摘要
利用1961—2004年宁夏逐日最高、最低气温资料,分析了宁夏44a来最高、最低气温的变化趋势。结果表明:宁夏的最高、最低气温表现出了明显的变化趋势,最高气温<0℃的日数减少,>30℃的日数增加;在年平均最低气温升高的同时,极冷日数也在增加,相对于1961—1990年的平均值,20世纪90年代和21世纪最初的4a年极冷日数分别增加了1.1d和0.7d,距平百分率分别达350%和275%。
The trends in daily frequency of maximum and minimum temperatures over the last 44 years were analyzed using the daily maximum and minimum temperature data from 1961 to 2004 in Ningxia, by classifying the temperatures into 38 levels. It was found that daily frequency of maximum temperature below 0℃ decreased while that over 30℃ increased. The annual average minimum temperature increased, meanwhile the daily frequency of extremely low temperature also increased by 350%-275% in 1991-2004 relative to 1961-1990. Therefore, the extreme trends of temperature are obvious in Ningxia.
出处
《气候变化研究进展》
CSCD
2008年第2期73-77,共5页
Climate Change Research
基金
科技部公益性基金项目“宁夏气候对全球气候变化的响应及其机制”(2004DIB3J121)
中国气象局气候变化专项(CCSF2007-27)
中英科技合作项目“气候变化对中国农业影响(II)”(2001-BA611B-04-06-01)资助
关键词
气候变化
频率
最高气温
最低气温
宁夏
climate change
frequency
maximum temperature
minimum temperature
Ningxia
