Atmospheric analysis

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

NIWA expends considerable effort on determining the age of commercial fish species. But why age a fish? And how do we do it?

Smelt have a distinctly forked tail and a strong cucumber smell.

These datasets are available in a range of formats.

What are the impacts of water dams on water quality and mahinga kai?

Hull-mounted on the RV Tangaroa, the EM302 multibeam echosounder maps the seafloor using a fan of 288 acoustic beams, producing up to 864 soundings per ping in dual swath mode, providing 100% coverage of the seabed.

River floods occur when water spills from a river channel onto land that is normally dry, and are one of New Zealand's costliest natural hazards.

Shellfish gathering and farming take place in marine and freshwater environments.

Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

Because of its exposure to disturbed weather systems from the Tasman Sea, this climate zone is often quite windy, but has few climate extremes.

NIWA maintains the national climate database for New Zealand, and can supply data in a variety of ways.