Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026330 |
Atmospheric deposition and air-sea gas exchange fluxes of DDT and HCH in the Yangtze River Estuary, East China Sea | |
Li, Zhongxia1; Lin, Tian2; Li, Yuanyuan1; Jiang, Yuqing1; Guo, Zhigang1 | |
2017-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:14 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Yangtze River Estuary (YRE) is strongly influenced by the Yangtze River and lies on the pathway of the East Asian Monsoon. This study examined atmospheric deposition and air-sea gas exchange fluxes of dichlorodiphenyltrichloroethane (DDT) and hexachlorocyclohexane (HCH) to determine whether the YRE is a sink or source of selected pesticides at the air-water interface under the influences of river input and atmospheric transport. The air-sea gas exchange of DDT was characterized by net volatilization with a marked difference in its fluxes between summer (140 ng/m(2)/d) and the other three seasons (12 ng/m(2)/d), possibly due to the high surface seawater temperatures and larger riverine input in summer. However, there was no obvious seasonal variation in the atmospheric HCH deposition, and the air-sea gas exchange reached equilibrium because of low HCH levels in the air and seawater after the long-term banning of HCH and the degradation. The gas exchange flux of HCH was comparable to the dry and wet deposition fluxes at the air-water interface. This suggests that the influences from the Yangtze River input and East Asian continental outflow on the fate of HCH in the YRE were limited. The gas exchange flux of DDT was about fivefold higher than the total dry and wet deposition fluxes. DDT residues in agricultural soil transported by enhanced riverine runoff were responsible for sustaining such a high net volatilization in summer. Moreover, our results indicated that there were fresh sources of DDT from the local environment to sustain net volatilization throughout the year. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408346000027 |
WOS关键词 | PERSISTENT ORGANIC POLLUTANTS ; ORGANOCHLORINE PESTICIDES OCPS ; GLOBAL DISTRIBUTION MODEL ; WATER EXCHANGE ; SOUTH CHINA ; ALPHA-HEXACHLOROCYCLOHEXANE ; SPATIAL-DISTRIBUTION ; AGRICULTURAL SOIL ; SURFACE SEDIMENTS ; OCEAN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33563 |
专题 | 气候变化 |
作者单位 | 1.Fudan Univ, Dept Environm Sci & Engn, Inst Atmospher Sci, Shanghai Key Lab Atmospher Particle Pollut & Prev, Shanghai, Peoples R China; 2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang, Guizhou, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Zhongxia,Lin, Tian,Li, Yuanyuan,et al. Atmospheric deposition and air-sea gas exchange fluxes of DDT and HCH in the Yangtze River Estuary, East China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(14). |
APA | Li, Zhongxia,Lin, Tian,Li, Yuanyuan,Jiang, Yuqing,&Guo, Zhigang.(2017).Atmospheric deposition and air-sea gas exchange fluxes of DDT and HCH in the Yangtze River Estuary, East China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(14). |
MLA | Li, Zhongxia,et al."Atmospheric deposition and air-sea gas exchange fluxes of DDT and HCH in the Yangtze River Estuary, East China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.14(2017). |
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