Spatio-temporal patterns of temperature extremes and their response to atmospheric circulation factors in China from 1961 to 2020  

1961-2020年中国极端气温的时空模式及其对大气环流因子的响应

作　　者：LUO Yuanbo ZHOU Yuke ZHOU Chenghu 罗远波;周玉科;周成虎

机构地区：[1]State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,CAs,Beijing 100101,China

出　　处：《Journal of Geographical Sciences》2024年第10期1883-1903,共21页地理学报（英文版）

基　　金：National Key Research and Development Program of China,No.2021YFB3900900。

摘　　要：Changes in surface temperature extremes have become a global concern.Based on the daily lowest temperature(TN)and daily highest temperature(TX)data from 2138weather stations in China from 1961 to 2020,we calculated 14 extreme temperature indices to analyze the characteristics of extreme temperature events.The widespread changes observed in all extreme temperature indices suggest that China experienced significant warming during this period.Specifically,the cold extreme indices,such as cold nights,cold days,frost days,icing days,and the cold spell duration index,decreased significantly by-6.64,-2.67,-2.96,-0.97,and-1.01 days/decade,respectively.In contrast,we observed significant increases in warm extreme indices.The number of warm nights,warm days,summer days,tropical nights,and warm spell duration index increased by 8.44,5.18,2.81,2.50,and 1.66d/decade,respectively.In addition,the lowest TN,highest TN,lowest TX,and highest TX over the entire period rose by 0.47,0.22,0.26,and 0.16℃/decade,respectively.Furthermore,using Pearson's correlation and wavelet coherence analyses,this study identified a strong association between extreme temperature indices and atmospheric circulation factors,with varying correlation strengths and resonance periods across different time-frequency domains.

关 键 词：temperature changes global warming atmospheric circulation wavelet coherence analysis China 

分 类 号：P467[天文地球—大气科学及气象学] P434