Titre :

Spatial distribution of aerosol microphysical and optical properties and direct radiative effect from the china aerosol remote sensing network

Auteur(s) :

Che, Huizheng [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Xia, Xiangao [Auteur]
Institute of Atmospheric Physics [Beijing] [IAP]
University of Chinese Academy of Sciences [Beijing] [UCAS]
Zhao, Hujia [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Institute of Atmospheric Environment, Shenyang, China
Doubovik, Oleg [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Holben, Brent N. [Auteur]
NASA Goddard Space Flight Center [GSFC]
Goloub, Philippe [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Cuevas-Agullo, Emilio [Auteur]
Centro de Investigación Atmosférica de Izaña [Santa-Cruz de Tenerife] [CIAI]
Estelles, Victor [Auteur]
Universitat de València = University of Valencia [UV]
Wang, Yaqiang [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Zhu, Jun [Auteur]
Nanjing University of Information Science and Technology [NUIST]
Qi, Bing [Auteur]
Gong, Wei [Auteur]
Wuhan University [China]
Yang, Honglong [Auteur]
Zhang, Renjian [Auteur]
Institute of Atmospheric Physics [Beijing] [IAP]
Yang, Leiku [Auteur]
Henan Polytechnic University
Chen, Jing [Auteur]
Wang, Hong [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Zheng, Yu [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Gui, Ke [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]
Zhang, Xiaochun [Auteur]
Zhang, Xiaoye [Auteur]
Chinese Academy of Meteorological Sciences [CAMS]

Titre de la revue :

Atmospheric Chemistry and Physics Discussions

Nom court de la revue :

Atmos. Chem. Phys.

Numéro :

19

Date de publication :

2019-09-24

ISSN :

1680-7316

Discipline(s) HAL :

Physique [physics]

Résumé en anglais : [en]

Multi-year observations of aerosol microphysical and optical properties, obtained through ground-based remote sensing at 50 China Aerosol Remote Sensing Network (CARSNET) sites, were used to characterize the aerosol ...
Lire la suite >Multi-year observations of aerosol microphysical and optical properties, obtained through ground-based remote sensing at 50 China Aerosol Remote Sensing Network (CARSNET) sites, were used to characterize the aerosol cli-matology for representative remote, rural, and urban areas over China to assess effects on climate. The annual mean effective radii for total particles (R effT) decreased from north to south and from rural to urban sites, and high total particle volumes were found at the urban sites. The aerosol optical depth at 440 nm (AOD 440 nm) increased from remote and rural sites (0.12) to urban sites (0.79), and the extinction Ångström exponent (EAE 440-870 nm) increased from 0.71 at the arid and semi-arid sites to 1.15 at the urban sites, presumably due to anthropogenic emissions. Single-scattering albedo (SSA 440 nm) ranged from 0.88 to 0.92, indicating slightly to strongly absorbing aerosols. Absorption AOD 440 nm values were 0.01 at the remote sites versus 0.07 at the urban sites. The average direct aerosol radiative ef-Published by Copernicus Publications on behalf of the European Geosciences Union. 11844 H. Che et al.: Ground-based AOP and direct radiative efect from CARSNET fect (DARE) at the bottom of atmosphere increased from the sites in the remote areas (−24.40 W m −2) to the urban areas (−103.28 W m −2), indicating increased cooling at the latter. The DARE for the top of the atmosphere increased from −4.79 W m −2 at the remote sites to −30.05 W m −2 at the urban sites, indicating overall cooling effects for the Earth-atmosphere system. A classification method based on SSA 440 nm , fine-mode fraction (FMF), and EAE 440-870 nm showed that coarse-mode particles (mainly dust) were dominant at the rural sites near the northwestern deserts, while light-absorbing, fine-mode particles were important at most urban sites. This study will be important for understanding aerosol climate effects and regional environmental pollution, and the results will provide useful information for satellite validation and the improvement of climate modelling.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Université de Lille

Collections :

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

Date de dépôt :

2024-01-30T11:45:43Z
2024-02-26T11:34:34Z