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The Beaufort Gyre Observing System Andrey Proshutinsky and Richard Krishfield

The Beaufort Gyre Observing System Andrey Proshutinsky and Richard Krishfield Woods Hole Oceanographic Institution. 2003-2004 – supported by NSF; 2004-2005 – supported by WHOI; 2005-2009 – supported by NSF; 2009-2012 – pending proposal (NSF) to continue observational program and data analyses.

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The Beaufort Gyre Observing System Andrey Proshutinsky and Richard Krishfield

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  1. The Beaufort Gyre Observing System Andrey Proshutinsky and Richard Krishfield Woods Hole Oceanographic Institution 2003-2004 – supported by NSF; 2004-2005 – supported by WHOI; 2005-2009 – supported by NSF; 2009-2012 – pending proposal (NSF) to continue observational program and data analyses

  2. 45,000 km3 17,300 km3 The oceanic Beaufort Gyre (BG) of the Canadian Basin is the largest freshwater reservoir in the Arctic Ocean (Aagaard and Carmack, 1989). Freshwater content: calculated relative to salinity 34.80 according to Aagaard K. and E. Carmack, JGR, vol. 94, C10, 14,495-14,498,1989 2,800 km3 2,800 km3 3,800 km3 12,200 km3 3,400 km3 4,000 km3 77 km3

  3. Goal: • The major goal of this project is to understand the structure of the BG system, its regulating mechanisms, and impact on Arctic climate.

  4. 1950 1960 1970 1980 1990 2000 Year

  5. Coupling Diagram of the Beaufort Gyre System: Each component of the system stores and exchanges mass and energy differently during different climate regimes. Quantifying and describing the state and variability of these components and their coupling is essential to understand the state and fate of present day Arctic climate. Atmosphere Sea Ice Ocean Mixed Layer Pacific Halocline Atlantic Layer Deep Waters

  6. Beaufort Gyre Observing system2003-2008

  7. DATA: www.whoi.edu/beaufortgyre From moorings: T, S, currents, bottom pressure, and sea ice draft From summer surveys at CTD stations: Temperature, salinity, oxygen, nutrients, barium, δ18O, CFCs, carbon tetrachloride, alkalinity, total CO2, dissolved inorganic carbon and tritium/3He From drifting buoys (ITPs, IABPs, IMBs) year-round: T,S, sea ice and atmospheric parameters

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