Dr. Abel Calle

Graduate in Physics at Universidad de Valladolid (1991) and PhD at University of Valladolid in 1997. He has worked in Remote Sensing applications in national y an international research projects; mainly in projects funded by European Space Agency and the main remote sensing and space companies (GMV, Deimos Space, Indra, etc). One of the most important achievement was his participation as co-founder of the spin-off company Deimos-Imaging, in Spain, and his participation as researcher in the implementation of the first Spanish remote sensing satellite: Deimos-1. Abel Calle was the only official representative in Baikonur Russian spaceport during the launch of satellite in July 2009. He was the vice-chairman of the Spanish remote sensing Society during 4 years and he was the President of Physics section of the University of Valladolid. Currently he is the Head of Applied Physics Department of the University of Valladolid.

Publications

74 entries « ‹ 1 of 2 › »

2024

A. Calle; J. Gatón; R. González; R. Carracedo; R. Román; P. Martín; D. Mateos; C. Toledano; V. Cachorro; J.A. Sobrino; D. Skokovich; A.M. de Frutos

Puesta en operación, de instrumentación, en la Base Antártica de Marambio Conference

XX Congreso de la Asociación Española de Teledetección AET2024, 4-7 Jun 2024 Cádiz, Spain, 2024.

O.E. García; N. Taquet; E. Sepúlveda; R. Ramos; F. Hase; D. Dubravika; A. Alcántara; J. Guerola; P.P. Rivas; S.F. León-Luis; V. Carreño; M. Yela; J.A. Adame; G. Villalba-Méndez; R. Curcoll; A. Calle; C. Toledano; P. Martín-Mateos; A. Moreno-Oyervides; Ó. Bonilla-Manrique; J. Alonso-Montesinos; J.M. Ballestrín-Bolea; C. Torres

COCCON-España: Hacia un Sistema Integrado de Gases de Efecto Invernadero en España Conference

XX Congreso de la Asociación Española de Teledetección AET2024, 4-7 Jun 2024 Cádiz, Spain, 2024.

S. Herrero-Anta; C. Herrero del Barrio; D. Mateos; R. Román; D. González-Fernández; R. González; C. Toledano; V.E. Cachorro; A. Calle; Á.M. de Frutos

Caracterización de eventos de alta turbiedad por fotometría solar en el Ártico europeo entre 2017-2020 y su correspondiente efecto radiativo Conference

Poster presentation X Simposio de estudios polares 15-17 May 2024 Salamanca, Spain, 2024.

D. González-Fernández; R. Román; J.C. Antuña-Sánchez; V.E. Cachorro; G. Copes; S. Herrero-Anta; C. Herrero-del Barrio; Á. Barreto; R. González; R. Ramos; P. Martín; D. Mateos; C. Toledano; A. Calle; Á.M. de Frutos

Development and application over an Antarctic station of a neural network model to retrieve cloud cover from all-sky cameras Conference

Poster presentation X Simposio de estudios polares 15-17 May 2024 Salamanca, Spain, 2024.

D. Mateos; R. González; S. Herrero-Anta; C. Herrero del Barrio; R. Román; D. González-Fernández; E. Asmi; E. Rodriguez; I.C. Lau; R. D’Elia; C. Toledano; V.E. Cachorro; A. Calle; Á.M. de Frutos

Seguimiento de una pluma de aerosol originado por la quema de biomasa desde Australia hasta la Antártida Conference

Poster presentation X Simposio de estudios polares 15-17 May 2024 Salamanca, Spain, 2024.

S. Herrero-Anta; C. Herrero del Barrio; D. Mateos; R. Román; C. Ritter; D. González-Fernández; R. González; C. Toledano; V.E. Cachorro; A. Calle; Á.M. de Frutos

Aerosol properties retrieved under high turbidity conditions and the corresponding aerosol radiative effect in the European Arctic in the period 2017-2022 by sun photometry Conference

Poster presentation ACTRIS Science Conference 13-16 May 2024 Rennes, France, 2024.

D. González-Fernández; R. Román; J.C. Antuña-Sánchez; V.E. Cachorro; G. Copes; S. Herrero-Anta; C. Herrero-del Barrio; Á. Barreto; R. González; R. Ramos; P. Martín; D. Mateos; C. Toledano; A. Calle; Á.M. de Frutos

Application in an Antarctic site of a neural network for cloud cover retrieval from all-sky cameras Conference

Poster presentation ACTRIS Science Conference 13-16 May 2024 Rennes, France, 2024.

J.C. Antuña-Marrero; J. Añel; L. de la Torre; A. Calle; E. Landulfo

Searchlight stratospheric density observations during 1950 and 1952 rescued and digitized Conference

Poster presentation XII International Workshop on Long-Term Changes and Trends in the Atmosphere Ourense, Spain, 2024.

J.C. Antuña-Marrero; A. Calle; J. Pacheco; E. Landulfo; J. Añel; L. de la Torre

Rescued searchlight stratospheric aerosol extinction observations from 1963 to 1976 to complement the ones from December 1963 to December 1964 Conference

Poster presentation XII International Workshop on Long-Term Changes and Trends in the Atmosphere Ourense, Spain, 2024.

A. Calle; J.C. Antuña-Marrero; N. Rojas; J. Gatón; R. González; R. Carracedo; R. Román; P. Martín; D. Mateos; C. Toledano; V.E. Cachorro; A. de Frutos

Set-up instrumentation in the Antarctic Station of Marambio to detect atmospheric events: case of forest fires in Chile Conference

Poster presentation XII International Workshop on Long-Term Changes and Trends in the Atmosphere Ourense, Spain, 2024.

S. Herrero-Anta; D. Mateos; R. Román; D. González-Fernández; C. Herrero del Barrio; R. González; C. Toledano; V.E. Cachorro; A. Calle; Á.M. de Frutos

Identificación de eventos de alta turbiedad de aerosol en el Ártico europeo mediante fotometría solar Conference

Oral presentation 10 Jonadas de Investigadoras de Castilla y León, 18-19 Apr 2024 Valladolid, Spain, 2024.

J.C. Antuña-Marrero; G.W. Mann; J. Barnes; A. Calle; S.S. Dhomse; V.E. Cachorro; T. Deshler; Z. Li; N. Sharma; L. Elterman

The Recovery and Re-Calibration of a 13-Month Aerosol Extinction Profiles Dataset from Searchlight Observations from New Mexico, after the 1963 Agung Eruption Journal Article

In: Atmosphere, vol. 15, no. 6, 2024, ISSN: 2073-4433.

Abstract | Links | BibTeX

@article{atmos15060635,

title = {The Recovery and Re-Calibration of a 13-Month Aerosol Extinction Profiles Dataset from Searchlight Observations from New Mexico, after the 1963 Agung Eruption},

author = {J.C. Antuña-Marrero and G.W. Mann and J. Barnes and A. Calle and S.S. Dhomse and V.E. Cachorro and T. Deshler and Z. Li and N. Sharma and L. Elterman},

url = {https://www.mdpi.com/2073-4433/15/6/635},

doi = {10.3390/atmos15060635},

issn = {2073-4433},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {Atmosphere},

volume = {15},

number = {6},

abstract = {The recovery and re-calibration of a dataset of vertical aerosol extinction profiles of the 1963/64 stratospheric aerosol layer measured by a searchlight at 32°N in New Mexico, US, is reported. The recovered dataset consists of 105 aerosol extinction profiles at 550 nm that cover the period from December 1963 to December 1964. It is a unique record of the portion of the aerosol cloud from the March 1963 Agung volcanic eruption that was transported into the Northern Hemisphere subtropics. The data-recovery methodology involved re-digitizing the 105 original aerosol extinction profiles from individual Figures within a research report, followed by the re-calibration. It involves inverting the original equation used to compute the aerosol extinction profile to retrieve the corresponding normalized detector response profile. The re-calibration of the original aerosol extinction profiles used Rayleigh extinction profiles calculated from local soundings. Rayleigh and aerosol slant transmission corrections are applied using the MODTRAN code in transmission mode. Also, a best-estimate aerosol phase function was calculated from observations and applied to the entire column. The tropospheric aerosol phase function from an AERONET station in the vicinity of the searchlight location was applied between 2.76 to 11.7 km. The stratospheric phase function, applied for a 12.2 to 35.2 km altitude range, is calculated from particle-size distributions measured by a high-altitude aircraft in the vicinity of the searchlight in early 1964. The original error estimate was updated considering unaccounted errors. Both the re-calibrated aerosol extinction profiles and the re-calibrated stratospheric aerosol optical depth magnitudes showed higher magnitudes than the original aerosol extinction profiles and the original stratospheric aerosol optical depth, respectively. However, the magnitudes of the re-calibrated variables show a reasonable agreement with other contemporary observations. The re-calibrated stratospheric aerosol optical depth demonstrated its consistency with the tropics-to-pole decreasing trend, associated with the major volcanic eruption stratospheric aerosol pattern when compared to the time-coincident stratospheric aerosol optical depth lidar observations at Lexington at 42° N.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

The recovery and re-calibration of a dataset of vertical aerosol extinction profiles of the 1963/64 stratospheric aerosol layer measured by a searchlight at 32°N in New Mexico, US, is reported. The recovered dataset consists of 105 aerosol extinction profiles at 550 nm that cover the period from December 1963 to December 1964. It is a unique record of the portion of the aerosol cloud from the March 1963 Agung volcanic eruption that was transported into the Northern Hemisphere subtropics. The data-recovery methodology involved re-digitizing the 105 original aerosol extinction profiles from individual Figures within a research report, followed by the re-calibration. It involves inverting the original equation used to compute the aerosol extinction profile to retrieve the corresponding normalized detector response profile. The re-calibration of the original aerosol extinction profiles used Rayleigh extinction profiles calculated from local soundings. Rayleigh and aerosol slant transmission corrections are applied using the MODTRAN code in transmission mode. Also, a best-estimate aerosol phase function was calculated from observations and applied to the entire column. The tropospheric aerosol phase function from an AERONET station in the vicinity of the searchlight location was applied between 2.76 to 11.7 km. The stratospheric phase function, applied for a 12.2 to 35.2 km altitude range, is calculated from particle-size distributions measured by a high-altitude aircraft in the vicinity of the searchlight in early 1964. The original error estimate was updated considering unaccounted errors. Both the re-calibrated aerosol extinction profiles and the re-calibrated stratospheric aerosol optical depth magnitudes showed higher magnitudes than the original aerosol extinction profiles and the original stratospheric aerosol optical depth, respectively. However, the magnitudes of the re-calibrated variables show a reasonable agreement with other contemporary observations. The re-calibrated stratospheric aerosol optical depth demonstrated its consistency with the tropics-to-pole decreasing trend, associated with the major volcanic eruption stratospheric aerosol pattern when compared to the time-coincident stratospheric aerosol optical depth lidar observations at Lexington at 42° N.

2023

S. Herrero-Anta; D. Mateos; R. Román; C. Ritter; D. González-Fernández; C. Herrero del Barrio; R. González; C. Toledano; V.E. Cachorro; A. Calle; Á.M. de Frutos.

Aerosol properties retrieved under high turbidity conditions and the corresponding aerosol radiative effect in the European Arctic in the period 2017-2022 by sun photometry Conference

Svalbard Science Conference 2023 Oslo, Norway, 2023.

C. Herrero del Barrio; D. Mateos; R. Román; R. González; S. Herrero-Anta; D. González-Fernández; A. Calle; C. Toledano; V.E. Cachorro; A.M. de Frutos

Analysis of daytime and night-time aerosol optical depth from sun and lunar photometry at North Central Iberian Peninsula Conference

European Aerosol Conference 2023, Málaga, Spain, 2023.

D. Mateos; C. Toledano; R. Román; R. González; S. Herrero-Anta; D. González-Fernández; C. Herrero del Barrio; A. Calle; V.E. Cachorro; A. M de Frutos.

Columnar aerosol properties by sun and lunar photometry in the Arctic and in the Antarctica Conference

European Aerosol Conference 2023, Málaga, Spain, 2023.

Celia Herrero del Barrio; David Mateos; Roberto Román; Ramiro González; Sara Herrero-Anta; Daniel González-Fernández; Abel Calle; Carlos Toledano; Victoria Eugenia Cachorro; Ángel Máximo De Frutos Baraja

Analysis of Daytime and Night-Time Aerosol Optical Depth from Solar and Lunar Photometry in Valladolid (Spain) Journal Article

In: Remote Sensing, vol. 15, no. 22, 2023, ISSN: 2072-4292.

Abstract | Links | BibTeX

@article{rs15225362,

title = {Analysis of Daytime and Night-Time Aerosol Optical Depth from Solar and Lunar Photometry in Valladolid (Spain)},

author = {Celia Herrero del Barrio and David Mateos and Roberto Román and Ramiro González and Sara Herrero-Anta and Daniel González-Fernández and Abel Calle and Carlos Toledano and Victoria Eugenia Cachorro and Ángel Máximo De Frutos Baraja},

url = {https://www.mdpi.com/2072-4292/15/22/5362},

doi = {10.3390/rs15225362},

issn = {2072-4292},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Remote Sensing},

volume = {15},

number = {22},

abstract = {Aerosol optical depth (AOD) at night-time has become a hot topic in recent years due to the development of new instruments recording accurate ground-based lunar irradiance measurements, and the development of calibration methods and extraterrestrial irradiance models adapted to lunar photometry. This study uses all daytime and night-time AOD data available at Valladolid (Spain) from October 2016 to March 2022 in order to analyze its behavior and the added contribution of night data. The annual, monthly and daily AOD evolution is studied comparing daytime and night-time values and checking the correlation between them. For this purpose, the daily averages are computed, showing an annual pattern, with low AOD values throughout the year (mean value of AOD at 440 nm: 0.122), where winter months have the lower and summer the higher values, as observed in previous studies. All these AOD values are modulated by frequent desert dust events over the Iberian Peninsula, with a strong influence on daily and monthly mean values in February and March, where the strongest desert outbreaks occurred. The added new data confirm these results and the good correlation between daytime and night-time data. Also, a complete daily evolution is shown, observing that AOD and Ångström exponent (AE) mean values vary by only ±0.02 in 24 h, with a maximum value at 06:00 UTC and minimum at 18:00 UTC for both parameters.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

2022

R. Román; D. González-Fernández; C. Toledano; C. Emde; V. Cachorro; D. Mateos; S. Herrero-Anta; J. C. Antuña-Sánchez; R. González; J.C. Antuña-Marrero; B. Mayer; A. Calle; A.M. de Frutos

Impact of clouds on cloud-free sky radiances in a partially cloudy scenario Conference

International Radiation Symposium Thessaloniki, Greece, 2022.

D. Mateos; S. Herrero; R. Román; C. Ritter; J.C. Antuña-Sanchez; D. Ruiz-Ramos; D. González-Fernández; R. González; J.C. Antuña-Marrero; C. Toledano; V.E. Cachorro; A. Calle; A.M. de Frutos

Aerosol Radiative Effect in the European Arctic Under High Turbidity Conditions in the Period 2017-2021 by Sun/Lunar Photometry Conference

International Radiation Symposium Thessaloniki, Greece, 2022.

A. Calle; P. Martín; C. Toledano; R. González; R. Román; D. Mateos; V. Cachorro; S. Herrero; J.C. Antuña-Marrero; D. González-Fernández; A.M. de Frutos

Caracterización del espesor óptico de aerosoles en latitudes árticas y antárticas Conference

XIX Congreso de la Asociación Española de Teledetección Pamplona, Spain, 2022.

Antuña Marrero, J.C.; Mann, G.; Barnes, J.; Shallcross, S.; Dhomse, S.; Calle, A.; Cachorro, V. E.; Deshler, T.; Zhengyao, L.; Sharma, N.

Recovering lost or forgotten stratospheric lidar and searchlight datasets to provide new constraints for stratospheric change and volcanic impacts Conference

3rd International Workshop on Stratospheric Sulfur and its Role in Climate (SSiRC) Leeds, United Kingdom, 2022.

Juan Carlos Antuña-Marrero; Roberto Román; Victoria E. Cachorro; David Mateos; Carlos Toledano; Abel Calle; Juan Carlos Antuña-Sánchez; Javier Vaquero-Martínez; Manuel Antón; Ángel M. Frutos Baraja

Integrated water vapor over the Arctic: Comparison between radiosondes and sun photometer observations Journal Article

In: Atmospheric Research, vol. 270, pp. 106059, 2022, ISSN: 0169-8095.

Abstract | Links | BibTeX

@article{Antuña-Marrero2022,

title = {Integrated water vapor over the Arctic: Comparison between radiosondes and sun photometer observations},

author = {Juan Carlos Antuña-Marrero and Roberto Román and Victoria E. Cachorro and David Mateos and Carlos Toledano and Abel Calle and Juan Carlos Antuña-Sánchez and Javier Vaquero-Martínez and Manuel Antón and Ángel M. Frutos Baraja},

url = {https://www.sciencedirect.com/science/article/pii/S016980952200045X},

doi = {https://doi.org/10.1016/j.atmosres.2022.106059},

issn = {0169-8095},

year = {2022},

date = {2022-02-02},

urldate = {2022-01-01},

journal = {Atmospheric Research},

volume = {270},

pages = {106059},

abstract = {The amplification of global warming because of the feedbacks associated with the increase in atmospheric moisture and the decrease in sea ice and snow cover in the Arctic is currently the focus of scientists, policy makers and society. The amplification of global warming is the response to increases in precipitation originally caused by climate change. Arctic predominant increases in specific humidity and precipitation have been documented by observations. In comparison, evapotranspiration in the Arctic is poorly known, in part, because the spatial and temporal sparsity of accurate in situ and remote sensing observations. Although more than 20 observations sites in the Arctic are available, where AERONET sun photometer integrated water vapor (IWV) measurements have been conducted, that information have been barely used. Here, we present a comparison of IWV observations from radiosondes and AERONET sun photometers at ten sites located across the Arctic with the goal to document the feasibility of that set of observations to contribute to the ongoing and future research on polar regions. Sun photometer IWV observations are averaged for three-time windows; 30 min, 6 and 24 h. The predominant dry bias of AERONET IWV observations with respect to radiosondes, identified at tropical and midlatitudes, is also present in the Arctic. The statistics of the comparison show robust results at eight of the ten sites, with precision and accuracy magnitudes below 8 and 2% respectively. The possible causes of the less robust results at the other two sites are discussed. In addition, the impact of selecting other temporal coincidence windows in the average sun photometer IWV used in the comparison were tested. Auto-correlation in diurnal sun photometer IWV could produce appreciable bias in the statistics used for the comparison. We suggest using only one pair of values per day, consisting in the daily mean IWV sun photometer and the IWV radiosonde observation value. This feature should be valid also for comparison of IWV from sun photometer and other instruments. Maximum 10% error level of IWV from sun photometer observations, when compared with radiosondes, have been found for the Arctic. It is in the same order of magnitude than at tropical and middle latitudes locations. It has been demonstrated the feasibility of AERONET IWV observations in the Arctic for research on this variable. AERONET standard instruments and its centralized-standard processing algorithm allow its IWV observations to be considered a relative standard dataset for the re-calibration of other instrumental IWV observations assuming radiosondes as the absolute standard dataset.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

The amplification of global warming because of the feedbacks associated with the increase in atmospheric moisture and the decrease in sea ice and snow cover in the Arctic is currently the focus of scientists, policy makers and society. The amplification of global warming is the response to increases in precipitation originally caused by climate change. Arctic predominant increases in specific humidity and precipitation have been documented by observations. In comparison, evapotranspiration in the Arctic is poorly known, in part, because the spatial and temporal sparsity of accurate in situ and remote sensing observations. Although more than 20 observations sites in the Arctic are available, where AERONET sun photometer integrated water vapor (IWV) measurements have been conducted, that information have been barely used. Here, we present a comparison of IWV observations from radiosondes and AERONET sun photometers at ten sites located across the Arctic with the goal to document the feasibility of that set of observations to contribute to the ongoing and future research on polar regions. Sun photometer IWV observations are averaged for three-time windows; 30 min, 6 and 24 h. The predominant dry bias of AERONET IWV observations with respect to radiosondes, identified at tropical and midlatitudes, is also present in the Arctic. The statistics of the comparison show robust results at eight of the ten sites, with precision and accuracy magnitudes below 8 and 2% respectively. The possible causes of the less robust results at the other two sites are discussed. In addition, the impact of selecting other temporal coincidence windows in the average sun photometer IWV used in the comparison were tested. Auto-correlation in diurnal sun photometer IWV could produce appreciable bias in the statistics used for the comparison. We suggest using only one pair of values per day, consisting in the daily mean IWV sun photometer and the IWV radiosonde observation value. This feature should be valid also for comparison of IWV from sun photometer and other instruments. Maximum 10% error level of IWV from sun photometer observations, when compared with radiosondes, have been found for the Arctic. It is in the same order of magnitude than at tropical and middle latitudes locations. It has been demonstrated the feasibility of AERONET IWV observations in the Arctic for research on this variable. AERONET standard instruments and its centralized-standard processing algorithm allow its IWV observations to be considered a relative standard dataset for the re-calibration of other instrumental IWV observations assuming radiosondes as the absolute standard dataset.

2021

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.

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.

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.

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

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

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

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

@conference{González2021b,

title = {Monitoring of long-range transported smoke in polar regions with remote sensing instruments},

author = {R. González and C. Toledano and R. Román and D. Mateos and E. Asmi and E. Rodríguez and J.C. Antuña-Sánchez and S. Herrero-Anta and V.E. Cachorro and A. Calle and A.M. de Frutos},

year  = {2021},

date = {2021-03-26},

booktitle = {Arctic Science Summit Week 2021 (ASSW2021)},

address = {Lisbon, Portugal (online)},

organization = {International Arctic Science Committee (IASC)},

abstract = {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.},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}

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

@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 = {},

pubstate = {published},

tppubtype = {article}

}

2020

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.

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

Daytime and nighttime aerosol optical depth implementation in CÆLIS Journal Article

In: Geoscientific Instrumentation, Methods and Data Systems, vol. 9, no. 2, pp. 417–433, 2020.

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

Characterization of Stratospheric Smoke Particles over the Antarctica by Remote Sensing Instruments Journal Article

In: Remote Sensing, vol. 12, no. 22, 2020, ISSN: 2072-4292.

Abstract | Links | BibTeX

2019

R. Román; J.C. Antuña-Sánchez; J. Vaquero-Martínez; R. González; C. Velasco-Merino; P. Martín; M. Antón; C. Toledano; V.E. Cachorro; A. Calle; A de Frutos

Vapor de agua y cubierta de nubes sobre las zonas polares a través del instrumento AIRS Conference

XVIII Congreso de la Asociación Española de Teledetección, Asociación Española de Teledetección Valladolid, Spain, 2019.

D. Mateos; R. González; D. Fuertes; C. Velasco-Merino; J.C. Antuña-Sánchez; R. Román; P. Martín; C. Toledano; V.E. Cachorro; A. Calle; A.M. de Frutos

Distribución espacial de propiedades del aerosol mediante el software CAELIS Conference

XVIII Congreso de la Asociación Española de Teledetección, Asociación Española de Teledetección Valladolid, Spain, 2019.

C. Velasco-Merino; D. Mateos; C. Toledano; V.E; Cachorro; R. González; S. Blindheim; M. Gausa; S. Mogo; C. Guirado; R. Román; J.C. Antuña; M. Herreras; A. Calle; A.M. de Frutos

Aerosol radiative properties in a pristine subartic area using long-term columnar records Conference

7th Iberian Meeting on Aerosol Science and Technology (RICTA'19) Lisbon, Portugal, 2019.

D. Mateos; C. Toledano; R. Román; C. Velasco-Merino; R. González; J.C. Antuña; C. Guirado; C. Ritter; V.E. Cachorro; A. Calle; A.M. De Frutos

Columnar aerosol properties in the Arctic: emphasis in nocturnal photometry Conference

The SSC16 conference, Scandinavian Symposium on Chemometrics Oslo, Norway, 2019.

2018

D. Mateos; V. E. Cachorro; S. Mogo; C. Toledano; C. Velasco-Merino; R. González; A. Berjón; C. Guirado; R. Román; J. C. Antuña; M. Herreras; E. Rodríguez; E. Asmi; A. Calle; A. M. de Frutos

Research on aerosols, clouds, and water vapour in Polar Regions Conference

10th Portuguese Conference on Polar Sciences , University of Aveiro Portugal, 2018.

Cachorro, Victoria; Mateos, David; Toledano, Carlos; Velasco-Merino, Cristian; González, Ramiro; Berjón, Alberto; Guirado, Carmen; Román, Roberto; Antuña, Juan Carlos; Herreras, Marcos; Calle, Abel; de Frutos, Ángel Máximo

Observación atmosférica en zonas polares llevada a cabo por el grupo GOA-Uva Conference

SCAR, CSIC, IGME Madrid, Spain, 2018, (IX Simposio Español de Estudios Polares).

C. Toledano; M. Gausa; C. Velasco; S. Blindheim; R. Román; I. Hanssen; D. Mateos; M. Herreras; R. González; A. Calle; V. E. Cachorro; A. M. de Frutos

Sun photometer and lidar collocated aerosol measurements at ALOMAR: a long-term comparison Conference

ISF Kiruna, Sweden, 2018, (45th Annual European Meeting on Atmospheric Studies by Optical Methods).

A. Calle; D. Mateos; V.E. Cachorro; C. Toledano; C. Velasco-Merino; A. López; R. González; A. de Frutos; J.C. Antuña; R. Román

Aerosol optical depth characterization in middle and polar latitudes Conference

International Geoscience and Remote Sensing Symposium (IGARSS) Valencia, Spain, 2018.

Velasco-Merino Cristian, Mateos David, Toledano Carlos, Prospero Joseph M., Molinie Jack, Euphrasie-Clotilde Lovely, González Ramiro, Cachorro Victoria E., Calle Abel, Frutos Angel M. de

Impact of long-range transport over the Atlantic Ocean on Saharan dust optical and microphysical properties based on AERONET data Conference

ESCUELA POLITÉCNICA FEDERAL DE LAUSANA LA HABANA, CUBA, 2018, (CONFERENCIA INTERNACIONAL SOBRE LA GESTIÓN DE ENERGÍA, CLIMA Y AIRE PARA UNA SOCIEDAD SOSTENIBLE).

C. Velasco-Merino, D. Mateos, M. Herreras, C. Toledano, A. Calle, R. González, A. Berjón, C. Guirado, R. Román, J. C. Antuña, V. E. Cachorro,; A. M. de Frutos

Radiometric and photometric measurements (solar and lunar) in the A-LIFE field campaign in Cyprus Conference

UNIVERSIDAD DEL PAIS VASCO 2018, (REUNIÓN IBÉRICA DE CIENCIA Y TECNOLOGÍA DE AEROSOLES).

D. Mateos; V. E. Cachorro; C. Toledano; C. Velasco-Merino; R. González; A. Berjón; C. Guirado; R. Román; J. C. Antuña; M. Herreras; A. Calle; A. M. de Frutos

Atmospheric observation in Polar Regions carried out by GOA-UVa Conference

6th Iberian Meeting on Aerosol Science and Technology (RICTA2018), University of the Basque Country (UPV/EHU) Bilbao, Spain, 2018.

D. Mateos, C. Velasco-Merino, V. E. Cachorro, C. Ritter, S. Mogo, C. Toledano, R. Neuber, R. Gonzalez, M. Herreras, A, Calle, A. M. de Frutos

Columnar aerosol observations by sun-sky-lunar photometry in Ny-Alesund (79ºN) Conference

Scientific Committee on Antarctic Research SCAR and the International Arctic Science Committee IASC. Davos, 2018, (XXXV SCAR Biennial Meetings Arctic Science Summit Week 2018 & IASC Business Meetings SCAR/IASC Open Science Conference 2018 Arctic Observing Summit).

Cristian Velasco-Merino, David Mateos, Carlos Toledano, Joseph M. Prospero, Jack Molinie, Lovely Euphrasie-Clotilde, Ramiro González, Victoria E. Cachorro, Abel Calle, Angel M. de Frutos

Changes of optical and microphysical Saharan dust properties caused by long-range transport over the Atlantic Ocean Conference

IZAÑA ATMOSPHERIC RESEARCH CENTRE – AEMET LA LAGUNA, CANARIAS, ESPAÑA, 2018, (THE 9TH INTERNATIONAL WORKSHOP ON SAND / DUST STORM AND ASSOCIATED DUSTFALL).

C. Velasco-Merino; D. Mateos; C. Toledano; J. M. Prospero; J. Molinie; L. Euphrasie-Clotilde; R. González; V. E. Cachorro; A. Calle; A. M. de Frutos

Impact of long-range transport over the Atlantic Ocean on Saharan dust optical and microphysical properties based on AERONET data Journal Article

In: Atmospheric Chemistry and Physics, vol. 18, no. 13, pp. 9411–9424, 2018.

M.A. BURGOS, D. MATEOS, V. E. CACHORRO, C. TOLEDANO, A.M. DE FRUTOS, A. CALLE, A. HERGUEDAS, J.L. MARCOS

An analisys of fine aerosol loading episodes in north central Spain in the summer 2013- Impact of Canadian biomass burning episode and local emissions. Journal Article

In: Atmospheric Environment, vol. 2018, no. 184, pp. 191-202, 2018.

Calle, A. ;Cachorro, V.E. ;Toledano, C. ;Velasco, C. ;Benito, A. ;González, R. ;de Frutos, A.M. ;Antuña-Sánchez, J.C. ;Román, R.

Aerosol optical depth characterization in middle and polar latitudes Proceedings Article

In: IGARSS 2018-2018 IEEE International Geoscience and Remote Sensing Symposium. , pp. 9138 - 9140, 2018, ISBN: 978-1-5386-7150-4.

2017

V. E. Cachorro; D. Mateos; C. Velasco-Merino; S. Mogo; C. Ritter; C. Toledano; R. Neuber; R. González; M. Herreras; A. Calle; A.M. de Frutos

Starting long-term aerosol observations in the Arctic Ny-Ålesund base (Svalbard, 79ºN) by a sun-sky-lunar photometer Conference

Universidade Beira Interior Covilhã, Portugal, 2017, (9th Portuguese Polar Sciences Conference).

Víctor Molina García; Adrian Doicu; Abel Calle Montes; Diego Loyola

Extracción de propiedades ópticas de nubes mediante imágenes DSCOVR-EPIC: modelo de transferencia radiativa y algoritmo de inversión Conference

Asociación Española de Teledetección Murcia, España, 2017, (XVII Congreso de la Asociación Española de Teledetección).

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