中国近50a来度日变化的研究

A Study on Degree-day's Change in China in the Past Fifty Years

采用中国1951—2006年的气象观测资料,在运用度日分析法分析全国、各省及省会城市近50 a的平均温度变化的基础上,系统分析全国的度日变化情况;研究了中国六大区省会城市热度日(Heating Degree-day,HDD)和冷度日(Cooling Degree-day,CDD)的变化情况;分析了典型城市北京、上海、广州CDD的上升趋势和上升率,并求得相关方程。结果表明,北京、上海、广州CDD的长期变化都呈上升趋势,上升率分别为11.7℃/(10 a)、10.4℃/(10 a)、25.1℃/(10 a)。

Based on the weather observation data from 1951 to 2006,the paper analyzed the degree-day＇s change in the whole country by calculating mean temperature changes in the past 50 years in China,all the provinces and the capital cities.The paper studied changes of HDD（Heating Degree-day） and CDD（Cooling Degree-day） in capital cities of China,especially the CDD Change in typical cities,namely,Beijing in the north,Shanghai in the east and Guangzhou in the south of China,and finally brought in an equation.The result shows that there is an increasing trend in CDD in all the three cities of Beijing,Shanghai and Guangzhou,at the rates of 11.7 ℃,10.4 ℃ and 25.1 ℃ per decade,respectively.