U. Victoria Regional Oceanography Affecting the NEPTUNE Array Ken Denman School of Earth and Ocean...
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Transcript of 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: [email protected]
INDEEP 24 April 14 1
INDEEP 24 April 14
Winter/Summer
Atmospheric Surface Pressure Patterns
http://unimak.us/climate.shtml
2
INDEEP 24 April 14
Large Scale Surface Currents
3
www.earthtimes.org
Summer
Winter
INDEEP 24 April 14 4
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
INDEEP 24 April 14 5http://oceancolor.gsfc.nasa.gov/
INDEEP 24 April 14
Oxygen on WOCE Line P01 at 48°N
6http://www.ewoce.org/
INDEEP 24 April 14
Silica on WOCE Line P01 at 48°N
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INDEEP 24 April 14
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
INDEEP 24 April 14 9
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
INDEEP 24 April 14 10
INDEEP 24 April 14
°C
Weakening El Niño La Niña
Strong El Niño
Sea Surface Temperature Anomalies (°C)
11
March1998
March2012
a b c
e f
http://www.esrl.noaa.gov/psd/about/
October2013
g
INDEEP 24 April 14
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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