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Atmospheric Photolytic Rates from ATom

Photolysis frequency (J-value).

An image of photolysis frequency (J-value) for J-O1D under cloudy conditions from the GSFC GMI model.

Atmospheric photolytic rates for ozone and nitrogen dioxide were estimated using nine global chemistry-climate or chemistry-transport models.

Merged Data from the Atmospheric Tomography Mission

ATom flights

Generalized overview of ATom flights. During each of the four campaigns, ATom flights originated from California, flew south over the Pacific Ocean, then north to the western Arctic, southwest to New Zealand, east to Chile and the Atlantic Ocean, north to Greenland, and returned to California across North America. During flights, the aircraft continuously profiled the atmosphere from 0.2 to 12 km altitude.

The Atmospheric Tomography Mission (ATom) has released multi-instrument merged data from all four flight campaigns spanning from 2016 - 2018.

ACT-America Atmospheric Data Updated

ACT-America Fall 2017 flight

Photograph of the Midwestern United States taken during a Fall 2017 ACT-America flight. A storm system had recently brought a blanket of snow to the region. (Image credit: NASA/Bing Lin)

Atmospheric gas data from all four seasonal flight campaigns (Summer 2016, Winter 2017, Fall 2017, and Spring 2018) are now available from the ACT-America mission.

Atmospheric Profiles of Hydroxyl and Formaldehyde

Full flight tracks for ATom missions 1

Circles mark the locations of the 139 selected profiles sampling the remote troposphere. Circle color indicates HCHO column densities integrated over each ATom profile. Data are overlain on global gridded OMI HCHO column densities averaged over the mission. From Wolfe et al. (2019) (see dataset references).

New data from NASA's Atmospheric Tomography Mission (ATom) provide hydroxyl and formaldehyde column density in the remote troposphere.

Column-average CO2 Concentrations from ACT-America

ACT-America column-average carbon dioxide concentrations

Column-average CO2 measured during the first 20 minutes of flight off the coast of New Jersey on July 11, 2016, for the ACT-America mission.

A new dataset provides remotely-sensed column-average carbon dioxide concentrations measured over the Eastern US.