摘要
采用天津地区13个台站1951-2012年的逐月、逐日降水资料,从降水量、降水日数、不同等级降水事件和持续性降水等方面,分析了天津汛期降水的变化特征。研究结果表明：1951-2012年天津汛期降水总量呈不显著的下降趋势,各等级降水量均有所减少,其中,大雨的降水量下降显著;降水总日数呈显著的下降趋势,各等级降水日数均呈下降趋势,其中,小雨日数下降显著;汛期平均降水强度不存在线性趋势;近期天津地区的干旱化趋势主要表现为降水日数的显著减少,暴雨以上量级的强降水事件对汛期降水总量具有重要的影响。
The variations of floodseason precipitation in Tianjin were examined in terms of total precipitation, rainy days,different levels of precipitation events and persistent precipitation events based on daily and monthly precipitation observations of 13 weather stations from 1951 to 2012. The result showed that the total precipitation in floodseason had not changed significantly and different levels of precipitation presented a declining tendency during 1951 - 2012,especially for heavy rain it decreased significantly. The total precipitation days showed similar tendency as heavy rain. The different levels of precipitation days exhibited declined trend,in which light rain days decreased significantly. There was not linear trend detected in the precipitation intensity during the flood season. It is concluded that the recent drought trend in Tianjin was mainly related to significant reduction in precipitation days,whereas a few heavy precipitation events greatly affected the total precipitation of the flood season.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2014年第4期83-88,共6页
Journal of Arid Land Resources and Environment
基金
中国民航大学校内基金(09CAUC-E02)
2013年民航节能减排专项基金项目(飞行终端区复杂气象的精细化数值预报技术研究)资助
关键词
降水
气候变化
汛期
天津
precipitation
climate change
flood season
Tianjin
