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[1]ZHOU Dan,LUO Jing,ZHENG Ling,et al.Characteristics and Causes of Meteorological Drought in North China Based on Grid Data[J].Research of Soil and Water Conservation,2019,26(04):195-202.

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Characteristics and Causes of Meteorological Drought in North China Based on Grid Data

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 195-202 Column: Public date: 2019-06-11

Title:: Characteristics and Causes of Meteorological Drought in North China Based on Grid Data

Author(s):: ZHOU Dan¹, LUO Jing², ZHENG Ling¹, YANG Chunhua¹, GUO Guang¹; 1. Meteorological Service Center of Qinghai, Xining 810001, China;
2. Qinghai Engineering Consulting Center, Xining 810001, China

Keywords:: grid data; North China; meteorological drought; cause analysis

CLC:: P467;S423

DOI:: -

Abstract:: Based on the data of 0.5°×0.5° precipitation and temperature grids in North China from 1961 to 2013, we selected the standardized precipitation evapotranspiration index and analyzed the temporal and spatial variation characteristics of drought events at different time scales in North China, and analyzed the main causes of meteorological drought in some aspects according to atmospheric circulation and global changes. The results show that: (1) drought occurred on the annual, spring, summer, autumn, winter and monthly scales in North China, the summer drought was the most serious; the drought in North China was the most severe in the 1990s, followed by drought since 2000; the frequency of drought on the annual scale showed the distribution pattern of high frequency in the north and low frequency in the south; in the four seasons, the drought mainly occurred in the northwest and southeast of Henan, the northwestern part of Shandong Peninsula, Shanxi, central and southern Hebei, and the Beijing—Tianjin—Hebei region; (2) There was a significant negative correlation between ENSO event intensity and precipitation in Beijing-Tianjin-Hebei; when the intensity increased, the precipitation decreased, and when it weakened, the precipitation increased; the intensity of ENSO events in the whole North China region was significantly positively correlated with the temperature; when the intensity increased, the temperature increased, and when the intensity decreased, the temperature decreased; among them, El Niño had a tendency of temperature rise, and La Niña had a tendency of temperature decrease. From the perspective of global change, the main causes of meteorological drought in North China were rapid urbanization and global warming.

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