Titre :

Different strategies to retrieve aerosol properties at night-time with the grasp algorithm

Auteur(s) :

Antonio Benave, Oltra Jose [Auteur]
Department Applied Physics [Granada]
Departamento de Fisica Aplicada [Granada]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Roman, Roberto [Auteur]
Universidad de Valladolid [Valladolid] [UVa]
Andres Casque,ro-Vera Juan [Auteur]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Perez-Ramirez, Daniel [Auteur]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Lyamani, Hassan [Auteur]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Universidad de Granada = University of Granada [UGR]
Ortiz-Amezcua, Pablo [Auteur]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Esteban Bedoya-V,elasquez Andres [Auteur]
Universidad Nacional de Colombia Sede Medellín
De Arru,da Moreira Gregori [Auteur]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Instituto de Pesquisas Energéticas e Nucleares [São Paulo] [IPEN/CNEN-SP]
Barreto, Africa [Auteur]
Agencia Estatal de Meteorología [AEMet]
Izaña Atmospheric Research Center [IARC]
Universidad de Valladolid [Valladolid] [UVa]
Lopatin, Anton [Auteur]
Université de Lille
Fuertes, David [Auteur]
Université de Lille
Herrera, Milagros [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Torres, Benjamin [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Doubovik, Oleg [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Luis Guerrero-Ra,scado Juan [Auteur]
Goloub, Philippe [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Jose Olmo-,reyes Francisco [Auteur]
Alados-Arboledas, Lucas [Auteur]
Department Applied Physics [Granada]
Departamento de Fisica Aplicada [Granada]
Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia [IISTA-CEAMA]
Universidad de Granada = University of Granada [UGR]

Titre de la revue :

Atmospheric Chemistry and Physics

Nom court de la revue :

Atmos. Chem. Phys.

Numéro :

19

Date de publication :

2019-11-22

ISSN :

1680-7316

Discipline(s) HAL :

Physique [physics]

Résumé en anglais : [en]

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. ...
Lire la suite >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 night-time 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). Evaluations of the columnar aerosol properties retrieved by GRASP are done versus standard AERONET retrievals. The coherence of day-to-night evolutions of the different aerosol properties retrieved by GRASP is also studied. The extinction coefficient vertical profiles retrieved by GRASP are compared with the profiles calculated by the Raman technique at night-time with differences below 30 % for all schemes at 355, 532 and 1064 nm. Finally, the volume concentration and scattering coefficient retrieved by GRASP at 2500 m a.s.l. are evaluated by in situ measurements at this height at Sierra Nevada Station. The differences between GRASP and in situ measurements are similar for the different schemes, with differences below 30 % for both volume concentration and scattering coefficient. In general, for the scattering coefficient, the GRASP N0 and N1 show better results than the GRASP N2 schemes, while for volume concentration, GRASP N2 shows the lowest differences against in situ measurements (around 10 %) for high aerosol optical depth values.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Université de Lille

Collections :

• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Date de dépôt :

2024-01-30T11:45:42Z
2024-02-26T14:33:39Z