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Transport of Warm Upper Circumpolar Deep Water Onto the Western Antarctic Peninsula Continental Shelf : Volume 8, Issue 6 (15/12/2011)

By Martinson, D. G.

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Book Id: WPLBN0003981817
Format Type: PDF Article :
File Size: Pages 24
Reproduction Date: 2015

Title: Transport of Warm Upper Circumpolar Deep Water Onto the Western Antarctic Peninsula Continental Shelf : Volume 8, Issue 6 (15/12/2011)  
Author: Martinson, D. G.
Volume: Vol. 8, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Martinson, D. G. (2011). Transport of Warm Upper Circumpolar Deep Water Onto the Western Antarctic Peninsula Continental Shelf : Volume 8, Issue 6 (15/12/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Division of Ocean and Climate Physics, Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY, 10964, USA. Five thermistor-moorings were placed on the continental shelf of the Western Antarctic Peninsula (between 2007 and 2010) in an effort to identify the mechanism(s) responsible for delivering warm Upper Circumpolar Deep Water (UCDW) onto the broad continental shelf from the Antarctic Circumpolar Current (ACC) flowing over the adjacent continental slope. Historically, four mechanisms have been suggested (or assumed): (1) eddies shed from the ACC, (2) flow into the cross-shelf-cutting canyons with overflow onto the nominal shelf, (3) general upwelling, and (4) episodic sweeping of ACC meanders over the shelf. The mooring array showed that for the years of deployment, the dominant mechanism is eddies; upwelling may also contribute but to an unknown extent. Mechanisms 2 and 4 played no role, though the canyons have been shown previously to channel UCDW across the shelf into Marguerite Bay.

Summary
Transport of warm upper circumpolar deep water onto the Western Antarctic Peninsula Continental Shelf

Excerpt
Orsi, A. H., Whitworth, T., and Nowlin, W. D.: On the meridional extent and fronts of the Antarctic Circumpolar Current, Deep Sea Res., Part I, 42, 641–673, 1995.; Lilly, J. M. and Rhines, P. B.: Coherent eddies in the Labrador Sea observed from a mooring, J. Phys. Oce., 32, 585–598, 2002.; Cook, A. J., Fox, A. J., Vaughan, D. G., and Ferrigno, J. C.: Retreating glacial fronts on the Antarctic Peninsula over the past half-century, Science, 308, 541–544, 2005.; Hofmann, E. E., Wiebe, P., Costa, P., and Torres, J. J.: An overview of the southern ocean global ocean ecosystems dynamics program, Deep Sea Res. Part II, 51, 1921–1924, 2004.; Klinck, J. M., Hofmann, E. E., Beardsley, R. C., Salihoglu, B., and Howard, S.: Water-mass properties and circulation on the west Antarctic peninsula continental shelf in austral fall and winter 2001, Deep Sea Res. Part II, 51, 1925–1946, 2004.; Martinson, D. G., Stammerjohn, S. E., Iannuzzi, R. A., Smith, R. C., and Vernet, M.: Western Antarctic Peninsula physical oceanography and spatio-temporal variability, Deep Sea Res. Part II, 55, 1964–1987, 2008.; Moffat, C., Owens, B., and Beardsley, R. C.: On the characteristics of Circumpolar Deep Water intrusions to the west Antarctic Peninsula Continental Shelf, J. Geophys. Res., 114, C05017, 1–16, 2009.; Pawlowicz, R., Beardsley, B., and Lentz, S.: Classical tidal harmonic analysis including error estimates in MATLAB using T{_}TIDE, Computers and Geosciences, 28, 929–937, 2002.; Rignot, E., Bamber, J. L., van den Broeke, M. R., Davis, C., Li, Y., van de Berg, W. J., and van Meijgaard, E.: Recent Antarctic ice mass loss from radar interferometry and regional climate modeling, Nat.Geosci., 1, 106–110, 2008.; Smith, R. C., Baker, K. S., Fraser, W. R., Hofmann, E. E., Karl, D. M., Klinck, J. M., Quetin, L. B., Prézelin, B. B., Ross, R. M., Trivelpiece, W. Z., and Vernet, M.: The Palmer Pal LTER: A long-term ecological research program at Palmer Station, Antarctica, Oceanography, 8, 77–86, 1995.; Vaughan, D. G.: How does the Antarctic ice sheet affect sea level rise?, Science, 308, 1877–1878, 2005.; Webb, L.: Deep waters melting West Antarctica Ice Sheet Fringe mirror global ocean exponential warming, MA thesis, Columbia University, 2011.

 

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