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

  • (no image provided)

    Trawl fisheries bycatch

    Accurate reporting on the amount of fish and invertebrates that are caught and discarded by New Zealand’s commercial fishing industry is vital to effective management of these fisheries.
  • (no image provided)

    Station details

    Station height is in metres above mean sea level. Years of data are the number of complete years of data for the 1981 – 2010 period.
  • (no image provided)

    Map Alpine

    Education Resource
    Mountainous areas are subject to heavy snowfalls, high winds, and low temperatures. Semi-permanent snow and ice fields exist at about 1000-1100 metres during winter.
  • (no image provided)

    Tuna - elvers and recruitment

    Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.
  • (no image provided)

    What do 'carbon neutral' and 'carbon footprint' mean?

    A carbon neutral activity is one that has a carbon footprint of zero.
  • (no image provided)

    Tuna

    Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.
  • 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.
  • Landscape

    On-Site Household Sanitation Guidelines for Fiji

    Research Project
    A participatory project empowering communities with self-help tools to improve water, sanitation and hygiene.
  • Chemical contamination and agriculture

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

    In comparison with regions exposed to the west, Gisborne experiences a greater number of weather and climatic extremes.
  • (no image provided)

    Water clarity

    Water clarity or turbidity is the cloudiness or haziness in a fluid caused by individual small particles (suspended solids).
  • Impacts of hydro

    Impacts of hydro-electric activities on water quality and mahinga kai.