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| 基于Landsat TM/ETM＋数据的北京城市热岛季节特征研究 | |
| 引用本文： | 杨沈斌,赵小艳,申双和,海玉龙,方永侠.基于Landsat TM/ETM＋数据的北京城市热岛季节特征研究[J].南京气象学院学报,2010,33(4):427-435. |
| 作者姓名： | 杨沈斌 赵小艳 申双和 海玉龙 方永侠 |
| 作者单位： | 1. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044;南京信息工程大学,应用气象学院,江苏,南京,210044 2. 南京信息工程大学,应用气象学院,江苏,南京,210044 3. 南京信息工程大学,应用气象学院,江苏,南京,210044;北京市气象局,北京,100089 |
| 基金项目： | 2007年城市气象科学研究基金，国家科技支撑计划课题，南京信息工程大学科研启动基金，2009年农业气象重点实验室开放基金项目 |
| 摘 要： | 利用1988—2006年20景LandsatTM和ETM＋数据分析了北京市城市热岛的季节变化特征。通过反演地表温度,建立统一的城市和农村区域,计算了城市热岛强度,并采用多项式拟合获取了城市热岛强度的季节变化曲线;同时,分析了热岛强度季节特征与气候因子的关系。另外利用4景2005—2006年不同季节Landsat TM影像,分析了不同季节城市热岛的空间变化特征,并选择穿越北京城区的两条不同方向剖线（SE-NW和SW-NE）,分析了沿剖线方向城市热岛与地表类型的关系。结果显示,北京城市热岛具有明显的季节变化特征,与总云量的季节变化关系显著。最大热岛强度出现在夏季,呈现片状发散和零星热岛并存的空间分布特征。冬季为冷岛特征,其空间分布与夏季热岛一致。春秋两季热岛强度最小,但春季热岛空间差异较大。在相同季节,城市热岛强度和空间尺度在不同剖线方向具有明显的差异,这与不同地类的空间分布有关。 |
| 关 键 词： | 城市热岛 热红外遥感 土地利用 |
Characteristics of Urban Heat Island Seasonal Pattern in Beijing Based on Landsat TM/ETM+Imagery |
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| YANG Shen-bin,ZHAO Xiao-yan,SHEN Shuang-he,HAI Yu-long,FANG Yong-xia.Characteristics of Urban Heat Island Seasonal Pattern in Beijing Based on Landsat TM/ETM+Imagery[J].Journal of Nanjing Institute of Meteorology,2010,33(4):427-435. | |
| Authors: | YANG Shen-bin ZHAO Xiao-yan SHEN Shuang-he HAI Yu-long FANG Yong-xia |
| Institution: | 2 (Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing 210044, China; 2. School of Applied Meteorology,NUIST,Nanjing 210044,China; 3. Beijing Meteorological Bureau, Beijing 100089, China) |
| Abstract: | Twenty Landsat TM and ETM＋ images between 1988 and 2006 were used to analyze the characteristics of Urban Heat Island（UHI） seasonal pattern in Beijing. Firstly ,land surface temperature （LST） was retrieved from each image and vector data corresponding to urban and rural areas were ob- tained by using ancillary data. Then, the UHI intensity was calculated according to the difference of av- erage LST between urban and rural areas, based on which polynomial was fitted to retrieve the UHI sea- sonal pattern. The relationship between the seasonal variation of UHI and climatic factors was also stud- ied. In addition, four scenes of Landsat TM images between 2005 and 2006 were selected to analyze the spatial pattern of UHI in different seasons, with two profiles （SE-NW and SW-NE） across the city of Beijing to study the relationship between land use types and UHI. The results show that the UHI in Bei- jing displays remarkable differences in seasonal patterns and has obvious relationship with the amount of clouds. The UHI intensity reaches its maximum value in summer and falls to the minimum value in both spring and autumn seasons. However, the UHI intensity is negative in winter, which is commonly referred to as the Urban Cool Island（UCI）. Both the UHI in summer and UCI in winter show a contigu- ous and scattered spatial distribution pattern, which does not appear in spring and autumn. It is also con- cluded that the intensity and size of UHI vary in different profiles because of different land use and land cover types. |
| Keywords: | urban heat island thermal infrared range remote sensing land use and land cover type |
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