Abstract:
:Mass loss from the West Antarctic ice shelves and glaciers has been linked to basal melt by ocean heat flux. The Totten Ice Shelf in East Antarctica, which buttresses a marine-based ice sheet with a volume equivalent to at least 3.5 m of global sea-level rise, also experiences rapid basal melt, but the role of ocean forcing was not known because of a lack of observations near the ice shelf. Observations from the Totten calving front confirm that (0.22 ± 0.07) × 106 m3 s-1 of warm water enters the cavity through a newly discovered deep channel. The ocean heat transport into the cavity is sufficient to support the large basal melt rates inferred from glaciological observations. Change in ocean heat flux is a plausible physical mechanism to explain past and projected changes in this sector of the East Antarctic Ice Sheet and its contribution to sea level.
journal_name
Sci Advjournal_title
Science advancesauthors
Rintoul SR,Silvano A,Pena-Molino B,van Wijk E,Rosenberg M,Greenbaum JS,Blankenship DDdoi
10.1126/sciadv.1601610subject
Has Abstractpub_date
2016-12-16 00:00:00pages
e1601610issue
12issn
2375-2548pii
1601610journal_volume
2pub_type
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