Spatio-temporal Patterns of Extreme Precipitation Events over China in Recent 56 Years

Shan LU; Zeyong HU; Baipeng WANG; Pei QIN; Li WANG

doi:10.7522/j.issn.1000-0534.2019.00058

Plateau Meteorology >

2020 , Vol. 39 >Issue 4: 683 - 693

DOI: https://doi.org/10.7522/j.issn.1000-0534.2019.00058

Spatio-temporal Patterns of Extreme Precipitation Events over China in Recent 56 Years

Shan LU ,
Zeyong HU ,
Baipeng WANG ,
Pei QIN ,
Li WANG

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1.Key laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;2.Shaanxi Meteorological Bureau, Xi’an 710014, Shaanxi, China;3.Center for Excellence in Tibetan Plateau Earth Science, Chinese Academy of Science, Beijing 100101, China;4.University of Chinese Academy of Sciences, Beijing 100049, China;5.Xi'an Meteorological Bureau, Xi’an 710016, Shaanxi, China

Received date: 2019-04-09

Online published: 2020-08-28

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Abstract

Using the daily precipitation datasets of 693 observational stations during the period of 1961 -2016, this paper analyzed the spatio-temporal patterns and variations of the extreme precipitation events, persistent extreme precipitation events and their start and end dates in China.The results showed that the extreme precipitation events increased significantly in the past 56 years in China, and the increasing trends of the amounts and days of extreme precipitation were observed at about 68% of the stations, which were mainly located in the southeastern coastal and Western China.The largest increase of extreme precipitation amounts was observed in Eastern China, with an increasing trend up to 18.2 mm·(10a)^-1, while the most significant increase of extreme precipitation days was observed in Northwestern China, with an increasing trend of 0.37 d·(10a)^-1.The variation of persistent extreme precipitation events averaged over China was characterized by insignificant increasing trend.The significant increasing trends of the amounts and frequencies of persistent extreme precipitation at the 99% confidence level were only observed over the Northwestern China, while the Northern China and Southwestern China showed insignificant decreasing trends.The start and end dates of extreme precipitation events averaged over China showed obvious advance and delay trend, respectively.The significant advance of start dates was found in Northwestern China, Qinghai-Tibetan Plateau and Northeastern China, and the significant delay of end dates was observed in Northwestern China, which led to an increase in the duration of extreme precipitation events in Northwestern China, with the largest rate of 10.4 d·(10a)^-1.

Key words： Extreme precipitatio; persistent extreme p; spatio-temporal patt

Cite this article

Shan LU , Zeyong HU , Baipeng WANG , Pei QIN , Li WANG . Spatio-temporal Patterns of Extreme Precipitation Events over China in Recent 56 Years[J]. Plateau Meteorology, 2020 , 39(4) : 683 -693 . DOI: 10.7522/j.issn.1000-0534.2019.00058

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