Reference evapotranspiration (RET) is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface. Each pixel represents the daily reference evapotranspiration in mm.
参考蒸发量（RET）被定义为一个假设的参考作物的蒸发量，它模拟了一个浇灌良好的草地表面的行为。每个像素代表每日参考蒸发量，单位为毫米。
Dataset Availability
2009-01-01T00:00:00 - 2021-08-31T00:00:00
Dataset Provider
FAO UN
Collection Snippet
ee.ImageCollection("FAO/WAPOR/2/L1_RET_E")
Resolution
0.17 degrees
Bands Table
Name | Description | Units | Scale |
|---|---|---|---|
L1_RET_E | Reference Evapotranspiration (Daily) [mm] | mm | 0.1 |
var coll = ee.ImageCollection('FAO/WAPOR/2/L1_RET_E');
var image = coll.first();
Map.setCenter(17.5, 20, 3);
Map.addLayer(image, {min: 0, max: 100});
声明：
The Food and Agriculture Organization of the United Nations (FAO) is mandated to collect, analyze, interpret, and disseminate information related to nutrition, food, and agriculture. In this regard, it publishes a number of databases on topics related to FAO's mandate, and encourages the use of them for scientific and research purposes. Consistent with the principles of openness and sharing envisioned under the Open Data Licensing For Statistical Databases, and consistent with the mandate of FAO, data from the Water Productivity Open Access Portal (WaPOR), as part of AQUASTAT
- FAO's Global Information System on Water and Agriculture, is available free to the user community.
联合国粮食及农业组织（粮农组织）的任务是收集、分析、解释和传播与营养、粮食和农业有关的信息。在这方面，它就与粮农组织任务相关的主题出版了一些数据库，并鼓励人们为科学和研究目的使用这些数据库。根据 "统计数据库开放数据许可 "所设想的开放和共享原则，并与粮农组织的任务相一致，水生产力开放门户（WaPOR）的数据作为AQUASTAT的组成部分
粮农组织的全球水和农业信息系统的一部分，可免费提供给用户群体。
引用：
FAO 2018. WaPOR Database Methodology: Level 1. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO. 72 pages.
FAO 2020. WaPOR V2 Database Methodology. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO. (in press)
