Meteorological data was first collected in Brooms Barn in 1963, though only data from 1982 is currently available in e-RA. Fewer variables are measured than at Rothamsted and Woburn. Most manual observations ceased in 1996, and meteorological records are now measured by a range of sensors attached to an automatic data logger. Between August 2009 and May 2012 the weather station was not fully functional, and raw data supplied by the Brooms Barn Met Office weather station was used for some variables. Hourly data from 2016 (radiation from 2003) are available from the e-RA Curators.
The Brooms Barn meteorological station is approx. 30m from the main buildings, which are approx. 10m high. This may cause some interference with the measurement of wind speed and wind direction, as ideally a mast with wind sensors should be a minimum of 10 times the height of the nearest building away from the nearest building (ie at least 100m apart). This gives enough fetch for the wind to settle down. The met station and main building have always been in these positions.
Mean annual temperature 1964-2008 was 9.9 °C. Rainfall averages 612mm (1963-2008).
Real-time hourly, daily and yearly weather charts for Brooms Barn are available on-line over 28 days or 365 days (rolling) via the Rothamsted Environmental Change Network (ECN) pages
For further information and assistance, please contact the e-RA curators, Sarah Perryman and Margaret Glendining using the e-RA email address: era@rothamsted.ac.uk