ABoVE: Passive Microwave-derived Annual Snowoff Date Maps, 1988-2018

This dataset provides annual maps of the snowoff (SO) date from 1988-2018 across Alaska and parts of Far East Russia and northwest Canada at a resolution of 6.25 km. SO date is defined as the last day of persistent snow and was derived from the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave (PMW) EASE-Grid Brightness Temperature (Tb) Earth System Data Record (ESDR) product. The spatial domain was intended to match MODIS Alaska Snow Metrics and extend its temporal fidelity beyond the MODIS era. SO date estimates were compared to snow depth measurements collected at SNOTEL stations across Alaska and to three SO datasets derived from MODIS, Landsat, and the Interactive Multisensor Snow and Ice Mapping System (IMS). The data from 1988-2016 included a coastal mask removing coastal pixels due to potential water contamination from coarse brightness temperature observations (Dersken et al., 2012). There is not a coastal mask for the 2017-2018 data. The full data are included, and data users should be aware that coastal values can be adversely affected by adjacent water bodies.

Data and Resources

Additional Info

Field Value
Maintainer undefined
Last Updated July 17, 2025, 17:42 (UTC)
Created April 23, 2025, 23:04 (UTC)
accessLevel public
bureauCode {026:00}
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catalog_@id https://data.nasa.gov/data.json
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Pan, C.G., P.B. Kirchner, J. Du, and J.S. Kimball. 2021. ABoVE: Passive Microwave-derived Annual Snowoff Date Maps, 1988-2018. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1711
graphic-preview-description Summary statistics for the snowoff date from 1988-2016 across the study domain: mean (left), standard deviation (middle), and coefficient of variation (right). Dates expressed as day of year (DOY).
graphic-preview-file https://daac.ornl.gov/ABOVE/guides/Passive_Microwave_Snowoff_Data_Fig1.png
harvest_object_id 71613162-c95a-48e0-9f7c-d3cc4f38e526
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C2221862177-ORNL_CLOUD
issued 2022-02-21
landingPage https://doi.org/10.3334/ORNLDAAC/1711
language {en-US}
metadata_type geospatial
modified 2023-06-12
programCode {026:001}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 34cd7d73601ccf0dfe3304cdbfe8a54525f22b62c0e1236384b5f61003874d52
source_schema_version 1.1
spatial -180.0 37.98 180.0 90.0
temporal 1988-01-01T00:00:00Z/2018-12-31T23:59:59Z
theme {ABoVE,geospatial}