-
Atmospheric ozone, ultraviolet radiation, and stratospheric change
Research ProjectCFCs have damaged the ozone layer and led to higher UV levels and increased health risks. Our role is to understand the causes and effects of ozone depletion, to inform the public of the risk. -
Trace gas datasets
ServiceNIWA makes a range of trace gas data freely available on our FTP site. -
UVI forecast for Specific Sites
Check out UV index forecasts for locations in New Zealand (including ski fields), Australia, the Pacific and Antarctica. -
What is the greenhouse effect?
Education ResourceThe greenhouse effect is a warming of the earth's surface and lower atmosphere caused by substances which let the sun's energy through to the ground but impede the passage of energy from the earth back into space. -
Publicly available data and publications
FacilityNIWA makes available and regularly updates results from several greenhouse gas measurement projects. -
Carbon dioxide
FacilityAtmospheric carbon dioxide (CO2) is measured continuously at Baring Head, providing the longest running record of this type in the Southern hemisphere. -
UV Index Information
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.
