东莞市区热力场与植被覆盖关系动态分析  

Dynamic analysis on relationship between surface heat status and vegetation coverage of Dongguan urban

作　　者：苏雅丽[1] 杨燕琼[1] 

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642

出　　处：《广东农业科学》2015年第22期187-192,共6页Guangdong Agricultural Sciences

基　　金：广东林业科技计划项目(2012-07)

摘　　要：用2003年和2013年东莞市区Landsat TM卫星的热红外波段数据建模,定量反演地温,研究东莞市热力场与植被指数的动态变化。结果表明:(1)东莞市区绿岛区域分布集中,其他热力场类型分布相对分散;(2)2003年热力场以中绿岛为主,2013年以弱绿岛为主,热岛效应呈缓和趋势;(3)东莞市区的南部、东部、西部植被覆盖多,中部、北部植被覆盖少;(4)2013年东莞市区植被覆盖面积比2003年增加1.35%,10年来植被覆盖率增幅不大,2013年植被覆盖率44.70%,植被指数高的地区表现为绿岛区,植被指数可反映城市的热岛效应状况。Thermal infrared image from Landsat satellites was used to derive land surface temperatures （ LST ） and to calculate the intensity of surface urban heat island （ UHI ） and normalized difference vegetation index from 2003 to 2013 in Dongguan urban （ Guangdong Province ） . The results showed that the obvious regional distribution of urban heat island effect in Dongguan urban was relatively dispersed while the other temperature regions are distributed more concentrated. The thermal landscape in Dongguan urban was medium green island in 2003 while in 2013 the weak green island was most obviously, the whole state of UHI presented easing trend. Since the ten years, the southern, the east and west part of Dongguan urban vegetation cover was much, while the central and northern vegetation cover was little. The vegetation coverage raised up but not much, the rate of vegetation coverage in 2013 increased by 1.35% than 2003, the rate of vegetation coverage in study area was 44.70% in 2013, the low temperature area occured in the higher vegetation index place, and NDVI could reflect the urban heat island effect state.

关 键 词：东莞 热岛效应 遥感 植被覆盖 

分 类 号：P463.3[天文地球—大气科学及气象学]