| 摘要: |
| 基于2014年和2017年的Landsat8影像,本研究利用辐射传输方程反演了东莞市地表温度,并应用景观指数和转移矩阵分析了东莞市2014-2017年热环境的变化动态。结果表明,热强度指数大于0.25或小于等于-0.25的区域定为极温区,符合东莞市实际情况；东莞市相邻热环境区的地表温差从2.94℃减至2.77℃,热岛强度有所减弱；高温区对热环境格局的影响平稳地趋向缩减；各热环境区存在15.7%-29.4%面积变化,其向中温区方向转化的趋势明显； |
| 关键词: Landsat8 热环境 转移矩阵 景观指数 |
| DOI： |
| 分类号: |
| 基金项目:东莞市森林生态效益监测网络体系建设研究 |
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| Study on the Dynamicsof Dongguan’s Thermal Environment Based on Landsat8 |
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wuzhenbiao,HUAN Lianzhong,XU Qinghua and SHEN Decai
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Dalingshan Forest Park Management Department,Dalingshan Forest Park Management Department,Dalingshan Forest Park Management Department,Dongguan Research Institute of Forestry
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| Abstract: |
| Based on the Landsat8 image of 2014 and 2017,the Land Surface Temperature of Dongguan was computed by Radiative Transfer Equation. The dynamics of Dongguan"s Urban Thermal Environment was analyzed by applying Landscape Metrics and Transfer Matrix. The results showed that, it was in accordance with the real situation of Dongguan that the area with hot index more than 0.25 or less than -0.25 was set as the extreme temperature zone; Compared with 2014,in 2017, the surface temperature difference in adjacent thermal environment decreased from 2.94℃ to 2.77℃, which leaded to fewer effects of heat island and the high temperature zone made less impact on Urban Thermal Environment, with the trending toward median zone that each temperature zone had 15.7%-29.4% change in area. |
| Key words: Landsat8 Urban Thermal Environment TransferMatrix Landscape Metrics |
