1928年甘肃旱灾的时空差异及气候背景  

Climatic Background of the Drought in Gansu in 1928

作　　者：李卓仑[1] 王乃昂[1] 董春雨[1] 吕晓东[1] 赵力强[1] 

机构地区：[1]兰州大学资源环境学院 兰州大学干旱区水循环与水资源研究中心,甘肃兰州730000

出　　处：《灾害学》2010年第4期11-15,32,共6页Journal of Catastrophology

基　　金：国家基础科学人才培养基金(J0730536);国家自然科学基金(50879033);高等学校博士点专科基金(20090211110025)

摘　　要：整理了1928年甘肃救灾档案资料《甘肃省民国十七年各县灾情一览表》,通过提取该档案中的被灾地域、灾民人口、灾情状况等数据,建立以县为基本单位的灾情指数的方法,复原了我国近代历史时期一次重大旱灾——1928年甘肃旱灾的受灾地区和受灾情况。复原结果表明,甘肃省此次旱灾灾情最严重地区为该省的中东部,而该省西部和北部地区受灾相对较轻。在成灾时间上,春季该省中东部地区就形成旱灾的中心,并且该中心在夏季和秋季一直存在,形成了罕见的春、夏、秋三季连旱连灾的特点。this paper we researched the historical documents and reconstructed the spatial and temporal distribution characteristics of precipitation during a serious drought event in Gansu province in 1928. This drought event had been taken a long time and was rarely occurred. It was a severe drought event, which continued from spring to autumn, and affected large areas. The drought was extremely serious inthe eastern part of Gansu, on the contrary, in the western relatively light. The intensity of this droughtwas second only to the drought that occurred during the Chongzhen period of Ming dynasty. On that basis, the context of climate which caused that severe drought was analyzed. According to the analysis, the precipitation was less in most areas of China caused by the weak subtropical high intensity that resulted in this severe drought. This drought outbreak occurred during the period of climate transformation to warm and dry, and the high frequency of drought outbreak may be attributed to the increment of climate instability during this period.

关 键 词：甘肃 旱灾 气候背景 历史气候 1928年 

分 类 号：P426.616[天文地球—大气科学及气象学]