ABoVE: Bias-Corrected IMERG Monthly Precipitation for Alaska and Canada, 2000-2020

Description

This dataset is a modification to the Integrated Multi-satellitE Retrievals for GPM (IMERG) Final Run microwave-only, daily precipitation Version 06 data. It provides bias-corrected IMERG monthly precipitation data for Alaska and Canada from June 2000 through December 2020 in Cloud-Optimized GeoTIFF (*.tif) format. Data are provided in the units of mm/day. NASA's IMERG data product is one of the most advanced satellite precipitation products with a 0.1-degree spatial resolution and near global coverage. This dataset bias-corrected IMERG's HQprecipitation precipitation estimates, which are based on passive microwave (PMW)-only retrievals, using a linear regression method. This method utilizes empirical measurements from rain gauge stations from the Global Historical Climatology Network (GHCN) and a digital elevation model. This bias correction approach improves estimates at elevations above 500 m a.s.l., which are typically underestimated.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2097
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/IMERG_Precip_Canada_Alaska/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/IMERG_Precip_Canada_Alaska.html
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2097
21 ABoVE project site https://above.nasa.gov
33 ABoVE: Bias-Corrected IMERG Monthly Precipitation for Alaska and Canada, 2000-2020: IMERG_Precip_Canada_Alaska.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/IMERG_Precip_Canada_Alaska/comp/IMERG_Precip_Canada_Alaska.pdf
34 Two examples of uncorrected and corrected months Canada-Alaska domain. The correction is applied to pixels > 500 m, so the correction is seen primarily in mountainous areas. Figure from Lober et al. (in review). https://daac.ornl.gov/ABOVE/guides/IMERG_Precip_Canada_Alaska_Fig1.png

Tags

  • precipitation
  • atmosphere
  • earth-science

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