>July 2009 SST Anomaly Update

>MONTHLY SST ANOMALY MAP

The map of Global OI.v2 SST anomalies for July 2009 downloaded from the NOMADS website is shown below.
http://i32.tinypic.com/ilanx5.png
July 2009 SST Anomalies Map (Global SST Anomaly = +0.28 deg C)

MONTHLY OVERVIEW

Global SST anomalies dropped very slightly, approximately 0.009 deg C, in July. The 0.042 deg C rise in the Northern Hemisphere SST anomalies was countered by a 0.049 deg C decline in the Southern Hemisphere. The equatorial Pacific shows El Nino conditions (Monthly NINO3.4 SST Anomaly = +0.86 deg C and Weekly NINO3.4 SST Anomaly = +0.77 deg C). Monthly NINO3.4 SST anomalies rose 0.24 deg C in July, while the weekly data shows NINO3.4 SST anomalies have leveled off for the past few weeks.
http://i25.tinypic.com/24g7kwj.png
Global
Monthly Change = -0.009 deg C
############
http://i29.tinypic.com/11w3bz7.png
NINO3.4 SST Anomaly
Monthly Change = +0.242 deg C

AMO

My Usual AMO Blurb: The Atlantic Multidecadal Oscillation as calculated by the NOAA ESRL is North Atlantic SST anomalies that have been detrended. Since OI.v2 SST data begins in November 1981, it does not seem appropriate to use a 28-year trend on a cycle that lasts about 60 years, so I am NOT presenting the AMO.

Using North Atlantic SST anomalies as a reference, the AMO is still rising from its low this year in February. Scroll down for the North Atlantic SST anomalies.

NOTE ABOUT THE DATA

The MONTHLY graphs illustrate raw monthly OI.v2 SST anomaly data from November 1981 to July 2009.

MONTHLY INDIVIDUAL OCEAN AND HEMISPHERIC SST UPDATES
http://i27.tinypic.com/34euuy0.png
Northern Hemisphere
Monthly Change = +0.042 deg C
#####
http://i26.tinypic.com/358oqkk.png
Southern Hemisphere
Monthly Change = -0.049 deg C
#####
http://i25.tinypic.com/rtovu1.png
North Atlantic (0 to 75N, 78W to 10E)
Monthly Change = +0.147 deg C
#####
http://i27.tinypic.com/sbpyy0.png
South Atlantic (0 to 60S, 70W to 20E)
Monthly Change = +0.009 deg C
#####
http://i26.tinypic.com/1oozmh.png
North Pacific (0 to 65N, 100 to 270E, where 270E=90W)
Monthly Change = +0.001 Deg C
#####
http://i25.tinypic.com/f2slck.png
South Pacific (0 to 60S, 145 to 290E, where 290E=70W)
Monthly Change = -0.006 deg C
#####
http://i29.tinypic.com/2r5yfk3.png
Indian Ocean (30N to 60S, 20 to 145E)
Monthly Change = -0.080 deg C
#####
http://i31.tinypic.com/nv8l8k.png
Arctic Ocean (65 to 90N)
Monthly Change = +0.026 deg C
#####
http://i29.tinypic.com/9ubsec.png
Southern Ocean (60 to 90S)
Monthly Change = +0.033 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 +0.77 deg C.
http://i29.tinypic.com/2w6vrk3.png
Weekly NINO3.4 (5S-5N, 170W-120W)

SOURCE

The Optimally Interpolated Sea Surface Temperature Data (OISST) are available through the NOAA National Operational Model Archive & Distribution System (NOMADS).
http://nomad3.ncep.noaa.gov/cgi-bin/pdisp_sst.sh?lite

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About Bob Tisdale

Research interest: the long-term aftereffects of El Niño and La Nina events on global sea surface temperature and ocean heat content. Author of the ebook Who Turned on the Heat? and regular contributor at WattsUpWithThat.
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