edu.ucar.opensky::articles:23694 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:45:26.229239 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7z60sbw https://doi.org/10.21944/qa4ecv-no2-omi-v1.1 https Related Dataset #1 QA4ECV NO2 tropospheric and stratospheric column data from OMI https://doi.org/10.21944/qa4ecv-no2-gome2a-v1.1 https Related Dataset #2 QA4ECV NO2 tropospheric and stratospheric column data from GOME-2A https://doi.org/10.3334/CDIAC/hippo_010 https Related Dataset #3 HIPPO Merged 10-Second Meteorology, Atmospheric Chemistry, and Aerosol Data. Version 1.0 https://doi.org/10.25966/9qgv-fe81 https Related Dataset #4 Chemical Reanalysis Products https://doi.org/10.3334/ORNLDAAC/1709 https Related Dataset #5 ATom: L2 Measurements from Airborne Tropospheric Hydrogen Oxides Sensor (ATHOS) https://doi.org/10.21944/qa4ecv-no2-scia-v1.1 https Related Dataset #6 QA4ECV NO2 tropospheric and stratospheric column data from SCIAMACHY https://doi.org/10.3334/ORNLDAAC/1293 https Related Dataset #7 Global Fire Emissions Database, Version 4.1 (GFEDv4) https://doi.org/10.5067/AURA/TES/TL2PANN_L2.007 https Related Dataset #8 TES/Aura L2 Peroxyacyl Nitrate Nadir - Version 7 Updated tropospheric chemistry reanalysis and emission estimates, TCR-2, for 2005–2018 2020-09-21T00:00:00Z publication https://n2t.org/ark:/85065/d7z60sbw https://doi.org/10.5194/essd-12-2223-2020 Miyazaki, K. author Bowman, K. author Sekiya, T. author Eskes, H. author Boersma, F. author Worden, Helen M. author Livesey, N. author Payne, V. H. author Sudo, K. author Kanaya, Y. author Takigawa, M. author Ogochi, K. author UCAR/NCAR - Library publisher This study presents the results from the Tropospheric Chemistry Reanalysis version 2 (TCR-2) for the period 2005-2018 at 1.1 degrees horizontal resolution obtained from the assimilation of multiple updated satellite measurements of ozone, CO, NO2, HNO3, and SO2 from the OMI, SCIAMACHY, GOME-2, TES, MLS, and MOPITT satellite instruments. The reanalysis calculation was conducted using a global chemical transport model MIROC-CHASER and an ensemble Kalman filter technique that optimizes both chemical concentrations of various species and emissions of several precursors, which was efficient for the correction of the entire tropospheric profile of various species and its year-to-year variations. Comparisons against independent aircraft, satellite, and ozonesonde observations demonstrate the quality of the reanalysis fields for numerous key species on regional and global scales, as well as for seasonal, yearly, and decadal scales, from the surface to the lower stratosphere. The multi-constituent data assimilation brought the model vertical profiles and interhemispheric gradient of OH closer to observational estimates, which was important in improving the description of the oxidation capacity of the atmosphere and thus vertical profiles of various species. The evaluation results demonstrate the capability of the chemical reanalysis to improve understanding of the processes controlling variations in atmospheric composition, including long-term changes in near-surface air quality and emissions. The estimated emissions can be employed for the elucidation of detailed distributions of the anthropogenic and biomass burning emissions of co-emitted species (NOx, CO, SO2) in all major regions, as well as their seasonal and decadal variabilities. The data sets are available at https://doi.org/10.25966/9qgv-fe81 (Miyazaki et al., 2019a).Copyright statement. (C) California Institute of Technology, 2020. Government sponsorship acknowledged. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation