On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Atmospheric analysis

NIWA has been using advanced scientific instruments to measure atmospheric trace gases and isotopes for over 50 years.

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    Just how windy can it get in Wellington?

    News article
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    Review

    NIWA's work on long-term temperature trends has been subject to various review processes.
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    Technical note on addition of early Nelson climate records

    Temperature measurements for the Nile St Vicarage in Nelson have now been digitised.
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    Technical note on Hokitika station agent numbers

    Hokitika temperature data used in the NIWA seven-station temperature series have now been split into two stations
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    Technical note on addition of data for Kelburn, December 1927

    Temperature data for December 1927 at Kelburn have been added to the NIWA Climate Database
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    Technical note on correction of value for Waingawa, April 1910

    An incorrect value of monthly mean temperature for Waingawa for April 1910
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    Technical notes on seven-station temperature series data

    Technical changes relating to data in the seven-station temperature series
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    References

    Reference articles about the seven-series temperature records
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    Adjustments

    Links to extensive documentation for each of the 'seven stations'
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    'Seven-station' series temperature data (archive)

    NZ ‘seven-station’ temperature series data for download