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Land Surface Temperature Anomalies and Monitoring through Thermal Remote Sensing:A Case of Coal Bed Methane Area at Jiaozuo,Henan Province

NAN Peng,QIN Qiming,YAO Yunjun Institute of Remote Sensing and GIS,School of Earth and Space Sciences,Peking University,Beijing 100871  
Based on the analysis of land surface energy-radiation balance theory,the process of underground heat conduction is analyzed from aspects of rock/soil heat conduction capability and influence over rock thermal conductivity caused by coal-bed methane(CBM).The reasons of land surface temperature(LST) anomalies caused by the heat conduction from the depth of earth are discussed.LST at coal bed methane district is retrieved based on the ASTER data acquired over high CBM density area of Jiaozuo,Henan Province.The retrieved steps is as following: Firstly the atmosphere transmittance is simulated through MODTRAN 4 and land surface emissivity is calculated from NDVI.Then LST of study area is retrieved through split-window algorithm.The result demonstrates that the maximum LST is(302.67?K) and the minimum is(296.62?K).LST anomalies can be easily identified in some area.The causes of LST anomalies area are analyzed and it can be deduced that the main reason of LST anomalies of study area is underground thermal conductivity anomalies caused by high CBM density.The conclusion needs further verification through other methods.
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