Atmospheric analysis

Returning water to our waterways after we’ve used it in our homes, on farms and in industry is a complex and challenging process.

The UV Index is a measure of the intensity of UV radiation. The larger the number, the more intense the UV. In New Zealand, its maximum summer value is generally about 12, but it can exceed 13 in the far North. In winter it reaches peak values of 1 or 2. Values of 10 or more should be considered as "extreme". At high altitude tropical sites (eg Mauna Loa Observatory, Hawaii), the UV Index can exceed 20.The UV Index supersedes the idea of "Time to Burn" or "Burn Time", which has been used previously in New Zealand.

Maps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010.

The land used to produce crops is usually flat to gently rolling so it can be tilled, sowed, and harvested.

New Zealand rushes (Juncus): species-level factsheets.

How may forestry activities increase sediments in waterways?

Plants and trees along the water margins and banks are called riparian vegetation.

To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.

If you're moving to join us here at NIWA, we want to say thanks for choosing us by helping you with your big move.

Tsunami is a Japanese word meaning great wave in harbour.

NIWA is leading a new six-year research project that seeks to increase our understanding of piharau/kanakana/lamprey, using Mātauranga Māori, social science and biophysical science approaches.