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.

  • (no image provided)

    Mean relative humidity

    Dataset available for download
  • Analysis of water quality trends

    NIWA has developed a powerful software tool for the analysis of water quality data.
  • (no image provided)

    Software tools

    NIWA develops and supplies custom software for environmental analysis and modelling.
  • Scientists explore deepest parts of the Kermadec Trench

    Media release
    Scientists exploring the Kermadec Trench believe they have retrieved the deepest ever sediment sample from the bottom of the ocean using a wire-deployed corer.
  • (no image provided)

    Map North

    Education Resource
    This is a sub-tropical climate zone, with warm humid summers and mild winters.
  • (no image provided)

    Tuna - glass eels

    Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.
  • (no image provided)

    Hotspot Watch Updates

    This weekly update helps assess likelihood of extremely dry weather preceding a drought.
  • Juncus banner

    New Zealand rushes (Juncus): factsheets and key

    New Zealand rushes (Juncus): species-level factsheets.
  • Resources for teachers

    NIWA's educational resources and scientific data are tools for young people to learn about science.
  • When fresh water meets salty water

    When fresh water meets salty water - a classroom exercise that explores the physics of estuaries.
  • Chemical contamination and agriculture

    What are the potential sources of chemical contamination from agricultural activities?