摘要
利用1951～2002年全国733个台站的月平均最高、最低气温资料,对我国年、季平均最高、最低气温变化趋势的空间分布状况和时间变化特征进行了分析.结果表明:近52年来,我国平均最高气温的变化特征呈现北方增暖明显、南方变化不明显或呈弱降温趋势;年平均最低气温全国各地基本一致,呈明显的变暖趋势;无论是年还是季,平均最低气温的增暖幅度明显大于平均最高气温的增幅;我国年平均日较差多呈下降趋势,并在我国北方地区尤为明显,各季平均日较差亦均呈下降趋势,并以冬季的下降幅度为最大;年平均最高气温和最低气温的变化在年代际变化上基本呈现较为一致的步伐,即52年来主要的变暖均是从20世纪80年代中期开始,均在90年代后期达到了近52年来的历史新高,近年来又略有回落.
Based on monthly averaged surface air temperature data of 600 stations in China during 1951-2002, the spatial and temporal distributions of trends for mean maximum and minimum temperatures, as well as the daily temperature range are studied. Increasing trends of mean maximum temperatures are found in northern China, while weak decreasing or no obvious trends are detected in southern China. Mean minimum temperatures have increased all over China. Generally, increase in mean minimum temperatures is more dominant that that in maximum temperatures. As a result, annual mean diurnal range in temperature has decreased, especially in winter in northern China. Further analysis suggests variations in mean maximum and minimum temperatures are generally consistent, with the warming trends starting in the mid-1980s and the peaks in the late 1990s
出处
《气候与环境研究》
CSCD
北大核心
2005年第4期728-735,共8页
Climatic and Environmental Research
基金
中国气象局气候变化专项CCSF2005-2-QH08
关键词
最高气温
最低气温
气温变化
maximum temperature, minimum temperature, temperature change
