摘要
选取1961—2015年东北地区逐日最高、最低气温资料,在最高自由度下探讨了区域最高、最低气温的变化趋势及年代际分布特征。结果表明:东北地区年平均最高、最低气温分布受地形影响显著,具有良好的空间一致性,最高气温空间分布纬向特征较强,最低气温局地性特征较强;时间演变以1997年为节点呈现"先升后降"的趋势,1980—1997年全区呈现一致升温趋势,为第一空间分布类型; 1998—2015年呈现"北增南减"趋势,为第二空间分布类型;最高、最低气温概率密度曲线1997年后均整体向高值区移动; 1990年后极端高温出现概率有增加趋势,而极端低温相应减少。
Using the daily data from 162 weather stations,the spatial and temporal variations of maximum and minimum surface air temperature in Northeast China were studied under the highest level of freedom condition for the period from 1961 to 2015.The results show that the distribution of annual mean maximum and minimum air temperature are significantly affected by topography.It has good spatial consistency.The spatial distribution of the maximum temperature shows significantly zonal characteristics,while that of the minimum temperature shows local characteristics.The temporal trend exhibits an initial increasing and then changes to decreasing trend,and the transition point appears in 1997.From 1980 to 1997,the temperature shows an increased trend over the entire region,representing the first spatial distribution pattern.From 1998 to 2015,the temperature shows an ＂increasing in the north and decreasing in the south＂ trend,representing the second spatial distribution pattern.The probability density curves of the maximum and minimum temperatures move to high-value areas after 1997.After 1990,the probability of extremely high temperature shows an increasing trend,while that of extremely low temperature is a decreasing trend.
作者
侯依玲
刘鸣彦
张海娜
赵春雨
HOU Yi-ling;LIU Ming-yan;ZHANG Hai-na;ZHAO Chun-yu(Shenyang Regional Climate Center,Shenyang,110166,China;Institute of Atmospheric Environment,China Meteorological Administration,Shenyang,110166,China)
出处
《气象与环境学报》
2018年第5期93-99,共7页
Journal of Meteorology and Environment
基金
中国气象局沈阳大气环境研究所开放基金(2016SYIAE08)
中国气象局气候变化专项(CCSF201609
CCSF201526)共同资助
关键词
最高气温
最低气温
极端气候
Maximum temperature
Minimum temperature
Extreme events
