Characteristics of temperature and precipitation changes in Beichuan County in the last 30 years
Based on the monthly temperature data of Beichuan County from 1992 to 2019,the monthly precipitation data from 1992 to 2022,the variations of temperature and rainfall of Beichuan County are analyzed by linear trend analysis,Mann-Kendall test.The results show that from 1992-2019,the average annual and seasonal mean temperature show an increas-ing trend,the increasing slope for average annualtemperature is 0.36℃/10a,the average annual temperature changed ab-ruptly in 1998,2001,2004,and 2005,and seasonal average temperatures exhibit periodic variation characteristics;From 1992-2022,the average annual precipitation in Beichuan County was886.3 mm,showing an increasing trend,and the in-creasing slope forprecipitation is 3.9 mm/10a,The increase in precipitation was mainly due to the increased frequency of heavy rainstorms,annual precipitation changed abruptly in 2013 and 2016,and it exhibits periodic characteristics;heavy rainfall weather occurs mainly in summer,and shows a continuous increasing trend;The temperature have a positive correla-tion with precipitation.The research results can provide the theoretical support for geological disaster prevention in Beichuan.
NETL
NSTL
万方数据
