Synthesis of Global Actual Evapotranspiration from 1982 to 2019

This product is an ensemble ET estimates from 1982 to 2019 with a 1000 m × 1000 m spatial resolution.
<br/><a href="https://developers.google.com/earth-engine/datasets/catalog/CAS_IGSNRR_PML_V2">PML</a>, <a href="https://edcintl.cr.usgs.gov/downloads/sciweb1/shared//fews/web/global/monthly/eta/downloads/">SSEBop</a>, <a href="https://developers.google.com/earth-engine/datasets/catalog/MODIS_NTSG_MOD16A2_105">MOD16A2105</a>, and <a href="http://files.ntsg.umt.edu/data/ET_global_monthly/Global_8kmResolution/">NTSG </a> were augmented together to create the new dataset. Since SSEBop and MOD16A2105 have a 1000 m × 1000 m spatial resolution, PML was upscaled and NTSG was downscaled by pixel average and nearest neighbor resampling techniques in Google Earth Engine (GEE), respectively. The synthesized ET was fully contributed by SSEBop for the years 2018 and 2019 and by NTSG from 1982 to 2000, while for the years 2001 and 2002, it was contributed by the simple mean of MOD16A2105 and NTSG. Finally, between 2003 and 2017, the value represents the simple mean of PML and SSEBop.
<br/><a href="https://elnashar.users.earthengine.app/view/synthesizedet">Click to open GEE application version</a><br/>
<br/><a href="https://code.earthengine.google.com/7d9bb651b66cfbc4cdb6d968025177e5">Click to open GEE JavaScript version</a><br/>

搜集汇总

背景与挑战

背景概述

该数据集是一个全球实际蒸散发的合成产品，覆盖1982年至2019年，空间分辨率为1000米×1000米。它通过整合PML、SSEBop、MOD16A2105和NTSG等多个现有数据集，并采用空间分辨率调整技术，在不同年份使用特定数据源组合，以提供长期、一致的蒸散发估计。