基于ETM+热红外波段的寻甸地区热环境遥感研究

Thermal Environment Remote Sensing of Xundian Region based on ETM + Thermal Infrared Band

应用基于影像的反演算法对2010年1月30日和2014年1月25日的Landsat 7 ETM+卫星资料,反演昆明市寻甸县的地表温度,分析寻甸县冬季地表热环境时空演变特征。结果表明:空间上,寻甸县冬季地表热环境具有明显差异性,热岛区的分布从分散分布到集中分布,并远离城区;时间上,2014年较2010年主城区的热岛效应有所减弱,但其它非城区部分热岛效应相对变强,且相对集中于研究区以西地区。由于绿化力度不断增强以及温室气体的排放得到有效控制,致使主城区平均温度较前几年明显降低。

The paper applied image-based inversion algorithm to the Landsat 7 ETM ＋ satellite data of January 30, 2010 and January 25, 2014 to calculate the LST of Xundian County, Kunming, and finally analyzed the temporal evolution characteristics of the earth surface thermal environment in winter in Xun- dian County. The result showed that from the perspective of space, the earth surface thermal environment in winter in Xundian County had obvious differences, and the distribution of heat island areas scattered from centralized to distributed and far away from the city area; from the perspective of time, the heat is- land effect of the main city of 2014 was weaken than that of 2010, but that of other non-urban parts was relatively strong and relatively concentrated in the west of the study area. Therefore, we can tell in urban construction plan, with the increasing efforts of the local urban living environment greening and the effective control of the greenhouse gas emission ; the average temperature of the main city has obvious decrease than before.