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.

  • Loss of riparian vegetation

    Plants and trees along the water margins and banks are called riparian vegetation.
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    Tuna - elvers and recruitment

    Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.
  • 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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    What do 'carbon neutral' and 'carbon footprint' mean?

    A carbon neutral activity is one that has a carbon footprint of zero.
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    Mean daily maximum temperatures (°C)

    These datasets are available in a range of formats.
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    Hotspot Watch Updates

    This weekly update helps assess likelihood of extremely dry weather preceding a drought.
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    New Zealand rushes (Juncus): factsheets and key

    New Zealand rushes (Juncus): species-level factsheets.
  • UV Index at Leigh - 16 October 2023

    Yesterday's UV Index

    Plots of UV levels throughout the day at different locations.
  • Chemical contamination and agriculture

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

    A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.
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    Map Scott

    Education Resource
    Scott Base, Antarctica Antarctica is the coldest, windiest and driest continent.
  • Bay of Plenty

    The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.