Analysis of Changing Trend of Summer Precipitation in North China

作     者：Wei LIU 

作者机构：Ulanqab Meteorological BureauUlanqab 012000China 

出 版 物：《Meteorological and Environmental Research》 (气象与环境研究（英文版）)

年 卷 期：2024年第15卷第4期

页      面：15-20,23页

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

主　　题：North China Summer precipitation Trend analysis 

摘      要：Based on the reanalysis data of the National Center for Environmental Prediction(NCEP)and the precipitation dataset of the *** Prediction Center(CPC),the changing trend of summer precipitation in North China(35°-40°N,110°-125°E)during 1979-2020 was *** calculating the monthly climatic precipitation in North China,it is found that precipitation was mainly distributed from June to August,so the trend of precipitation in North China from June to August was mainly ***,the five-point moving average of regional mean precipitation in North China from June to August during 1979-2020 was *** is found that the fitting curve of the five-point sliding average was basically consistent with the changing trend of regional precipitation,and it showed a certain upward ***,the cumulative anomaly of regional average summer precipitation in North China showed a significant upward trend after 2005,which was similar to the moving average result,indicating that the precipitation in the later period increased compared with the earlier *** changing trend of summer precipitation in North China in the past 42 years was analyzed,and the results show that precipitation showed a significant increasing trend in most areas of North China,so that regional average precipitation also tended to increase *** comparing the precipitation in the past five years(2016-2020)and the last 36 years(1979-2015),it is found that the increase of summer precipitation in North China was more obvious,so the reasons for the increase in precipitation were further *** the occurrence of precipitation requires favorable thermal dynamic conditions,the one-dimensional linear regression of water vapor content at 850 hPa and meridional wind speed was conduced,and it is found that the two variables tended to increase obviously,which was consistent with the increasing trend of *** from both the results of regional average and the spatia