Title :

Aerosol optical properties derived from polder-3/parasol (2005-2013) over the western mediterranean sea - part 1: quality assessment with aeronet and in situ airborne observations

Author(s) :

Formenti, Paola [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Kabuiku, Lydie Mbemba [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Agence de l'Environnement et de la Maîtrise de l'Énergie [ADEME]
Chiapello, Isabelle [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Ducos, Fabrice [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Dulac, Francois [Auteur]
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
Tanre, Didier [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]

Journal title :

Atmospheric Measurement Techniques

Abbreviated title :

Atmos. Meas. Tech.

Volume number :

11

Publication date :

2018-12-20

ISSN :

1867-1381

HAL domain(s) :

Physique [physics]

English abstract : [en]

The western Mediterranean atmosphere is impacted by a variety of aerosol sources, producing a complex and variable mixture of natural and anthropogenic particles, with different chemical and physical properties. Satellite ...
Show more >The western Mediterranean atmosphere is impacted by a variety of aerosol sources, producing a complex and variable mixture of natural and anthropogenic particles, with different chemical and physical properties. Satellite sensors provide a useful global coverage of aerosol parameters but through indirect measurements that require careful validation. Here we present the results of a long-term regional scale analysis of the full dataset (March 2005 and October 2013) of POLDER-3/PARASOL ocean operational retrievals of the total, fine, and coarse aerosol optical depth (AOD, AODF, and AODC), Ångström exponent (AE), and the spherical or non-spherical partition of coarse-mode AOD (AODCS and AODCNS), respectively. The evaluation is performed using data from 17 coastal and insular ground-based AERONET sites on one side, and airborne vertical profiles of aerosol extinction and number size distribution obtained by the SAFIRE ATR-42 aircraft operated in the area during summer 2012 and 2013 on the other side. This study provides the first regional evaluation of uncertainties of the POLDER-3 products, and highlights their quality. The POLDER-3 Ångström exponent, representing AOD spectral dependence in link with the aerosol particle size distribution, is biased towards small values. This bias, however, does not prevent using AE for classifying the regional aerosol laden air masses. AODF corresponds to particles smaller than 0.6–0.8 µm in diameter and appears suitable to monitor the aerosol submicron fraction from space. We also provide an original validation of POLDER-3 AODC and its spherical or non-spherical partition, which shows agreement within 25 % with AERONET shape retrievals when the aerosol coarse fraction dominates.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Université de Lille

Collections :

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

Submission date :

2024-01-30T11:45:48Z
2024-02-26T09:44:22Z