Variability of Warm Deep Water Inflow in a Submarine Trough on the Amundsen Sea Shelf SCIE SCOPUS

Cited 48 time in WEB OF SCIENCE Cited 52 time in Scopus
Title
Variability of Warm Deep Water Inflow in a Submarine Trough on the Amundsen Sea Shelf
Author(s)
Wahlin, A. K.; Kalen, O.; Arneborg, L.; Bjoerk, G.; Carvajal, G. K.; Ha, H. K.; Kim, T. W.; Lee, S. H.; Lee, J. H.; Stranne, C.
KIOST Author(s)
Lee, Jae Hak(이재학)
Publication Year
2013-10
Abstract
The ice shelves in the Amundsen Sea are thinning rapidly, and the main reason for their decline appears to be warm ocean currents circulating below the ice shelves and melting these from below. Ocean currents transport warm dense water onto the shelf, channeled by bathymetric troughs leading to the deep inner basins. A hydrographic mooring equipped with an upward-looking ADCP has been placed in one of these troughs on the central Amundsen shelf. The two years (2010/11) of mooring data are here used to characterize the inflow of warm deep water to the deep shelf basins. During both years, the warm layer thickness and temperature peaked in austral fall. The along-trough velocity is dominated by strong fluctuations that do not vary in the vertical. These fluctuations are correlated with the local wind, with eastward wind over the shelf and shelf break giving flow toward the ice shelves. In addition, there is a persistent flow of dense lower Circumpolar Deep Water (CDW) toward the ice shelves in the bottom layer. This bottom-intensified flow appears to be driven by buoyancy forces rather than the shelfbreak wind. The years of 2010 and 2011 were characterized by a comparatively stationary Amundsen Sea low, and hence there were no strong eastward winds during winter that could drive an upwelling of warm water along the shelf break. Regardless of this, there was a persistent flow of lower CDW in the bottom layer during the two years. The average heat transport toward the ice shelves in the trough was estimated from the mooring data to be 0.95 TW.
ISSN
0022-3670
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3090
DOI
10.1175/JPO-D-12-0157.1
Bibliographic Citation
JOURNAL OF PHYSICAL OCEANOGRAPHY, v.43, no.10, pp.2054 - 2070, 2013
Publisher
AMER METEOROLOGICAL SOC
Keywords
Southern Ocean; Ekman pumping; transport; Seasonal variability
Type
Article
Language
English
Document Type
Article
Publisher
AMER METEOROLOGICAL SOC
Related Researcher
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse