辽宁中部城市群度日的变化特征  

Degree-day characteristics in the city group of middle Liaoning province

作　　者：李丽光[1] 王宏博[1] 赵先丽[1] 周广胜[1,2] 王笑影[1] 

机构地区：[1]中国气象局沈阳大气环境研究所,沈阳110016 [2]中国科学院植物研究所植被数量生态学重点实验室,北京100039

出　　处：《气象科学》2010年第3期387-392,共6页Journal of the Meteorological Sciences

基　　金：国家自然科学基金(40605007);国家重点基础研究973项目(2004CB418507-1);中央公益性项目

摘　　要：利用1951—2006年辽宁中部城市群沈阳、抚顺、本溪、鞍山4城市逐日气温资料,分析各城市热度日HDD和冷度日CDD的变化规律,并探讨度日与平均气温及城市热岛强度等的关系。结果表明:辽宁中部城市群HDD和CDD最大值分别出现在1月和7月。4城市HDD年际变化均呈下降趋势;CDD年际变化沈阳和鞍山呈微弱的上升趋势,而抚顺和本溪呈微弱的下降趋势。自1950s始至21世纪的2006年,除抚顺外,其他各城市HDD年代际变化均表现为明显的下降趋势,而CDD年代际变化均表现为降—升—降的规律。年代HDD均值与年代平均气温呈反位相,而年代CDD均值与年代平均气温呈正位相,冬季HDD与城市热岛强度呈负相关。Based on the maximum and minimum air temperature data from 1951 to 2006 in the city group of middle Liaoning province,including Shenyang,Fushun,Benxi and Anshan,the monthly,inter-annual and inter-decadal variations of heating degree-day（HDD） and cooling degree-day（CDD） were analyzed.The relationships between degree-day and mean air temperature as well as urban heat island effect were discussed.The results indicate that the highest HDD appears in January in the city group of middle Liaoning province,and the highest CDD is in July.Inter-annual variations of HDD in four cities are the decreasing tendency.Inter-annual variations of CDD in Shenyang and Anshan are the weak increasing tendency,while they are the weak decreasing tendency in Fushun and Benxi.Inter-decadal variations of HDD take on the obvious decreasing tendency,except in Fushun,while those of CDD have increasing-decreasing-increasing rule since 1950s.The relationship between mean inter-decadal HDD and mean inter-decadal air temperature is negative,while the relationship between inter-decadal CDD and mean inter-decadal air temperature is positive.HDD and urban heat island intensity is the negative correlation.

关 键 词：热度日 冷度日 阈值温度 

分 类 号：P463[天文地球—大气科学及气象学]