RV Tangaroa is New Zealand’s only ice strengthened and dynamically positioned deep-water research vessel.

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

Each waterway has its own particular characteristics relating to water flow, velocity, and quantity.

These datasets are available in a range of formats.

NIWA has developed a powerful software tool for the analysis of water quality data.

The Standardised Precipitation Index (SPI) is a simple measure of drought (and also of very wet conditions) and is based solely on the accumulated precipitation for a given time period.

NIWA develops and supplies custom software for environmental analysis and modelling.

This is a sub-tropical climate zone, with warm humid summers and mild winters.

Submerged plants have a number of advantages that favour their use as indicators of lake ecological condition.

A regional climatology is a summary of the typical weather and climate of a region, based on historical data observations made at climate stations located within the region.

A monthly summary of the climate in the tropical South Pacific islands, with an outlook for the coming months.