Modeling the spreading of glacial meltwater from the Amundsen and Bellingshausen Seas

It has been suggested that an increased melting of continental ice in the Amundsen Sea (AS) and Bellingshausen Sea (BS) is a likely source of the observed freshening of Ross Sea (RS) water. To test this hypothesis, we simulate the spreading of glacial meltwater using the Finite Element Sea Ice/Ice S...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Nakayama, Yoshihiro, Timmermann, Ralph, Rodehacke, C. B., Schröder, Michael, Hellmer, Hartmut H.
Format: Article in Journal/Newspaper
Language:unknown
Published: American Geophysical Union 2014
Subjects:
Amundsen Sea
Bellingshausen Sea
Getz
Getz Ice Shelf
Ross Sea
Ice Shelf
Ice Shelves
Sea ice
Online Access:https://epic.awi.de/id/eprint/36977/
https://epic.awi.de/id/eprint/36977/1/grl52318.pdf
http://onlinelibrary.wiley.com/doi/10.1002/2014GL061600/abstract;jsessionid=071C10332639D59B18ABBC5B1108A1BE.f04t02
https://hdl.handle.net/10013/epic.44732
https://hdl.handle.net/10013/epic.44732.d001
Description
Summary:It has been suggested that an increased melting of continental ice in the Amundsen Sea (AS) and Bellingshausen Sea (BS) is a likely source of the observed freshening of Ross Sea (RS) water. To test this hypothesis, we simulate the spreading of glacial meltwater using the Finite Element Sea Ice/Ice Shelf/Ocean Model. Based on the spatial distribution of simulated passive tracers, most of the basal meltwater from AS ice shelves flows toward the RS with more than half of the melt originating from the Getz Ice Shelf. Further, the model results show that a slight increase of the basal mass loss can substantially intensify the transport of meltwater into the RS due to a strengthening of the melt-driven shelf circulation and the westward flowing coastal current. This supports the idea that the basal melting of AS and BS ice shelves is one of the main sources for the RS freshening.

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