遼寧中部城市群度日的變化特征

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遼寧中部城市群度日的變化特征
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基金項(xiàng)目:國(guó)家自然科學(xué)基金（40605007）；國(guó)家重點(diǎn)基礎(chǔ)研究973項(xiàng)目（2004CB418507-1）；中央公益性項(xiàng)目。

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

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利用1951—2006年遼寧中部城市群沈陽、撫順、本溪、鞍山4城市逐日氣溫資料，分析各城市熱度日HDD和冷度日CDD的變化規(guī)律，并探討度日與平均氣溫及城市熱島強(qiáng)度等的關(guān)系。結(jié)果表明：遼寧中部城市群HDD和CDD最大值分別出現(xiàn)在1月和7月。4城市HDD年際變化均呈下降趨勢(shì)；CDD年際變化沈陽和鞍山呈微弱的上升趨勢(shì)，而撫順和本溪呈微弱的下降趨勢(shì)。自1950s始至21世紀(jì)的2006年，除撫順外，其他各城市HDD年代際變化均表現(xiàn)為明顯的下降趨勢(shì)，而CDD年代際變化均表現(xiàn)為降—升—降的規(guī)律。年代HDD均值與年代平均氣溫呈反位相，而年代CDD均值與年代平均氣溫呈正位相，冬季HDD與城市熱島強(qiáng)度呈負(fù)相關(guān)。

Abstract:

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.

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李麗光,王宏博,趙先麗,周廣勝,王笑影.遼寧中部城市群度日的變化特征.氣象科學(xué),2010,(3):387-392 Li Liguang, Wang Hongbo, Zhao Xianli, Zhou Guangsheng, Wang Xiaoying. Degree-day characteristics in the city group of middle Liaoning province. Journal of the Meteorological Sciences,2010,(3):387-392

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收稿日期:2009-02-08
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