>MONTHLY SST ANOMALY MAP
The map of Global OI.v2 SST anomalies for February 2010 downloaded from the NOMADS website is shown below.
February 2010 SST Anomalies Map (Global SST Anomaly = +0.285 deg C)
Global SST anomalies continued to drop in small monthly increments. They dropped 0.008 deg C between January and February. SST Anomalies in both the Southern and Northern Hemispheres declined. The equatorial Pacific remains in El Nino conditions (Monthly NINO3.4 SST Anomaly = +1.24 deg C and Weekly NINO3.4 SST Anomaly = +1.14 deg C), but SST anomalies there are dropping. Monthly NINO3.4 SST anomalies dropped 0.27 in February, and weekly data NINO3.4 SST anomalies have dropped (-0.8 deg C) from their peak over the past ten weeks. The Indian Ocean and the East Indian-West Pacific Ocean datasets both show significant rises this month.
Monthly Change = -0.008 deg C
NINO3.4 SST Anomaly
Monthly Change = -0.31 deg C
EAST INDIAN-WEST PACIFIC
The East Indian and West Pacific SST Anomalies are showing an increase. I’ve added this dataset in an attempt to draw attention to the atypical response. Using the 1986/87/88 and 1997/98 El Nino events as references, East Indian-West Pacific SST Anomalies peak about 7 to 9 months after the peak of the NINO3.4 SST anomalies, so we shouldn’t expect any visible sign of a step change for almost 18 to 24 months. We’ll just have to watch and see. I’ve also revised the blocked question in the illustration to include “& 2010/11 La Nina”, since the rise would actually occur during, and be caused in part by, the La Nina event.
East Indian-West Pacific (60S-65N, 80E-180)
Monthly Change = +0.181 deg C
Further information on the upward “step changes” that result from strong El Nino events, refer to my posts from a year ago Can El Nino Events Explain All of the Global Warming Since 1976? – Part 1 and Can El Nino Events Explain All of the Global Warming Since 1976? – Part 2
And for the discussions of the processes that cause the rise, refer to More Detail On The Multiyear Aftereffects Of ENSO – Part 2 – La Nina Events Recharge The Heat Released By El Nino Events AND…During Major Traditional ENSO Events, Warm Water Is Redistributed Via Ocean Currents -AND- More Detail On The Multiyear Aftereffects Of ENSO – Part 3 – East Indian & West Pacific Oceans Can Warm In Response To Both El Nino & La Nina Events
NOTE ABOUT THE DATA
The MONTHLY graphs illustrate raw monthly OI.v2 SST anomaly data from November 1981 to February 2009.
MONTHLY INDIVIDUAL OCEAN AND HEMISPHERIC SST UPDATES
Monthly Change = -0.010 deg C
Monthly Change = -0.006 deg C
North Atlantic (0 to 75N, 78W to 10E)
Monthly Change = +0.063 deg C
South Atlantic (0 to 60S, 70W to 20E)
Monthly Change = -0.117 deg C
North Pacific (0 to 65N, 100 to 270E, where 270E=90W)
Monthly Change = -0.043 Deg C
South Pacific (0 to 60S, 145 to 290E, where 290E=70W)
Monthly Change = -0.158 deg C
Indian Ocean (30N to 60S, 20 to 145E)
Monthly Change = +0.203 deg C
Arctic Ocean (65 to 90N)
Monthly Change = -0.019 deg C
Southern Ocean (60 to 90S)
Monthly Change = +0.086 deg C
WEEKLY NINO3.4 SST ANOMALIES
The weekly NINO3.4 SST anomaly data illustrate OI.v2 data centered on Wednesdays. The latest weekly NINO3.4 SST anomalies are +1.14 deg C, down 0.08 Deg C from a peak of 1.94 Deg C ten weeks ago.
Weekly NINO3.4 (5S-5N, 170W-120W)
The Optimally Interpolated Sea Surface Temperature Data (OISST) are available through the NOAA National Operational Model Archive & Distribution System (NOMADS).