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.

  • Huka Falls

    Our mission

    NIWA's mission is to conduct leading environmental science to enable the sustainable management of natural resources for New Zealand and the planet.
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    Mean monthly temperatures (°C)

    These datasets are available in a range of formats.
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    Tuna - spawning grounds

    All species of freshwater tuna spawn at sea, although the spawning grounds of only four species are known with certainty worldwide.
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    Canterbury

  • SHMAK water quality – visual clarity

    There are two methods to determine visual clarity in SHMAK; the clarity tube (or SHMAK tube) and the black disc method.
  • Assessment of crop and tree species growing potential using climate, soil and topographic information

    Research Project
    This project demonstrates how to assess high value alternative land-use options by means of a quantitative analysis of the growing potential of selected niche crops and tree species.
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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.
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    What do we measure?

    Research Project
    A range of physical and chemical variables are measured in the NRWQN.
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    Definitions of drought

    There are several definitions of drought, depending upon whether it is viewed as a hazard or a risk.
  • Mitigation and best practice options

    Here are some simple steps to minimise the effects of dairying on water quality and mahinga kai.