ATom: Column-Integrated Densities of Hydroxyl and Formaldehyde in Remote Troposphere

Published by ORNL_DAAC | National Aeronautics and Space Administration | Metadata Last Checked: September 14, 2025 | Last Modified: 2025-09-10

This dataset provides profile-integrated column densities of formaldehyde (HCHO), hydroxyl (OH), and OH production rates, diel tropospheric mean OH concentrations, and uncertainties that were derived from direct observation data from selected profiles of NASA Atmospheric Tomography (ATom) mission 1 and 2 flights for the period July 29, 2016 to February 21, 2017. These calculated products were combined with coincident HCHO column retrievals from the Ozone Monitoring Instrument (OMI) to scale and extend the profile results to a global gridded (0.5 deg latitude x 0.625 deg longitude) product. In addition to OMI formaldehyde column data, model output products from the Global Modeling Initiative (GMI) including average tropopause height, scaling factor, column air mass, and column-average formaldehyde photolysis frequency are provided. The GMI model output products were used in calculations and are included for user convenience.

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earth-science-atmospheric-chemistry-atmosphere-carbon-and-hydrocarbon-compounds-formaldehyde earth-science-atmospheric-chemistry-atmosphere-hydrogen-compounds-hydroxyl earth-science-atmospheric-chemistry-atmosphere-trace-gases-trace-species

Complete Metadata

bureauCode	[ "026:00" ]
identifier	10.3334/ORNLDAAC/1669
landingPage	https://search.earthdata.nasa.gov/search?q=ATom_Mapping_OH_Troposphere_1669&ac=true
programCode	[ "026:000" ]
spatial	[[{"WestBoundingCoordinate":-180.0,"NorthBoundingCoordinate":90.0,"EastBoundingCoordinate":179.985,"SouthBoundingCoordinate":-90.0}],"CARTESIAN"]
temporal	2016-07-29/2016-07-29
theme	[ "Earth Science" ]