TY - T1 - Low hygroscopic scattering enhancement of boreal aerosol and the implications for a columnar optical closure study SN - / UR - http://hdl.handle.net/10138/161731 T3 - A1 - Zieger, P.; Aalto, P. P.; Aaltonen, V.; Aijala, M.; Backman, John; Hong, J.; Komppula, M.; Krejci, R.; Laborde, M.; Lampilahti, J.; de Leeuw, G.; Pfuller, A.; Rosati, B.; Tesche, M.; Tunved, P.; Väänänen, R.; Petaja, T. A2 - PB - Y1 - 2015 LA - eng AB - Ambient aerosol particles can take up water and thus change their optical properties depending on the hygroscopicity and the relative humidity (RH) of the surrounding air. Knowledge of the hygroscopicity effect is of crucial importance for radiative forcing calculations and is also needed for the comparison or validation of remote sensing or model results with in situ measurements. Specifically, particle light scattering depends on RH and can be described by the scattering enhancement factor f(R... VO - IS - SP - OP - KW - ALPINE SITE JUNGFRAUJOCH; LIGHT-SCATTERING; RELATIVE-HUMIDITY; ATMOSPHERIC AEROSOL; LIDAR MEASUREMENTS; MASS-SPECTROMETER; DRY DEPOSITION; IN-SITU; AIRBORNE MEASUREMENTS; SEA-SALT; 114 Physical sciences N1 - PP - ER -