HR: 0800h
AN: OS41A-0450    [Abstracts]
TI: Atlantic Water Seasonal Variability on the Continental Slope of the Laptev Sea
AU: * Dmitrenko, I
EM: igordm@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340 930 Koyukuk Drive, Fairbanks, AK 99775-7340 United States
AU: Polyakov, I
EM: igor@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340 930 Koyukuk Drive, Fairbanks, AK 99775-7340 United States
AU: Kirillov, S
EM: sealki@mail.ru
AF: Arctic and Antarctic Research Institute, 38 Bering St., St.Petersburg, 199397 Russian Federation
AU: Timokhov, L
EM: ltim@aari.nw.ru
AF: Arctic and Antarctic Research Institute, 38 Bering St., St.Petersburg, 199397 Russian Federation
AU: Simmons, H
EM: hsimmons@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340 930 Koyukuk Drive, Fairbanks, AK 99775-7340 United States
AU: Walsh, D
EM: walsh@wave.nrl.navy.mil
AF: Naval Research Laboratory, Stennis Space Center, Not available, Not available, MS 39529 United States
AU: Ivanov, V
EM: vivanov@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340 930 Koyukuk Drive, Fairbanks, AK 99775-7340 United States
AB: Due to the scarcity of observations, knowledge of circulation, water-mass transformations and exchanges occurring across the continental slope of the Siberian Arctic remains sketchy, and understanding of water dynamics is correspondingly crude. Here, we present our preliminary analysis of observational data obtained from the Laptev Sea continental slope in 2002-2003. The water properties were evaluated using year-long records of water temperature and salinity from the mooring deployed in September 2002 about 200 km northward from the continental shelf brake. CTD surveys from several cruises (1993, 1995, 1996, 2002, 2003 years) were also employed in this analysis. The focus of this study is the seasonal cycle found in the intermediate (150-800m) Atlantic Water layer of the Arctic Ocean. Increase of the Atlantic Water temperature was observed during the cold period whereas during summer months the records show cooling of the layer. We found a strong connection between these cooling and warming events and direction of winds over the slope. Wintertime prevailing off-slope winds cause shift of the warm core of the Atlantic Water towards the slope, and the mooring record indicated warming. Summertime along-slope winds resulted in separation of the Atlantic Water warm core from the slope and decrease of the recorded temperature. These results support the earlier theory by Goodkovich (1961).
UR: http://www.frontier.iarc.uaf.edu/NABOS/
DE: 4504 Air/sea interactions (0312)
DE: 4512 Currents
DE: 4520 Eddies and mesoscale processes
DE: 4536 Hydrography
DE: 4572 Upper ocean processes
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting