Modeling dynamics and thermodynamics of icebergs in the Barents Sea from 1987 to 2005

TitleModeling dynamics and thermodynamics of icebergs in the Barents Sea from 1987 to 2005
Publication TypeJournal Article
Year of Publication2010
AuthorsKeghouche, I, Counillon, F, Bertino, L
JournalJournal of Geophysical Research
Volume115
NumberC12062
Number of Pages14
PublisherAmerican Geophysical Union
Abstract

A modeling study of iceberg drift characteristics in the Barents and Kara Seas for the period 1987-2005 is presented. Maps of iceberg density and potential locations subject to ground- ing complement sparse existing oceanographic and aerial field survey campaigns. The model suggests preferential pathways from the most important calving sources. Icebergs originating from Franz Josef Land have the largest spread over the domain. Simulations confirm the previously observed seasonal cycle of the southernmost extent of the icebergs. Strong interannual variability of the iceberg extent with a weak decreasing trend occurs, similar to the observed sea-ice extent. Analysis of the atmospheric forcing reveals that years with anomalous northerly winds enhance the southward iceberg extension. Northerly winds also have a positive delayed impact on the iceberg extent. They limit the inflow of Atlantic Water into the Barents Sea and therefore its heat content the following year, in- creasing the mean age of icebergs and thus their potential extension. Finally, the model is able to reproduce the observed extreme iceberg extension southeast of the Barents Sea in May 2003.

URLhttp://www.agu.org/contents/journals/ViewPapersInPress.do?journalCode=JC
DOIdoi:10.1029/2010JC006165
Refereed DesignationRefereed
Author Address

NERSC

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