NMML Killer Whale Vessel Survey, Bering Sea, 1993Entry ID: seamap145
Abstract: From 13 July to 24 August, 1993, a part of a larger study, the Bering
Sea was surveyed for killer whales (Orcinus orca) from the NOAA Glorita using
line transect methodology. To provide adequate coverage throughout the area,
the study was limited to areas of known killer whale concentrations. The vessel
was 44.8 m (147 ft) long and had a bridge height of 8.8 m (29 feet).
Purpose: The objectives of this study were as follows: 1) Develop a
photographic identification catalogue of each killer whale encountered, and its
pod, to determine pod identity, distribution, and movements relative to annual
survey effort. 2) Obtain minimum population estimated of killer whales in the
southeastern Bering Sea, central/eastern Aleutian Islands, western Gulf of
Alaska (including Prince William Sound), and southeastern Alaska. 3) Establish
baseline data for detecting annual changes in abundance.
CURRENTNESS REFERENCE: ground condition
SPATIAL REFERENCE INFORMATION -
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
Data Set Citation
Dataset Originator/Creator: National Marine Mammal Laboratory
Dataset Title: NMML Killer Whale Vessel Survey, Bering Sea, 1993
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-08-09 16:55:12.00689-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital dataOnline Resource: http://nmml.afsc.noaa.gov/
This data set description is a member of a collection. The collection is described in
Start Date: 1993-08-16Stop Date: 1993-08-24
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
Access Constraints ACCESS CONSTRAINTS: Open public unless otherwise noted.
DISTRIBUTION LIABILITY: Not to hold OBIS-SEAMAP liable for errors in the data.
While we have made every effort to ensure the quality of the database, we
cannot guarantee the accuracy of these datasets. Also please refer to Use
Use Constraints Not to use data contained in OBIS-SEAMAP in any publication, product, or
commercial application without prior written consent of the original data
provider. To cite both the data provider and OBIS-SEAMAP appropriately after
approval of use is obtained. Also please refer to Distribution Liability.
Data Set Progress
Distribution Format: Shapefile
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Marshall, G. J., 2003: Trends in the Southern Annular Mode from observations and reanalyses. J. Climate, 16, 4134-4143.
Jones, J. M., and M. Widmann, 2004: Atmospheric science - Early peak in Antarctic Oscillation index. Nature, 432, 290-291.
Marshall, G. J., 2007: Half-century seasonal relationships between the Southern Annular Mode and Antarctic temperatures. Int. J. Climatol., 27, 373-383.
Visbeck, M., 2009: A station-based Southern Annular Mode index from 1884 to 2005. J. Climate, 22, 940-950.
Jones, J. M., R. L. Fogt, M. Widmann, G. J. Marshall, P. D. Jones, and M. Visbeck, 2009: Historical SAM Variability. Part I: Century length seasonal reconstructions. J. Climate, in press.
Fogt, R. L., J. Perlwitz, A. J. Monaghan, D. H. Bromwich, J. M. Jones, and G. J. Marshall, 2009: Historical SAM Variability. Part II: 20th century variability and trends from reconstructions, observations, and the IPCC AR4 Models. J. Climate, revised.
Creation and Review Dates
DIF Creation Date: 2010-10-14
Last DIF Revision Date: 2012-02-15