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    • Gulf of Alaska Line-Transect Survey (GOALS) II: Marine Mammal Occurrence in the Temporary Maritime Activities Area (TMAA) 2013 Raw Sonobuoy Data

    Metadata Updated: June 9, 2023

    The U.S. Navy periodically uses a Temporary Maritime Activities Area (TMAA) in the central Gulf of Alaska (GoA), east of Kodiak Island. Current scientific data on affected biological and environmental resources are necessary to conduct analyses required for Navy training, exercise, and technology-acquisition activities. In the summer of 2013, the Navy funded a vessel-based survey (Gulf of Alaska Line-Transit Survey (GOALS)) to fill in the gaps of knowledge on distribution, movements, and densities of marine mammals within this training area. The Marine Mammal Laboratory conducted passive acoustic monitoring during this survey cruise. Directional Frequency Analysis and Recording (DiFAR) sonobuoys were deployed approximately every 2 to 3 hours to obtain an evenly sampled census of marine mammal vocalizations; a total of 186 sonobuoys were deployed. Sonobuoys were analyzed in real time for presence/absence of calls from cetaceans; calls were detected on 80 percent of the sonobuoys, including the study area and transit to Kodiak, Alaska. There were seven confirmed species detected: blue, fin, humpback, killer, sei, North Pacific right, and sperm whales, and additional call detections that could not be classified to species. All sonobuoys were provided by the United States Navy (Naval Operational Logistics Support Center, Naval Surface Warfare Center, Crane Division, and the Office of the Assistant Secretary of the Navy).

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 9, 2021
    Metadata Created Date April 9, 2021
    Metadata Updated Date June 9, 2023
    Reference Date(s) September 21, 2020 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NGDC MGG Passive Acoustic

    Other Data Resources

    Graphic Preview

    Study area. Credit: NOAA

    Additional Metadata

    Resource Type Series
    Metadata Date September 9, 2021
    Metadata Created Date April 9, 2021
    Metadata Updated Date June 9, 2023
    Reference Date(s) September 21, 2020 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei.pad:AFSC_GA13_Raw_Data
    Access Constraints Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Cite as: NOAA Alaska Fisheries Science Center. 2020. Gulf of Alaska Line-Transect Survey (GOALS) II: Marine Mammal Occurrence in the Temporary Maritime Activities Area (TMAA) 2013 Raw Sonobuoy Data. NOAA National Centers for Environmental Information. https://doi.org/10.25921/psnz-8v87 [access date].
    Bbox East Long -141.33573
    Bbox North Lat 59.55247
    Bbox South Lat 55.30927
    Bbox West Long -152.66155
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Study area. Credit: NOAA
    Graphic Preview File https://www.ngdc.noaa.gov/mgg/pad/browse/AFSC_GA13.png
    Graphic Preview Type png
    Harvest Object Id f3b0e817-c0a3-44f0-9f44-48f4ba7defbb
    Harvest Source Id 8812445c-2f10-47c5-80d9-c1bc92ca956d
    Harvest Source Title NGDC MGG Passive Acoustic
    Licence
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-152.66155, 55.30927], [-141.33573, 55.30927], [-141.33573, 59.55247], [-152.66155, 59.55247], [-152.66155, 55.30927]]]}
    Progress complete
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2013-06-24T00:00:00
    Temporal Extent End 2013-07-19T00:00:00

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