Seals map bathymetry of the Antarctic continental shelf

Details Seals map bathymetry of the Antarctic continental shelf Seals map bathymetry of the Antarctic continental shelf

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3721601p&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 21, CiteID L21601

Mathematics

Logic

5

Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Cryosphere: Ice Shelves, Oceanography: Biological And Chemical: Instruments, Sensors, And Techniques

Scientific paper

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.

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