U. Victoria
Regional Oceanography Affecting the NEPTUNE Array
Ken Denman
School of Earth and Ocean Sciences &Ocean Networks Canada
University of Victoria, BC, CanadaEmail: [email protected]
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Winter/Summer
Atmospheric Surface Pressure Patterns
http://unimak.us/climate.shtml
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Large Scale Surface Currents
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www.earthtimes.org
Summer
Winter
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Annual average surface NO3 concentrations (mmoles-N m-3) from the World Ocean Atlas
From: Denman and Peña, 2000. In: The Changing Ocean Carbon Cycle, CUP.
Mean SeaWiFS Surface Chlorophyll 1997-2010
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Oxygen on WOCE Line P01 at 48°N
6http://www.ewoce.org/
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Silica on WOCE Line P01 at 48°N
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Northward Flowing California Undercurrent• Over the slope200 - ~800 m
• Core around 400 m• ‘Old’ water- low O2, low pH- high DIC, high dissolved nutrients
• Upwells in submarine canyons onto shelf during strong summerupwelling
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Krassovski, 2008. MSc ThesisUniversity of Victoria
Arrows indicate direction of the wind and strength.
Shaded ocean areas indicate high wind speed.
Seasonal Wind Stress – Vanc. Is. to Baja
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Huyer, A., 1983. Coastal upwelling in the California Current system, Prog. Oceanogr., 12:259-284.
Victoria
Red indicates high chlorophyll concentrations on this colour scale
Upper Water Chlorophyll
Concentrations from Satellite Images
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°C
Weakening El Niño La Niña
Strong El Niño
Sea Surface Temperature Anomalies (°C)
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March1998
March2012
a b c
e f
http://www.esrl.noaa.gov/psd/about/
October2013
g
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Multiple Stressors: Decreasing arag & O2
Dissolved Oxygen at 125 m, south of La Pérouse Bank in
water 143 m deep.
Deptharag = 1
Feely et al. 2008. Science 320:
1490-1492
From: Crawford and Peña, 2013Atmosphere-Ocean,
DOI:10.1080/07055900.2012.753028.
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