Lake confetti: Lake colour as seen from space 

A team of LERNZ researchers led by Dr. Moritz Lehmann has published the first comprehensive assessment of lake water colour in New Zealand based on four years of satellite observations. The researchers found that New Zealand's lakes span close to the full global range of possible water colours; some lakes have a stable blue or yellow colour, while others show very strong variability related to seasonal and episodic events which may be driven by agriculture, forestry, invasive species and climate change. Further details can be found in the full press release, the LERNZ web page or the freely accessable journal article.


Monthly composite of the colour of 1486 lakes determined from satellite images. The colour is expressed as dominant wavelength, an intensification of the colour as perceived by the human eye.


Takiwa Lakes

Takiwa is a  'geospatial database' for storing lake data in a visual format based on its location, it integrates comprehensive national environmental databases, routine and high-frequency data, and 'big data' from other sensors, into a single platform. 

Takiwa has been set up to provide a scalable and persistent visualization database to benefit a diverse range of stakeholders throughout New Zealand. One of the central tenets of Takiwa is to make data fully open and accessible through the remaining duration of the LERNZ programme, until 2019. The ability to continue Takiwa beyond this time will depend on 'buy in' from stakeholders depending on their perceptions of the usefulness of the platform as a freshwater data repository and visualization tool. Takiwa Lakes is free to use following registration here.