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Laurentian Fan Moored Currents Data May 2006 – May 2007

Laurentian Fan Moored Currents Data May 2006 – May 2007. John Loder and Yuri Geshelin - 13 June 2008. Part of project “Current Statistics from Deep-Water Drifters and other Measurements in Atlantic Slope Frontier Gas Areas ”

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Laurentian Fan Moored Currents Data May 2006 – May 2007

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  1. Laurentian Fan Moored Currents DataMay 2006 – May 2007 John Loder and Yuri Geshelin - 13 June 2008 Part of project “Current Statistics from Deep-Water Drifters and other Measurements in Atlantic Slope Frontier Gas Areas” Funded by Unconventional Gas Supply Program of the Canadian Climate Technology and Innovation Initiative (CCTII) Carried out by Fisheries and Ocean Canada (DFO), Bedford Institute of Oceanography Contact: John Loder (902-426-3146) or Yuri Geshelin (902-426-3584)

  2. CCTII Moored Currents Data for Laurentian Fan Previous (●) and CCTII (▲) Deployment Sites Example DFO/CCTII Mooring 1975m Current Meter 2000m RCM11 Current Meter at 25 m above bottom CCTII moorings on 1100 and 2000m isobaths from May 2006 to May 2007

  3. Site LF-A: 44 45’N, 56 5.5’W - 25 m above bottom in Water Depth of 1104 m

  4. Site LF-B: 44 32.6’N, 56 3.5’W - 25 m above bottom in Water Depth of 2009 m

  5. Comparison of Near-Bottom Currents Speeds at LF-A and LF-B

  6. Statistics of Current Speed at the 2 Sites

  7. Progressive Vector (Drift) Plots from 2006-07 Moored Currents Data LF-A (1100 m) LF-A (1100 m) : Drift of about 2 cm/s towards WSW (expected drift direction) • LF-B (2000 m) : Drift of about 1 cm/s towards SSE • Weak current drift • Not understood why drift to SSE instead of SW (possibly a local topography effect) LF-B (2000 m)

  8. Comparison with Currents Speeds in Other Areas Mean and Maximum Near-Bottom Current Speeds in 1 year records at Sites along the 1100-m and 2000-m isobaths 1100-m Isobath: Stronger Means on LS then FP (no data from SWGB) 2000-m Isobath: Strongest Max on SWGB (no data from FP and LS) Weakest Currents on Laurentian Fan SS= Scotian Slope LF= Laurentian Fan SWGB= SW Grand Bank FP= Flemish Pass OB= Orphan Basin LS= Labrador Slope

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