Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3518602t&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 18, CiteID L18602
Physics
31
Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Oceanography: General: Continental Shelf And Slope Processes (3002), Oceanography: General: Numerical Modeling (0545, 0560), Cryosphere: Ice Shelves, Global Change: Cryospheric Change (0776)
Scientific paper
Results are presented from an isopycnic coordinate model of ocean circulation in the Amundsen Sea, focusing on the delivery of Circumpolar Deep Water (CDW) to the inner continental shelf around Pine Island Bay. The warmest waters to reach this region are channeled through a submarine trough, accessed via bathymetric irregularities along the shelf break. Temporal variability in the influx of CDW is related to regional wind forcing. Easterly winds over the shelf edge change to westerlies when the Amundsen Sea Low migrates west and south in winter/spring. This drives seasonal on-shelf flow, while inter-annual changes in the wind forcing lead to inflow variability on a decadal timescale. A modelled period of warming following low CDW influx in the late 1980's and early 1990's coincides with a period of observed thinning and acceleration of Pine Island Glacier.
Holland David
Jacobs Stan
Jenkins Adrian
Thoma Malte
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