Surface Temperature Anomalies Derived from Night Time ASTER Data Corrected for Solar and Topographic Effects, Routt County, Colorado

This map shows areas of anomalous surface temperature in Alamosa and Saguache Counties identified from ASTER thermal data and spatial based insolation model. The temperature is calculated using the Emissivity Normalization Algorithm that separate temperature from emissivity. The incoming solar radiation was calculated using spatial based insolation model developed by Fu and Rich (1999). Then the temperature due to solar radiation was calculated using emissivity derived from ASTER data. The residual temperature, i.e. temperature due to solar radiation subtracted from ASTER temperature was used to identify thermally anomalous areas. Areas that had temperature greater than 2o were considered ASTER modeled "very warm modeled surface temperature" are shown in red on the map. Areas that had temperatures between 1o and 2o were considered ASTER modeled"warm modeled surface temperature" are shown in yellow on the map. This map also includes the locations of shallow temperature survey points, locations of springs or wells with favorable geochemistry, faults, transmission lines, and areas of modeled basement weakness "fairways." Note: 'o' is used in this description to represent lowercase sigma.

本地图展示了从ASTER（Advanced Spaceborne Thermal Emission and Reflection Radiometer）热红外数据与空间化日照模型中识别出的阿拉莫萨县（Alamosa）和萨瓜奇县（Saguache）内的地表温度异常区域。地表温度通过发射率归一化算法（Emissivity Normalization Algorithm）计算得到，该算法可将温度与发射率分离。入射太阳辐射量由Fu与Rich（1999年）开发的空间化日照模型计算得出。随后，利用ASTER数据反演得到的发射率，可计算出由太阳辐射诱导的地表温度。将ASTER反演的地表温度减去太阳辐射诱导的温度所得的残差温度，被用于识别热异常区域。温度高于2σ的区域被判定为ASTER反演的"极高模拟地表温度"区域，在本地图中以红色标识；温度介于1σ至2σ之间的区域被判定为ASTER反演的"高模拟地表温度"区域，在本地图中以黄色标识。本地图同时标注了浅层温度调查测点、地球化学特征有利的泉点或水井位置、断层、输电线路，以及模拟得到的基底薄弱带"fairways"。注：本描述中所用的"o"代表小写希腊字母σ。