Mean annual temperature for New Zealand, calculated from NIWA’s ‘seven-station’ series. This series uses climate data from seven geographically representative locations. The data are adjusted to take account of factors such as different measurement sites. The blue and red bars show the difference from the 1971-2000 average. The black dotted line is the linear trend over 1909 to 2009 (0.9°C/100 years).

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