湖泊科学2011，Vol.23Issue(1)：122-128,7.
高温微风条件下太湖流域风场时空特征分析
Spatio-temporal characteristics of wind field under high temperature and gentle breeze in Taihu Basin
摘要
Abstract
High temperature and gentle breeze were one of the key factors for the algae bloom formation in Lake Taihu. The days when temperature was higher than 25℃ at 14:00 and wind speed was less than 4 m/s at the same time were selected, and EOF analysis, cluster analysis of eight directions and divergence spatial distribution were used for studying the wind field from 17 meteorological stations in 2001 -2007 around Lake Taihu. The spatial characteristics of selected wind field showed that the southeast wind was the major pattern. When any direction wind passed across the lake, the significant divergence appeared above the downwind lake surface and near its banks. The divergence field center was observably in the southwest area of Lake Taihu. Furthermore, statistical analysis on the observational data from 4 meteorological stations, such as Wuxi, Yixing, Dongshan and Wuxian, with days meeting the above-mentioned weather conditions, was put forward during 1961 -2007. The numbers of days with high temperature and gentle breeze per year were less and the beginning time of such weather conditions was later before 1982. Oppositely, the numbers f such days per year was more and the beginning time was earlier after 2004. Both of them showed oscillation during 1982 to 2004.关键词
蓝藻水华/EOF/聚类分析/热力环流/风场/辐散/太湖流域Key words
Algae bloom/ EOF/ cluster analysis/ thermal circulation/ wind field/ divergence/ Taihu Basin引用本文复制引用
王成林,黄娟,钱新..高温微风条件下太湖流域风场时空特征分析[J].湖泊科学,2011,23(1):122-128,7.基金项目
国家重点基础研究发展计划项目(2008CB418003 )、江苏省环境监测科研基金项目(0919)和解放军理工大学基础理论研究基金项目联合资助. （2008CB418003 ）
