MEASUREMENTS OF THE NUMBER CONCENTRATION OF AEROSOL PARTICLES IN NORTHERN NORWAY

• Main Authors: タニグチ タカシ, キクチ カツヒロ, Takashi TANIGUCHI, Katsuhiro KIKUCHI
• Format: Report
• Language: English
• Published: ABSTRACT 1991
• Subjects: Arctic; Midwinter; Norway; Norwegian Sea; Northern Norway; Polar meteorology and glaciology; Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3659; http://id.nii.ac.jp/1291/00003659/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3659&item_no=1&attribute_id=18&file_no=1

The number concentrations of aerosol particles in five size ranges were measured continuously using a particle counter (Rion, KC-01B) in Arctic Norway for one month in midwinter in 1987/1988. Samples of aerosol particles were collected on filter paper, and the chemical composition of each particle was analyzed with a scanning electron microscope and an energy dispersive X-ray microanalyzer. In order to estimate the origin of aerosol particles, back trajectories of air parcels which arrived at the observation site were determined on 850mb charts. They were well correlated with the time changes of the number concentration of aerosol particles and also with the chemical composition of each particle. In the cases when the aerosol particles seemed from trajectories to travel around with a slowly moving low pressure over the Norwegian Sea, the number concentration indicated low values for several days, and the chemical constituents of most particles were of marine origin, namely Na and Cl. Around the observation site the prevailing wind direction was from the southwest. The number concentrations for these cases indicated medium values with slight variation. The aerosol particles contained some soil elements although the primary elements were of marine origin. On some days, aerosol particles derived from trajectories which passed over industrial areas in Europe arrived at the observation site. In this case the number concentration indicated high values, and the anthropogenic elements such as sulphate were detected frequently in aerosol particles.