Multi-Satellite Air Quality Sulfur Dioxide (SO2) Database Long-Term L4 Global V2 (MSAQSO2L4) at GES DISC

Description

These data are a part of Multi-Decadal Sulfur Dioxide (SO2) Climatology from Satellite Instruments (MEaSUREs-12-0022 project). Version 2 of the global catalogue of emissions from large SO2 point sources combines data from the Ozone Monitoring Instrument (OMI) on NASA's EOS Aura spacecraft, the Ozone Mapping and Profiler Suite (OMPS) on the NASA-NOAA Suomi National Polar-orbiting Partnership (SNPP), and the TROPOspheric Monitoring Instrument (TROPOMI) on the ESA/Copernicus Sentinel-5 Precursor (S-5P) spacecraft. The catalogue MSAQSO2L4 file contains the site coordinates, source type, country, source name, annual SO2 emissions, annual emission uncertainties, and the number of satellite pixels in the fitting area for three satellite instruments as well as for their weighted average. The emission estimates are based on operational version 2 OMI and OMPS Principal Component Analysis (PCA) retrieval algorithm SO2 slant column density (SCD) data (Li et al., 2020) as well as on new TROPOMI Covariance-Based Retrieval Algorithm (COBRA) SCD data (Theys et al., 2021). A single time-independent site-specific Air-Mass Factor (AMF) value for each site was calculated (McLinden et al., 2014) and applied consistently to each satellite SCD dataset to derive SO2 vertical column densities (VCDs=SCDs/AMFs). The emission estimate method is based on a fit of satellite VCDs to an empirical plume model developed to describe the SO2 spatial distribution near emission point sources. The plume model assumes that the SO2 concentrations emitted from a point source decline exponentially with distance and that they are affected by turbulent diffusion that can be described by a two-dimensional (2D) exponentially modified Gaussian function. The total SO2 mass is derived from the fit and the annual emission rate is calculated as the ratio between the total mass and the prescribed SO2 lifetime.

Resources

Name Format Description Link
34 MSAQSO2L4.PNG https://docserver.gesdisc.eosdis.nasa.gov/public/project/MEaSUREs/Krotkov/MSAQSO2L4.PNG
21 Use the Earthdata Search Client to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=MSAQSO2L4
33 README.MSAQSO2L4.V2.pdf https://docserver.gesdisc.eosdis.nasa.gov/public/project/MEaSUREs/Krotkov/README.MSAQSO2L4.V2.pdf
21 Global Sulfur Dioxide Monitoring Home Page https://so2.gsfc.nasa.gov/measures.html
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FMEASURES%2FSO2%2FDATA406
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/MSAQSO2L4_2.html
21 Access the data via HTTP. https://measures.gesdisc.eosdis.nasa.gov/data/SO2/MSAQSO2L4.2
21 Access the data via the OPeNDAP protocol. https://measures.gesdisc.eosdis.nasa.gov/opendap/SO2/MSAQSO2L4.2
21 Project summary goals and description https://earthdata.nasa.gov/community/community-data-system-programs/measures-projects/multi-decadal-sulfur-dioxide-climatology-from-satellite-instruments

Tags

  • human-dimensions
  • aerosols
  • atmosphere
  • atmospheric-chemistry
  • natural-hazards
  • air-quality
  • earth-science

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