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Characteristics of warm water intrusions in a submarine trough on the central amundsen shelf.

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Title
Characteristics of warm water intrusions in a submarine trough on the central amundsen shelf.
Other Titles
해저채널을 따라 아문젠해로 유입되는 고온수의 특성.
Authors
Wahlin, Anna K
Kim, Tae-Wan
Ha, Ho Kyung
Lee, Sang H.
Lee, Jae-Hak
C. Stranne
L. Arnegorg
G. Bjork
O. Kalen
Keywords
Amundsen Sea; CDW
Issue Date
2012
Citation
Wahlin, Anna K, et al. 2012. Characteristics of warm water intrusions in a submarine trough on the central amundsen shelf.. KOPRI International Polar Symposium. KOPRI International Polar Symposium. 2012.11.23~.
Abstract
Two moorings have been placed on either side of a deep trough leading into the deep shelf basin in the Western and Central Amundsen Shelf. The moorings measure current speed, temperature, salinity and oxygen content from about 300 m depth to the bottom (at ≈550 m depth), and the results are used to characterize the inflows of warm deep water, its variability, and connect the observed variability to meteorological forcing. An average flow of warm deep water towards the ice shelves was observed on the eastern side of the channel. The bottom water on the western side of the channel was colder and fresher than on the eastern side, but still warmer than the cold and fresh surface layer. The average flow direction in the deep water was away from the iceshelves on the western side. This indicates a net circulation of warm deep water where warm,salty CDW flows southward on the eastern side of the channel, and after interaction with the iceshelves flows northward steered by the topography on the western side of the channel. The flow in the trough is dominated by barotropic fluctuations that do not contribute to the on- shelf heat transport. Along-shelf wind at the shelf break is correlated to the barotropic fluctuations in the eastern part of the channel. This result agrees with previous model studies from the West Antarctic Peninsula and the Amundsen Sea. The flow also consists of a baroclinicth to the bottom (at ≈550 m depth), and the results are used to characterize the inflows of warm deep water, its variability, and connect the observed variability to meteorological forcing. An average flow of warm deep water towards the ice shelves was observed on the eastern side of the channel. The bottom water on the western side of the channel was colder and fresher than on the eastern side, but still warmer than the cold and fresh surface layer. The average flow direction in the deep water was away from the iceshelves on the wester
URI
http://repository.kopri.re.kr/handle/201206/8386
Conference Name
KOPRI International Polar Symposium
Conference Place
KOPRI International Polar Symposium
Conference Date
2012.11.23~
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