气象与环境学报2017，Vol.33Issue(4)：78-85,8.DOI:10.3969/j.issn.1673-503X.2017.04.010
西北地区极端高温变化及其对气候变暖停滞的响应
Changes in the extremely high temperature in Northwest China and its response to the stagnation of global warming
摘要
Abstract
Based on the daily maximum temperature data from the National Meteorological Information Center,the characteristics of extremely high temperature in Northwest China were analyzed in order to reveal some new fea-tures in extreme temperature in recent 20 ( from 1996 to 2015 ) and 55 years ( from 1961 to 2015 ) . The results show that except the southern parts of Xinjiang Uygur Autonomous region and Shaanxi province,the frequency of extremely high-temperature events in Northwest China generally increases from 1961 to 2015 . The high number of extreme event is mainly located in the southeastern Xinjiang Uygur Autonomous region,northern Qinghai prov-ince,western GanSu province,and central Ningxia province,with a linearly increasing number of extreme event more than 3. 00 per decade. Most of them pass 99. 5% or more significant tests. This is consistent with the charac-teristics of global warming. For the last 20 years (from 1996 to 2015),the frequency of extremely high-tempera-ture events increases in the west and south parts,and reduces in the east and north parts. This is consistent with that in the previous 20 years (1961-1980),but opposite to that in nearly 30 years (from 1981 to 2010) . In the past 55 years,the average number of extremely high-temperature events in Northwest China is on the rise with 1. 73 per decade,and that in the previous 20,nearly 30,and the last 20 years rises 0. 06,3. 90 and-0. 46 per decade,respec-tively. The decreasing trend in the number of extremely high-temperature events in the last 20 years is consistent with the stagnation status of global warming occurring after 1998 . It suggests that this decreasing trend is a kind of responses to the stagnation of global warming. Based on the typical temperature field analysis,it indicates that the abnormal variation in high temperature in Northwest China has a significant response to the change in sea surface temperature in the Indian Ocean and the Pacific Ocean. The distributions of temperature intensity both in extreme maximum temperature and in extremely high-temperature events in Northwest China are mainly related to the ele-vation above sea level,local topography,and the underlying surface properties.关键词
西北地区/极端高温/气候变暖/停滞/海拔高度Key words
Northwest China/Extremely high temperature/Climate warming/Stagnation/Elevation above sea level分类
天文与地球科学引用本文复制引用
曲姝霖,仝纪龙,唐睿,李佳芸..西北地区极端高温变化及其对气候变暖停滞的响应[J].气象与环境学报,2017,33(4):78-85,8.基金项目
兰州大学"本科教学工程"国家级大学生创新创业训练计划项目(201710730119)资助. （201710730119）
