Arid
DOI10.1016/j.atmosenv.2015.05.048
Characterizing a persistent Asian dust transport event: Optical properties and impact on air quality through the ground-based and satellite measurements over Nanjing, China
Han, Yong1; Wu, Yonghua2; Wang, Tijian1; Xie, Chenbo3; Zhao, Kun1; Zhuang, Bingliang1; Li, Shu1
通讯作者Wu, Yonghua
来源期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
出版年2015
卷号115页码:304-316
英文摘要

The optical properties, time-height distribution and impact on the local air quality from a heavy Asian dust transport episode are investigated with a synergistic ground-based, satellite sensors and transport model on 1 May, 2011 at Nanjing (32.05 degrees N, 118.78 degrees E, and 94 m ASL) in southeast China. Two dust layers located in the planetary-boundary-layer (PBL, <2.5 km) and free troposphere (3-6 km) are observed by a Polarization Raman-Mie Lidar, with the lower one originating from the Gobi deserts and the higher one from the Taklimakan deserts. The dust aerosol layer shows the depolarization ratios at 0.1-0.2 and strong extinction coefficients of 1.0 km(-1) at 532-nm, while the extinction-to-backscatter ratios (e.g. lidar ratios) of dust are 47.3-55 sr below 2.5 km. During this dust intrusion period, the aerosol optical depths (AOD) dramatically increase from 0.7 to 1.6 at 500-nm whereas the Angstrom exponents decrease from 1.2 to 0.2. Meanwhile, surface PMio and PM2.5 concentrations show a significant and coincident increase with the peak value reaching 767 mu g/m(3) and 222 mu g/m(3), respectively, indicating the mixture of dust with the anthropogenic aerosols. Regional influences of the transported dust in east China are further illustrated by the AERONET-sunphotometer at Taihu and Xianghe sites (downwind and upwind from Nanjing), satellites MODIS, CALIFSO and model products. Furthermore, the model product of dust profile and surface concentration are evaluated with the ground-based and CALISPO observation. The results indicate the model is capable of simulating the right timing of dust transport event and most loading below 3-km altitude; normalization of model dust with the PM10 near the Gobi deserts improves modeling surface dust concentration in Nanjing. (C) 2015 Elsevier Ltd. All rights reserved.


英文关键词Asian dust Optical properties Lidar Air quality Modeling
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000358809600034
WOS关键词TO-BACKSCATTER RATIO ; LIDAR MEASUREMENTS ; RAMAN LIDAR ; POLLUTION ; EXTINCTION ; DEPOLARIZATION ; SCATTERING ; AEROSOLS ; EPISODES ; NETWORK
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构南京大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186090
作者单位1.Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China;
2.CUNY City Coll, NOAA, CREST, New York, NY 10031 USA;
3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714
Han, Yong,Wu, Yonghua,Wang, Tijian,et al. Characterizing a persistent Asian dust transport event: Optical properties and impact on air quality through the ground-based and satellite measurements over Nanjing, China[J]. 南京大学,2015,115:304-316.
APA Han, Yong.,Wu, Yonghua.,Wang, Tijian.,Xie, Chenbo.,Zhao, Kun.,...&Li, Shu.(2015).Characterizing a persistent Asian dust transport event: Optical properties and impact on air quality through the ground-based and satellite measurements over Nanjing, China.ATMOSPHERIC ENVIRONMENT,115,304-316.
MLA Han, Yong,et al."Characterizing a persistent Asian dust transport event: Optical properties and impact on air quality through the ground-based and satellite measurements over Nanjing, China".ATMOSPHERIC ENVIRONMENT 115(2015):304-316.
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