- Dataset Availability
- 1980-01-01T00:00:00Z–2024-11-01T23:00:00Z
- Dataset Provider
- NASA/MERRA
- Earth Engine Snippet
-
ee.ImageCollection("NASA/GSFC/MERRA/rad/2")
- Tags
Description
M2T1NXRAD (or tavg1_2d_rad_Nx) is an hourly time-averaged data collection in Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2). This collection consists of radiation diagnostics, such as surface albedo, cloud area fraction, in cloud optical thickness, surface incoming shortwave flux (i.e. solar radiation), surface net downward shortwave flux, and upwelling longwave flux at TOA (top of atmosphere) (i.e. outgoing longwave radiation (OLR) at TOA). The data field is time-stamped with the central time of an hour starting from 00:30 UTC, e.g.: 00:30, 01:30, ... , 23:30 UTC.
MERRA-2 is the latest version of global atmospheric reanalysis for the satellite era produced by NASA Global Modeling and Assimilation Office (GMAO) using the Goddard Earth Observing System Model (GEOS) version 5.12.4. The dataset covers the period of 1980-present with the latency of ~3 weeks after the end of a month.
Bands
Resolution
69375 meters
Y Resolution
55000 meters
Bands
Name | Units | Min | Max | Description |
---|---|---|---|---|
ALBEDO |
0.01* | 0.898471* | Surface albedo |
|
ALBNIRDF |
0.017455* | 0.820016* | Surface albedo for near infrared diffuse |
|
ALBNIRDR |
0.018709* | 0.82001* | Surface albedo for near infrared beam |
|
ALBVISDF |
0.016788* | 0.959771* | Surface albedo for visible diffuse |
|
ALBVISDR |
0.01853* | 0.959762* | Surface albedo for visible beam |
|
CLDHGH |
0* | 0.999236* | Cloud area fraction for high clouds |
|
CLDLOW |
0* | 0.999997* | Cloud area fraction for low clouds |
|
CLDMID |
0* | 0.998779* | Cloud area fraction for middle clouds |
|
CLDTOT |
0* | 1* | Total cloud area fraction |
|
EMIS |
0.943074* | 0.999993* | Surface emissivity |
|
LWGABCLRCLN |
W/m^2 | 41.1408* | 458.523* | Surface absorbed longwave radiation assuming clear sky and no aerosol |
LWGABCLR |
W/m^2 | 41.1414* | 465.929* | Surface absorbed longwave radiation assuming clear sky |
LWGAB |
W/m^2 | 41.1446* | 482.398* | Surface absorbed longwave radiation |
LWGEM |
W/m^2 | 67.5297* | 630.29* | Longwave flux emitted from surface |
LWGNTCLRCLN |
W/m^2 | -248.748* | 61.0736* | Surface net downward longwave flux assuming clear sky and no aerosol |
LWGNTCLR |
W/m^2 | -248.653* | 62.2794* | Surface net downward longwave flux assuming clear sky |
LWGNT |
W/m^2 | -268.862* | 77.255* | Surface net downward longwave flux |
LWTUPCLRCLN |
W/m^2 | 80.6768* | 372.229* | Upwelling longwave flux at TOA assuming clear sky and no aerosol |
LWTUPCLR |
W/m^2 | 80.6768* | 372.229* | Upwelling longwave flux at TOA assuming clear sky |
LWTUP |
W/m^2 | 80.6506* | 370.868* | Upwelling longwave flux at TOA |
SWGDNCLR |
W/m^2 | -0.008217* | 1155.5* | Surface incoming shortwave flux assuming clear sky |
SWGDN |
W/m^2 | 0* | 1127.49* | Surface incoming shortwave flux |
SWGNTCLN |
W/m^2 | 0* | 1088.42* | Surface net downward shortwave flux assuming no aerosol |
SWGNTCLRCLN |
W/m^2 | -3.2e-05* | 1088.42* | Surface net downward shortwave flux assuming clear sky and no aerosol |
SWGNTCLR |
W/m^2 | -0.001333* | 1083.95* | Surface net downward shortwave flux assuming clear sky |
SWGNT |
W/m^2 | 0* | 1083.95* | Surface net downward shortwave flux |
SWTDN |
W/m^2 | 0* | 1404.28* | TOA incoming shortwave flux |
SWTNTCLN |
W/m^2 | 0* | 1315.89* | TOA net downward shortwave flux assuming no aerosol |
SWTNTCLRCLN |
W/m^2 | 0* | 1317.5* | TOA net downward shortwave flux assuming clear sky and no aerosol |
SWTNTCLR |
W/m^2 | 0* | 1316.5* | TOA net downward shortwave flux assuming clear sky |
SWTNT |
W/m^2 | 0* | 1313.33* | TOA net downward shortwave flux |
TAUHGH |
0* | 142.188* | In cloud optical thickness of high clouds(export) |
|
TAULOW |
0* | 318.218* | In cloud optical thickness of low clouds |
|
TAUMID |
0* | 252.995* | In cloud optical thickness of middle clouds |
|
TAUTOT |
0* | 348.125* | In cloud optical thickness of all clouds |
|
TS |
K | 185.73* | 328.864* | Surface skin temperature |
Terms of Use
Terms of Use
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Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('NASA/GSFC/MERRA/rad/2') .filter(ee.Filter.date('2022-02-01', '2022-02-02')).first(); var surface_albedo = dataset.select('ALBEDO'); var saVis = { min: -0.428147, max: 0.833350, palette: ['001137', '01abab', 'e7eb05', '620500'] }; Map.setCenter(-95, 39, 2); Map.addLayer(surface_albedo, saVis, 'Surface albedo');