u. victoria regional oceanography affecting the neptune array ken denman school of earth and ocean...

U. Victoria

Regional Oceanography Affecting the NEPTUNE Array

Ken Denman

School of Earth and Ocean Sciences &Ocean Networks Canada

University of Victoria, BC, CanadaEmail: denmank@uvic.ca

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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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Thanks

denmank@uvic.ca

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