Areas of Weakly Anomalous to Anomalous Surface Temperature in Routt County, Colorado, as Identified from ASTER Thermal Data

Note: This "Weakly Anomalous to Anomalous Surface Temperature" dataset differs from the "Anomalous Surface Temperature" dataset for this county (another remotely sensed CIRES product) by showing areas of modeled temperatures between 1o and 2o above the mean, as opposed to the greater than 2o temperatures contained in the "Anomalous Surface Temperature" dataset.

This layer contains areas of anomalous surface temperature in Routt County 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 between 1o and 2o were considered ASTER modeled warm surface exposures (thermal anomalies).

Note: 'o' is used in this description to represent lowercase sigma.

本“弱异常至异常地表温度”数据集与该县“异常地表温度”数据集（另一项由CIRES远程感知产品提供）的区别在于，它展示了介于平均温度以上1至2摄氏度的模拟温度区域，而非“异常地表温度”数据集中所包含的超过2摄氏度的温度。该层包含来自ASTER热数据和基于空间辐射模型的Routt县异常地表温度区域。温度的计算采用发射率归一化算法，该算法将温度与发射率分离。入射太阳辐射的计算基于由Fu和Rich（1999年）开发的基于空间辐射模型。然后，利用从ASTER数据中提取的发射率计算太阳辐射导致的温度。残余温度，即从ASTER温度中减去太阳辐射导致的温度，被用来识别热异常区域。温度介于1至2摄氏度的区域被视为ASTER模拟的暖地表暴露（热异常）。注意：‘o’在本描述中用于表示小写西格玛符号。