Walrus Monthly Foraging Utilization Distribution in the Chukchi Sea: 2008-2011
[Jay]
https://data.eol.ucar.edu/dataset/255.012

Summary
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.

Identifiers
 * Local archive identifier: 255.012
 * doi:10.5065/D6KW5D2X
   https://doi.org/10.5065/D6KW5D2X

Versions
  1.0

Citation
 Jay, C., Fischbach, A. 2013. Walrus Monthly Foraging Utilization Distribution
 in the Chukchi Sea: 2008-2011. Version 1.0. UCAR/NCAR - Earth Observing
 Laboratory. https://doi.org/10.5065/D6KW5D2X Accessed 19 Apr 2024.

Additional citation styles can be generated by entering the DOI
at CrossCite (https://citation.crosscite.org/).

Acknowledgement
In addition to the citation reference and any other acknowledgements,
please acknowledge NCAR/EOL in your publications with text such as:

  Data provided by NCAR/EOL under the sponsorship of
  the National Science Foundation.
  https://data.eol.ucar.edu/

Related projects
 * PacMARS: Pacific Marine Arctic Regional Synthesis
   https://data.eol.ucar.edu/project/PacMARS

Additional information
 * Spatial Type: grid
 * Frequency: no set schedule
 * Progress: completed
 * Language: English

ISO Topic Categories
 * oceans

Categories
 * Arctic
 * Biology
 * Ecology
 * Mammals

Platforms
 * Ships

Instruments
 * GPS Receivers

GCMD Science Keywords
 * EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > USE/FEEDING HABITATS
 * EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > RANGE CHANGES
 * EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES

Documentation
 * walrus_jay_readme.txt [2 KiB]
   https://data.eol.ucar.edu/file/download/4286D1540C68/walrus_jay_readme.txt

Related links
 * download: Walrus areas of use in the Chukchi Sea during sparse sea ice cover
   https://www.sciencebase.gov/catalog/item/508ef7f0e4b0b59cf7f5a809
 * homepage: PacMARS Home Page
   https://data.eol.ucar.edu/dataset/list?project=364
 * info: NOAA Arctic Environmental Response Management Application
   https://www.erma.unh.edu/arctic/erma.html#x=-165.88256&y=69.48068&z=5&layers=13439+13541+13542+13543+13544+13545
 * info: PacMARS Data Policy
   https://data.eol.ucar.edu/arctic_projects/pacmars/docs/data_policy-pacmars.pdf
 * info: Walrus areas of use in the Chukchi Sea during sparse sea ice cover, Marine Ecology Progress Series
   https://doi.org/10.3354/meps10057

Temporal coverage
 * Begin datetime: 2008-06-01 00:00:00 
 * End datetime: 2011-11-30 23:59:00 

Spatial coverage
 * Maximum (North) Latitude: 75.00
 * Minimum (South) Latitude: 65.00
 * Minimum (West) Longitude: 172.00
 * Maximum (East) Longitude: -156.00

Primary contact information
 * pointOfContact: Chadwick V. Jay <cjay@usgs.gov>
   https://data.eol.ucar.edu/contact/show/884

Additional contact information
 * author: Chadwick V. Jay <cjay@usgs.gov>
   https://data.eol.ucar.edu/contact/show/884
 * pointOfContact: Chadwick V. Jay <cjay@usgs.gov>
   https://data.eol.ucar.edu/contact/show/884
 * author: Anthony Fischbach <afischbach@usgs.gov>
   https://data.eol.ucar.edu/contact/show/1607
 * principalInvestigator: Chadwick V. Jay <cjay@usgs.gov>
   https://data.eol.ucar.edu/contact/show/884

Alternate metadata formats
 * DataCite: https://data.eol.ucar.edu/dataset/255.012?format=datacite
 * ISO/TC 211: https://data.eol.ucar.edu/dataset/255.012?format=isotc211