In uk.sci.weather on Sun, 3 Jun 2007, Bernard Burton
wrote :

Paul,
There is a daily graph of minute by minute depression of grass min below air
min at Wokingham on this page:
http://www.woksat.info/wwp6.html
Scroll down the page and you will see a list of daily Graphs. Scroll down
that page and you will see a graph of grass level temp and grass-air
difference. The difference trace is grey, and is on the right hand scale.

Thanks - very interesting.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)