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Global Setting – April 2012

8 May 2012

Neutral conditions prevail in the tropical Pacific (no La Niña or El Niño), after the end of the 2011/12 La Niña event. Near New Zealand, lower than normal pressures are expected to the north of the country, with higher than normal pressures over southern New Zealand. 

Sea surface temperatures

Sea temperatures around New Zealand are likely to remain near normal or slightly cooler than normal during early winter.

Differences from average global sea surface temperatures for 8th April to 5th May 2012. Map courtesy of NOAA Climate Diagnostics Centre (http://www.cdc.noaa.gov/map/images/sst/sst.anom.month.gif).
Monthly values of the Southern Oscillation Index (SOI), a measure of changes in atmospheric pressures across the Pacific, and the 3-month mean (black line). SOI mean values: April SOI -0.8; February to April average -0.2.
Differences from normal April surface temperatures in the seas around New Zealand.

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