Regional Characteristics of Drought in China under the Background of Climate Warming

doi:10.7522/j.issn.1000-694X.2019.00088

Journal of Desert Research ›› 2019, Vol. 39 ›› Issue (6): 209-215.DOI: 10.7522/j.issn.1000-694X.2019.00088

Regional Characteristics of Drought in China under the Background of Climate Warming

Ma Pengli, Han Lanying, Zhang Xudong, Liu Weiping

Lanzhou Regional Climate Center, Lanzhou 730020, China

Received:2019-10-02 Revised:2019-10-28 Published:2019-11-14

Abstract

Abstract: Under the climate background of global warming, the characteristics of drought change are very prominent in recent years in China, and the understanding of the mechanism of drought disaster needs to be further deepened under the new situation. The improved comprehensive meteorological drought index (MCI) was selected as the monitoring index for drought based on the daily temperature and precipitation data of 527 meteorological stations from 1960 to 2014 in China, and the variation characteristics and differences of drought intensity, frequency and duration were analyzed systematically in seven regions of China. The results show that the range, severity, frequency and duration of drought increase in China under the background of climate warming. The characteristics of drought had obvious regional changes, and there were significant differences among seven different regions. The degree of drought significantly increased in southwest, central, north and south China. The total number of droughts was 45 years in north and southwest China, while it was 35-36 years in other places, and the number of severe or above droughts was mainly more. The most severe drought years were 14 years in north China, followed by 7 years in northeast and south China. The time and region of drought are also random. Drought may occur in all seasons,but the drought happened mainly in summer in China, mostly happened in spring and summer in northeast, and mainly happened in autumn in south. The duration of drought sometimes is as long as nine months. In some regions, the drought pattern is one peak, while it is two peaks in some areas. The drought in north is heavier and lasts longer than south. Moreover, drought occurs not only in the arid and semi-arid regions of the north, but also in the humid and semi-humid regions of the south. Under the background of climate warming, the drought is increasing in all regions of China, not only in three regions of the northern, but also in four regions of the southern.

Key words: China, climate change, disaster factors, MCI, drought characteristics, regional differences

CLC Number:

X703.5

Ma Pengli, Han Lanying, Zhang Xudong, Liu Weiping. Regional Characteristics of Drought in China under the Background of Climate Warming[J]. Journal of Desert Research, 2019, 39(6): 209-215.

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Regional Characteristics of Drought in China under the Background of Climate Warming

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