MERRA-2 M2T1NXRAD: Radiation Diagnostics V5.12.4

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NASA/GSFC/MERRA/rad/2
Dataset Availability
1980-01-01T00:00:00Z–2022-12-31T23:00:00
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("NASA/GSFC/MERRA/rad/2")
Tags
albedo emissivity merra shortwave temperature

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

* estimated min or max value

Terms of Use

Terms of Use

NASA promotes the full and open sharing of all data with research and applications communities, private industry, academia, and the general public.

Explore in Earth Engine

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');