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.

  • Publicly available data and publications

    Facility
    NIWA makes available and regularly updates results from several greenhouse gas measurement projects.
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    Mean relative humidity

    You can download these summaries in a range of formats.
  • New Zealand Palaeotsunami Database

    Software Tool/Resource
    The New Zealand Palaeotsunami Database (Database) brings together all known information about tsunamis that occurred prior to written records.
  • Analysis of water quality trends

    NIWA has developed a powerful software tool for the analysis of water quality data.
  • Flood waters receding after days of heavy rain across the area.

    Flooding - how does it happen?

    Education Resource
    Understanding what happens above and below ground during a flooding event, and how it is different from normal rainfall conditions
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    Software tools

    NIWA develops and supplies custom software for environmental analysis and modelling.
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    Map North

    Education Resource
    This is a sub-tropical climate zone, with warm humid summers and mild winters.
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    Mitigation and best practice options

    Some simple steps to minimise the effects of aquaculture activities on water quality and mahinga kai.
  • Southwest Pacific climate

    Our southwest Pacific research focuses on recent and historic climate and weather activity, including our involvement in ACRE Pacific data rescue.
  • Resources for teachers

    NIWA's educational resources and scientific data are tools for young people to learn about science.
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    Tuna - tuna heke (downstream migrants)

    Once eels become migrants (also known as tuna heke or tuna whakaheke) they stop feeding, and progressively develop the external features that clearly distinguish them from 'feeders'.