HR: 0800h
AN: C41A-0182    [Abstracts]
TI: Annual Freshwater and Heat Content From 2003-2004: First Results from the Beaufort Gyre Observing System
AU: * Proshutinsky, A
EM: aproshutinsky@whoi.edu
AF: Woods Hole Oceanographic Institution, 360 Woods Hole Road, Woods Hole, MA 02543 United States
AU: Krishfield, R
EM: rkrishfield@whoi.edu
AF: Woods Hole Oceanographic Institution, 360 Woods Hole Road, Woods Hole, MA 02543 United States
AU: Carmack, E
EM: CarmackE@pac.dfo-mpo.gc.ca
AF: Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, BC V8S 3J2 Canada
AU: McLaughlin, F
EM: McLaughlinF@pac.dfo-mpo.gc.ca
AF: Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, BC V8S 3J2 Canada
AU: Zimmerman, S
EM: ZimmermanS@pac.dfo-mpo.gc.ca
AF: Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, BC V8S 3J2 Canada
AU: Shimada, K
EM: shimadak@jamstec.go.jp
AF: Institute of Observational Research for Global Change, JAMSTEC, 2-15, Natsushima, Yokosuka, 237-0061 Japan
AU: Itoh, M
EM: itohm@jamstec.go.jp
AF: Institute of Observational Research for Global Change, JAMSTEC, 2-15, Natsushima, Yokosuka, 237-0061 Japan
AB: Seasonal variability of freshwater and heat content in the Beaufort Gyre will be presented, and causes of interannual changes will be discussed based on data from the Beaufort Gyre Freshwater Experiment (BGFE; http://www.whoi.edu/beaufortgyre), a prototype Ice-Tethered Profiler (ITP), and using CTD and XCTD data collected between 2001 and 2004. As part of the BGFE and in combination with the JWACS cruises on the CCGS Louis S. St. Laurent, three bottom-tethered moorings were deployed in August 2003 at coordinates 75N and 150W, 78N and 150W and 77N and 140W, and were recovered in August 2004. Year-long time series of sea ice draft (from upward looking sonars mounted at the top mooring float), temperature, salinity, and currents in the 50-2000m layer (from moored profilers), and bottom pressure (from pressure tide gauges) were retrieved from the instruments. Information in the upper ocean above 50 m, were also obtained from four drifting ice beacons which were also installed during the 2003 cruise and have telemetered temperature and salinity data at 10, 25, and 40 m for more than a full year. In order to continue collecting data from the Beaufort Gyre to study multiannual variability, the moorings were refurbished and redeployed in 2004 at the same locations and the buoy array was augmented with an ITP (providing CTD data with 1 meter vertical resolution and 6 hours temporal resolution down to 750 m) establishing the Beaufort Gyre Observing System (BGOS).
UR: http://www.whoi.edu/beaufortgyre
DE: 9315 Arctic region
DE: 4536 Hydrography
DE: 1655 Water cycles (1836)
DE: 1836 Hydrologic budget (1655)
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting