摘要
利用华南区域110个气象站1961―2008年逐日平均气温资料,计算华南区域各地年降温度日和采暖度日,分析降温度日和采暖度日的时空变化特征,探讨度日与年平均气温的关系。结果表明:华南区域年降温度日具有南部大、北部小,河谷平原大、山区小的地域分布特点;年采暖度日则是由南向北增大。1961―2008年华南区域年降温度日呈现显著上升趋势,1983年以后较前22年增加,其中1998年以后增加最明显;而年采暖度日呈现显著下降趋势,1986年以后较前25年减小,其中1997年以后减小最明显。年降温度日和采暖度日与年平均气温具有较高的相关性,预估随着气候增暖,降温度日将趋于增大,而采暖度日将趋于减小。
With the daily mean temperature data form 1961 to 2008 at 110 meteorological stations in South China, the annual cooling degree days and the annual heating degree days are calculated, their spatio-temporal variation characteristics are analyzed, and the relationship between degree days and annual mean temperature is investigated. The results show that the geographic distribution characteristics of annual cooling degree days in South China are that they are larger in southern part while smaller in northern part, larger in valleys and plains while smaller in mountain areas. As for annual heating degree days, they are getting larger from south to north. The annual cooling degree days tend to increase significantly since 1983, especially, the increase trend has been more obvious since 1998. Contrarily, the annual heating degree days tend to decrease since 1986, and the decrease trend has been more obvious since 1997. There is high correlationship between annual cooling degree day, heating degree day and annual mean temperature. It is expected that the cooling degree days would be increasing with global warming, while the heating degree days decreasing.
出处
《热带地理》
北大核心
2011年第1期14-20,共7页
Tropical Geography
基金
中国气象局气候变化专项(CCSF-09-11
CCSF-09-03)
广西科学基金项目(桂青科0991060)
关键词
华南
降温度日
采暖度日
时空分布
变化趋势
South China
cooling degree day
heating degree day
spatiotemporal distribution
variation trend
