TOMS and OMI Merged Ozone Data

Dataset Availability
1978-11-01T00:00:00 - 2021-02-25T00:00:00
Dataset Provider
Earth Engine Snippet
toms ozone omi atmosphere aura geophysical climate nasa ges-disc goddard


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.

Additional TOMS and OMI information



Name Units Min Max Description
ozone Dobson units 73* 983*

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.


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

Explore in Earth Engine

var dataset = ee.ImageCollection('TOMS/MERGED')
                  .filter('2018-08-01', '2018-08-10'));
var columnOzone ='ozone');
var columnOzoneVis = {
  min: 100.0,
  max: 500.0,
  palette: ['1621A2', 'cyan', 'green', 'yellow', 'orange', 'red'],
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(columnOzone, columnOzoneVis, 'Column Ozone');