| Chemical composition and its origin in spring rainwater over Taihu Lake |
| |
| 作者姓名： | 王雪梅 杨龙元 秦伯强 纪玲玲 |
| |
| 作者单位： | [1]School of Environmental Science and Engineering, Sun Yat-san University, Guangzhou 510275, China [2]Nanjing Institute of geography and Limnology, Chinese Academy of Sciences （NIGLAS）, Nanjing 210008, China |
| |
| 基金项目： | Supported by the Cooperation Project Study on Impacts of Atmospheric Nitrogen and Phosphorous Input on Water Quality granted by the NSFC (No.40110734) and The Grants Committee of Hong Kong (No.N-HKUST612/01) |
| |
| 摘 要： | 1 INTRODUCTION Rainfall chemical composition is mainly re- sulted from inner-cloud nucleation and under-cloud washing. The aerosol in cloud features regional scales. The concentration and chemical composition of under-cloud aerosol reflect in overall the …
|
| 关 键 词： | 水文化学 太湖 雨量 水体污染化学 |
| 收稿时间： | 2005-12-02 |
| 修稿时间： | 2006-07-10 |
Chemical composition and its origin in spring rainwater over Taihu Lake |
| |
| Wang Xuemei,Yang Longyuan,Qin Boqiang,Ji Lingling.Chemical composition and its origin in spring rainwater over Taihu Lake[J].Chinese Journal of Oceanology and Limnology,2006,24(4):421-427. |
| |
| Authors: | Wang Xuemei Yang Longyuan Qin Boqiang Ji Lingling |
| |
| Institution: | (1) School of Environmental Science and Engineering, Sun Yat-san University, 510275 Guangzhou, China;(2) Nanjing Institute of geography and Limnology, Chinese Academy of Sciences (NIGLAS), 210008 Nanjing, China;(3) Meteorology Institute, PLA Tech. & Sci. University, 211101 Nanjing, China |
| |
| Abstract: | Chemical compositions of rainwater collected in three stations in Taihu Lake in Jiangsu Province, China between March and May 2003 were analyzed through numerical simulations and field observation data. In terms of average ion deposition rate in spring at the air/water interface, of all anions, that of 2 SO 4 was the largest followed by NO3, whereas among all cations, Ca2 concentration and the rate was the largest, and then NH 4 was the next. The correlation of ion concentration indicated that the catchment of the lake has been artificially polluted considerably. Using backward trajectory analysis, the raining water in the stations in Taihu Lake was classified. In spring, marine-originated rain is the main contribution to this area, counting for 92.7% of the total precipitation, in which 2 SO 4,NO3and NH 4con-tributed 89.2%, 88.1%, and 88.3% respectively to the total spring-rain chemicals, whereas land-originated rains contributed in a small amount. However, the ion concentration in the land-originated rain was higher and acidic, causing considerable harm to local ecosystem. The analysis of backward trajectory analysis shows that three types of air masses influenced the chemical composition of the lake water, namely, air mass from NE direction, air mass from SW direction, and local air mass. Although the local air masses often produced small rainfall amount, but the nature of high ion concentration and high acidity impacted the local ecosystem remarkably. The ion concentration and rainfall from long-distance boreal air mass are clearly greater than those in austral air. |
| |
| Keywords: | rainfall chemistry backward air mass trajectory synoptic situation |
| 本文献已被 维普 万方数据 SpringerLink 等数据库收录！ |
|
