Seals map bathymetry of the Antarctic continental shelf
Costa, Daniel P.
Bolmer, S. Thompson
Goebel, Michael E.
Huckstadt, Luis A.
McDonald, Birgitte I.
Shoosmith, Deborah R.
MetadataShow full item record
We demonstrate the first use of marine mammal dive-depth data to improve maps of bathymetry in poorly sampled regions of the continental shelf. A group of 57 instrumented elephant seals made on the order of 2 × 105 dives over and near the continental shelf on the western side of the Antarctic Peninsula during five seasons, 2005–2009. Maximum dive depth exceeded 2000 m. For dives made near existing ship tracks with measured water depths H<700 m, ∼30% of dive depths were to the seabed, consistent with expected benthic foraging behavior. By identifying the deepest of multiple dives within small areas as a dive to the seabed, we have developed a map of seal-derived bathymetry. Our map fills in several regions for which trackline data are sparse, significantly improving delineation of troughs crossing the continental shelf of the southern Bellingshausen Sea.
Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 37 (2010): L21601, doi:10.1029/2010GL044921.
Showing items related by title, author, creator and subject.
A high-resolution bathymetry map for the Marguerite Bay and adjacent west Antarctic Peninsula shelf for the Southern Ocean GLOBEC Program Bolmer, S. Thompson; Beardsley, Robert C.; Pudsey, C.; Morris, P.; Wiebe, Peter H.; Hofmann, Eileen E.; Anderson, J.; Maldonado, A. (Woods Hole Oceanographic Institution, 2004-05)One objective of the U.S. Southern Ocean Global Ocean Ecosystems Dynamics (SO GLOBEC) program is to gain a better understanding of the sea floor bathymetry in the program study area. Much of Marguerite Bay and the ...
Atlantic water variability on the SE Greenland continental shelf and its relationship to SST and bathymetry Sutherland, David A.; Straneo, Fiamma; Stenson, Garry B.; Davidson, Fraser J. M.; Hammill, Mike O.; Rosing-Asvid, Aqqalu (John Wiley & Sons, 2013-02-20)Interaction of warm, Atlantic-origin water (AW) and colder, polar origin water (PW) advecting southward in the East Greenland Current (EGC) influences the heat content of water entering Greenland's outlet glacial fjords. ...
ten Brink, Uri S.; Schneider, Christopher (Geological Society of America, 1995-07)We propose a simple model for the unusual depositional sequences and morphology of the Antarctic continental shelf. Our model considers the regional stratal geometry and the reversed morphology of the Antarctic continental ...