Environmental Modeling & Assessment

, Volume 20, Issue 4, pp 399–410 | Cite as

A Reanalysis of Long-Term Surface Air Temperature Trends in New Zealand

  • C. R. de FreitasEmail author
  • M. O. Dedekind
  • B. E. Brill


Detecting trends in climate is important in assessments of global change based on regional long-term data. Equally important is the reliability of the results that are widely used as a major input for a large number of societal design and planning purposes. New Zealand provides a rare long temperature time series in the Southern Hemisphere, and it is one of the longest continuous climate series available in the Southern Hemisphere Pacific. It is therefore important that this temperature dataset meets the highest quality control standards. New Zealand’s national record for the period 1909 to 2009 is analysed and the data homogenized. Current New Zealand century-long climatology based on 1981 methods produces a trend of 0.91 °C per century. Our analysis, which uses updated measurement techniques and corrects for shelter-contaminated data, produces a trend of 0.28 °C per century.


Data quality control Climate change Temperature time series New Zealand 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • C. R. de Freitas
    • 1
    Email author
  • M. O. Dedekind
    • 2
  • B. E. Brill
    • 3
  1. 1.School of EnvironmentUniversity of AucklandAucklandNew Zealand
  2. 2.Research & Development, BCD ConsultingAucklandNew Zealand
  3. 3.PaihiaNew Zealand

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