ORIGINAL RESEARCH article
Front. Remote Sens.
Sec. Atmospheric Remote Sensing
Volume 6 - 2025 | doi: 10.3389/frsen.2025.1634922
This article is part of the Research TopicEarth Observations from the Deep Space: 10 Years of the DSCOVR MissionView all articles
Ten Years of Tropospheric Ozone from DSCOVR EPIC: Science and Applications
Provisionally accepted
Jerald Ziemke1,2*
Natalya Kramarova1
Stacey M Frith1,2Kai-Liang Huang Huang1Kanghyun Baek1Jay R Herman1- 1Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, United States
- 2NASA Goddard Space Flight Center, Greenbelt, United States
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The Earth Polychromatic Imaging Camera (EPIC) onboard the Deep Space Climate ObserVatoRy (DSCOVR) spacecraft has enabled near-global measurements of total ozone, SO2, aerosols, surface reflectivity, surface UV, and cloud pressure from June 2015 to present at high spatiotemporal resolution. The EPIC instrument measures these geophysical parameters synoptically over the entire sunlit disk of the Earth every 1-2 hours each day at a resolution down to ~18 km × 18 km at the nadir sub-satellite point. No current satellite instrument other than EPIC makes measurements every 1-2 hours over the sunlit disk of the Earth while still obtaining near-global coverage each day. We present science results from 10 years of tropospheric column ozone (TCO) derived from combined EPIC and Modern-Era Retrospective analysis for Research and Applications (MERRA-2) ozone. We use the EPIC TCO to characterize variabilities in tropospheric ozone from daily to decadal timescales. We also use EPIC TCO with the hourly sampling to evaluate geostationary measurements of total and tropospheric ozone from the Geostationary Environmental Monitoring Spectrometer (GEMS) instrument. The EPIC TCO hourly data gridded at 1o × 1o horizontal resolution for June 2015-present are made available to the general public from the NASA Langley Atmospheric Science Data Center (ASDC) data portal.
Keywords: Ozone, troposphere,, stratosphere, pollution, epic, DSCOVR
Received: 25 May 2025; Accepted: 10 Jul 2025.
Copyright: © 2025 Ziemke, Kramarova, Frith, Huang, Baek and Herman. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Jerald Ziemke, Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, United States
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