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Observing Deep Water Dynamics in the Arctic Ocean: Insights from the Canada Basin

This study explores the dynamics of the isolated Canada Basin, where deep waters (>2400 m) have been removed from shallow water influence for approximately 500 years. Initial observations from the 2002 PITSA mooring indicated unexpected activity within this deep basin. Our research aims to determine the level of dynamism in this region, the sources of the observed activity, and how shallow water changes affect deep water environments. Two moorings will be deployed from August 2007 to 2008 to gather data that could illuminate the broader impacts of Arctic Ocean changes.

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Observing Deep Water Dynamics in the Arctic Ocean: Insights from the Canada Basin

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  1. IPY: Observing the dynamics of the deepest waters in the Arctic OceanMary-Louise Timmermans & Luc Rainville, WHOI

  2. Background • The deep (>2400 m) Canada Basin has been isolated from shallow waters for ≈ 500 yrs. • Preliminary measurements (PITSA mooring, 2002) show an unexpectedly active deep basin. • Is the deep basin more dynamic than previously supposed, or are the events unusual? • What is the source of activity? How do shallow water changes propagate to the deep? • Plan: deploy deep instruments on two moorings • in the Canada Basin over one year, 2007-2008. • Goal: to uncover the dynamics of the deep water • and understand the potential impact of a changing • Arctic Ocean on these waters.

  3. Instruments to be deployed on the deep portion of 2 Beaufort Gyre Observing System Moorings (Andrey Proshutinsky et al.)

  4. Moored instruments in the deep Canada Basin for IPY 2007-2008 Deployment from CCGS LSSL in Aug. 2007, recovery in 2008 Data will be made available at www.whoi.edu/beaufortgyre/data.html Alaska

  5. Site D: Instrument configuration

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