摘要
对三峡水库蓄水前位于坝区长江左、右两岸的3组气温观测资料进行对比分析,结果表明:①水体对水库周边气温有白天降温、夜间增温效应,可抑制极端最高气温,抬升极端最低气温;②总体上增温幅度比降温幅度大,增温幅度夏季大于冬季,春秋季居中,在20:00夏半年多大于冬半年,在08:00冬半年多大于夏半年,20:00、08:00增温幅度0.2～1.0℃的日数分别占总日数的46%、55%以上;③增温效应与降水季节性变化趋势基本一致,降水多的月份增温明显,降水少的月份增温幅度则较小;④降温幅度为春夏季小于秋冬季;⑤逐时气温分析显示,远水区较近水区各时次气温在10:00～15:00高0.1～0.4℃,其它时间尤其是夜间低0.1～0.7℃.
Through analyzing the temperature data from three pairs of stations around the dam of the Three Gorges Reservoir before storing water, the following is revealed： ① The water increased temperature at night and decreased temperature in the daytime, restrained the maximum temperature and raised the minimum temperature. ② Generally temperature increase is more obvious than temperature decrease, and temperature increase is greater in summer than in winter. ③ The warming effect accords with the trend of seasonal precipitation change, more evident in rainy season than in dry season. ④ Temperature decrease is less obvious in spring and summer than in autumn and winter. ⑤ The hour-to-hour analysis of air temperature shows that air temperature is 0.1 ℃ to 0.4 ℃ higher from 10 ： 00 to 15：00 in the area far from the reservoir, while 0.1 ℃ to 0.7 ℃ lower at night around the reservoir.
出处
《气象科技》
2005年第4期334-339,共6页
Meteorological Science and Technology
基金
国务院三峡工程建设委员会办公室生态环境补偿经费资助
