TOMS and OMI Merged Ozone Data v4

Dataset Availability

1978-11-01T00:00:00Z–2026-05-03T00:00:00Z

Dataset Producer

NASA / GES DISC

Earth Engine Snippet

ee.ImageCollection("TOMS/MERGED_V4")

Cadence

1 Day

Tags

atmosphere

aura

climate

geophysical

ges-disc

goddard

nasa

omi

ozone

toms

Description

The Total Ozone Mapping Spectrometer (TOMS) data represent the primary long-term, continuous record of satellite-based observations available for use in monitoring global and regional trends in total ozone over the past 25 years. The data are produced by the Laboratory for Atmospheres at NASA's Goddard Space Flight Center. Version 8 TOMS data products include level 3 gridded data (1.0 x 1.25 deg). The Ozone Monitoring Instrument (OMI), aboard the Aura satellite (July 2004 - current), has a higher resolution (1.0 x 1.0 deg).

These data represent a merged ozone product from TOMS/EarthProbe, TOMS/Nimbus-7, TOMS/Meteor-3, OMI/Aura and USGS-interpolated data for dates with no data.

See this document for a summary of changes between v3 and v4.

Additional TOMS and OMI information

Bands

Bands

Pixel size: 111000 meters (all bands)

Name	Units	Min	Max	Pixel Size	Description
ozone	Dobson	73*	983*	111000 meters	Total column ozone

* estimated min or max value

Terms of Use

Terms of Use

Distribution of data from the Goddard Earth Sciences Data and Information Services Center (GES DISC) is funded by NASA's Science Mission Directorate (SMD). Consistent with NASA Earth Science Data and Information Policy, data from the GES DISC archive are available free to the user community. For more information visit the GES DISC Data Policy page.

Citations

Citations:

• The data set source should be properly cited when the data are used. A formal reference of the form: <authors>, 2012, last updated 2013: <dataset name>. NASA/GSFC, Greenbelt, MD, USA, NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). Accessed <enter user data access date> at <DOI> is suggested following Parsons et al. (2010), doi:10.1029/2010EO340001

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('TOMS/MERGED_V4')
                  .filter(ee.Filter.date('2018-08-01', '2018-08-10'));
var columnOzone = dataset.select('ozone');
var columnOzoneVis = {
  min: 100,
  max: 500,
  palette: ['1621a2', 'cyan', 'green', 'yellow', 'orange', 'red'],
};
Map.setCenter(6.75, 46.53, 2);
Map.addLayer(columnOzone, columnOzoneVis, 'Column Ozone');

Open in Code Editor

TOMS and OMI Merged Ozone Data v4

The Total Ozone Mapping Spectrometer (TOMS) data represent the primary long-term, continuous record of satellite-based observations available for use in monitoring global and regional trends in total ozone over the past 25 years. The data are produced by the Laboratory for Atmospheres at NASA's Goddard Space Flight Center. Version 8 …

TOMS/MERGED_V4, atmosphere,aura,climate,geophysical,ges-disc,goddard,nasa,omi,ozone,toms

1978-11-01T00:00:00Z/2026-05-03T00:00:00Z

-90 -180 90 180

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