摘要
利用MODIS/Aqua地表温度产品(MYD11A1)分析了2003—2013年环太湖城市地表温度和地表城市热岛的时空变化特征,研究了地表城市热岛与大气稳定度、土地利用类型的关系。结果表明,该区域在2003—2013年日间的不稳定类天数最多,约占总天数50%。不稳定类天数在2003—2010年呈增加趋势,2010年后呈减少趋势;中性类与不稳定类天数年变化的位相相反,与弱不稳定类天数年变化的位相大致相同。受云和降水影响,MODIS图像质量随着不稳定度的降低而降低。日间地表城市热岛在不稳定大气边界层条件下最强,城市热岛强度随着白天边界层不稳定度的降低而减弱。近10年来环太湖城市圈经济发展迅速,城市用地面积增加,2010年环太湖城区的地表温度较2004年普遍升高约1℃,部分新城区的地表温度升高3℃以上,高温范围扩大,形成一条环太湖的高温带,分析地表温度和城市热岛的时空变化对研究城市化带来的区域气候效应具有重要意义。
Based on MODIS/Aqua LST product（ MYD11 A1）,the temporal-spatial characteristics of land surface temperature（ LST） and urban heat island（ UHI） from 2003 to 2013 were analyzed,and the relationships between UHI and atmospheric stability,land use covers was studied in Lake Tai Basin. The results showthat the number of days of unstable stability class in the region is the largest in the daytime,accounting for 50% of the total number of days and it increases from 2003 to 2010,and then decreases since 2010. The annual variation of neutral class is consistent with the variation of slightly unstable class,while it is opposite to the variation of unstable stability class. The quality of MODIS images decreases as the atmospheric stability changes from unstable to neutral class. The phenomenon of UHI in the urban area is evident under unstable stability,and the UHI intensity decreases as the atmospheric stability turns to neural stability. Due to the fast economic development in Suzhou,Wuxi and Changzhou which leads to the urban area expansion over the last decade,the annual average LST in 2010 is about1 ℃ higher and in some newly-built urban area it is up to 3 ℃ higher than that in 2004. Since the area of high LST area expands widely forming a high-temperature zone around Lake Tai,it is important to analyze the temporal-spatial changes of LST and UHI to study the regional climate effect caused by urbanization.
作者
赵亚芳
张宁
陈燕
朱焱
ZHAO Yafang ZHANG Ning CHEN Yan ZHU Yan(Changzhou Environmental Monitoring Center, Changzhou 213001, China CMA-NJU Joint Laboratory for Climate Prediction Studies, Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China Jiangsu Climate Center, Nanjing 210002, China Suzhou Meteorological Bureau, Suzhou 215021, China)
出处
《高原气象》
CSCD
北大核心
2017年第5期1394-1403,共10页
Plateau Meteorology
基金
国家重点研发计划项目(2016YFA0600303)
国家自然科学基金项目(41375014,51538005)
关键词
MODIS
地表温度
地表城市热岛
大气稳定度
时空变化
MODIS
Land surface temperature
Urban heat island
Atmospheric stability
Temporal-spatialvariation
