Atmospheric analysis

NIWA has been using advanced scientific instruments to measure atmospheric trace gases and isotopes for over 50 years.

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    Alice: an Instrumented Tripod

    Alice is an instrument package for measuring bottom-boundary-layer processes in estuaries and the ocean. It consists of a self-ballasted tripod upon which is mounted a "core" sensor package for measuring boundary-layer currents, turbulence and waves. Alice is principally rigged for sediment-transport studies (with optical and acoustic backscatter sensors, sediment traps and a pump sampler) but has also been used extensively in studies of boundary-layer mechanics, animal–flow–sediment interactions, wave dynamics and nutrient/gas fluxes.
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    Benthic Ecology Video Information System

    BEVIS has been developed for rapid, cost-effective seafloor habitat surveys. Sled-borne cameras are monitored and controlled from the surface, affording investigation at depths where using divers to collect video data or macrobenthic cores would be impractical or impossible. 
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    Computerised Research Echo Sounder Technology (CREST)

    Our Computerised Research Echo Sounder Technology (CREST) is a highly adaptable approach to fisheries and other acoustic data acquisition.
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    Flow Cytometer

    NIWA's Becton Dickinson FACSCalibur flow cytometer supports a wide range of research and commercial applications.
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    Estuaries publications

    Where an online version is not available, a PDF is provided. Use your browser’s Back button to return to this page.
    Bell, R.; Green, M.; Hume, T.; Gorman, R. (2000). What regulates sedimentation in estuaries? Water & Atmosphere 8(4): 13–16.
    Davies-Colley, R.; Nagels, J.; Donnison, A.; Muirhead, R. (2004). Flood flushing of bugs in agricultural streams. Water & Atmosphere 12(2): 18–20.
    Green, M. (2003.) The dance of the turbid fringe. Water & Atmosphere 11(2): 20–21.
    Green, M.; Ellis, J.; Schwarz, A.-M.; Lind, D.; Bluck, B. (2003).
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    Resource Management Act

    The Resource Management Act 1991 (RMA) dictates how we are to manage our physical environment, including the coast and estuaries.
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    Models

    A model is a representation of a “real thing”. Usually, the model is simpler in some or many ways than the real thing; the model simulates the behaviour of the real thing; and the model can be used to predict the future behaviour of the real thing.
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    Monitoring

    Monitoring is often an expensive exercise, but it does not have to be.
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    What now?

    Estuaries are more than just the mudflats that we cross on the way to the beach. Of course they have intrinsic value – what natural environment doesn’t? – but they also provide us humans with a range of ecological services that help to sustain the quality of our environment, and with amenities that we all enjoy, and sometimes profit from.
  • NZ estuaries

    Over the past decade, NIWA has published many popular articles that deal with estuaries - this overview is intended to bring together and make whole sense of the information published to date in the various popular articles.
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    The life of an estuary

    An estuary is a semi-enclosed embayment, with a free connection to the sea at one end and a freshwater supply at the other, and within which fresh and salty waters mix.
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    Salmonidae

    Salmon, Trout and Char (Salmonidae) The Salmonidae family is native to the Northern Hemisphere, but several species have been introduced to New Zealand. Some of these species, particularly brown and rainbow trout, have established very successfully here and support New Zealand’s reputation as an angling Eldorado.