长白山地区主要断裂带与地表温度场关系研究

Relationship between main fault and land surface temperature field of Changbai Mountain area

基于Landsat 5 TM和Landsat 7 ETM+影像,采用辐射传输方程法反演长白山地区地表温度,以已知断裂带为中心线,向两侧相同范围做等间距划分,统计各等分带内的平均地表温度和平均距离,运用图形的形式展现温度场和断裂构造之间的关系,并用等分带平均温度和平均距离绘制相关性曲线来进一步描述温度场与主要断裂构造之间的关系。结果表明:9月份时区域内的6条断裂带与地表温度场相关性显著,区域特征稳定,等分带内距离断裂带越远,地表温度越低;4月份时地表温度场随断裂构造的变化趋势和11月份时地表温度场随断裂构造的变化趋势呈现出很大程度的吻合。区域内的北东向和近东西向断裂带,其地表温度场与断裂构造之间表现出一定的相关性,北西向的北岗断裂带、红旗村—天池断裂带以及漫江断裂带与地表温度场的相关性并不显著,红旗村—天池温度场与漫江温度场可能属于一个更大尺度的温度场的两侧。

Based on Landsat 5 TM and Landsat 7 ETM ＋ images,we use radiation transfer equation to invert land surface temperature in the studied area. Then we make the known fault zone as center line,do equidistant division to both sides of the same extent,calculate average land surface temperature and average distance within each equal zone,use graph to show the relationship between temperature field and faults and use average land surface temperature and average distance of equal zone to draw the correlation curve to further describe the relationship between temperature field and major faults. The results show that in September,six fault zones are significantly associated with land surface temperature field within the region,the regional characteristics are stable,the farther the distance of fault zone and the decile band,the lower the land surface temperatures are. In April and November,the change tendency of land surface temperature field with the fracture structure shows a big match,and it shows some correlation between land surface temperature field and its faults in the zone of northeast and approximately EW fault zone. The correlation between the fault zones in Beigang（ with NW trend）,Hongqicun-Tianchi,Manjiang,the land surface temperature field is not significant. The Hongqicun-Tianchi temperature field and Manjiang tem-perature field may belong to either side of a larger-scale temperature field.