Atmospheric analysis

A range of physical and chemical variables are measured in the NRWQN.

There are two methods to determine visual clarity in SHMAK; the clarity tube (or SHMAK tube) and the black disc method.

Identifying biological factors that may be limiting fish numbers requires sampling to ensure that key invertebrate prey species are not scarce and that pest fish, especially predators, are not abundant.

Aotearoa’s main urban areas cover approximately 2% of total available land.

Explore our education and information section to find out about climate and climate change, weather, our atmosphere, estuaries and more.

Southland is both the most southerly and most westerly part of New Zealand and generally is the first to be influenced by weather systems moving onto the country from the west or south.

Here is our complete range of products.

The sex of tuna is not determined genetically, as in some other organisms.

NIWA provides national capabilities in Water Quality Monitoring.

Methane (CH4) is the second most important greenhouse gas after CO2 that is produced by human activities.