Christiaan van der Tol
![https://people.utwente.nl/c.vandertol/picture.jpg">](https://people.utwente.nl/c.vandertol/picture.jpg">){kind=link}
ET is the water lost to the atmosphere through plant stomata during photosynthesis and from the surfa
Daily totals or daily averages are convenient to work with and provide a first, rough impression of the wea
Farmers want to use less water to produce more food.
In many countries, shortage of drinking water is a problem.
Understanding of the effect of climate change on ecosystems is of great importance.
Farmers, agronomists, private enterprise and policy-makers need to know field conditions with sufficient early-warning.
The rate of carbon uptake by vegetation is not fully known.
The concept of nature conservation as well as ecosystem sustainability has received substantial attention of the human society, such is even more so recently given the dire IPCC warning about the a