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  • Actinic fluxes were measured using the BAS spectroradiometer, between 7 January 2005 and 10 February 2005. Measurements taken mostly relate to down-welling flux, but the spectroradiometer was periodically inverted to record up-welling flux. This work was carried out at the Clean Air Sector Laboratory (CASLab) at Halley Station, Antarctica, as part of the Chemistry of the Antarctic Boundary Layer and the Interface with Snow (CHABLIS) project (2001-2006). The dataset provides ratios given as j-values for jO1D, nitrogen dioxide (jNO2) and nitrous acid (jHONO), at approximate one-minute intervals.

  • Two model runs using the BAS Radiation belt model; one using a low energy boundary condition set from POES data, another using a low energy boundary condition from Van Allen Probes MagEIS data. The outer boundary condition and inner boundary have been set by Van Allen Probes data for both runs. The electron flux for an equatorial pitch angle of 90 degrees is supplied for 0.9 MeV electrons. Both runs cover a period from the 3rd - 28th June 2013. Funding was provided by the NERC grant NE/L002507/1.

  • Dataset consists of measurements of hydroxyl (OH), hydroperoxyl (HO2), using FAGE (Fluorescence Assay by Gas Expansion) and radiometer measurements of ozone photolysis frequencies. This work was carried out between Jan and Oct 2005 at Halley Station, as part of the Chemistry of the Antarctic Boundary Layer and the Interface with Snow (CHABLIS) project (2001-2006).