536 and 605?nm, respectively, if specific quality criteria are applied. |
134. | Román, R.; González, R.; Toledano, C.; Barreto, A.; Pérez-Ramírez, D.; Benavent-Oltra, J. A.; Olmo, F. J.; Cachorro, V.E.; Alados-Arboledas, L.; de Frutos, A. M. New methodology to calculate AOD from lunar photometer Conference Arctic Science Summit Week 2021 (ASSW2021) Lisboa, Portugal (Online), 2021. BibTeX | Tags: aerosol optical depth, lunar photometry @conference{Román2021c, |
135. | Mazzola, M.; Toledano, C.; Ivanescu, L.; Stone, R.; Ritter, C.; Vitale, V.; Doppler, L.; Stone, T.; Hansen, G.H.; Kouremeti, N.; Sasamoto, K.; McComiskey, A.; Barreto, A.; Román, R.; González, R.; Cachorro, V.E.; Barnes, J.E.; Uchiyama, A.; Yamanouchi, T. Advances in Polar night AOD retrieval Conference Arctic Science Summit Week 2021 (ASSW2021) Lisbon, Portugal (online), 2021. BibTeX | Tags: aerosol optical depth, polarmoon @conference{Mazzola2021, |
136. | Ana Barroso; Sandra Mogo; Manuela M V G Silva; Victoria Cachorro; Ángel de Frutos Morphology, Mineralogy, and Chemistry of Atmospheric Aerosols Nearby an Active Mining Area: Aljustrel Mine (SW Portugal) Journal Article In: Atmosphere, vol. 12, no. 3, 2021, ISSN: 2073-4433. Abstract | Links | BibTeX | Tags: atmospheric aerosols, ICP-MS, Mining exploitation, SEM-EDX @article{atmos12030333, Mining activities increase contaminant levels in the environment, so it is crucial to study the particulate matter in these areas to understand the impacts on nearby urban areas and populations. This work was conducted close to the active mine of Aljustrel (Portugal), where black dust deposition is evident. PM10 samples were collected in two periods: 10–17 July and 1–10 November of 2018. Two different techniques were used: SEM-EDX for the individual characterization of the aerosols and ICP-MS to quantify the elemental concentration of 11 elements (Ca, Na, Fe, Mn, As, Cd, Cu, Sb, Pb, and Zn). In this region, the observed PM10 mass concentration was 20 to 47 µg m ?3 (July) and 4 to 23 µg m?3 (November), which is lower than the limit of 50 ?g m?3 established in the European Directive. The individual characterization of 2006 particles by SEM-EDX shows oxides (17%) and sulfides (10%), while Na, Si, Fe, S, Al, and Cu are the elements with the most representativeness in all the analyzed particles. The ICP-MS results indicate that the daily elemental concentration in the samples collected in July is higher than November, and only As exceeds the limit established for European legislation. |
137. | AE Bedoya-Velásquez; M Herreras-Giralda; R Román; M Wiegner; S Lefebvre; C Toledano; T Huet; R Ceolato Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals Journal Article In: Atmospheric Research, pp. 105379, 2021. Abstract | Links | BibTeX | Tags: aerosol inversion, Ceilometer data pre-processing, Microwave radiometry, Vaisala ceilometer @article{bedoya2021ceilometer, Recent ceilometer models are more sensitive to aerosols, which is increasing the interest in these instruments to retrieve aerosol optical and microphysical properties. In this paper, a new methodology is proposed to retrieve aerosol vertical extinction and backscatter profiles from a Vaisala ceilometer CL51 model. This methodology is based in two parts: first, a signal pre-processing with a suppression of the dark current and background noises, and a correction of the water vapor absorption using near-real-time temperature and absolute humidity (AH) profiles from a co-located Microwave radiometer (MWR). The measured dark current shows a height-dependence from 11?km agl to the end of the profile. From the water vapor correction, it was seen that the raw ceilometer signal overestimates the water vapor corrected one, mainly below 1?km agl. Second part is based on an iterative Klett-based algorithm making use of AERONET (AErosol RObotic NETwork) AOD (Aerosol Optical Depth) and ceilometer profiles as inputs to retrieve the extinction and backscatter profiles. The sensitivity of the aerosol retrievals to the use of modelled temperature and absolute humidity from HYSPLIT to correct water vapor absorption, instead of MWR measurements, is studied. The absolute errors found in temperature and AH profiles leads to errors in the pre-processed range corrected signals up to 9%, and then in particle backscatter (?p) and particle extinction (?p) coefficients up to 2.2 % and 25 %, respectively. |
138. | Rosa Delia García; Emilio Cuevas; Victoria Eugenia Cachorro; Omaira E. García; África Barreto; A. Fernando Almansa; Pedro M. Romero-Campos; Ramón Ramos; Mário Pó; Kees Hoogendijk; Jochen Gross Water Vapor Retrievals from Spectral Direct Irradiance Measured with an EKO MS-711 Spectroradiometer—Intercomparison with Other Techniques Journal Article In: Remote Sensing, vol. 13, no. 3, 2021, ISSN: 2072-4292. Abstract | Links | BibTeX | Tags: EKO MS-711 spectroradiometer, Monte-Carlo method, spectral direct irradiance, Water vapor @article{García2021, Precipitable water vapor retrievals are of major importance for assessing and understanding atmospheric radiative balance and solar radiation resources. On that basis, this study presents the first PWV values measured with a novel EKO MS-711 grating spectroradiometer from direct normal irradiance in the spectral range between 930 and 960 nm at the Izaña Observatory (IZO, Spain) between April and December 2019. The expanded uncertainty of PWV (UPWV) was theoretically evaluated using the Monte-Carlo method, obtaining an averaged value of 0.37 ± 0.11 mm. The estimated uncertainty presents a clear dependence on PWV. For PWV ≤ 5 mm (62% of the data), the mean UPWV is 0.31 ± 0.07 mm, while for PWV > 5 mm (38% of the data) is 0.47 ± 0.08 mm. In addition, the EKO PWV retrievals were comprehensively compared against the PWV measurements from several reference techniques available at IZO, including meteorological radiosondes, Global Navigation Satellite System (GNSS), CIMEL-AERONET sun photometer and Fourier Transform Infrared spectrometry (FTIR). The EKO PWV values closely align with the above mentioned different techniques, providing a mean bias and standard deviation of −0.30 ± 0.89 mm, 0.02 ± 0.68 mm, −0.57 ± 0.68 mm, and 0.33 ± 0.59 mm, with respect to the RS92, GNSS, FTIR and CIMEL-AERONET, respectively. According to the theoretical analysis, MB decreases when comparing values for PWV > 5 mm, leading to a PWV MB between −0.45 mm (EKO vs. FTIR), and 0.11 mm (EKO vs. CIMEL-AERONET). These results confirm that the EKO MS-711 spectroradiometer is precise enough to provide reliable PWV data on a routine basis and, as a result, can complement existing ground-based PWV observations. The implementation of PWV measurements in a spectroradiometer increases the capabilities of these types of instruments to simultaneously obtain key parameters used in certain applications such as monitoring solar power plants performance. |
139. | Ramiro González Catón Universidad de Valladolid, 2021, (dirección: Carlos Toledano, Roberto Román). Abstract | Links | BibTeX | Tags: AOD, nuevos métodos, procesados, tesis @phdthesis{Gonzalez2021, Se define como aerosol atmosférico a aquellas partículas que se encuentran suspendidas en la atmósfera en estado sólido o líquido. El estudio y análisis de los aerosoles son de vital impor- tancia debido a que estos afectan al clima, a la actividad humana y a la salud de las personas. Distintas redes operan de forma rutinaria y con un grado mayor o menor de automatización con el objetivo de obtener medidas y productos de aerosoles para su posterior análisis. Las medidas ópticas o de detección remota, como las que proporcionan los fotómetros desde tierra y muchos sensores de satélite, basan su funcionamiento en la interacción de la luz con los aerosoles. Uno de los principales productos de estas redes es el espesor óptico de aerosoles (AOD del inglés Ae- rosol Optical Depth). Normalmente se obtiene el AOD midiendo con un fotómetro la irradiancia directa del Sol que llega a la superficie terrestre, ya que la cantidad de irradiancia directa solar extinguida durante su paso por la atmósfera terrestre depende del AOD a través de la ley de Beer- Bouguer-Lambert. El AOD está relacionado con la cantidad de aerosoles presentes en la columna atmosférica, y su variación espectral ligada al tamaño predominante de las partículas. Recientes avances y mejoras en los instrumentos de medida fotométrica han permitido adaptar las medidas directas al Sol también a la Luna, pudiendo obtener valores de AOD también durante la noche. Esto permite que en aquellas zonas con largos periodos nocturnos, principalmente en las zonas polares, se pueda de igual manera obtener información relacionada con los aerosoles. Esto ayuda a rellenar huecos muy relevantes en las series de datos obtenidas en estas zonas, que hasta ahora contaban tan solo con fotometría solar. En este trabajo se aborda el análisis de las propiedades del aerosol atmosférico a través de la creación y mejora de nuevos procesados y productos. En concreto se presenta el desarrollo de nuevos métodos para el cálculo operacional del AOD en una red de instrumentos, tanto para el día como para la noche. En primer lugar, se ha desarrollado el cálculo del AOD durante el día describiendo paso a paso su proceso y datos utilizados. En una segunda instancia se ha adaptado este cálculo a la noche, describiendo de igual manera los modelos utilizados y desarrollando una nueva corrección sobre estos, la cual se propone para la mejora en el cálculo del AOD por la noche. Los productos obtenidos mediante ambos métodos se han contrastado con series de datos independientes y de referencia, que nos ha permitido asegurar la calidad del algoritmo. Finalmente, la puesta en producción de ambos productos en el sistema CÆLIS ha permitido de- tectar un evento de aerosoles extremadamente anómalo en una de las estaciones que el Grupo de Óptica Atmosférica de la Universidad de Valladolid opera en la estación de Marambio, en la Antártida. Con la ayuda de otras medidas complementarias y algunos modelos atmosféricos, se ha descubierto que los aerosoles procedían de la quema de biomasa generada por incendios localizados en el Este de Australia a finales de 2019. La detección de este evento pone de mani- fiesto la importancia y el valor de disponer de medidas rutinarias, procesamientos automatizados y productos de calidad que permitan analizar las propiedades del aerosol atmosférico. |
140. | Juan Carlos Antuña-Sánchez; René Estevan; Roberto Román; Juan Carlos Antuña-Marrero; Victoria E Cachorro; Albeth Rodríguez Vega; Ángel M de Frutos Solar Radiation Climatology in Camagüey, Cuba (1981–2016) Journal Article In: Remote Sensing, vol. 13, no. 2, 2021, ISSN: 2072-4292. Abstract | Links | BibTeX | Tags: climatology, cloud cover, cuba, diffuse, direct radiation, insolation, Solar radiation @article{rs13020169, The transition to renewable energies is an unavoidable step to guarantee a peaceful and sustainable future for humankind. Although solar radiation is one of the main sources of renewable energy, there are broad regions of the planet where it has not been characterized appropriately to provide the necessary information for regional and local planning and design of the different solar powered systems. The Caribbean, and Cuba in particular, lacked until very recently at least one long-term series of surface solar radiation measurements. Here we present the first long-term records of solar radiation for this region. Solar radiation measurements manually conducted and recorded on paper were rescued, reprocessed and quality controlled to develop the solar radiation climatology at the Actinometrical Station of Camagüey, in Cuba (21.422°N; 77.850°W; 122 m a.s.l.) for the period 1981–2016. The diurnal cycle based on the average hourly values of the global, direct and diffuse horizontal variables for the entire period have been determined and analyzed showing the dependence on solar zenith angle (SZA) and clouds. The annual cycle of global solar component given by the mean monthly daily values presents two maxima, one in April and another one in July with values of 5.06 and 4.91 kWh m−2, respectively (18.23 and 17.67 MJ m−2 per day for insolation), and the minimum in December (3.15 kWh m−2 or 11.33 MJ m−2). The maxima are governed by the direct solar components and are modulated by cloudiness. Both, diurnal and annual cycles of the diffuse solar component show a smoothed bell shaped behavior. In general solar radiation at this station presents a strong influence of clouds, with little seasonal variation but with higher values during the rainy season. Daily global radiation annual averages showed its maximum value in the year 1983, with 17.45 MJ m−2 explained by very low cloudiness this year, and the minimum value was reported in 2009 with a value of 12.43 MJ m−2 that could not explained by the cloud coverage or the aerosols optical depths registered that year. The effects of the 1982 El Chichón and 1991 Mount Pinatubo volcanic eruptions on the solar radiation variables at Camagüey are also shown and discussed. The results achieved in this study shown the characteristics of solar radiation in this area and their potential for solar power applications. |
141. | Antonio Fernando Almansa Rodríguez 2021, (Universidad de Valladolid. Dirección: Dr. Emilio Cuevas Agulló, Dr. Benjamín Torres Rodríguez y Dr. Ángel Máximo de Frutos Baraja.). Abstract | Links | BibTeX | Tags: aerosol, radiometer, water vapour @phdthesis{Rodríguez2021, La presente tesis doctoral pretende introducir herramientas que permitan aumentar la capacidad observacional de los aerosoles y el vapor de agua en la atmósfera con el fin de contribuir a la mejora de la representación espacio-temporal de estos componentes atmosféricos a nivel global/regional y la estimación de sus tendencias. Esta labor será desarrollada haciendo uso de observaciones multi-plataforma capaces de incrementar la cobertura y la disponibilidad de información relevante de los aerosoles atmosféricos y vapor de agua desde el punto de vista científico |
2020 |
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142. | Sarah Taylor; Stefan Adriaensen; Carlos Toledano; Alberto Berjón; Africa Baretto; Emma Woolliams; Maria Garcia-Miranda; Marc Bouvet The Lunar Irradiance Model of ESA (LIME) Conference GSICS Lunar calibration workshop, GSICS Global Space-based Inter-Calibration System Darmstadt, Germany, 2020. BibTeX | Tags: lunar photometry @conference{Taylor2020, |
143. | A. Barreto; R. Román; N. Prats; A. Lopatin; D. Fuertes; A.J. Berjón; F. Almansa; E. Cuevas; M. Yela. Aerosol Profiles From MPL-Lidar And Photometric Measurements Using GRASP In A Subtropical North Atlantic Site. Evaluation With In-Situ Data. Conference European Lidar Conference 2020 (ELC 2020), University of Granada Granada, Spain, 2020. BibTeX | Tags: aerosol, GRASP, in-situ, LIDAR @conference{Barreto2020, |
144. | L. Alados-Arboledas; R. Román; J.A. Benavent-Oltra; A. Cazorla; J.A. Casquero-Vera; G. Titos; H. Lyamani; P. Ortíz-Amezcua; G.A. Moreira; A.E. Bedoya-Velasquez; D. Pérez-Ramírez; J.L. Guerrero-Rascado; F.J. Olmo Assessment of the atmospheric aerosol properties retrieved by GRASP algorithm during SLOPE II campaign Conference European Lidar Conference 2020 (ELC 2020), Universidad de Granada Granada, Spain, 2020. @conference{Alados-Arboledas2020, |
145. | D. Mateos; V.E. Cachorro; C. Velasco-Merino; N.T. O'Neill; M.A. Burgos; R. Gonzalez; C. Toledano; M. Herreras; A. Calle; A.M. de Frutos Comparison of three different methodologies for the identification of high atmospheric turbidity episodes Journal Article In: Atmospheric Research, pp. 104835, 2020. Links | BibTeX | Tags: Biomass burning urban industrial, Coarse and fine modes, Columnar and surface aerosols, desert dust, High turbidity episodes @article{Mateos2020b, |
146. | R. D. García-Cabrera; E. Cuevas-Agulló; Á. Barreto; V. E. Cachorro; M. Pó; R. Ramos; K. Hoogendijk Aerosol retrievals from the EKO MS-711 spectral direct irradiance measurements and corrections of the circumsolar radiation Journal Article In: Atmospheric Measurement Techniques, vol. 13, no. 5, pp. 2601–2621, 2020. Links | BibTeX | Tags: aerosol optical depth, langley, Solar radiation, spectroradiometer, UV-visible irradiance @article{García-Cabrera2020, |
147. | Graham, M.; Antuña-Marrero, J. C.; Maycock, A.; McKenna, C.; Shallcross, S.; Dhomse, S.; Thomason, L.; Luo, B.; Deshler, T.; Rosen, J Recovered measurements of the 1960s stratospheric aerosol layer for new constraints for volcanic forcing in the years after 1963 Agung Conference European Geosciences Union (EGU) Online, 2020. @conference{Graham2020, |
148. | Lovely Euphrasie-Clotilde; Thomas Plocoste; Tony Feuillard; Cristian Velasco-Merino; David Mateos; Carlos Toledano; France-Nor Brute; Céline Bassette; Marieline Gobinddass Assessment of a new detection threshold for PM10 concentrations linked to African dust events in the Caribbean Basin Journal Article In: Atmospheric Environment, pp. 117354, 2020. Links | BibTeX | Tags: aerosol optical depth, Air mass back trajectories, air quality index, Caribbean area, desert dust, PM10 threshold @article{euphrasie2020assessment, |
149. | Tymon Zielinski; Ezio Bolzacchini; Marco Cataldi; Luca Ferrero; Sandra Graßl; Georg Hansen; David Mateos; Mauro Mazzola; Roland Neuber; Paulina Pakszys; others Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017 Journal Article In: Atmosphere, vol. 11, no. 1, pp. 84, 2020. BibTeX | Tags: @article{zielinski2020study, |
150. | Tymon Zielinski; Ezio Bolzacchini; Marco Cataldi; Luca Ferrero; Sandra Graßl; Georg Hansen; David Mateos; Mauro Mazzola; Roland Neuber; Paulina Pakszys; Michal Posyniak; Christoph Ritter; Mirko Severi; Piotr Sobolewski; Rita Traversi; Cristian Velasco-Merino Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017 Journal Article In: Atmosphere, vol. 11, no. 1, pp. 84, 2020. Links | BibTeX | Tags: aerosol, aerosol optical depth, artic, biomass burning, long-range transport @article{zielinski2020studyb, |
Search an Article
2022 |
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101. | Climatology of aerosols over the Caribbean islands: aerosol types, synoptic patterns and transport Journal Article In: Journal of Applied Meteorology and Climatology, 2022. |
102. | Universidad de Valladolid, 2022, (dirección: Roberto Román, Ángel M. de Frutos y Victoria E. Cachorro.). |
2021 |
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103. | Long-term observations of aerosol optical depth and their relation to in-situ aerosol properties in the Svalbard region (LOAD-RIS) Book Chapter In: pp. 44-61, Svalbard Integrated Arctic Earth Observing System, 2021, ISBN: 978-82-93871-07-1. |
104. | Efecto Schlieren: visualización de pequeños cambios en el índice de refracción Conference XIII Reunión Nacional de Óptica (RNO) Madrid, Spain (Online), 2021. |
105. | Empleo de técnicas de medida láser y fotométricas para la identificación de aerosoles atmosféricos en el Círculo polar Ártico Conference XIII Reunión Nacional de Óptica (RNO) Madrid, Spain (Online), 2021. |
106. | Inverse methods for retrieving aerosol products from ceilometers Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
107. | Statistical analysis of the atmospheric aerosol radiative properties over a year in Granada Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
108. | First characterization of aerosol profiles retrieved from ceilometer and sun-photometer by the GRASP algorithm at the rural Guadiana-UGR station Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
109. | CAECENET: Columnar and vertically-resolved aerosol products in near-real-time joining sun/sky photometer and ceilometer measurement networks Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
110. | Vertical profiles of aerosol properties retrieved at La Palma, Canary Islands, during the CUmbre-Vieja volcano eruption in September-October 2021 Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
111. | Identification and tracking of a desert dust plume detected at Ny-Ålesund, Svalbard Conference European Lidar Conference 2021 (ELC2021) Granada, Spain, 2021. |
112. | SSiRC stratospheric aerosols lidar data rescue Conference Virtual Stratospheric Sulfur and its Role on Climate (SSiRC) Online, 2021. |
113. | Characterization of volcanic aerosols from a synergetic perspective during Cumbre Vieja (La Palma) eruption Conference ACTRIS Week 2021 Online, 2021. |
114. | Extending LALINET observations to the Upper Troposphere and Lower Stratosphere (UTLS): A challenge in the post-COVID-19 era Conference XI Workshop on Lidar Measurements in Latin America Online, 2021. |
115. | Intense Saharan Dust Event Over the Southern Iberian Peninsula in Spring 2021 study using GRASP Algorithm Conference XI Workshop on Lidar Measurements in Latin America (WLMÑLA XI) Punta Arenas, Chile, 2021. |
116. | Twenty years of ground-based NDACC FTIR spectrometry at Izaña Observatory -- overview and long-term comparison to other techniques Journal Article In: Atmospheric Chemistry and Physics, vol. 21, no. 20, pp. 15519–15554, 2021. |
117. | First characterization of the pollen vertical profiles at an olive crop by remote sensing techniques Conference Air Pollution threats to Plant Ecosystems Conference Paphos, Cyprus, 2021. |
118. | Retrieval of cloud optical depth: synergies between whole sky imagers and radiative transfer modeling Conference Remote Sensing of Clouds and the Atmosphere XXVI (RS104) Madrid, Spain, 2021. |
119. | In: Earth System Science Data, vol. 13, no. 9, pp. 4407–4423, 2021. |
120. | Análisis de una pluma de aerosol mineral detectada en el Ártico mediante fotometría solar Masters Thesis Universidad de Valladolid, Valladolid, Spain, 2021. |
121. | Overview of the SLOPE I and II campaigns: aerosol properties retrieved with lidar and sun--sky photometer measurements Journal Article In: Atmospheric Chemistry and Physics, vol. 21, no. 12, pp. 9269-9287, 2021. |
122. | Aerosol properties by ground-based TCCON FTIR spectrometry Conference TCCON/COCCON/NDACC Meeting 2021 Online, 2021. |
123. | In: Atmósfera, vol. 36 (1), pp. 41-56, 2021. |
124. | ACTRIS-España y sus actividades durante el confinamiento del COVID-19 en 2020 Conference Congreso Nacional del Medioambiente (CONAMA2020) Granada, Spain, 2021. |
125. | Spectral Aerosol Optical Depth and Angstrom Exponent From Ground-Based Fourier Transform Infrared Spectrometry Conference Innovation in Atmospheric Sciences Virtual Workshop Online, 2021. |
126. | Monitoring of long-range transported smoke in polar regions with remote sensing instruments Conference EGU21, European Geosciences Union (EGU) Online, 2021. |
127. | Inventory of aerosol episodes in Ny-Ålesund (Svalbard) in the period 2017-2020 by sun photometry Conference EGU21, European Geosciences Union (EGU) Online, 2021. |
128. | LIME: the Lunar Irradiance Model of the European Space Agency Conference EGU21, European Geosciences Union (EGU) Online, 2021. |
129. | Data rescue of stratospheric aerosol observations from lidar at Lexington, MA, and Fairbanks, AK, January 1964 to July 1965 Conference European Geosciences Union (EGU) Online, 2021. |
130. | Long range transported aerosol events over Ny-Alesund (Svalbard) in 2020 observed with Sun-Sky-Moon photometry Conference Arctic Science Summit Week 2021 (ASSW2021), International Arctic Science Committee (IASC) Lisbon, Portugal (online), 2021. |
131. | Monitoring of long-range transported smoke in polar regions with remote sensing instruments Conference Arctic Science Summit Week 2021 (ASSW2021), International Arctic Science Committee (IASC) Lisbon, Portugal (online), 2021. |
132. | Preliminary results on the third lunar/stellar AOD intercomparison campaign at Lindenberg’s MOL-RAO Observatory Conference Arctic Science Summit Week 2021 Lisbon, Portugal (online), 2021. |
133. | Relative sky radiance from multi-exposure all-sky camera images Journal Article In: Atmospheric Measurement Techniques, vol. 14, no. 3, pp. 2201–2217, 2021. |
134. | New methodology to calculate AOD from lunar photometer Conference Arctic Science Summit Week 2021 (ASSW2021) Lisboa, Portugal (Online), 2021. |
135. | Advances in Polar night AOD retrieval Conference Arctic Science Summit Week 2021 (ASSW2021) Lisbon, Portugal (online), 2021. |
136. | Morphology, Mineralogy, and Chemistry of Atmospheric Aerosols Nearby an Active Mining Area: Aljustrel Mine (SW Portugal) Journal Article In: Atmosphere, vol. 12, no. 3, 2021, ISSN: 2073-4433. |
137. | Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals Journal Article In: Atmospheric Research, pp. 105379, 2021. |
138. | Water Vapor Retrievals from Spectral Direct Irradiance Measured with an EKO MS-711 Spectroradiometer—Intercomparison with Other Techniques Journal Article In: Remote Sensing, vol. 13, no. 3, 2021, ISSN: 2072-4292. |
139. | Universidad de Valladolid, 2021, (dirección: Carlos Toledano, Roberto Román). |
140. | Solar Radiation Climatology in Camagüey, Cuba (1981–2016) Journal Article In: Remote Sensing, vol. 13, no. 2, 2021, ISSN: 2072-4292. |
141. | 2021, (Universidad de Valladolid. Dirección: Dr. Emilio Cuevas Agulló, Dr. Benjamín Torres Rodríguez y Dr. Ángel Máximo de Frutos Baraja.). |
2020 |
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142. | The Lunar Irradiance Model of ESA (LIME) Conference GSICS Lunar calibration workshop, GSICS Global Space-based Inter-Calibration System Darmstadt, Germany, 2020. |
143. | Aerosol Profiles From MPL-Lidar And Photometric Measurements Using GRASP In A Subtropical North Atlantic Site. Evaluation With In-Situ Data. Conference European Lidar Conference 2020 (ELC 2020), University of Granada Granada, Spain, 2020. |
144. | Assessment of the atmospheric aerosol properties retrieved by GRASP algorithm during SLOPE II campaign Conference European Lidar Conference 2020 (ELC 2020), Universidad de Granada Granada, Spain, 2020. |
145. | Comparison of three different methodologies for the identification of high atmospheric turbidity episodes Journal Article In: Atmospheric Research, pp. 104835, 2020. |
146. | Aerosol retrievals from the EKO MS-711 spectral direct irradiance measurements and corrections of the circumsolar radiation Journal Article In: Atmospheric Measurement Techniques, vol. 13, no. 5, pp. 2601–2621, 2020. |
147. | Recovered measurements of the 1960s stratospheric aerosol layer for new constraints for volcanic forcing in the years after 1963 Agung Conference European Geosciences Union (EGU) Online, 2020. |
148. | Assessment of a new detection threshold for PM10 concentrations linked to African dust events in the Caribbean Basin Journal Article In: Atmospheric Environment, pp. 117354, 2020. |
149. | Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017 Journal Article In: Atmosphere, vol. 11, no. 1, pp. 84, 2020. |
150. | Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017 Journal Article In: Atmosphere, vol. 11, no. 1, pp. 84, 2020. |