Crop Specific Landsat Derived Reference Evapotranspiration, Evaporative Fraction, and Actual Evapotranspiration for 2016 in the California Central Valley

This dataset contains Landsat-derived images of Evaporative Fraction (ETf), Reference Evapotranspiration (ETo), and Actual Evapotranspiration (ETa) over a portion of California’s Central Valley for 15 dates in 2016. Each of the 15 images used in this study had three corresponding Tif files representing ETf, ETo, and ETa. Data used in this project was sourced from Landsat 8 Surface Reflectance Tier 1 images processed in Google Earth Engine (GEE). These images contain five visible and near-infrared (VNIR) bands and two short-wave infrared (SWIR) bands processed to orthorectified surface reflectance, and two thermal infrared (TIR) bands processed to orthorectified brightness temperature. To determine thermal properties of images to aid in ET calculation, the TIR Band 10 (B10) containing brightness temperature was chosen to determine Land Surface Temperature (LST).

本数据集包含基于陆地卫星（Landsat）衍生的影像，涵盖2016年加利福尼亚中央谷部分区域15个成像日期的蒸发分数（Evaporative Fraction, ETf）、参考蒸散量（Reference Evapotranspiration, ETo）与实际蒸散量（Actual Evapotranspiration, ETa）数据。本研究使用的15景影像各对应3个TIF格式文件，分别对应ETf、ETo与ETa。本项目所用数据源自经谷歌地球引擎（Google Earth Engine, GEE）处理的陆地卫星8号表面反射率一级产品（Landsat 8 Surface Reflectance Tier 1）影像。此类影像包含5个可见光近红外（Visible and Near-Infrared, VNIR）波段与2个短波红外（Short-Wave Infrared, SWIR）波段，均已处理为正射校正表面反射率数据；同时包含2个热红外（Thermal Infrared, TIR）波段，已处理为正射校正亮温数据。为获取辅助蒸散量计算所需的影像热特性，本研究选取搭载亮温信息的热红外10波段（B10）反演得到地表温度（Land Surface Temperature, LST）。