Most of the changes occur in the atmosphere close to the surface because of changes in surface temperature, but there can also be chemical changes in the middle atmosphere and of course electrical changes in the upper atmosphere. Automatic measurements of temperature and solar radiation were made at the Department of Meteorology's field site, taken at 1Hz, with the five minute average values shown below. The Field Site Pages have been accessed a total of 157217 times since this date. Andrew Lomas and Giles Harrison maintain the field site data logging system. Morwenna Griffiths created the graphical pages which are maintained by Sheila Bryant .
More information is available on the system and how to obtain the data directly.
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