geeSEBAL-MODIS 南美洲大陆尺度蒸散发产品
geeSEBAL-MODIS 0-02 版蒸散（ET）产品是以 500 米像素分辨率制作的 8 天产品。蒸散发计算算法基于 SEBAL 模型和粮农组织彭曼-蒙蒂斯方程，其中包括每日气象再分析数据输入以及 MODIS 遥感数据产品，如植被特性动态、反照率、土地覆被和地表温度（LST）。前言 – 人工智能教程
图层的像素值是该时段内所有 8 天的平均值乘以 1000。图像的实际值必须乘以 0.001。请注意，每年的最后 8 天是一个 5 天或 6 天的综合时段，具体取决于年份。数据集有效期为 2002-07-01 至 2022-12-31。波段信息如下
| Name | Description | Min | Max | Units | Scale | Offset |
| ET_24h | Daily actual evapotranspiration | 0 | 6601 | mm day-1 | 0.001 | 0 |
| FE | Evaporative fraction | 0 | 1017 | [-] | 0.001 | 0 |
| ETr | Reference evapotranspiration | -220 | 7543 | mm day-1 | 0.001 | 0 |
| Rn24h_G | Daily average net radiation | -84478 | 198081 | w m-2 | 0.001 | 0 |
| LE | Instantaneous latent heat flux | 0 | 2478572 | w m-2 | 0.001 | 0 |
| H | Instantaneous sensible heat flux | -829456 | 964618 | w m-2 | 0.001 | 0 |
| Rn | Instantaneous net radiation | -5435 | 753836 | w m-2 | 0.001 | 0 |
| G | Instantaneous soil heat flux | -2039206 | 102284 | w m-2 | 0.001 | 0 |
| End_Members | Cold and hot endmember candidates. Pixels with -1.0 values are cold candidates and pixels equal to 1.0 are hot endmember candidates. | -121 | 172 | [-] | 0.001 | 0 |
| LST_lat | Land surface temperature, corrected by the adiabatic lapse rate and normalized by the solar zenith angle. | 272879 | 330413 | K | 0.001 | 0 |
| LST_dem | Land surface temperature, corrected by the adiabatic lapse rate | 254456 | 331505 | K | 0.001 | 0 |
引用信息：
Comini, Bruno & Ruhoff, Anderson & Laipelt, Leonardo & Fleischmann, Ayan & Huntington, Justin & Morton, Charles & Melton, Forrest & Erickson, Tyler & Roberti, Débora & Souza, Vanessa & Biudes, Marcelo & Machado, Nadja & Santos, Carlos & Cosio, Eric. (2023). geeSEBAL-MODIS: Continental scale evapotranspiration based on the surface energy balance for South America. 10.13140/RG.2.2.17579.11041.
代码
var dataset = ee.ImageCollection('projects/et-brasil/assets/geesebal/myd11a2/sa/v0-02') .filter(ee.Filter.date('2018-05-01', '2018-10-01')); var et = dataset.select('ET_24h'); var etVis = { min: 0.0, max: 6000.0, palette: ['#650000','#b02323','#d35454','#cc9e99','#e6e2ac','#99accc','#5676d6','#2222ab','#380061'] }; Map.setCenter(-50, -25, 3); Map.addLayer( et, etVis, 'Daily Evapotranspiration (mm/day)');
License¶
The datset is made available under a CC-BY-4.0 license.
Curated by: Bruno Comini de Andrade, Anderson Ruhoff, Leonardo Laipelt
Keywords: evapotranspiration, South America, water resources
Last updated: 2023-03-26 https://code.earthengine.google.com/ba815cfffab1b2f60ef92446693b9170
