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.

  • Hydro

    Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam.
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    Mean daily maximum temperatures (°C)

    These datasets are available in a range of formats.
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    Mussels: more, fresher, better

    Feature story
    The seafood counter at your local supermarket has changed.
  • UV Index at Leigh - 16 October 2023

    Yesterday's UV Index

    Plots of UV levels throughout the day at different locations.
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    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.
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    Piharau

    Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori.
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    Invertebrates and stream health

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    Map South

    Education Resource
    Most of this climate zone is characterised by cool coastal breezes, and absence of shelter from the unsettled weather that moves over the sea from the south and southwest.
  • Deidre Cleland

    Scholarships

    Scholarships available to both Masters and undergraduate students in the fields of fisheries science and marine biology.
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    What do we measure?

    Research Project
    A range of physical and chemical variables are measured in the NRWQN.
  • Daily climate maps

    These climate maps are updated daily and are based on data from our National Climate Database.
  • 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.