under a Creative Commons License. Atmospheric Chemistry and Physics Changes in aerosol properties during spring-summer period in the Arctic troposphere

• Main Authors: A. -c. Engvall, R. Krejci, J. Ström, R. Treffeisen, R. Scheele, O. Hermansen, J. Paatero
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2008
• Subjects: Aitken; Arctic; Svalbard
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.389.1743; http://hal.archives-ouvertes.fr/docs/00/29/64/27/PDF/acp-8-445-2008.pdf

Abstract. The change in aerosol properties during the transition from the more polluted spring to the clean summer in the Arctic troposphere was studied. A six-year data set of observations from Ny- ˚Alesund on Svalbard, covering the months April through June, serve as the basis for the characterisation of this time period. In addition four-day-back trajectories were used to describe air mass histories. The observed transition in aerosol properties from an accumulationmode dominated distribution to an Aitken-mode dominated distribution is discussed with respect to long-range transport and influences from natural and anthropogenic sources of aerosols and pertinent trace gases. Our study shows that the air-mass transport is an important factor modulating the physical and chemical properties observed. However, the airmass transport cannot alone explain the annually repeated