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

Metadata Updated: April 9, 2021

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.

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Dates

Metadata Date April 1, 2021
Metadata Created Date April 9, 2021
Metadata Updated Date April 9, 2021
Reference Date(s) September 21, 2020 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NGDC MGG Passive Acoustic

Graphic Preview

Study area. Credit: NOAA

Additional Metadata

Resource Type Series
Metadata Date April 1, 2021
Metadata Created Date April 9, 2021
Metadata Updated Date April 9, 2021
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
Licence
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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