Circulation and Modification of Warm Deep Water on the Central Amundsen Shelf SCIE SCOPUS

Cited 39 time in WEB OF SCIENCE Cited 43 time in Scopus
Title
Circulation and Modification of Warm Deep Water on the Central Amundsen Shelf
Author(s)
Ha, H. K.; Wahlin, A. K.; Kim, T. W.; Lee, S. H.; Lee, J. H.; Lee, H. J.; Hong, C. S.; Arneborg, L.; Bjork, G.; Kalen, O.
KIOST Author(s)
Lee, Jae Hak(이재학)
Publication Year
2014-05
Abstract
The circulation pathways and subsurface cooling and freshening of warm deep water on the central Amundsen Sea shelf are deduced from hydrographic transects and four subsurface moorings. The Amundsen Sea continental shelf is intersected by the Dotson trough (DT), leading from the outer shelf to the deep basins on the inner shelf. During the measurement period, warm deep water was observed to flow southward on the eastern side of DT in approximate geostrophic balance. A northward outflow from the shelf was also observed along the bottom in the western side of DT. Estimates of the flow rate suggest that up to one-third of the inflowing warm deep water leaves the shelf area below the thermocline in this deep outflow. The deep current was 1.2 degrees C colder and 0.3 psu fresher than the inflow, but still warm, salty, and dense compared to the overlying water mass. The temperature and salinity properties suggest that the cooling and freshening process is induced by subsurface melting of glacial ice, possibly from basal melting of Dotson and Getz ice shelves. New heat budgets are presented, with a southward oceanic heat transport of 3.3 TW on the eastern side of the DT, a northward oceanic heat transport of 0.5-1.6 TW on the western side, and an ocean-to-glacier heat flux of 0.9-2.53 TW, equivalent to melting glacial ice at the rate of 83-237 km(3) yr(-1). Recent satellite-based estimates of basal melt rates for the glaciers suggest comparable values for the Getz and Dotson ice shelves.
ISSN
0022-3670
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2826
DOI
10.1175/JPO-D-13-0240.1
Bibliographic Citation
JOURNAL OF PHYSICAL OCEANOGRAPHY, v.44, no.5, pp.1493 - 1501, 2014
Publisher
AMER METEOROLOGICAL SOC
Subject
DOPPLER CURRENT PROFILERS; PINE ISLAND GLACIER; ICE-SHELF; SEA; INFLOW; VARIABILITY; ANTARCTICA; TROUGH; MODEL
Keywords
Upwelling/downwelling; Geographic location/entity; Southern Ocean; Topographic effects; Circulation/ Dynamics; Mixing
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