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DOI10.5194/acp-20-6749-2020
Remote sensing of two exceptional winter aerosol pollution events and representativeness of ground-based measurements
Baron, Alexandre; Chazette, Patrick; Totems, Julien
2020-06-09
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2020
卷号20期号:11页码:6749-6768
文章类型Article
语种英语
国家France
英文摘要

Two intense winter aerosol pollution events, which took place in winter 2016-2017 in Paris, were monitored using a ground-based N-2-Raman lidar, in the framework of WASLIP (Winter Aerosol Survey by Lidar In Paris), a dedicated field campaign that was carried out in this area from 1 November 2016 to 31 January 2017. The data analysis uses the synergy between ground-based and spaceborne lidar observations and data from the air quality monitoring network Airparif. The first severe aerosol pollution event began on 30 November 2016 and ended on 2 December, concerning a circular area of similar to 250 km in diameter around Paris. The maximum PM10 was 121 +/- 63 mu g m(-3) (regional spatial average +/- SD) for the Airparif ground-based PM monitoring stations, and the aerosol extinction coefficient (AEC) ranged from 0.2 to 1 km(-1). The second event took place from 20 to 23 January which covered all of the northwestern Europe, with maxima of PM10 around 156 +/- 33 mu g m(-3) and AEC between 0.6 and 1 km(-1), within the winter atmospheric boundary layer. Although these two major aerosol pollution events did not occur under identical anticyclonic weather conditions, they share very low planetary boundary layer (PBL) heights, down to 300 m above ground level. Moreover, they are associated with significantly different aerosol lidar ratios: 72 +/- 15 and 56 +/- 15 sr, respectively in December and January. Such results are consistent with available spaceborne lidar data, 70 +/- 25 sr from CALIOP (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations), and values found in the literature. During these two events, the continuous temporal evolution of the aerosol extinction coefficient allows us to investigate the representativeness of optical parameters found in the planetary boundary layer to assess surface aerosol concentration. No one-to-one relationship between the aerosol optical thickness (AOT) and PM2.5 values stands out within our study. In contrast, the maximum aerosol extinction coefficient found within the planetary boundary layer correlates well with PM2.5 at the ground (R-2 similar to 0.75, specific extinction cross section of 9.4 m(2) g(-1)) for these polluted events. Thus this lidar-derived aerosol extinction co-efficient is identified as a consistent variable to monitor the pollution during winter events.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000541473000001
WOS关键词PARTICULATE MATTER ; OPTICAL-PROPERTIES ; IN-SITU ; GEOGRAPHICAL ORIGINS ; CHEMICAL-COMPOSITION ; LIDAR OBSERVATIONS ; FINE AEROSOLS ; PARIS AREA ; RETRIEVAL ; MODIS
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/274340
专题地球科学
作者单位Univ Paris Saclay, Lab Sci Climat & Environm, CNRS, CEA,UVSQ, F-91191 Gif Sur Yvette, France
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Baron, Alexandre,Chazette, Patrick,Totems, Julien. Remote sensing of two exceptional winter aerosol pollution events and representativeness of ground-based measurements[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(11):6749-6768.
APA Baron, Alexandre,Chazette, Patrick,&Totems, Julien.(2020).Remote sensing of two exceptional winter aerosol pollution events and representativeness of ground-based measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(11),6749-6768.
MLA Baron, Alexandre,et al."Remote sensing of two exceptional winter aerosol pollution events and representativeness of ground-based measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.11(2020):6749-6768.
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