Walrus Monthly Foraging Utilization Distribution in the Chukchi Sea: 2008-2011 [Jay]

This dataset describes Pacific walrus (Odobenus rosmarus divergens) utilization of the Chukchi sea by tracking walruses and their hourly foraging behavior from June through November using satellite-linked tags during years of sparse sea ice (2008-2011). To estimate the density of walrus foraging on a monthly basis, a movement-based kernel density estimator application was used to predict walrus utilization over a 5 km resolution grid encompassing the Chukchi Sea. It generated utilization density contours from the gridded utilization distribution. The utilization density contours are provided for environmental planning purposes and may only be understood within the context of the published manuscript. This dataset is part of the Pacific Marine Arctic Regional Synthesis (PacMARS) Project.

Data is structured by month, which ranges from June through November. Within each month walrus foraging utilization distributions were estimated by weighting the kernel density distribution by the amount of time spent foraging during each recorded track segment. Presented are contour intervals ranging from 10th to 95th percentile in the geographically referenced Portable Network Graphic files and shape files referenced below in the related links.

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Temporal Range

  • Begin:  2008-06-01T00:00:00Z
    End:  2011-11-30T23:59:00Z


Resource Type dataset
Temporal Range Begin 2008-06-01T00:00:00Z
Temporal Range End 2011-11-30T23:59:00Z
Temporal Resolution N/A
Bounding Box North Lat 75.00000
Bounding Box South Lat 65.00000
Bounding Box West Long 172.00000
Bounding Box East Long -156.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links

Documentation #1 : walrus_jay_readme.txt

Additional Information N/A
Resource Format N/A
Standardized Resource Format N/A
Asset Size 1 MB
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Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email eol-datahelp@ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email eol-datahelp@ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author Chadwick V. Jay
Anthony Fischbach
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2013-02-25T15:50:27
Digital Object Identifier (DOI) https://doi.org/doi:10.5065/D6KW5D2X
Alternate Identifier 255.012
Resource Version 1.0
Topic Category oceans
Progress completed
Metadata Date 2021-11-29T11:00:00Z
Metadata Record Identifier edu.ucar.eol::255.012
Metadata Language eng; USA
Suggested Citation Chadwick V. Jay, Anthony Fischbach. (2013). Walrus Monthly Foraging Utilization Distribution in the Chukchi Sea: 2008-2011 [Jay]. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/doi:10.5065/D6KW5D2X. Accessed 29 May 2023.

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