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@article{Antuña-Marrero2021,

title = {Recovery of the first ever multi-year lidar dataset of the stratospheric aerosol layer, from Lexington, MA, and Fairbanks, AK, January 1964 to July 1965},

author = {J. C. Antuña-Marrero and G. W. Mann and J. Barnes and A. Rodríguez-Vega and S. Shallcross and S. S. Dhomse and G. Fiocco and G. W. Grams},

url = {https://essd.copernicus.org/articles/13/4407/2021/},

doi = {10.5194/essd-13-4407-2021},

year  = {2021},

date = {2021-09-08},

urldate = {2021-01-01},

journal = {Earth System Science Data},

volume = {13},

number = {9},

pages = {4407--4423},

abstract = {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).},

keywords = {aerosol, LIDAR},

pubstate = {published},

tppubtype = {article}

}

@article{Benavent-Oltra2021,

title = {Overview of the SLOPE I and II campaigns: aerosol properties retrieved with lidar and sun--sky photometer measurements},

author = {J A Benavent-Oltra and J A Casquero-Vera and R Román and H Lyamani and D Pérez-Ramírez and M J Granados-Muñoz and M Herrera and A Cazorla and G Titos and P Ortiz-Amezcua and A E Bedoya-Velásquez and G de Arruda Moreira and N Pérez and A Alastuey and O Dubovik and J L Guerrero-Rascado and F J Olmo-Reyes and L Alados-Arboledas},

url = {https://acp.copernicus.org/articles/21/9269/2021/},

doi = {10.5194/acp-21-9269-2021},

year  = {2021},

date = {2021-06-17},

journal = {Atmospheric Chemistry and Physics},

volume = {21},

number = {12},

pages = {9269-9287},

keywords = {Aerosol Properties, LIDAR, SLOPE, sun photometry},

pubstate = {published},

tppubtype = {article}

}

@article{Barja2021,

title = {Surface shortwave cloud radiative effect of Cumulus (Cu) and Stratocumulus-Cumulus (Sc-Cu) cloud types in the Caribbean area (Camagüey Cuba, 2010-2016)},

author = {B. Barja and J. Rosas and V.E. Cachorro and C. Toledano and J.C. Antuña-Marrero and R. Estevan and A.M. de Frutos},

doi = {10.20937/ATM.52858},

year  = {2021},

date = {2021-06-02},

urldate = {2021-06-02},

journal = {Atmósfera},

volume = {36 (1)},

pages = {41-56},

abstract = {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.},

keywords = {AERONET, cloud effects on solar radiation (CRE) at surface, cloud radiative effect, radiative transfer simulations},

pubstate = {published},

tppubtype = {article}

}

@article{amt-14-2201-2021,

title = {Relative sky radiance from multi-exposure all-sky camera images},

author = {J C Antuña-Sánchez and R Román and V E Cachorro and C Toledano and C López and R González and D Mateos and A Calle and Á M de Frutos},

url = {https://amt.copernicus.org/articles/14/2201/2021/},

doi = {10.5194/amt-14-2201-2021},

year  = {2021},

date = {2021-03-22},

journal = {Atmospheric Measurement Techniques},

volume = {14},

number = {3},

pages = {2201--2217},

abstract = {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.},

keywords = {Radiative transfer, sky camera, sky radiance},

pubstate = {published},

tppubtype = {article}

}

@article{atmos12030333,

title = {Morphology, Mineralogy, and Chemistry of Atmospheric Aerosols Nearby an Active Mining Area: Aljustrel Mine (SW Portugal)},

author = {Ana Barroso and Sandra Mogo and Manuela M V G Silva and Victoria Cachorro and Ángel de Frutos},

url = {https://www.mdpi.com/2073-4433/12/3/333},

doi = {10.3390/atmos12030333},

issn = {2073-4433},

year  = {2021},

date = {2021-03-05},

journal = {Atmosphere},

volume = {12},

number = {3},

abstract = {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.},

keywords = {atmospheric aerosols, ICP-MS, Mining exploitation, SEM-EDX},

pubstate = {published},

tppubtype = {article}

}

@article{bedoya2021ceilometer,

title = {Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals},

author = {AE Bedoya-Velásquez and M Herreras-Giralda and R Román and M Wiegner and S Lefebvre and C Toledano and T Huet and R Ceolato},

doi = {10.1016/j.atmosres.2020.105379},

year  = {2021},

date = {2021-03-01},

journal = {Atmospheric Research},

pages = {105379},

publisher = {Elsevier},

abstract = {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.},

keywords = {aerosol inversion, Ceilometer data pre-processing, Microwave radiometry, Vaisala ceilometer},

pubstate = {published},

tppubtype = {article}

}

@article{García2021,

title = {Water Vapor Retrievals from Spectral Direct Irradiance Measured with an EKO MS-711 Spectroradiometer—Intercomparison with Other Techniques},

author = {Rosa Delia García and Emilio Cuevas and Victoria Eugenia Cachorro and Omaira E. García and África Barreto and A. Fernando Almansa and Pedro M. Romero-Campos and Ramón Ramos and Mário Pó and Kees Hoogendijk and Jochen Gross},

url = {https://www.mdpi.com/2072-4292/13/3/350},

doi = {10.3390/rs13030350},

issn = {2072-4292},

year  = {2021},

date = {2021-01-20},

urldate = {2021-01-01},

journal = {Remote Sensing},

volume = {13},

number = {3},

abstract = {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.},

keywords = {EKO MS-711 spectroradiometer, Monte-Carlo method, spectral direct irradiance, Water vapor},

pubstate = {published},

tppubtype = {article}

}

@article{rs13020169,

title = {Solar Radiation Climatology in Camagüey, Cuba (1981–2016)},

author = {Juan Carlos Antuña-Sánchez and René Estevan and Roberto Román and Juan Carlos Antuña-Marrero and Victoria E Cachorro and Albeth Rodríguez Vega and Ángel M de Frutos},

url = {https://www.mdpi.com/2072-4292/13/2/169},

doi = {10.3390/rs13020169},

issn = {2072-4292},

year  = {2021},

date = {2021-01-01},

journal = {Remote Sensing},

volume = {13},

number = {2},

abstract = {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.},

keywords = {climatology, cloud cover, cuba, diffuse, direct radiation, insolation, Solar radiation},

pubstate = {published},

tppubtype = {article}

}

@article{Mateos2020b,

title = {Comparison of three different methodologies for the identification of high atmospheric turbidity episodes},

author = {D. Mateos and V.E. Cachorro and C. Velasco-Merino and N.T. O'Neill and M.A. Burgos and R. Gonzalez and C. Toledano and M. Herreras and A. Calle and A.M. de Frutos},

doi = { 10.1016/j.atmosres.2019.104835},

year  = {2020},

date = {2020-06-01},

journal = {Atmospheric Research},

pages = {104835},

publisher = {Elsevier},

keywords = {Biomass burning urban industrial, Coarse and fine modes, Columnar and surface aerosols, desert dust, High turbidity episodes},

pubstate = {published},

tppubtype = {article}

}

@article{García-Cabrera2020,

title = {Aerosol retrievals from the EKO MS-711 spectral direct irradiance measurements and corrections of the circumsolar radiation},

author = {R. D. García-Cabrera and E. Cuevas-Agulló and Á. Barreto and V. E. Cachorro and M. Pó and R. Ramos and K. Hoogendijk},

url = {https://amt.copernicus.org/articles/13/2601/2020/},

doi = {10.5194/amt-13-2601-2020},

year  = {2020},

date = {2020-05-20},

urldate = {2020-01-01},

journal = {Atmospheric Measurement Techniques},

volume = {13},

number = {5},

pages = {2601--2621},

keywords = {aerosol optical depth, langley, Solar radiation, spectroradiometer, UV-visible irradiance},

pubstate = {published},

tppubtype = {article}

}

@article{euphrasie2020assessment,

title = {Assessment of a new detection threshold for PM10 concentrations linked to African dust events in the Caribbean Basin},

author = {Lovely Euphrasie-Clotilde and Thomas Plocoste and Tony Feuillard and Cristian Velasco-Merino and David Mateos and Carlos Toledano and France-Nor Brute and Céline Bassette and Marieline Gobinddass},

doi = {10.1016/j.atmosenv.2020.117354},

year  = {2020},

date = {2020-03-01},

journal = {Atmospheric Environment},

pages = {117354},

publisher = {Elsevier},

keywords = {aerosol optical depth, Air mass back trajectories, air quality index, Caribbean area, desert dust, PM10 threshold},

pubstate = {published},

tppubtype = {article}

}

@article{zielinski2020study,

title = {Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017},

author = {Tymon Zielinski and Ezio Bolzacchini and Marco Cataldi and Luca Ferrero and Sandra Graßl and Georg Hansen and David Mateos and Mauro Mazzola and Roland Neuber and Paulina Pakszys and others},

year  = {2020},

date = {2020-01-01},

journal = {Atmosphere},

volume = {11},

number = {1},

pages = {84},

publisher = {Multidisciplinary Digital Publishing Institute},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{zielinski2020studyb,

title = {Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017},

author = {Tymon Zielinski and Ezio Bolzacchini and Marco Cataldi and Luca Ferrero and Sandra Graßl and Georg Hansen and David Mateos and Mauro Mazzola and Roland Neuber and Paulina Pakszys and Michal Posyniak and Christoph Ritter and Mirko Severi and Piotr Sobolewski and Rita Traversi and Cristian Velasco-Merino },

doi = {https://doi.org/10.3390/atmos11010084},

year  = {2020},

date = {2020-01-01},

urldate = {2020-01-01},

journal = {Atmosphere},

volume = {11},

number = {1},

pages = {84},

publisher = {Multidisciplinary Digital Publishing Institute},

keywords = {aerosol, aerosol optical depth, artic, biomass burning, long-range transport},

pubstate = {published},

tppubtype = {article}

}

@article{almansa2020column,

title = {Column Integrated Water Vapor and Aerosol Load Characterization with the New ZEN-R52 Radiometer},

author = {Antonio Fernando Almansa and Emilio Cuevas and África Barreto and Benjam{'i}n Torres and Omaira Elena Garc{'i}a and Rosa Delia Garc{'i}a and Cristian Velasco-Merino and Victoria Eugenia Cachorro and Alberto Berjón and Manuel Mallorquín and César López and Ramón Ramos and Carmen Guirado-Fuertes and Ramón Negrillo and Ángel M. de Frutos},

doi = {https://doi.org/10.3390/rs12091424},

year  = {2020},

date = {2020-01-01},

urldate = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {9},

pages = {1424},

publisher = {Multidisciplinary Digital Publishing Institute},

keywords = {aerosol, water vapour, ZEN-R52 Radiometer},

pubstate = {published},

tppubtype = {article}

}

@article{gonzalez2020daytime,

title = {Daytime and nighttime aerosol optical depth implementation in CÆLIS},

author = {Ramiro González and Carlos Toledano and Roberto Román and David Fuertes and Alberto Berjón and David Mateos and Carmen Guirado-Fuentes and Cristian Velasco-Merino and Juan Carlos Antuña-Sánchez and Abel Calle and Victoria E. Cachorro and Angel M. de Frutos},

doi = {10.5194/gi-9-417-2020},

year  = {2020},

date = {2020-01-01},

urldate = {2020-01-01},

journal = {Geoscientific Instrumentation, Methods and Data Systems},

volume = {9},

number = {2},

pages = {417--433},

publisher = {Copernicus GmbH},

keywords = {aerosol optical depth, caelis, moon, sun photometry},

pubstate = {published},

tppubtype = {article}

}

@article{rs12223769,

title = {Characterization of Stratospheric Smoke Particles over the Antarctica by Remote Sensing Instruments},

author = {Ramiro González and Carlos Toledano and Roberto Román and David Mateos and Eija Asmi and Edith Rodríguez and Ian C Lau and Jonathan Ferrara and Raúl D’Elia and Juan Carlos Antuña-Sánchez and Victoria E Cachorro and Abel Calle and Ángel M de Frutos},

url = {https://www.mdpi.com/2072-4292/12/22/3769},

doi = {10.3390/rs12223769},

issn = {2072-4292},

year  = {2020},

date = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {22},

abstract = {Australian smoke from the extraordinary biomass burning in December 2019 was observed over Marambio, Antarctica from the 7th to the 10th January, 2020. The smoke plume was transported thousands of kilometers over the Pacific Ocean, and reached the Antarctic Peninsula at a hight of 13 km, as determined by satellite lidar observations. The proposed origin and trajectory of the aerosol are supported by back-trajectory model analyses. Ground-based Sun-Sky-Moon photometer belonging to the Aerosol Robotic Network (AERONET) measured aerosol optical depth (500 nm wavelength) above 0.3, which is unprecedented for the site. Inversion of sky radiances provide the optical and microphysical properties of the smoke over Marambio. The AERONET data near the fire origin in Tumbarumba, Australia, was used to investigate the changes in the measured aerosol properties after transport and ageing. The analysis shows an increase in the fine mode particle radius and a reduction in absorption (increase in the single scattering albedo). The available long-term AOD data series at Marambio suggests that smoke particles could have remained over Antarctica for several weeks after the analyzed event.},

keywords = {aerosol, Antarctica, Australian fires, biomass burning, optical properties, smoke ageing},

pubstate = {published},

tppubtype = {article}

}

@article{acp-20-14253-2020,

title = {New particle formation at urban and high-altitude remote sites in the south-eastern Iberian Peninsula},

author = {J A Casquero-Vera and H Lyamani and L Dada and S Hakala and P Paasonen and R Román and R Fraile and T Petäjä and F J Olmo-Reyes and L Alados-Arboledas},

url = {https://acp.copernicus.org/articles/20/14253/2020/},

doi = {10.5194/acp-20-14253-2020},

year  = {2020},

date = {2020-01-01},

journal = {Atmospheric Chemistry and Physics},

volume = {20},

number = {22},

pages = {14253--14271},

keywords = {aerosol, particle formation, urban},

pubstate = {published},

tppubtype = {article}

}

@article{amt-13-6293-2020,

title = {Correction of a lunar-irradiance model for aerosol optical depth retrieval and comparison with a star photometer},

author = {R Román and R González and C Toledano and Á Barreto and D Pérez-Ramírez and J A Benavent-Oltra and F J Olmo and V E Cachorro and L Alados-Arboledas and Á M de Frutos},

url = {https://amt.copernicus.org/articles/13/6293/2020/},

doi = {10.5194/amt-13-6293-2020},

year  = {2020},

date = {2020-01-01},

journal = {Atmospheric Measurement Techniques},

volume = {13},

number = {11},

pages = {6293--6310},

keywords = {aerosol optical depth, lunar photometry, star photometry},

pubstate = {published},

tppubtype = {article}

}

@article{rs12081307,

title = {Evaluation of Water Vapor Radiative Effects Using GPS Data Series over Southwestern Europe},

author = {Javier Vaquero-Martínez and Manuel Antón and Arturo Sanchez-Lorenzo and Victoria E Cachorro},

url = {https://www.mdpi.com/2072-4292/12/8/1307},

doi = {10.3390/rs12081307},

issn = {2072-4292},

year  = {2020},

date = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {8},

abstract = {Water vapor radiative effects (WVRE) at surface in the long-wave (LW) and short-wave (SW) spectral ranges under cloud and aerosol free conditions are analyzed for seven stations in Spain over the 2007-2015 period. WVRE is calculated as the difference between the net flux obtained by two radiative transfer simulations; one with water vapor from Global Positioning System (GPS) measurements and the other one without any water vapor (dry atmosphere). The WVRE in the LW ranges from 107.9 Wm 2 to 296.7 Wm − 2 , while in the SW it goes from − 64.9 Wm − 2 to − 6.0 Wm − 2 . The results show a clear seasonal cycle, which allows the classification of stations in three sub-regions. In general, for total (SW + LW) and LW WVRE, winter (DJF) and spring (MAM) values are lower than summer (JJA) and autumn (SON). However, in the case of SW WVRE, the weaker values are in winter and autumn, and the stronger ones in summer and spring. Positive trends for LW (and total) WVRE may partially explain the well-known increase of surface air temperatures in the study region. Additionally, negative trends for SW WVRE are especially remarkable, since they represent about a quarter of the contribution of aerosols to the strong brightening effect (increase of the SW radiation flux at surface associated with a reduction of the cloud cover and aerosol load) observed since the 2000s in the Iberian Peninsula, but with opposite sign, so it is suggested that water vapor could be partially masking the full magnitude of this brightening.},

keywords = {Europe, long-wave, radiativa effect, Radiative transfer, Sourthwestern Europe, Spain, Water vapor},

pubstate = {published},

tppubtype = {article}

}

@article{vaquero2020water,

title = {Water vapor satellite products in the European Arctic: An inter-comparison against GNSS data},

author = {Javier Vaquero-Martínez and Manuel Antón and Roberto Román and Victoria E Cachorro and Huiqun Wang and Gonzalo González Abad and Christoph Ritter},

url = {https://www.sciencedirect.com/science/article/pii/S0048969720338572},

doi = {10.1016/j.scitotenv.2020.140335},

year  = {2020},

date = {2020-01-01},

journal = {Science of The Total Environment},

volume = {741},

pages = {140335},

publisher = {Elsevier},

keywords = {European Artic, GNSS, Ny-Alesund, Satellite, Water vapor},

pubstate = {published},

tppubtype = {article}

}

@article{rs12132074,

title = {Editorial for the Special Issue “Remote Sensing of Atmospheric Components and Water Vapor”},

author = {Victoria E Cachorro and Manuel Antón},

url = {https://www.mdpi.com/2072-4292/12/13/2074},

doi = {10.3390/rs12132074},

issn = {2072-4292},

year  = {2020},

date = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {13},

abstract = {The observation/monitoring of atmospheric components and water vapor in the atmosphere is today open to very different remote sensing techniques, most of them based on the radiation-matter interaction covering the full electromagnetic spectrum. This SI collects some papers regarding the retrieval, calibration, validation, analysis of data and uncertainties, as well as comparative studies on atmospheric gases and water vapor by remote sensing techniques, where different types of sensors, instruments, and algorithms are used or developed.},

keywords = {atmosphere, atmospheric gases, LIDAR, Ozone, pollutant, radiometry, remote sensing, sensor satellinte, spectroscopy, Water vapor},

pubstate = {published},

tppubtype = {article}

}

@article{acp-20-13627-2020,

title = {Evaluating the simulated radiative forcings, aerosol properties, and stratospheric warmings from the 1963 Mt Agung, 1982 El Chichón, and 1991 Mt Pinatubo volcanic aerosol clouds},

author = {S S Dhomse and G W Mann and J C Antuña Marrero and S E Shallcross and M P Chipperfield and K S Carslaw and L Marshall and N L Abraham and C E Johnson},

url = {https://acp.copernicus.org/articles/20/13627/2020/},

doi = {10.5194/acp-20-13627-2020},

year  = {2020},

date = {2020-01-01},

journal = {Atmospheric Chemistry and Physics},

volume = {20},

number = {21},

pages = {13627--13654},

keywords = {aerosol, Radiative forcing, volcanic aerosol},

pubstate = {published},

tppubtype = {article}

}

@article{essd-12-2843-2020,

title = {Shipborne lidar measurements showing the progression of the tropical reservoir of volcanic aerosol after the June 1991 Pinatubo eruption},

author = {J -C Antuña-Marrero and G W Mann and P Keckhut and S Avdyushin and B Nardi and L W Thomason},

url = {https://essd.copernicus.org/articles/12/2843/2020/},

doi = {10.5194/essd-12-2843-2020},

year  = {2020},

date = {2020-01-01},

journal = {Earth System Science Data},

volume = {12},

number = {4},

pages = {2843--2851},

keywords = {LIDAR, volcanic aerosol},

pubstate = {published},

tppubtype = {article}

}

@article{rs12030436,

title = {Worldwide Evaluation of Ozone Radiative Forcing in the UV-B Range between 1979 and 2014},

author = {David Mateos and Manuel Antón},

url = {https://www.mdpi.com/2072-4292/12/3/436},

doi = {10.3390/rs12030436},

issn = {2072-4292},

year  = {2020},

date = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {3},

abstract = {Ultraviolet (UV) radiation plays a key role in different planetary mechanisms, thus necessitating a worldwide analysis of this solar spectrum interval. This study offers a worldwide and long-term analysis of ozone radiative forcing (ORF) in the UV-B range between 1979 and 2014. The method uses monthly total ozone column (TOC) values obtained from the ERA-Interim reanalysis data collection and radiative transfer simulations. A global mean ORF of 0.011 Wm−2 is obtained, with marked differences between mid-latitude and tropical areas. The mid-latitude belts in the Northern and Southern Hemispheres exhibit the following statistically significant ORF trends between 1982 and 2014 with respect to pre-1980 values: 0.007 Wm−2 per decade in the 60-45°S belt and around 0.004 Wm−2 per decade in the 45-30°S and 45-60°N belts. The increase observed in the net UV-B radiation levels at the troposphere might have relevant photochemical effects that impact climate change.},

keywords = {global analysis, long-term trends, ozone radiative forcing, radiative transfer simulations, reanalysis data, ultraviolet radiation},

pubstate = {published},

tppubtype = {article}

}

@article{MATEOS2020104835,

title = {Comparison of three different methodologies for the identification of high atmospheric turbidity episodes},

author = {D Mateos and V E Cachorro and C Velasco-Merino and N T O'Neill and M A Burgos and R Gonzalez and C Toledano and M Herreras and A Calle and A M de Frutos},

url = {http://www.sciencedirect.com/science/article/pii/S0169809519309792},

doi = {https://doi.org/10.1016/j.atmosres.2019.104835},

issn = {0169-8095},

year  = {2020},

date = {2020-01-01},

volume = {237},

pages = {104835},

abstract = {The identification and characterization of High Atmospheric Turbidity (HAT) episodes is a key objective of global aerosol monitoring. This study presents a comparison of three different methodologies that were used to identify HAT episodes in the north-central Iberian Peninsula. The first methodology (named C&S inventory) is based on columnar aerosol optical depth (AOD from the Aerosol Robotic Network, AERONET) and surface particulate matter concentrations (PMx from the European Monitoring and Evaluation Programme, EMEP) as well as ancillary information. Another methodology (named SPR) is based on PM surface concentrations levels and ancillary information. Both methods are carefully reviewed by human observers. A third method, based only on fine and coarse mode values of AOD was also analysed. This method (the SDA or Spectral Deconvolution Algorithm) is found to be a good operational candidate for automating the identification of HAT episodes. The three methods allow for the identification of mineral desert dust (coarse type ‘D’) aerosols and aerosols of fine type, ‘A’ (i.e. biomass burning or polluted aerosols): their mixture, categorized as ‘MD’ and ‘MA’ classes (depending of the prevailing ‘D’ or ‘A’ type) is only identified in the C&S and SDA inventories. The three inventories show about 60% coincidence across a 2005–2014 reference period. When the C&S and SDA inventories are compared, the agreement is very high if columnar aerosol data is available: >90% for desert aerosol type and >70% for fine aerosol type. The comparative study of these three aerosol inventories was motivated by the need to automate existing methodologies.},

keywords = {Biomass burning urban industrial, Coarse and fine modes, Columnar and surface aerosols, desert dust, High turbidity episodes},

pubstate = {published},

tppubtype = {article}

}