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[1]LIU Zhe,SUN Quan,LU Haitao,et al.Temporal and Spatial Characteristics of Droughts and Their Responses to Atmospheric Circulation in Ningxia[J].Research of Soil and Water Conservation,2023,30(03):225-231,239.[doi:10.13869/j.cnki.rswc.2023.03.011]

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Temporal and Spatial Characteristics of Droughts and Their Responses to Atmospheric Circulation in Ningxia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 03 Page number: 225-231,239 Column: Public date: 2023-04-10

Title:: Temporal and Spatial Characteristics of Droughts and Their Responses to Atmospheric Circulation in Ningxia

Author(s):: LIU Zhe, SUN Quan, LU Haitao, WANG Rui, JIANG Peng; (School of Agriculture, Ningxia University, Yinchuan 750021, China)

Keywords:: meteorological drought; atmospheric circulation; drought index; temporal and spatial characteristics; Ningxia

CLC:: P461.2

DOI:: 10.13869/j.cnki.rswc.2023.03.011

Abstract:: [Objective]Exploring the spatial and temporal characteristics of drought in Ningxia region and its causes is important for drought prevention and response decisions. [Methods] Based on the daily data of 24 meteorological stations in Ningxia Autonomous Region, the standardized precipitation evapotranspiration index(SPEI)was used. The MK nonparametric test and inverse distance weight interpolation were used to analyze the temporal and spatial variation of drought at different scales, and the response of Ningxia drought index to atmospheric circulation was quantitatively analyzed by Person correlation coefficient analysis. [Results](1)In 1982—2020, the SPEI drought index of each scale experienced the process of increasing-decreasing-increasing, and drought occurred frequently from 1990 to 2010.(2)The spatial distribution of the drought index on the seasonal scale is obviously different. The drought frequency is higher in spring, mainly distributed in the northern Yellow River irrigation area, and there are more moderate and severe droughts. The drought in spring and summer is obviously aggravating, and in autumn and winter is humid, but the drought intensity in autumn and winter is more intense than that in spring and summer.(3)The SPEI value of Ningxia decreased during the ENSO warm event, and the SPEI index increased during the ENSO cold event. The ENSO warm event was drier than the ENSO cold event.(4)The whole territory of Ningxia is significantly affected by the NAO and AO indices, and there is no lag relationship. The SOI index has the greatest correlation with the SPEI value of Ningxia with a lag of 4 months, which mainly affects the northern area of Ningxia. The PDO index has the most significant correlation with a lag of 6 months. The MEI index had the best correlation with the ENSO index with a lag of 3 months and 5 months respectively, but the correlation with the drought in Ningxia was weaker. [Conclusion] Drought is the main meteorological disaster in Ningxia. The analysis of the response relationship between the temporal and spatial changes of drought in Ningxia and the atmospheric circulation provides a reference for the prevention of drought events in Ningxia and regional adaptation to climate change.

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Last Update: 2023-04-10