气候变化领域集成服务门户(CCPortal): Aerosol optical properties derived from POLDER-3/PARASOL (2005-2013) over the Western Mediterranean Sea - Part 2: Spatial distribution and temporal variability

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DOI	10.5194/acp-21-12715-2021
	Aerosol optical properties derived from POLDER-3/PARASOL (2005-2013) over the Western Mediterranean Sea - Part 2: Spatial distribution and temporal variability
	Chiapello I.; Formenti P.; Mbemba Kabuiku L.; Ducos F.; Tanré D.; Dulac F.
发表日期	2021
ISSN	1680-7316
起始页码	12715
结束页码	12737
卷号	21 期号:16
英文摘要	The Mediterranean atmosphere is impacted by a variety of natural and anthropogenic aerosols which exert a complex and variable pressure on the regional climate and air quality. This study focuses on the Western Mediterranean Sea (west of longitude 20g g€¯E) using the full POLarization and Directionality of the Earth's Reflectances version 3 (POLDER-3)/Polarization & Anisotropy of Reflectances for Atmospheric Sciences coupled with Observations from a Lidar (PARASOL) aerosol data record derived from the operational clear-sky ocean algorithm (collection 3) available from March 2005 to October 2013. This 8.5-year satellite data set includes retrievals at 865g€¯nm of the total, fine-, and coarse-mode aerosol optical depth (AOD, AODF, and AODC, respectively), Ångström exponent (AE), and the spherical/non-spherical partition of the coarse-mode AOD (AODCS and AODCNS, respectively), that have been carefully validated over the study region (Formenti et al., 2018). Here, we analyze the spatial distribution, the seasonal cycle, and interannual variability of this ensemble of advanced aerosol products in three latitude bands (34-38, 38-42, and >g€¯42g g€¯N) and for three sites (Ersa, Barcelona, Lampedusa) distributed on the western basin. POLDER-3 retrieves the high influence of north African desert dust over the region, which largely controls the spatial distributions (south-to-north decreasing gradient) and seasonal cycles (spring/summer maximum) of both AOD and coarse AOD, including its non-spherical component. In contrast, the coarse spherical component of AOD remains relatively homogenously low all year long over the region, whereas fine-mode AODs are generally more elevated in the eastern part of the region of study, especially north of the Adriatic Sea. From 2005 to 2013, annual POLDER-3 AOD evolution shows a decreasing trend of 0.0030g€¯yr-1 in absolute value at 865g€¯nm (0.0060g€¯yr-1 at 550g€¯nm). Such a downward evolution is much more pronounced and spatially extended for AODF (-0.0020g€¯yr-1 at 865g€¯nm) than for AODC. Our analysis also suggests that the North Atlantic Oscillation (NAO) index explains a significant part of the interannual variability of POLDER-3 AODC, reflecting its role on the frequency of Saharan dust transport over the region. Finally, the POLDER-3 data set highlights an improvement of air quality related to the fine aerosol component, with a marked evolution toward more frequent occurrence of clean conditions (≥g€¯75g€¯% of daily AODF-865g€¯nm<0.05) at the end of the period of study (2010-2013) over most of the Western Mediterranean Sea, and much less evidence of such a large-scale evolution for the coarse fraction. Therefore, despite the high and variable influence of mostly natural north African dust over the region, the POLDER-3 advanced aerosol data set appears sufficiently accurate to successfully resolve the concurrent downward trend of fine, primarily anthropogenic particles, most likely related to reduced emissions in the surrounding European countries. © 2021 The Author(s).
语种	英语
scopus关键词	aerosol; optical property; PARASOL; POLDER; spatial distribution; temporal variation; Mediterranean Sea; Mediterranean Sea (West)
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246628
作者单位	Univ. Lille, CNRS, UMR 8518 - LOA - Laboratoire d'Optique Atmosphérique, Lille, 59000, France; Université de Paris and Paris Est Créteil, CNRS, LISA, Paris, 75013, France; LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
推荐引用方式 GB/T 7714	Chiapello I.,Formenti P.,Mbemba Kabuiku L.,et al. Aerosol optical properties derived from POLDER-3/PARASOL (2005-2013) over the Western Mediterranean Sea - Part 2: Spatial distribution and temporal variability[J],2021,21(16).
APA	Chiapello I.,Formenti P.,Mbemba Kabuiku L.,Ducos F.,Tanré D.,&Dulac F..(2021).Aerosol optical properties derived from POLDER-3/PARASOL (2005-2013) over the Western Mediterranean Sea - Part 2: Spatial distribution and temporal variability.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(16).
MLA	Chiapello I.,et al."Aerosol optical properties derived from POLDER-3/PARASOL (2005-2013) over the Western Mediterranean Sea - Part 2: Spatial distribution and temporal variability".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.16(2021).