Atmospheric analysis

The 2012-2013 drought affected the entire North Island plus the west coast of the South Island.

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.

We have prepared a breakdown of the different guidelines that are available for sampling freshwater fisheries. The overview provides links to key documents that explain what should be considered when designing fish monitoring studies and how to implement the various sampling techniques.

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.

An interactive guide to the sponges of New Zealand.

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

NIWA's seafood sector work comprises our fish, fisheries and aquaculture research and consultancy.

The world’s oceans are acidifying as a result of the carbon dioxide (CO2) generated by humanity.

This identification guide covers the common crustose coralline algae found in central New Zealand.

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

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

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere.