长江三角洲近46 a气温和降水的变化趋势
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潘敖大1,王珂清2,曾燕2,谢志清2,苗茜2  
基金项目:江苏省科技支撑计划社会发展项目(BE2009694)
中文摘要:利用长江三角洲地区84个气象站观测数据,分析了长江三角洲1961—2006年气温和降水的时空变化趋势。结果表明,46 a间长江三角洲地区年平均气温上升趋势显著,冬季平均气温的增温幅度最大,春、秋次之。增温显著区域与城市带分布区域吻合。极端最低气温有明显上升,而年极端低温事件日数的下降趋势显著。部分地区的极端最高气温呈上升趋势,在城市密集带尤为突出。年降水量没有明显的变化趋势,但降水的季节分配有所变化,冬、夏季降水量呈现显著上升趋势,秋季降水量明显下降,春季没有明显变化。
中文关键词:气候变化  气温  降水  长江三角洲
 
Trends of temperature and precipitation variation in the Yangtze River Delta from 1961 to 2006
Abstract:Based on the meteorological data of 84 stations in the Yangtze River delta from 1961 to 2006,the basic features of temporal and spatial changes of temperature and precipitation are investigated.Results show that the annual mean temperature increased significantly during the past 46 years.Winter,spring and autumn mean temperature all increased significantly,and the temperature increasing rate in winter is the biggest.The areas with significant temperature increase coincide with the main urban areas.The annual minimum temperature shows an evident increasing trend while the frequency of extreme low temperature events decreased.In most regions,the maximum temperature increased significantly,especially in the mega city regions.The annual precipitation did not show any significant trend,but the seasonal distribution of the precipitation exhibits significant changes.The precipitation increased in both winter and summer while decreased in autumn.However,no significant trend was detected in spring.
keywords:climate change  air temperature  precipitation  Yangtze River Delta
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