| This La Nina Likely to Have Legs |
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| Written by Joseph D’Aleo, CCM, via icecap.us | |
| Wednesday, 27 February 2008 | |
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Page 1 of 2 Evidence is growing this La Nina will be a longer term event. Most
similar important La Ninas are often multi year events
(1949-1951,1954-1956, 1961-63, 1970-1972, 1973-1976, 1998-2001). Though
the easternmost Pacific near South America has warmed at the surface as
the seasonal weakening of the tropical easterlies led to weakened
upwelling, it is still cold beneath. Below you can see the latest
depth-section of ocean temperatures (top) and anomalies (bottom).
Temperature are in degree Celsius. Note the large reservoir of
subsurface anomalously cold water (up to 4 degrees C) in the eastern
tropical Pacific at 50 to 100 meters.
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