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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    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

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    Changes

    This is a record of changes made to the section of NIWA's website relating to our analysis of New Zealand temperature trends.

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    Mitigation

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    Mitigation

    Some options to minimise the effects of dams on water quality and mahinga kai.

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    Mitigation

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    Impacts of wind

    How do wind energy generation activities impact water quality and mahinga kai?

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    Impacts of geothermal

    How does geothermal energy generation impact water quality and mahinga kai?

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    Mitigation

    Steps to minimise the effects of thermal energy generation on water quality and mahinga kai.