“…The BC mass concentration is calculated from the rate of change of attenuation of light from an LED source used in the instrument. More details of the experimental station, description of the Aethalometer and accuracies involved in the estimation of BC data are available elsewhere [ [19] , [20] , [21] , [22] ]. The density of BC datasets that have gone into the different parameter evaluation and model calculations are presented in Table 1 .…”