GEE数据集

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GEE数据集

2023-11-13 06:50| 来源: 网络整理| 查看: 265

Penman-Monteith-Leuning蒸散V2(PML_V2)产品包括蒸散(ET),其三个组成部分,以及2002-2017年期间500米和8天分辨率的初级产品总产(GPP),空间范围为-60°S至90°N。PML_V2产品的主要优点是:

通过冠层电导对蒸腾作用和GPP的耦合估计(Gan等人,2018;张等, 2019)

将ET划分为三个部分:来自植被的蒸腾作用,来自土壤的直接蒸发以及来自植被的截获降雨的蒸发(Zhang等人,2016)。

PML_V2产品在全球95个通量位点的观测中表现良好,并且与水和生态科学界广泛使用的主要最先进的ET和GPP产品相似或明显更好(Zhang等人,2019)。

Penman-Monteith-Leuning Evapotranspiration V2 (PML_V2) products include evapotranspiration (ET), its three components, and gross primary product (GPP) at 500m and 8-day resolution during 2002-2017 and with spatial range from -60°S to 90°N. The major advantages of the PML_V2 products are:

coupled estimates of transpiration and GPP via canopy conductance (Gan et al., 2018; Zhang et al., 2019)

partitioning ET into three components: transpiration from vegetation, direct evaporation from the soil and vaporization of intercepted rainfall from vegetation (Zhang et al., 2016).

The PML_V2 products perform well against observations at 95 flux sites across globe, and are similar to or noticeably better than major state-of-the-art ET and GPP products widely used by water and ecology science communities (Zhang et al., 2019).

Dataset Availability

2002-07-04T00:00:00Z–2020-12-26T00:00:00

Dataset Provider

PML_V2

Earth Engine Snippet

ee.ImageCollection("CAS/IGSNRR/PML/V2_v017")

Bands

代码

var dataset = ee.ImageCollection('CAS/IGSNRR/PML/V2_v017'); var visualization = { bands: ['GPP'], min: 0.0, max: 9.0, palette: [ 'a50026', 'd73027', 'f46d43', 'fdae61', 'fee08b', 'ffffbf', 'd9ef8b', 'a6d96a', '66bd63', '1a9850', '006837', ] }; Map.setCenter(0.0, 15.0, 2); Map.addLayer( dataset, visualization, 'PML_V2 0.1.7 Gross Primary Product (GPP)');

展示

下载示例代码

 

//研究区 var roi = ee.FeatureCollection("users/sihaixiang/shandong").geometry(); //批量下载函数 function exportImage(image, roi, fileName) { Export.image.toDrive({ image: image, description: "Drive-image-"+fileName, fileNamePrefix: fileName+'_PML', //文件命名 folder: "PML V2", //保存的文件夹 scale: 500, //分辨率 region: roi, //研究区 maxPixels: 1e13, //最大像元素,默认就好 crs: "EPSG:4326" //设置投影 }); } //加载数据集 //PML_V2:耦合蒸散量与初级生产总值,8天/幅,分辨率为500米 var data = ee.ImageCollection("CAS/IGSNRR/PML/V2"); Map.centerObject(roi, 4); //图层显示 //筛选数据 var data_selected = data.filterBounds(roi) .filterDate("2016-7-28", "2016-9-30") .select("ET_water") //'GPP' 'Ec' 'Es' 'Ei' 'ET_water' print("data_selected", data_selected); //生成列表,迭代下载 var indexList = data_selected.reduceColumns(ee.Reducer.toList(), ["system:index"]).get("list"); print("indexList", indexList); indexList.evaluate(function(indexs) { for (var i=0; i


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