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引用本文:闵屾,严蜜,刘健.鄱阳湖流域干旱气候特征研究.湖泊科学,2013,25(1):65-72. DOI:10.18307/2013.0109
MIN Shen,YAN Mi,LIU Jian.Climatic characteristics of the drought in Lake Poyang catchment. J. Lake Sci.2013,25(1):65-72. DOI:10.18307/2013.0109
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鄱阳湖流域干旱气候特征研究
闵屾, 严蜜, 刘健
中国科学院南京地理与湖泊研究所, 湖泊与环境国家重点实验室, 南京 210008
摘要:
本文利用鄱阳湖流域127个站点1960-2007年逐日降水和温度资料,选用Z指数对鄱阳湖流域的气象干旱进行分析,并将干旱分为偏旱、大旱和特旱三个等级.研究结果表明鄱阳湖流域干旱基本呈现出南少北多、南强北弱的空间分布形式.鄱阳湖流域7-12月发生的干旱以偏旱为主,大旱和特旱主要出现在1-6月.线性趋势变化分析表明,2000年以来干旱范围和干旱强度均呈现出增加的趋势,其中,2003、2004和2007年的干旱较为严重.2003年大部分月份偏旱范围广、强度大,全年大旱和特旱出现的范围均较小,但3-4月和6-7月的大旱和特旱强度较大;2004年大部分月份偏旱范围和强度均相对较小,但在3月和6月出现范围较大且强度较强的大旱和特旱;2007年干旱分布更为极端,仅在7、10和11月出现范围较广或强度较大的偏旱,而在5月集中出现面积超过80%的大旱和特旱.
关键词:  鄱阳湖流域  气象干旱  Z指数  季节变化
DOI:10.18307/2013.0109
分类号:
基金项目:中国科学院知识创新工程重要方向性项目(KZCX2-YW-337);国家重点基础研究发展计划"973"项目(2010CB950102);中国科学院战略性先导科技专项项目(XDA05080800)联合资助
Climatic characteristics of the drought in Lake Poyang catchment
MIN Shen, YAN Mi, LIU Jian
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China
Abstract:
Based on daily rainfall and temperature datasets of 127 stations in Lake Poyang catchment during the period of 1960-2007,the climatic drought which was classified into slight drought,heavy drought and extreme drought by using Z index was studied in this paper.The results show that the frequency of drought in the south part of Lake Poyang area is less than that in the north part and the strength of drought in the south part is stronger than that in the north part.The slight drought mainly occurred from July to December,while the heavy drought and extreme drought mainly occurred from January to June.The range and strength of the drought have been increased since 2000 year,especially in 2003,2004 and 2007.The slight drought appeared in most months of 2003 with extensive area and heavy strength.The heavy and extreme drought with small area appeared in most months of 2003,except in March-April and June-July.The area and strength of slight drought were small in most months of 2004,but the heavy and extreme drought with extensive area and heavy strength appeared in March and June.The slight drought in July,October and November of 2007 occurred in extensive area,but heavy and extreme drought in May occurred in more than 80% area of Lake Poyang catchment.
Key words:  Lake Poyang catchment  climatic drought  Z index  seasonal variation
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