Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 1352-2310 |
EISSN | 1873-2844 |
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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