SCIENTIA GEOGRAPHICA SINICA ›› 2020, Vol. 40 ›› Issue (9): 1573-1583.doi: 10.13249/j.cnki.sgs.2020.09.019

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Climatic Characteristics of Precipitation in North China from 1961 to 2017

Yang Ruozi(), Xing Pei, Du Wupeng*(), Dang Bing, Xuan Chunyi, Xiong Feilin   

  1. Beijing Municipal Climate Center, Beijing 100089, China
    Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089
  • Received:2019-12-05 Online:2020-09-10 Published:2020-12-05
  • Contact: Du Wupeng E-mail:ruoziyang@163.com;duwupeng@sina.com
  • Supported by:
    Climate Change Special Foundation of China Meteorological Administration (CCSF201914, CCSF202009), National Key Research and Development Project (2018YFC1507701), Science and Technology Project of Beijing Meteorological Bureau (BMBKJ201901010, BMBKJ201904002)

Abstract:

The climatic characteristics of precipitation in North China were reflected from the aspects of precipitation, precipitation intensity, precipitation days and precipitation contribution rate based on the homogenized precipitation data of 84 meteorological stations from 1961 to 2017 in North China. The results showed that the annual precipitation in North China decreased at a rate of 3.2 mm/10a from 1961 to 2017, which was mainly due to the decrease of summer precipitation, on the contrary, the precipitation in winter, spring and autumn increased. The trend of precipitation in the area with high precipitation value was decreasing, while that in the central and western regions and the northeast showed a weak increasing trend. The precipitation intensity showed an increasing trend, reaching the maximum in the 1990s and the 21st century (2011-2017), and the precipitation intensity in most areas had increased. The number of days and contribution rate of light rain, storm rain and heavy storm rain were decreasing, while those of moderate rain and heavy rain were increasing. The areas with decreasing precipitation days were mainly concentrated in Beijing-Tianjin-Hebei-Shanxi region, which were 34-42° N and 110-120° E. By analyzed the contribution rate of different levels of precipitation to the spatial distribution of North China, we could knew that the contribution of light rain to the precipitation in the western part of North China was the most important, and the contribution of heavy rain, storm rain and heavy storm rain to the precipitation in the southeast part of North China was the most important, which further explained the fact that the decrease of light rain, storm rain and heavy storm rain and the precipitation of above magnitude resulted in the decrease of the total precipitation in the western and southeast part of North China. The research on the characteristics of precipitation climate in North China can provide scientific support for regional climate change, rainstorm, drought and other disasters.

Key words: North China, precipitation, precipitation intensity, precipitation days, precipitation contribution rate

CLC Number: 

  • P467