Planetary boundary layer height measurements in a rural environment in southern Sweden - Relation to meteorological parameters and aerosol particle concentrations

Sammanfattning: The aim of this project is to analyse planetary boundary layer height (BLH) measurements from the Hyltemossa research station and find their dependence on seasonality, time of day, and air temperature. Further, investigation was made into the correlation between mass concentration of particulate matter with equivalent diameter<1μm (PM1) and black carbon (BC) aerosol and the BLH and how this varies between seasons and wind directions. Measurements of BLH were made using a VAISALA CL51 ceilometer. It was found that there is a clear diurnal variation of BLH in all seasons but winter and that the BLH is dependent on temperature in summer. Moreover, anti-correlation between BLH and both BC and PM1 were found in winter and fall and the correlation with PM1 was stronger when southerly winds prevailed than when northerly winds prevailed.