摘要
使用近43年来青藏高原76个站点的逐日气温资料(日平均气温、日最高气温和日最低气温),较为详细地分析了近几十年青藏高原气温变化和四季起止日期变化的时空分布特征。结果表明,1974—2016年以来青藏高原大部地区无论是平均气温还是最高气温和最低气温整体上呈上升趋势,最低气温上升速度比最高气温要快,使得气温日较差呈减小趋势。其次,从四季主要的变化特征来看,近几十年里青藏高原冬季开始日期推迟,时长缩短;春季开始日期提前显著,时长略有增加;夏季开始日期提前,时长有显著的增长趋势;秋天则表现为推迟和缩短现象。所以气候变化的影响正深刻改变着高原近地面的温度和四季的更替。
Using the daily temperature data(daily average,maximum and minimum temperature)from 76 stations on the Qinghai-Xizang Plateau over the past 43 years,the temporal and spatial distribution characteristics of changes in temperature as well as onset and ending time of the four seasons on the Qinghai-Xizang Plateau over recent de-cades were analyzed in detail.The results showed that most areas of the Qinghai-Xizang Plateau had experienced an upward trend in the average,maximum and minimum temperature from 1974 to 2016,with the minimum tempera-ture rising faster than the maximum temperature,leading to a downward trend in the daily temperature range.Be-sides,according to the main characteristics of seasonal changes on the Qinghai-Xizang Plateau over recent decades,winter and autumn experienced delayed onset and shortened duration while spring experienced significantly ad-vanced onset and sightly increased duration,and summer experienced advanced onset and significantly increased duration.In consequence,the impacts of climate change are profoundly changing the temperature and the seasonal transitions of the plateau near-face.
作者
拉巴果杰
达确
次旺平措
索片
久美南加
Laba GuoJie;Daque;Ciren Pingcuo;Suopian;Jiumei NanJia(Bange Meteorological Bureau,Xizang Autonomous Region,Nakchu 852500,China;Dingri Meteorological Bureau,Xizang Autonomous Region,Shigatse 858200,China;DingJie Meteorological Bureau,Xizang Autonomous,Shigatse 857900,China)
出处
《西藏科技》
2025年第5期35-43,共9页
Xizang Science And Technology
基金
海南省气象局2023年科研市县专项项目(HNQXSX202302)。
关键词
青藏高原
气温变化
季节起止时间
四季时长
Qinghai-Xizang Plateau
Temperature changes
Seasonal onset and ending time
Seasonal duration
