利用气象台站数据分析北京城郊气温和城市热岛(UHI)强度的年变化及风速对北京UHI的影响;同时分析北京5个城市站点UHI在不同季节的日变化特征。结果表明,近44 a来北京市区与郊区的多年平均气温和UHI强度均呈增加的趋势。风速的降低促进北京城区的UHI出现增加趋势。风速对UHI的季节变化影响也很显著。2005年北京UHI日变化呈现了明显的夜间强,午间弱的特征,尤以天安门和公主坟站点的UHI日变化明显;冬季UHI强度比其他季节相应时次的UHI都强,且冬季UHI日变化幅度最大,夏季日变化幅度最小。
The annual variation of intensity of urban heat island (UHI), the impact of wind speed on UHI, and the diurnal variations of five urban sites in different seasons were studied in the paper by using the meteorological data. The result shows that annual average temperature appears an increasing trend in Beijing urban and suburb areas for the past 44 years. The intensity of UHI also shows an increasing trend. There is a negative correlation between the UHI and synchronous wind speed in Beijing region, and the decrease of wind speed led to the increase of UHI intensity. Results also show that diurnal change of UHI of Beijing is significant in 2005, the UHI is strong at nigh and week in the noon. The strongest UHI appears generally in winter seasons and the amplitude of UHI diurnal variation in winter is the largest, and the smallest in summer.
[1] Wang W C,Zeng Z M,Thomas R K.Urban heat islands in China[J].Geophysical Research Letters,1990,17:2377-2380.
[2] Weng Q H,Yang S H.Managing the adverse thermal effects of urban development in a densely populated Chinese city[J].Journal of Environmental Management,2004,70:145-156.
[3] 任永建,陈正洪,肖 莺,等.武汉区域百年地表气温变化趋势研究[J].地理科学,2010,30(2):278~282.
[4] Rizwan A M,Dennis Y C L,LIU C H,et al.A review on the generation, and mitigation of Urban Heat Island[J].Journal of Environmental Sciences, 2008,20:120-128.
[5] 岳文泽,徐丽华.城市土地利用类型及格局的热环境效应研究——以上海市中心城区为例[J].地理科学,2007,27(2) 243~248.
[6] 苏伟忠,杨英宝,杨桂山.南京市热场分布特征及其与土地利用/覆被关系研究[J].地理科学,2005,25(6): 697~703
[7] 邓玉娇,匡耀求,黄宁生,等.温室效应增强背景下城市热环境变化的遥感分析——以广东省东莞市为例[J].地理科学,2008,28(6):814~819.
[8] 赵云升,杜 嘉,宋开山,等.基于卫星遥感的夏季长春市城区热场分析[J].地理科学,2006,26(1):70~74.
[9] Gaffin S R,Rosenzweig R,Khanbilvardi R,et al.Variations in New York city’s urban heat island strength over time and space[J].Theoretical and Applied Climatology,2008,94:1-11.
[10] Zeng Y,Qiu X F,Gu L H.The urban heat island in Nanjing[J].Quaternary International,2009, 208:38-43.
[11] 郑祚芳,刘伟东,王迎春.北京地区城市热岛的时空分布特征[J].南京气象学院学报,2006,29(5):694~699.
[12] Zhang Jiahua,Hou Yingyu,Li Guicai,et al.The diurnal and seasonal characteristics of urban heat island variation in Beijing city and surrounding areas and impact factors based on remote sensing satellite data[J].Science In China Series D(Earth Sciences), 2005, 48(Supp.II):220-229.
[13] 林学椿,于淑秋.北京地区气温的年代际变化和热岛效应[J].地球物理学报,2005,48(1):39~45.
[14] Gedzelman S D,Austin S,Cermak R,et al.Mesoscale aspects of the Urban Heat Island around New York City[J].Theoretical and Applied Climatology,2003,75:29-42
[15] 谢 庄,崔继良,陈大刚.北京城市热岛效应的昼夜变化特征分析[J].气候与环境研究,2006,11(1):69~75.
[16] 林学椿,于淑秋,唐国利.北京城市化进程与热岛强度关系的研究[J].自然科学进展,2005,15(7):882~886.
[17] 张佳华.城市热环境遥感[M].北京:气象出版社,2010.
[18] 刘 宇,匡耀求,吴志峰,等.不同土地利用类型对城市地表温度的影响——以广东东莞为例[J].地理科学,2006,26(5) : 597~602.
[19] 武鹏飞,王茂军,张学霞.北京市植被绿度与城市热岛效应关系研究[J].北京林业大学学报,2009,31(5):54~60.