摘要
从中国北方62个站的日平均温度出发,分析北方1951～2000年有霜冻(温度在零度以下)日数和强度的变化趋势;同时给出了秋冬交替时霜冻日开始日期和冬春转换时霜冻日结束日期的变化趋势.结果指出:在中国北方(30°N以北),有霜冻日的日数在近50年有明显的减少趋势,而霜冻日的平均温度显著升高;春季霜冻日的提前结束和秋季霜冻日的推迟来临使得北方冬季缩短而生长季拉长.年霜冻日平均温度与年平均温度存在显著的正相关关系,而无霜冻日温度的年平均值与平均温度关系达不到信度检验.这预示着区域温度的增暖主要体现在霜冻日温度的变化.
Based on daily mean temperature data from 62 stations of northern China since 1951, the trend of frost days and temperature has been analyzed, and the variation trend of the starting date in autumn and the ending date in spring have been shown. The results indicate an obvious reduction trend of frost days, an increase trend of frost-day temperature in northern China from 1951 to 2000, and the increasingly longer growth season due to early start date of spring and late ending date of autumn. We can also find a good relationship between frost-day temperature and mean temperature in the period, this may foreshow the variation of mean temperature is produced by frost-day temperature.
出处
《地理学报》
EI
CSCD
北大核心
2003年第z1期31-37,共7页
Acta Geographica Sinica
基金
国家重点基础研究发展规划项目"我国生存环境演变和北方干旱化趋势预测研究"(G1999043405)
中国科学院知识创新工程重大项目"西部生态环境演变规律与水土资源可持续利用研究"(KZCX1-10-07) ~~
关键词
霜冻日
气候变化
区域增暖
温度
中国
frost day
climate change
regional warming
trend
China
