Impact of long-range transport and under-cloud scavenging on precipitation chemistry in East China
Impact of long-range transport and under-cloud scavenging on precipitation chemistry in East China
复制标题
远距离输送和云下清除对华东地区降水化学的影响
DOI：
10.1007/s11356-011-0516-2
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发表时间：
2011-05
影响因子：
5.8
通讯作者：
Wang, Wenxing
中科院分区：
文献类型：
--
作者：
Li, Yuhua;Wang, Yan;Ding, Aijun;Liu, Xiaohuan;Guo, Jia;Li, Penghui;Sun, Minghu;Ge, Fuling;Wang, Wenxing
IntroductionTwo hundred twenty-five precipitation samples were collected at high- (summit, 1,534 m ASL) and low-elevation (base, 218 m ASL) sites between 2005 and 2008 in eastern China. The present work focused on the roles of long-range transport and under-cloud/boundary layer scavenging on chemical composition of precipitation collected at the two sites.MethodsIonic and trace species were analyzed in 225 precipitation samples. A total of 72 precipitation events occurring simultaneously at the summit and base sites were further examined. Positive matrix factorization (PMF) and backward air mass trajectories were used to identify the sources of precipitation pollutants.ResultsLow pH and high concentrations of ionic and trace species were measured at both sites. Inter-correlations for the simultaneous samples at the two sites were poor for trace elements (−0.07~0.47). A several fold increase in major ion (122~546%) and trace element (261~3,302%) concentrations occurred as the rain fell. Approximately 89% of the air masses responsible for the summit precipitation events were of distance origin. Marine salt, crustal material, fossil fuel burning plus secondary products, and metallic-industry-related factors were identified by PMF, contributing 9.7%, 22.8%, 41.8%, and 25.6%, respectively, to the precipitation pollutants at the summit and 13.3%, 31.9%, 39.6%, and 15.2%, respectively, at the base.ConclusionsLong-range atmospheric transport primarily influenced the high and the low site precipitation was strongly influenced by the under-cloud scavenging process of local boundary layer pollutants. Crustal material and fossil fuel burning plus secondary products were the predominant pollution sources in this region.
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影响因子：
5
作者：
Al-Momani, IF
通讯作者：
Al-Momani, IF
影响因子：
5
作者：
Bhanuprasad, S. G.;Venkataraman, Chandra;Bhushan, Mani
通讯作者：
Bhushan, Mani
影响因子：
5
作者：
Hou, H;Takamatsu, T;Hosomi, M
通讯作者：
Hosomi, M
影响因子：
5
作者：
James B. Anderson;R. Baumgardner;Sandra E. Grenville
通讯作者：
James B. Anderson;R. Baumgardner;Sandra E. Grenville
影响因子：
5
作者：
Hengchi Lei;P. Tanner;Mei Huang;Zhi-Lai Shen;Yulin Wu
通讯作者：
Hengchi Lei;P. Tanner;Mei Huang;Zhi-Lai Shen;Yulin Wu