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[1]WANG Shiwei.Spatial and Temporal Dynamics of Drought in Inner Mongolia in Recent 20 Years and Its Response to Seasonal Climate and Evapotranspiration[J].Research of Soil and Water Conservation,2022,29(04):231-239.

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Spatial and Temporal Dynamics of Drought in Inner Mongolia in Recent 20 Years and Its Response to Seasonal Climate and Evapotranspiration

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 231-239 Column: Public date: 2022-06-20

Title:: Spatial and Temporal Dynamics of Drought in Inner Mongolia in Recent 20 Years and Its Response to Seasonal Climate and Evapotranspiration

Author(s):: WANG Shiwei; (Hubei University of Automotive Technology, Shiyan, Hubei 442002, China)

Keywords:: TVDI; temperature; precipitation; evapotranspiration; Inner Mongolia

CLC:: S342.1

DOI:: -

Abstract:: In order to realize the dynamic and continuous monitoring of drought in Inner Mongolia, based on the temperature vegetation drought index(TVDI), trend analysis and R/S analysis methods were used to explore the spatiotemporal distribution characteristics of TVDI in Inner Mongolia from 2001 to 2020, and the influence of precipitation, temperature and evapotranspiration on the change of TVDI. The results show that:(1)TVDI decreased at a rate of 0.000 9 per year, and severe drought occurred on a large scale in 2007, 2010 and 2013; TVDI decreased at the rate of 0.000 5, 0.001 8, 0.001 3 and 0.000 07 per year in spring, summer, autumn and winter, respectively;(2)in spring and summer, TVDI will increase in most areas of Inner Mongolia in the future; in autumn, TVDI will decrease in most pixels in a period of time; in winter, TVDI will increase in the future;(3)in spring, summer and autumn, TVDI was negatively correlated with precipitation and temperature, while in winter, TVDI was positively correlated with precipitation and precipitation; in spring and winter, the correlation between ET and TVDI was significantly positive; in summer, the correlation between ET and TVDI gradually transited from positive correlation to negative correlation from southwest to northeast; in autumn, the correlation between ET and TVDI was consistent in spatial distribution, with negative correlation as the main correlation. These research results indicate that the drought degree in Inner Mongolia has eased in recent 20 years, but the trend of drought degree slowing down will become smaller or increase in the future. Therefore, the upcoming research should further analyze the temporal and spatial dynamics of monthly drought and evapotranspiration, which is of great significance for further measuring and predicting how seasonal evapotranspiration and drought jointly affect the ecological environment and economic development of Inner Mongolia.

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Last Update: 2022-06-20