基于Landsat8的唐山市地表温度反演

Retrieval of Surface Temperature in Tangshan City Based on Landsat8

为研究唐山市地表温度变化情况,运用ENVI软件,以Landsat8影像为数据源研究唐山市2017年、2018以及2016年、2017地表温度特点。运用辐射传输方程法来进行地表温度反演,最后对反演结果进行热岛效应强度划分。结果表明:唐山市夏季热岛效应较为严重,范围比较大,其中市区最为严重。通过增加城市绿化面积、水量可在一定程度上应对热岛效应。冬季热岛效应并不明显。总体而言唐山市热岛面积所占比例较大,其中主要是弱热岛和中等热岛,这2种类型的热岛在城市和裸地分布广泛。

In order to study the changes in surface temperature in Tangshan in recent years,ENVI software was used to study the characteristics of surface temperature in Tangshan in summer 2017,summer 2018,winter 2016 and winter 2017 by using Landsat8 images as the data source.The radiation transfer equation method was used to invert the surface temperature,and finally the intensity of the heat island effect was divided into the inversion results.The results show that the summer heat island effect in Tangshan City is much more serious,the area is relatively large,and the urban area is the most serious.Increasing the green area in cities and increasing the amount of water can cope with the heat island effect to a certain extent.The heat island effect in winter is not obvious.The area of heat islands in Tangshan City takes up a large proportion,mainly including weak heat islands and medium heat islands.These two types of heat islands are widely distributed in cities and bare land.