Climate is not constant: records over the last two centuries have shown that both long-term trends and short-term perturbations in climate can occur. There is concern that human activities may be inadvertently changing the earth's climate through an enhanced greenhouse effect. The local impact of these global changes in climate is not yet known. The Meteorology protocol consists of two differing approaches: - Automatic Weather Stations (13 variables summarised hourly) - Standard Meteorological Observations measured manually (14 variables measured daily at 0900 GMT)