Corrections to a description of turbulence in a trafficked street canyon in Manchester

A paper previously published in Atmospheric Environment (Longley et al. (Atmos. Environ 38 (2004) 69) contained a model describing turbulence data measured in the field. Subsequent re-analysis of the data has uncovered fundamental and irreparable errors in the raw data from one anemometer. This dataset covered measurements by a mobile anemometer at a height of 2 m above a road surface within a street canyon. Some key conclusions concerning the influence of traffic upon turbulence were dependent upon this dataset and are no longer valid. New data has been captured from the original street canyon to correct and replace this erroneous data. This new data indicates that the weak positive gradient in turbulent intensity higher in the canyon described in the original paper is consistent down to 2 m and that the sharp enhancement at this height originally reported was not observed in the replacement data.