Introduction to Ocean Circulation - Geography 163. Wind-driven circulation of major gyres & surface currents Buoyancy-driven circulation linking the major gyres & the global conveyor belt Coastal circulations & land-ocean interactions Build from physical principles (w/out math). Approach.
How can it be constant?
1015 W = 1 Petawatt
The latest weekly SST departures are:
Niño 4 1.0ºC
Niño 3.4 1.1ºC
Niño 3 0.7ºC
Niño 1+2 0.1ºC
Since the beginning of June 2009, SST anomalies have been at least +0.5°C across most of the equatorial Pacific.
During December 2009, positive SST anomalies increased across much of the equatorial Pacific.
From late December 2009 to mid-February 2010, positive SST anomalies decreased across portions of the central and east-central Pacific.
Recently, positive SST anomalies have decreased over the central Pacific.
NPP = Net Primary Production
rate of C fixed by phytoplankton
Chlorophyll is found in all plants & phytoplankton
Averages are from persistently warm ocean (SST> 15C)
From Behrenfeld et al. 
It’s gotta go somewhere...
This is where.
Pacific Decadal Oscillation
Warm phase - southern
Cool phase - northern
We’re now in a cool phase…
eWOCE gallery – www.ewoce.org
AVHRR Ch 4