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引用本文:王国杰,姜彤,王艳君,俞肇元.洞庭湖流域气候变化特征(1961-2003年).湖泊科学,2006,18(5):470-475. DOI:10.18307/2006.0505
WANG Guojie,JIANG Tong,WANG Yanjun,YU Zhaoyuan.Characteristics of climate change in the Lake Dongting Basin (1961-2003). J. Lake Sci.2006,18(5):470-475. DOI:10.18307/2006.0505
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洞庭湖流域气候变化特征(1961-2003年)
王国杰1,2,3, 姜彤1,2, 王艳君1,3, 俞肇元4
1.中国科学院南京地理与湖泊研究所, 南京210008;2.中国气象局气候研究开放实验室, 北京100081;3.中国科学院研究生院, 北京100039;4.南京师范大学, 南京210097
摘要:
以22个气象站1961-2003年的气象观测数据为基础,对洞庭湖流域的气温、降水和参照蒸散量进行趋势与突变分析.从1970年开始,洞庭湖流域经历了一个缓慢而稳定的增温过程,1990s发生突变进入快速增温时期;尤其是是在春、冬季节,这种突变式的增温特征非常显著;秋季持续而稳定增温,而夏季气温并无明显变化.进入1990s,洞庭湖流域降水有明显增多,尤其是夏季降水突变式增加;与此同时,夏季暴雨频率也突变式增大,但是暴雨强度并无明显变化.1900s迄今,参照蒸散量持续而稳定的减少,夏季减少量尤为显著.全球变暖的区域响应,驱动洞庭湖流域水循环速度加快,夏季降水增多,而蒸发能力减弱,这是1990s洞庭湖流域洪水频发的主要气候因子.
关键词:  气候变化  趋势  突变  洞庭湖流域
DOI:10.18307/2006.0505
分类号:
基金项目:中国科学院南京地理与湖泊研究所知识创新工程所长专项基金(S220007);中国科学院知识创新工程重要方向项目(KZCX3-SW-331);中国气象局气候变化专项(CCSF2005-2-QH4)联合资助
Characteristics of climate change in the Lake Dongting Basin (1961-2003)
WANG Guojie1,2,3, JIANG Tong1,2, WANG Yanjun1,3, YU Zhaoyuan4
1.Nanjing Institute of Geography and Limnology, C4S, Nanjing 210008, P. R. China;2.Key Laboratory of Climate Change Research, China Meteorological Administration, Beijing 100081, P. R. China;3.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China;4.Nanjing Normal University, Nanjing 210097, P. R. China
Abstract:
This paper has detected the trends and abrupt changes of climate changes in Lake Dongting basin in the past 40 years based on observed data of 22 meteorological stations. Lake Dongting basin had undergone a slow but steady increase of temperature since 1970s, but a significant increase with abrupt change has been detected since 1990s, especially in spring and winter;while in summer, the temeprelure has changed little. A positive and abrupt trend of precipitation in summer as well as its storm frequency has been well detected in 1990s;on the contrary, hardly has the storm density changed. The reference evapotranspiration has decreased steadily and obviously since 1960s;and in summer the decrease is of much more significance. The accelerated water circulation driven by global warming-up has brought the Lake Dongting basin more precipitation in summer, but the reference evapotranspiration has decreased at the same time,as is the main climatic contributor to the frequent floods in summer in 1990s
Key words:  Climate change  trend  abrupt change  Lake Dongting basin
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