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[1]YANG Xiaoling,DING Wenkui,SUN Zhanfeng,et al.Evolution Characteristics of Meteorological Drought in Eastern Hexi Corridor During Recent 60 Years[J].Research of Soil and Water Conservation,2022,29(01):242-248.

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Evolution Characteristics of Meteorological Drought in Eastern Hexi Corridor During Recent 60 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 242-248 Column: Public date: 2022-02-20

Title:: Evolution Characteristics of Meteorological Drought in Eastern Hexi Corridor During Recent 60 Years

Author(s):: YANG Xiaoling^1,2, DING Wenkui¹, SUN Zhanfeng¹, NIE Xin²; (1.Wuwei Meteorological Bureau of Gansu Province, Wuwei, Gansu 733099, China; 2.Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China)

Keywords:: eastern Hexi corridor; temperature; precipitation; drought; evolution characteristics

CLC:: S423

DOI:: -

Abstract:: In order to improve the prediction and early warning level of meteorological drought, prevent drought disasters and reduce agricultural economic losses in eastern Hexi Corridor, based on the daily temperature and precipitation data of 5 automatic meteorological stations in eastern Hexi Corridor during 1960—2019, spatio-temporal evolution characteristics of temperature, precipitation and meteorological drought in eastern Hexi Corridor were analyzed by using statistical method. The result showed that annual and agricultural seasonal temperature in desert area and oasis plain area was higher than that in shallow mountain area, and that in shallow mountain area was higher than that in alpine mountain area; annual and agricultural season precipitation was more in alpine mountain area than that in smhallow mountain area, and that in shallow mountain area was more than that in desert area and oasis plain area in eastern Hexi Corridor; annual and agricultural seasonal temperature increased significantly over years, and annual and agricultural seasonal precipitation increased overs; drought years in northen shallow mountain area were more than those in oasis plain area and southern shallow mountain area, and those were more in oasis plain area and southern shallow mountain area than those in the alpine mountain area, and those were more in alpine mountain area than those in desert area; agricultural seasonal drought years were more in alpine mountain area than in desert area, and those were more in desert area than those in oasis plain area and southern shallow mountain area, and those are more in oasis plain area and southern shallow mountain area than those in northen shallow mountain area in eastern Hexi Corridor; annual and agricultural seasonal drought years decreased first and then increased obviously over years; variation rate of annual and agricultural seasonal drought years at all levels was larger, drought years decreased with increase of drought degree, and extra-drought years were the least. Meteorological drought events identified with atmospheric drought index proposed by Д·A·ⅡeДb are basically consistent with actual drought events, so that the index can monitor drought year and drought grade in eastern Hexi Corridor.

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Last Update: 2022-02-20