| AuthorAffiliation: | ECCC, NASA/GSFC, BIRA-IASB, and MTU |
| AuthorName: | V.E. Fioletov, C.A. McLinden, D. Griffin, I. Abboud, N. Krotkov, P.J.T. Leonard, C. Li, J. Joiner, N. Theys, and S. Carn |
| comment: | This release of the MSAQSO2L4 product is based on the Version 2 SO2 Emissions Catalogue by V. Fioletov, et al. |
| Conventions: | CF-1.8 |
| DataSetQuality: | The overall uncertainty is about 50%. |
| DayNightFlag: | Day |
| EasternmostLongitude: | 180.0000000 |
| EndUTC: | 2023-12-31T23:59:59.999999Z |
| featureType: | timeSeries |
| Format: | netCDF-4 |
| GranuleID: | MSAQSO2L4_2005-2023_v02-00_20240420.nc |
| history: | 2024-04-20 04:00:00: original file produced in OMI TLCF |
| IdentifierProductDOI: | 10.5067/MEASURES/SO2/DATA406 |
| IdentifierProductDOIAuthority: | https://doi.org/ |
| institution: | ECCC, NASA/GSFC, BIRA-IASB, and MTU |
| InstrumentShortName: | OMI, OMPS, TROPOMI, OMPS |
| LocalGranuleID: | MSAQSO2L4_2005-2023_v02-00_20240420.nc |
| LocalityValue: | Global |
| LongName: | Multi-Satellite Air Quality Sulfur Dioxide (SO2) Database Long-Term L4 Global V2 |
| NorthernmostLatitude: | 90.00000000 |
| ParameterName: | Estimated Annual Emissions Sulfur Dioxide |
| PGEName: | MSAQSO2L4 |
| PGEVersion: | 2.0.2 |
| PlatformShortName: | Aura, Suomi-NPP, S5P, NOAA-20 |
| ProcessingCenter: | OMI TLCF |
| ProcessingLevel: | 4 |
| ProductionDateTime: | 2024-04-20T04:00:00.000000Z |
| RangeBeginningDate: | 2005-01-01 |
| RangeBeginningTime: | 00:00:00 |
| RangeEndingDate: | 2023-12-31 |
| RangeEndingTime: | 23:59:59 |
| references: | https://doi.org/10.5067/MEASURES/SO2/DATA406 |
| SensorShortName: | CCD Ultra Violet, Nadir Mapper, Imaging Spectrometer (Band 3), Nadir Mapper |
| ShortName: | MSAQSO2L4 |
| source: | OMI Aura, OMPS Suomi-NPP, TROPOMI S5P, OMPS NOAA-20 |
| SouthernmostLatitude: | -90.00000000 |
| StartUTC: | 2005-01-01T00:00:00.000000Z |
| title: | Multi-Satellite Air Quality Sulfur Dioxide (SO2) Database Long-Term L4 Global V2 |
| VersionID: | 2 |
| WesternmostLongitude: | -180.0000000 |
| NearestSourceName: | Array of Strings [SourceIndex = 0..758] description: The name of the nearest SO2 source. long_name: Nearest Source Name origname: NearestSourceName fullnamepath: /NearestSourceName |
| Time: | Array of 32 bit Reals [Year = 0..18] _FillValue: -999.9000244 axis: T calendar: gregorian description: The dimension representing the time of observation in years since 0000-01-01 00:00:00. long_name: Time units: years since 0000-01-01 00:00:00 valid_max: 2023.500000 valid_min: 2005.500000 origname: Time fullnamepath: /Time |
| AMF: | Array of 32 bit Reals [SourceIndex = 0..758] _FillValue: -999.9000244 description: The air mass factor used for the source to adjust the emissions based on the site elevation, albedo, etc., for snow-free conditions. long_name: Air Mass Factor units: 1 valid_max: 5.000000000 valid_min: 0.000000000 origname: AMF fullnamepath: /AMF |
| Catalogue_Emissions: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The emissions in ktons of SO2 per year from the source. long_name: Emissions (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: Emissions fullnamepath: /Catalogue/Emissions coordinates: Catalogue_Time Catalogue_Latitude Catalogue_Longitude Catalogue_Elevation |
| Catalogue_EmissionsSNR: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The signal to noise ratio of the SO2 emissions from the source. long_name: SO2 Emissions Signal to Noise Ratio units: 1 valid_max: 100.0000000 valid_min: 0.000000000 origname: EmissionsSNR fullnamepath: /Catalogue/EmissionsSNR coordinates: Catalogue_Time Catalogue_Latitude Catalogue_Longitude Catalogue_Elevation |
| Catalogue_EmissionsUnc: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: One standard deviation for the emissions in ktons of SO2 per year from the source. long_name: Emissions Uncertainty (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: EmissionsUnc fullnamepath: /Catalogue/EmissionsUnc coordinates: Catalogue_Time Catalogue_Latitude Catalogue_Longitude Catalogue_Elevation |
| Catalogue_NumberOfPixels: | Array of 32 bit Integers [SourceIndex = 0..758][Year = 0..18] _FillValue: -999 description: The number of pixels used in the SO2 emissions estimates for the source. long_name: Number of Pixels units: 1 valid_max: 10000 valid_min: 0 origname: NumberOfPixels fullnamepath: /Catalogue/NumberOfPixels coordinates: Catalogue_Time Catalogue_Latitude Catalogue_Longitude Catalogue_Elevation |
| SourceType: | Array of Strings [SourceIndex = 0..758] description: The type of source: Smelter, Power Plant, Volcano, and Oil and Gas. long_name: Source Type origname: SourceType fullnamepath: /SourceType |
| NearestSourceIndex: | Array of 32 bit Integers [SourceIndex = 0..758] _FillValue: -999 description: The index of the nearest source. long_name: Nearest Source Index units: 1 valid_max: 1000 valid_min: 1 origname: NearestSourceIndex fullnamepath: /NearestSourceIndex |
| Longitude: | Array of 32 bit Reals [SourceIndex = 0..758] _FillValue: -999.9000244 axis: X description: The terrestrial longitude (in degrees) of the source. long_name: Longitude units: degrees_east valid_max: 180.0000000 valid_min: -180.0000000 origname: Longitude fullnamepath: /Longitude |
| NearestSourceDistance: | Array of 32 bit Integers [SourceIndex = 0..758] _FillValue: -999 description: The distance to the nearest source (km). long_name: Nearest Source Distance units: km valid_max: 5000 valid_min: 1 origname: NearestSourceDistance fullnamepath: /NearestSourceDistance |
| N20_OMPS_Emissions: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The emissions in ktons of SO2 per year from the source. long_name: Emissions (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: Emissions fullnamepath: /N20_OMPS/Emissions coordinates: N20_OMPS_Time N20_OMPS_Latitude N20_OMPS_Longitude N20_OMPS_Elevation |
| N20_OMPS_EmissionsSNR: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The signal to noise ratio of the SO2 emissions from the source. long_name: SO2 Emissions Signal to Noise Ratio units: 1 valid_max: 100.0000000 valid_min: 0.000000000 origname: EmissionsSNR fullnamepath: /N20_OMPS/EmissionsSNR coordinates: N20_OMPS_Time N20_OMPS_Latitude N20_OMPS_Longitude N20_OMPS_Elevation |
| N20_OMPS_EmissionsUnc: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: One standard deviation for the emissions in ktons of SO2 per year from the source. long_name: Emissions Uncertainty (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: EmissionsUnc fullnamepath: /N20_OMPS/EmissionsUnc coordinates: N20_OMPS_Time N20_OMPS_Latitude N20_OMPS_Longitude N20_OMPS_Elevation |
| N20_OMPS_NumberOfPixels: | Array of 32 bit Integers [SourceIndex = 0..758][Year = 0..18] _FillValue: -999 description: The number of pixels used in the SO2 emissions estimates for the source. long_name: Number of Pixels units: 1 valid_max: 10000 valid_min: 0 origname: NumberOfPixels fullnamepath: /N20_OMPS/NumberOfPixels coordinates: N20_OMPS_Time N20_OMPS_Latitude N20_OMPS_Longitude N20_OMPS_Elevation |
| SourceComments: | Array of Strings [SourceIndex = 0..758] description: Comments regarding the SO2 source. long_name: Source Comments origname: SourceComments fullnamepath: /SourceComments |
| Latitude: | Array of 32 bit Reals [SourceIndex = 0..758] _FillValue: -999.9000244 axis: Y description: The terrestrial latitude (in degrees) of the source. long_name: Latitude units: degrees_north valid_max: 90.00000000 valid_min: -90.00000000 origname: Latitude fullnamepath: /Latitude |
| SourceName: | Array of Strings [SourceIndex = 0..758] cf_role: timeseries_id description: The name of the SO2 source. long_name: Source Name origname: SourceName fullnamepath: /SourceName |
| OriginalSourceNumber: | Array of 32 bit Integers [SourceIndex = 0..758] _FillValue: -999 description: The original source number. long_name: Original Source Number units: 1 valid_max: 1000 valid_min: 1 origname: OriginalSourceNumber fullnamepath: /OriginalSourceNumber |
| NPP_OMPS_Emissions: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The emissions in ktons of SO2 per year from the source. long_name: Emissions (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: Emissions fullnamepath: /NPP_OMPS/Emissions coordinates: NPP_OMPS_Time NPP_OMPS_Latitude NPP_OMPS_Longitude NPP_OMPS_Elevation |
| NPP_OMPS_EmissionsSNR: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The signal to noise ratio of the SO2 emissions from the source. long_name: SO2 Emissions Signal to Noise Ratio units: 1 valid_max: 100.0000000 valid_min: 0.000000000 origname: EmissionsSNR fullnamepath: /NPP_OMPS/EmissionsSNR coordinates: NPP_OMPS_Time NPP_OMPS_Latitude NPP_OMPS_Longitude NPP_OMPS_Elevation |
| NPP_OMPS_EmissionsUnc: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: One standard deviation for the emissions in ktons of SO2 per year from the source. long_name: Emissions Uncertainty (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: EmissionsUnc fullnamepath: /NPP_OMPS/EmissionsUnc coordinates: NPP_OMPS_Time NPP_OMPS_Latitude NPP_OMPS_Longitude NPP_OMPS_Elevation |
| NPP_OMPS_NumberOfPixels: | Array of 32 bit Integers [SourceIndex = 0..758][Year = 0..18] _FillValue: -999 description: The number of pixels used in the SO2 emissions estimates for the source. long_name: Number of Pixels units: 1 valid_max: 10000 valid_min: 0 origname: NumberOfPixels fullnamepath: /NPP_OMPS/NumberOfPixels coordinates: NPP_OMPS_Time NPP_OMPS_Latitude NPP_OMPS_Longitude NPP_OMPS_Elevation |
| Aura_OMI_Emissions: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The emissions in ktons of SO2 per year from the source. long_name: Emissions (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: Emissions fullnamepath: /Aura_OMI/Emissions coordinates: Aura_OMI_Time Aura_OMI_Latitude Aura_OMI_Longitude Aura_OMI_Elevation |
| Aura_OMI_EmissionsSNR: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The signal to noise ratio of the SO2 emissions from the source. long_name: SO2 Emissions Signal to Noise Ratio units: 1 valid_max: 100.0000000 valid_min: 0.000000000 origname: EmissionsSNR fullnamepath: /Aura_OMI/EmissionsSNR coordinates: Aura_OMI_Time Aura_OMI_Latitude Aura_OMI_Longitude Aura_OMI_Elevation |
| Aura_OMI_EmissionsUnc: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: One standard deviation for the emissions in ktons of SO2 per year from the source. long_name: Emissions Uncertainty (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: EmissionsUnc fullnamepath: /Aura_OMI/EmissionsUnc coordinates: Aura_OMI_Time Aura_OMI_Latitude Aura_OMI_Longitude Aura_OMI_Elevation |
| Aura_OMI_NumberOfPixels: | Array of 32 bit Integers [SourceIndex = 0..758][Year = 0..18] _FillValue: -999 description: The number of pixels used in the SO2 emissions estimates for the source. long_name: Number of Pixels units: 1 valid_max: 10000 valid_min: 0 origname: NumberOfPixels fullnamepath: /Aura_OMI/NumberOfPixels coordinates: Aura_OMI_Time Aura_OMI_Latitude Aura_OMI_Longitude Aura_OMI_Elevation |
| Elevation: | Array of 32 bit Integers [SourceIndex = 0..758] _FillValue: -999 axis: Z description: The elevation (in m) of the source. long_name: Elevation positive: up units: m valid_max: 9000 valid_min: -500 origname: Elevation fullnamepath: /Elevation |
| S5P_TROPOMI_Emissions: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The emissions in ktons of SO2 per year from the source. long_name: Emissions (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: Emissions fullnamepath: /S5P_TROPOMI/Emissions coordinates: S5P_TROPOMI_Time S5P_TROPOMI_Latitude S5P_TROPOMI_Longitude S5P_TROPOMI_Elevation |
| S5P_TROPOMI_EmissionsSNR: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: The signal to noise ratio of the SO2 emissions from the source. long_name: SO2 Emissions Signal to Noise Ratio units: 1 valid_max: 100.0000000 valid_min: 0.000000000 origname: EmissionsSNR fullnamepath: /S5P_TROPOMI/EmissionsSNR coordinates: S5P_TROPOMI_Time S5P_TROPOMI_Latitude S5P_TROPOMI_Longitude S5P_TROPOMI_Elevation |
| S5P_TROPOMI_EmissionsUnc: | Array of 32 bit Reals [SourceIndex = 0..758][Year = 0..18] _FillValue: -999.9000244 description: One standard deviation for the emissions in ktons of SO2 per year from the source. long_name: Emissions Uncertainty (ktons of SO2 per year) units: ktons per year valid_max: 10000.00000 valid_min: 0.000000000 origname: EmissionsUnc fullnamepath: /S5P_TROPOMI/EmissionsUnc coordinates: S5P_TROPOMI_Time S5P_TROPOMI_Latitude S5P_TROPOMI_Longitude S5P_TROPOMI_Elevation |
| S5P_TROPOMI_NumberOfPixels: | Array of 32 bit Integers [SourceIndex = 0..758][Year = 0..18] _FillValue: -999 description: The number of pixels used in the SO2 emissions estimates for the source. long_name: Number of Pixels units: 1 valid_max: 10000 valid_min: 0 origname: NumberOfPixels fullnamepath: /S5P_TROPOMI/NumberOfPixels coordinates: S5P_TROPOMI_Time S5P_TROPOMI_Latitude S5P_TROPOMI_Longitude S5P_TROPOMI_Elevation |
| SourceCountry: | Array of Strings [SourceIndex = 0..758] description: The country of the SO2 source. long_name: Source Country origname: SourceCountry fullnamepath: /SourceCountry |
| SourceIndex: | Array of 32 bit Integers [SourceIndex = 0..758] description: The dimension representing the source index. long_name: Source Index units: 1 origname: SourceIndex fullnamepath: /SourceIndex |
| Year: | Array of 32 bit Integers [Year = 0..18] description: The dimension representing the year of observation. long_name: Year of Observation units: 1 origname: Year fullnamepath: /Year |