Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements
<p>Vertical ozone profiles from combined spectral measurements in the ultraviolet and infrared spectral range were retrieved by using data from the TROPOspheric Monitoring Instrument on the Sentinel-5 Precursor (TROPOMI/S5P) and the Cross-track Infrared Sounder on the Suomi National Polar-or...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-05-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/15/2955/2022/amt-15-2955-2022.pdf |
| _version_ | 1817988608429129728 |
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| author | N. Mettig M. Weber A. Rozanov J. P. Burrows P. Veefkind A. M. Thompson A. M. Thompson R. M. Stauffer T. Leblanc G. Ancellet M. J. Newchurch S. Kuang R. Kivi M. B. Tully R. Van Malderen A. Piters B. Kois R. Stübi P. Skrivankova |
| author_facet | N. Mettig M. Weber A. Rozanov J. P. Burrows P. Veefkind A. M. Thompson A. M. Thompson R. M. Stauffer T. Leblanc G. Ancellet M. J. Newchurch S. Kuang R. Kivi M. B. Tully R. Van Malderen A. Piters B. Kois R. Stübi P. Skrivankova |
| author_sort | N. Mettig |
| collection | DOAJ |
| description | <p>Vertical ozone profiles from combined spectral measurements in the ultraviolet and infrared spectral range were retrieved by using data from the TROPOspheric Monitoring Instrument on the Sentinel-5 Precursor (TROPOMI/S5P) and the Cross-track Infrared Sounder on the Suomi National Polar-orbiting Partnership (CrIS/Suomi-NPP), which are flying in loose formation 3 min apart in the same orbit. A previous study of ozone profiles retrieved exclusively from TROPOMI UV spectra showed that the vertical resolution in the troposphere is clearly limited <span class="cit" id="xref_paren.1">(<a href="#bib1.bibx42">Mettig et al.</a>, <a href="#bib1.bibx42">2021</a>)</span>. The vertical resolution and the vertical extent of the ozone profiles is improved by combining both wavelength ranges compared to retrievals limited to UV or IR spectral data only. The combined retrieval particularly improves the accuracy of the retrieved tropospheric ozone and to a lesser degree stratospheric ozone up to 30 km. An increase in the degrees of freedom (DOF) by 1 DOF was found in the UV <span class="inline-formula">+</span> IR retrieval compared to the UV-only retrieval.
Compared to previous publications, which investigated combinations of UV and IR observations from the Ozone Monitoring Instrument and Tropospheric Emission Spectrometer (OMI and TES) and Global Ozone Monitoring Experiment version 2 and Infrared Atmospheric Sounding Interferometer (GOME-2 and IASI) pairs, the degree of freedom is lower, which is attributed to the reduced spectral resolution of CrIS compared to TES or IASI.
Tropospheric lidar and ozonesondes were used to validate the ozone profiles and tropospheric ozone content (TOC). In their comparison with tropospheric lidars, both ozone profiles and TOCs show smaller biases for the retrieved data from the combined UV <span class="inline-formula">+</span> IR observation than from the UV observations alone. For the ozone profiles below 10 km, the mean differences are around <span class="inline-formula">±10</span> % and the mean TOC varies around <span class="inline-formula">±3</span> DU.
We show that TOCs from the combined retrieval agree better with ozonesonde results at northern latitudes than the UV-only and IR-only retrievals and also have lower scatter. In the tropics, the IR-only retrieval shows the best agrement with TOCs derived from ozonesondes.
While in general the TOCs show good agreement with ozonesonde data, the profiles have a positive bias of around 30 % between 10 and 15 km.
The reason is probably a positive stratospheric bias from the IR retrieval.
The comparison of the UV <span class="inline-formula">+</span> IR and UV ozone profiles up to 30 km with the Microwave Limb Sounder (MLS) demonstrates the improvement of the UV <span class="inline-formula">+</span> IR profile in the stratosphere above 18 km. In comparison to the UV-only approach the retrieval shows improvements of up to 10 % depending on latitude but can also show worse results in some regions and latitudes.</p> |
| first_indexed | 2024-04-14T00:36:01Z |
| format | Article |
| id | doaj.art-b5bd58621f4f47a7b3817a5d3906386a |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-04-14T00:36:01Z |
| publishDate | 2022-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-b5bd58621f4f47a7b3817a5d3906386a2022-12-22T02:22:21ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482022-05-01152955297810.5194/amt-15-2955-2022Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurementsN. Mettig0M. Weber1A. Rozanov2J. P. Burrows3P. Veefkind4A. M. Thompson5A. M. Thompson6R. M. Stauffer7T. Leblanc8G. Ancellet9M. J. Newchurch10S. Kuang11R. Kivi12M. B. Tully13R. Van Malderen14A. Piters15B. Kois16R. Stübi17P. Skrivankova18Institute of Environmental Physics, University of Bremen, Bremen, GermanyInstitute of Environmental Physics, University of Bremen, Bremen, GermanyInstitute of Environmental Physics, University of Bremen, Bremen, GermanyInstitute of Environmental Physics, University of Bremen, Bremen, GermanyRoyal Netherlands Meteorological Institute (KNMI), De Bilt, the NetherlandsNASA/Goddard Space Flight Center, Greenbelt, MD, USAUniversity of Maryland-Baltimore County/Joint Center for Earth Systems Technology, Baltimore, MD, USANASA/Goddard Space Flight Center, Greenbelt, MD, USAJet Propulsion Laboratory, California Institute of Technology, Wrightwood, CA, USALATMOS, Sorbonne Université, Paris, FranceAtmospheric and Earth Science Department and Earth System Science Center, University of Alabama in Huntsville, Huntsville, AL, USAEarth System Science Center, University of Alabama in Huntsville, Huntsville, AL, USAFinnish Meteorological Institute, Space and Earth Observation Centre, Sodankylä, FinlandBureau of Meteorology, Melbourne, AustraliaRoyal Meteorological Institute of Belgium, Uccle, Brussels, BelgiumRoyal Netherlands Meteorological Institute (KNMI), De Bilt, the NetherlandsInstitute of Meteorology and Water Management, Warsaw, PolandFederal Office of Meteorology and Climatology MeteoSwiss, Payerne, SwitzerlandCzech Hydrometeorological Institute, Prague, Czech Republic<p>Vertical ozone profiles from combined spectral measurements in the ultraviolet and infrared spectral range were retrieved by using data from the TROPOspheric Monitoring Instrument on the Sentinel-5 Precursor (TROPOMI/S5P) and the Cross-track Infrared Sounder on the Suomi National Polar-orbiting Partnership (CrIS/Suomi-NPP), which are flying in loose formation 3 min apart in the same orbit. A previous study of ozone profiles retrieved exclusively from TROPOMI UV spectra showed that the vertical resolution in the troposphere is clearly limited <span class="cit" id="xref_paren.1">(<a href="#bib1.bibx42">Mettig et al.</a>, <a href="#bib1.bibx42">2021</a>)</span>. The vertical resolution and the vertical extent of the ozone profiles is improved by combining both wavelength ranges compared to retrievals limited to UV or IR spectral data only. The combined retrieval particularly improves the accuracy of the retrieved tropospheric ozone and to a lesser degree stratospheric ozone up to 30 km. An increase in the degrees of freedom (DOF) by 1 DOF was found in the UV <span class="inline-formula">+</span> IR retrieval compared to the UV-only retrieval. Compared to previous publications, which investigated combinations of UV and IR observations from the Ozone Monitoring Instrument and Tropospheric Emission Spectrometer (OMI and TES) and Global Ozone Monitoring Experiment version 2 and Infrared Atmospheric Sounding Interferometer (GOME-2 and IASI) pairs, the degree of freedom is lower, which is attributed to the reduced spectral resolution of CrIS compared to TES or IASI. Tropospheric lidar and ozonesondes were used to validate the ozone profiles and tropospheric ozone content (TOC). In their comparison with tropospheric lidars, both ozone profiles and TOCs show smaller biases for the retrieved data from the combined UV <span class="inline-formula">+</span> IR observation than from the UV observations alone. For the ozone profiles below 10 km, the mean differences are around <span class="inline-formula">±10</span> % and the mean TOC varies around <span class="inline-formula">±3</span> DU. We show that TOCs from the combined retrieval agree better with ozonesonde results at northern latitudes than the UV-only and IR-only retrievals and also have lower scatter. In the tropics, the IR-only retrieval shows the best agrement with TOCs derived from ozonesondes. While in general the TOCs show good agreement with ozonesonde data, the profiles have a positive bias of around 30 % between 10 and 15 km. The reason is probably a positive stratospheric bias from the IR retrieval. The comparison of the UV <span class="inline-formula">+</span> IR and UV ozone profiles up to 30 km with the Microwave Limb Sounder (MLS) demonstrates the improvement of the UV <span class="inline-formula">+</span> IR profile in the stratosphere above 18 km. In comparison to the UV-only approach the retrieval shows improvements of up to 10 % depending on latitude but can also show worse results in some regions and latitudes.</p>https://amt.copernicus.org/articles/15/2955/2022/amt-15-2955-2022.pdf |
| spellingShingle | N. Mettig M. Weber A. Rozanov J. P. Burrows P. Veefkind A. M. Thompson A. M. Thompson R. M. Stauffer T. Leblanc G. Ancellet M. J. Newchurch S. Kuang R. Kivi M. B. Tully R. Van Malderen A. Piters B. Kois R. Stübi P. Skrivankova Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements Atmospheric Measurement Techniques |
| title | Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements |
| title_full | Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements |
| title_fullStr | Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements |
| title_full_unstemmed | Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements |
| title_short | Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements |
| title_sort | combined uv and ir ozone profile retrieval from tropomi and cris measurements |
| url | https://amt.copernicus.org/articles/15/2955/2022/amt-15-2955-2022.pdf |
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