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Spatiotemporal Variations of Precipitation in China Using Surface Gauge Observations from 1961 to 2016

1
State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
2
Division of Geology and Planetary Science, California Institute of Technology, Pasadena, CA 91125, USA
3
Numerical Weather Prediction Center of China Meteorological Administration, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 303; https://doi.org/10.3390/atmos11030303
Received: 16 February 2020 / Revised: 9 March 2020 / Accepted: 18 March 2020 / Published: 20 March 2020
(This article belongs to the Section Meteorology)
Long-term precipitation trend is a good indicator of climate and hydrological change. The data from 635 ground stations are used to quantify the temporal trends of precipitation with different intensity in China from 1961 to 2016. These sites are roughly uniformly distributed in the east or west regions of China, while fewer sites exist in the western region. The result shows that precipitation with a rate of <10 mm/day dominates in China, with a fraction of >70%. With a 95% confidence level, there is no significant temporal change of annually averaged precipitation in the whole of China. Seasonally, there are no significant temporal changes except for a robust decreasing trend in autumn. Spatially, significant differences in the temporal trends of precipitation are found among various regions. The increasing trend is the largest in Northwest China, and the decreasing trend is the largest in North China. The annually averaged number of precipitation days shows a decreasing trend in all regions except for Northwest China. Regarding precipitation type, the number of light precipitation days shows a robust decreasing trend for almost all regions, while other types show no significant change. Considering the high frequency, the temporal trends of light precipitation could highly explain the temporal variation of the total precipitation amount in China. View Full-Text
Keywords: precipitation amount; precipitation days; temporal variation; light precipitation; heavy precipitation; China precipitation amount; precipitation days; temporal variation; light precipitation; heavy precipitation; China
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Su, Y.; Zhao, C.; Wang, Y.; Ma, Z. Spatiotemporal Variations of Precipitation in China Using Surface Gauge Observations from 1961 to 2016. Atmosphere 2020, 11, 303.

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