气候过渡带温度变化与淮河流域夏季降水的关系  

Relationship between Temperature Change in Climate Boundary and Summer Precipitation over the Huaihe River Basin

作　　者：刘富弘[1] 陈星[1] 程兴无[2] 宋寔[1] 

机构地区：[1]南京大学大气科学学院,南京210093 [2]水利部淮河水利委员会,蚌埠233001

出　　处：《气候与环境研究》2010年第2期169-178,共10页Climatic and Environmental Research

基　　金：国家自然科学基金项目40875043;国家重点基础研究发展计划项目2006CB400500;水利部淮河水利委员会资助和支持下的"淮河流域洪涝灾害气候特征研究"课题的一部分

摘　　要：淮河流域是我国南北气候的过渡带,气候过渡带位置的南北变动对淮河流域的降水有显著的影响。利用1952～2001年的温度和降水资料,计算了气候过渡带位置的变化和淮河流域降水与旱涝的关系,发现气候分界线位置的南北移动与淮河流域夏季降水呈显著负相关,即气候分界线北移夏季降水减少、气候偏旱;气候分界线南移则夏季降水增加、气候偏涝。气候分界线与淮河流域夏季降水的这一对应关系反映了春季冷空气活动的强度和时间对淮河流域夏季和梅雨降水有重要影响,即春季(特别是3月下旬)冷空气南下活动较强年份的夏季降水可能异常偏多。The Huaihe River basin is the climate transition zone between the north subtropical zone and the south extra-tropical zone of China. Precipitation in this region is influenced by the variation of the transition zone position. The northward and southward shifts of climate zones, precipitation,and flood and drought disasters in the Huaihe River basin are analyzed by using the temperature and precipitation data during 1952-2001. The result shows that the northward and southward shifts of climate zone and summer precipitation in the Huaihe River basin are evidently negative correlated,that is when the climate zones shift northward, summer precipitation decreases; when the climate zones shift southward, summer precipitation increases. This phenomenon suggests that the cold air activity in spring largely influences the precipitation during the Meiyu season and summer in the Huaihe River basin. In the years with strong active cold air in spring, the summer precipitation may increase abnormally.

关 键 词：淮河流域 气候过渡带 气候分界线 夏季降水 

分 类 号：P467[天文地球—大气科学及气象学]