Different strategies to retrieve aerosol properties at night-time with the GRASP algorithm
Metadatos
Afficher la notice complèteAuteur
Benavent Oltra, José Antonio; Casquero Vera, Juan Andrés; Pérez Ramírez, Daniel; Lyamani, H.; Ortiz-Amezcua, Pablo; Guerrero Rascado, Juan Luis; Olmo Reyes, Francisco José; Alados Arboledas, LucasEditorial
European Geosciences Union
Date
2019-11-22Referencia bibliográfica
Benavent-Oltra, J. A., Román, R., Casquero-Vera, J. A., Pérez-Ramírez, D., Lyamani, H., Ortiz-Amezcua, P., ... & Fuertes, D. (2019). Different strategies to retrieve aerosol properties at night-time with the GRASP algorithm. Atmospheric Chemistry and Physics, 19(22), 14149-14171.
Patrocinador
This research has been supported by the European Union through the H2020 programme (ACTRIS-2, grant no. 654109) and the Spanish Ministry of Economy and Competitiveness (projects CMT2015-66742-R, CGL2016-81092- R, CGL2017-85344-R, RTI2018-097864-B-I00 and CGL2017- 90884-REDT).Résumé
This study evaluates the potential of the GRASP
algorithm (Generalized Retrieval of Aerosol and Surface
Properties) to retrieve continuous day-to-night aerosol properties,
both column-integrated and vertically resolved. The
study is focused on the evaluation of GRASP retrievals
during an intense Saharan dust event that occurred during
the Sierra Nevada Lidar aerOsol Profiling Experiment I
(SLOPE I) field campaign. For daytime aerosol retrievals,
we combined the measurements of the ground-based lidar
from EARLINET (European Aerosol Research Lidar
Network) station and sun–sky photometer from AERONET
(Aerosol Robotic Network), both instruments co-located in
Granada (Spain). However, for night-time retrievals three
different combinations of active and passive remote-sensing
measurements are proposed. The first scheme (N0) uses lidar
night-time measurements in combination with the interpolation
of sun–sky daytime measurements. The other two
schemes combine lidar night-time measurements with nighttime
aerosol optical depth obtained by lunar photometry either
using intensive properties of the aerosol retrieved during
sun–sky daytime measurements (N1) or using the Moon aureole
radiance obtained by sky camera images (N2).