Story: Climate

Interdecadal Pacific Oscillation, 1920–2000

Interdecadal Pacific Oscillation, 1920–2000

The Interdecadal Pacific Oscillation (IPO) is a natural variability in climate, including sea temperature, over decades. This graph shows the variations in the index derived from global sea surface temperatures. New Zealand experienced significant climate cooling in 1950 and again in 1977, after which the pattern shifted to a warmer phase.

Using this item

Te Ara - The Encyclopedia of New Zealand

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

Source: NIWA – National Institute of Water and Atmospheric Research, from data supplied by the UK Met Office

All images & media in this story

How to cite this page:

Brett Mullan, Andrew Tait and Craig Thompson, 'Climate - New Zealand and global climate patterns', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/diagram/7788/interdecadal-pacific-oscillation-1920-2000 (accessed 6 December 2019)

Story by Brett Mullan, Andrew Tait and Craig Thompson, published 12 Jun 2006