OpenET Ensemble Monthly Evapotranspiration v2.0

Dataset Availability

2008-01-01T00:00:00Z–2023-12-01T00:00:00Z

Dataset Provider

OpenET, Inc.

Earth Engine Snippet

ee.ImageCollection("OpenET/ENSEMBLE/CONUS/GRIDMET/MONTHLY/v2_0")

Tags

evapotranspiration gridmet-derived landsat-derived monthly openet water

Description

The OpenET dataset includes satellite-based data on the total amount of water that is transferred from the land surface to the atmosphere through the process of evapotranspiration (ET). OpenET provides ET data from multiple satellite-driven models, and also calculates a single "ensemble value" from the model ensemble. The models currently included in the OpenET model ensemble are ALEXI/DisALEXI, eeMETRIC, geeSEBAL, PT-JPL, SIMS, and SSEBop. The OpenET ensemble ET value is calculated as the mean of the ensemble after filtering and removing outliers using the median absolute deviation approach. All models currently use Landsat satellite data to produce ET data at a pixel size of 30 meters by 30 meters (0.22 acres per pixel). The monthly ET dataset provides data on total ET by month as an equivalent depth of water in millimeters.

Additional information

Bands

Resolution
30 meters

Bands

Name	Units	Description
et_ensemble_mad	mm	Ensemble ET value, computed as the mean of the ensemble after filtering outliers using the median absolute deviation (mad)
et_ensemble_mad_min	mm	The minimum value in the ensemble range, after filtering for outliers using the median absolute deviation (mad)
et_ensemble_mad_max	mm	The maximum value in the ensemble range, after filtering for outliers using the median absolute deviation (mad)
et_ensemble_mad_count		The number of models used to compute the ensemble ET value, after filtering for outliers using the median absolute deviation (mad)
et_ensemble_mad_index		Bitmask indicating which models were included in the ensemble ET value, after filtering for outliers using the median absolute deviation (mad)
Bitmask for et_ensemble_mad_index Bit 0: DisALEXI included in ensemble 0: No 1: Yes Bit 1: EEMETRIC included in ensemble 0: No 1: Yes Bit 2: GEESEBAL included in ensemble 0: No 1: Yes Bit 3: PTJPL included in ensemble 0: No 1: Yes Bit 4: SIMS included in ensemble 0: No 1: Yes Bit 5: SSEBop included in ensemble 0: No 1: Yes
et_ensemble_sam	mm	The simple arithmetic mean (sam) of all six models in the OpenETmodel ensemble

Image Properties

Image Properties

Name	Type	Description
build_date	STRING	Date assets were built
core_version	STRING	OpenET core library version
end_date	STRING	End date of month
mgrs_tile	STRING	MGRS grid zone ID
start_date	STRING	Start date of month

Terms of Use

Terms of Use

CC-BY-4.0

Citations

Citations:

• Melton, F., Huntington, J., Grimm, R., Herring, J., Hall, M., Rollison, D., Erickson, T., Allen, R., Anderson, M., Fisher, J., Kilic, A., Senay, G., volk, J., Hain, C., Johnson, L., Ruhoff, A., Blankenau, P., Bromley, M., Carrara, W., Daudert, B., Doherty, C., Dunkerly, C., Friedrichs, M., Guzman, A., Halverson, G., Hansen, J., Harding, J., Kang, Y., Ketchum, D., Minor, B., Morton, C., Revelle, P., Ortega-Salazar, S., Ott, T., Ozdogon, M., Schull, M., Wang, T., Yang, Y., Anderson, R., 2021. OpenET: Filling a Critical Data Gap in Water Management for the Western United States. Journal of the American Water Resources Association, 2021 Nov 2. doi:10.1111/1752-1688.12956

DOIs

• https://doi.org/10.1111/1752-1688.12956

Explore with Earth Engine

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('OpenET/ENSEMBLE/CONUS/GRIDMET/MONTHLY/v2_0')
  .filterDate('2020-01-01', '2021-01-01');

// Compute the annual evapotranspiration (ET) as the sum of the monthly ET
// images for the year.
var et = dataset.select('et_ensemble_mad').sum();

var visualization = {
  min: 0,
  max: 1400,
  palette: [
    '9e6212', 'ac7d1d', 'ba9829', 'c8b434', 'd6cf40', 'bed44b', '9fcb51',
    '80c256', '61b95c', '42b062', '45b677', '49bc8d', '4dc2a2', '51c8b8',
    '55cece', '4db4ba', '459aa7', '3d8094', '356681', '2d4c6e',
  ]
};

Map.setCenter(-100, 38, 5);

Map.addLayer(et, visualization, 'OpenET Ensemble Annual ET');

Open in Code Editor

OpenET Ensemble Monthly Evapotranspiration v2.0

The OpenET dataset includes satellite-based data on the total amount of water that is transferred from the land surface to the atmosphere through the process of evapotranspiration (ET). OpenET provides ET data from multiple satellite-driven models, and also calculates a single "ensemble value" from the model ensemble. The models currently …

OpenET/ENSEMBLE/CONUS/GRIDMET/MONTHLY/v2_0, evapotranspiration,gridmet-derived,landsat-derived,monthly,openet,water

2008-01-01T00:00:00Z/2023-12-01T00:00:00Z

25.0 -126.0 50.0 -66.0

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.1111/1752-1688.12956