Probabilistic Freeze-Thaw Record for the Northern Hemisphere, 2016-2020

Description

This dataset provides a probabilistic freeze/thaw (FT) data record from 2016 to 2020 for the Northern Hemisphere derived using a deep learning model (U-Net). The model was informed by satellite multi-frequency microwave brightness temperature retrievals from the NASA SMAP (Soil Moisture Active Passive) and JAXA AMSR2 (Advanced Microwave Scanning Radiometer 2) radiometers, and trained using daily soil temperature observations from Northern Hemisphere weather stations and global reanalysis data (ERA-5). Unlike other available FT data records that provide only a binary classification of frozen or non-frozen conditions, this product includes both binary FT and continuous variable estimates of the probability of thawed conditions. This product is designed to complement other established binary FT data records, including the NASA FT Earth System Data Record and SMAP Level 3 FT operational products, by providing a probabilistic FT variable with enhanced accuracy and sensitivity to near-surface (<=5 cm depth) soil FT condition. The data are provided in cloud optimized GeoTIFF (COG) format.

Resources

Name Format Description Link
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DFreeze_Thaw_NorthernHemisphere_2323%26ac%3Dtrue
5 https://daac.ornl.gov%2FABOVE%2Fguides%2FFreeze_Thaw_NorthernHemisphere.html
5 https://doi.org%2F10.3334%2FORNLDAAC%2F2323
5 https://data.ornldaac.earthdata.nasa.gov%2Fprotected%2Fbundle%2FFreeze_Thaw_NorthernHemisphere_2323.zip
5 https://daac.ornl.gov%2FABOVE%2Fguides%2FFreeze_Thaw_NorthernHemisphere_Fig1.jpg
5 https://above.nasa.gov%2F
5 https://data.ornldaac.earthdata.nasa.gov%2Fpublic%2Fabove%2FFreeze_Thaw_NorthernHemisphere%2Fcomp%2FFreeze_Thaw_NorthernHemisphere.pdf
5 https://search.earthdata.nasa.gov/search?q=Freeze_Thaw_NorthernHemisphere_2323&ac=true
21 https://doi.org/10.3334/ORNLDAAC/2323
57 Freeze_Thaw_NorthernHemisphere_2323.zip https://data.ornldaac.earthdata.nasa.gov/protected/bundle/Freeze_Thaw_NorthernHemisphere_2323.zip
22 Freeze_Thaw_NorthernHemisphere_Fig1.jpg https://daac.ornl.gov/ABOVE/guides/Freeze_Thaw_NorthernHemisphere_Fig1.jpg
5 https://above.nasa.gov/
33 Freeze_Thaw_NorthernHemisphere.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/Freeze_Thaw_NorthernHemisphere/comp/Freeze_Thaw_NorthernHemisphere.pdf
5 https://search.earthdata.nasa.gov/search?q=WhitePhenoregions_799&ac=true
21 https://doi.org/10.3334/ORNLDAAC/799
57 WhitePhenoregions_799.zip https://data.ornldaac.earthdata.nasa.gov/protected/bundle/WhitePhenoregions_799.zip
34 799_1_fit.png https://daac.ornl.gov/graphics/browse/sdat-tds/799_1_fit.png
22 White_90_cluster_rankings.jpg https://data.ornldaac.earthdata.nasa.gov/public/global_vegetation/WhitePhenoregions/comp/White_90_cluster_rankings.jpg
22 White_500_elemental_phenoregions.jpg https://data.ornldaac.earthdata.nasa.gov/public/global_vegetation/WhitePhenoregions/comp/White_500_elemental_phenoregions.jpg
22 White_140_screened_phenoregions.jpg https://data.ornldaac.earthdata.nasa.gov/public/global_vegetation/WhitePhenoregions/comp/White_140_screened_phenoregions.jpg
33 white_phenoregions.pdf https://data.ornldaac.earthdata.nasa.gov/public/global_vegetation/WhitePhenoregions/comp/white_phenoregions.pdf
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2784383305-ORNL_CLOUD.iso19115

Tags

  • earth-science-frozen-ground-cryosphere-seasonally-frozen-ground
  • earth-science-frozen-ground-land-surface-seasonally-frozen-ground

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