Biologically-relevant radiation has been recorded since February 1997 using a Bentham spectroradiometer at Rothera. The Bentham spectroradiometer is sited on the roof of the Bonner Laboratory at Rothera. It measures spectral global irradiance between 280 and 600 nm (wavelengths from below UV-B to the middle of the visible range) with a step size of 0.5 nm and a resolution of 1 nm. Scans are ... recorded at various time intervals depending on the time of day and season peaking at every 30 minutes while the sun is above the horizon from the beginning of September until the end of April. These scans can be used to measure the amount of solar radiation reaching the earth''s surface at Rothera. It provides particularly useful background data for studies on the effects of increased UV-B, due to the ozone hole, on the plants and microbes in regions around Rothera. Data is managed in the Biological Science Data and Resource Centre. The Data is stored in an Oracle database.
Data are stored in four pairs of Oracle tables. One member of each pair holds the spectral data while the other member holds all the meta-data concerned with each scan. The four pairs hold reference data (calibration lamp irradiance values, action spectra, spectral response functions etc.), wavelength calibration data, irradiance calibration data and measurements of spectral irradiance. The tables are owned by u_hp and are called: spec_ref_data, spec_ref_info, spec_wlcal_data,spec_wlcal_info, spec_ircal_data, spec_ircal_info, spec_measurements, spec_measurements_info. In August 2001 the spectroradiometer was destroyed by a laboratory fire. A new instrument was installed in February 2003. These data are stored in the oracle tables new_spec_wlcal_data, new_spec_wlcal_info, new_spec_ircal_data, new_spec_ircal_info, new_spec_measurements, new_spec_measurements_info. As the exact day of the data collection was not provided, and the metadata standard requires a YYYY-MM-DD for
mat, this dataset has been dated as 1st February.