Global-Gridded Daily Methane Emissions from Lake Systems, 2003-2015

Johnson, Matthew S.; Matthews, E; Bastviken, D; Du, J; Genovese, V

This dataset provides global gridded information on lake surface area and open water CH4 emissions at a resolution of 0.25-degree x 0.25-degree for an annual climatology representative of the average conditions from 2003 to 2015. A compilation of flux data from 575 individual lake systems and 893 aggregated flux values were used, and each flux measurement was classified into one of seven ecoclimatic types. Ice-cover-regulated emission seasonality was derived from satellite microwave observations of ice cover phenology and freeze-thaw dynamics. Global lake area was determined from the merger of HydroLAKES and Climate Change Initiative Inland-Water (CCI-IW) remote-sensing data, and lakes were classified into ecoclimatic regions to facilitate linking these types with ecosystem-specific CH4 measurements in the flux compilation. Exploratory estimates of fluxes associated with ice melt and with spring and fall water-column turnover are also included. The data are provided in NetCDF format.

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ORNL DAAC

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Additional Info

Field Value
Identifier DOI: 10.3334/ORNLDAAC/2008
Project(s)
Institute NASA Ames Research Center
Source https://doi.org/10.3334/ORNLDAAC/2008
Publication Date 2023-01-25
Version 1.0
Product global gridded information on lake surface area and open water CH4 emissions for an annual climatology representative of the average conditions from 2003 to 2015
Sensor Global lake area and spatial distribution for this study was extracted from HydroLAKES. Spatiotemporal rates of methane emissions were derived from flux measurements at 575 lake sites. More information can be found in the corresponding publication.
Files
  1. Global lake surface area
  2. Global daily lake diffusion/ebullition emissions
  3. Global daily lake fall water column turnover emissions
  4. Global daily lake ice-out emissions
Variables [Units]
  1. crs: coordinate reference system
  2. lat: latitude coordinate [°N]
  3. lon: longitude coordinate [°E]
  4. LakeArea_Glacial: glacial/postglacial lake area [m2]
  5. LakeArea_Organic: organic lake area [m2]
  6. LakeArea_OtherBoreal: other boreal lake area [m2]
  7. LakeArea_PeatPond: peat pond area [m2]
  8. LakeArea_Temperate: temperate lake area [m2]
  9. LakeArea_Thermokarst: thermokarst lake area [m2]
  10. LakeArea_Total: all/total lake area [m2]
  11. LakeArea_Tropical: tropical/subtropical lake area [m2]
  12. LakeFraction_Total: fraction of each cell that contains all/total lake area
  13. time: climatological day of year
  14. climatology_bounds: start and end points of each time step
  15. DiffusionEbullition_Glacial: diffusion and ebullition methane emission rate from glacial/postglacial lakes [g m-2 day-1]
  16. DiffusionEbullition_Organic: diffusion and ebullition methane emission rate from organic lakes [g m-2 day-1]
  17. DiffusionEbullition_OtherBoreal: diffusion and ebullition methane emission rate from other boreal lakes [g m-2 day-1]
  18. DiffusionEbullition_PeatPond: diffusion and ebullition methane emission rate from peat ponds [g m-2 day-1]
  19. DiffusionEbullition_Temperate: diffusion and ebullition methane emission rate from temperate lakes [g m-2 day-1]
  20. DiffusionEbullition_Thermokarst: diffusion and ebullition methane emission rate from Thermokarst lakes [g m-2 day-1]
  21. DiffusionEbullition_TotalLakes: diffusion and ebullition methane emission rate from total/all lakes [g m-2 day-1]
  22. DiffusionEbullition_Tropical: diffusion and ebullition methane emission rate from tropical/subtropical lakes [g m-2 day-1]
  23. EmissionSeason: length of the methane emission season (thaw season) for total/all lakes
  24. FallTurnover_TotalLakes: fall water column turnover methane emission rate from total/all lakes [g m-2 day-1]
  25. IceOut_TotalLakes: ice out and spring water column turnover methane emission rate from total/all lakes [g m-2 day-1]
Region Global
Spatial Reference EPSG:4326 WGS 84
Spatial Resolution 0.25°
Spatial Coverage Latitude -90.0 to 90.0, Longitude -180.0 to 180.0
Temporal Coverage Climatological
Temporal Resolution Daily
Format NetCDF
Is Supplement To

Johnson, M. S., Matthews, E., Du, J., Genovese, V., & Bastviken, D. (2022). Methane emission from global lakes: New spatiotemporal data and observation-driven modeling of methane dynamics indicates lower emissions. Journal of Geophysical Research: Biogeosciences, 127, e2022JG006793. https://doi.org/10.1029/2022JG006793
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