Environmental Research & Control
Published by Environmental Management Center, Okayama University

<Formerly known as>
岡山大学環境管理センター報 (4号-11号) 岡山大学環境管理施設報 (1号-3号)

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中部山岳地域における積雪中の非溶解性微粒子の地域分布

遠山 和大 岡山大学学務部
松本 絵菜 富山大学理学部
川田 邦夫 富山大学極東地域研究センター
佐竹 洋 富山大学理工学研究部
抄録
The vertical snow samples collected from 6 locations (Iou-zen: 800m A.M.S.L; the nearest site from the Sea of Japan, Kongoudou-zan: 1300m, Nishi-Hodaka-Dake: 2200m; the Northern Japan Alps, Hachimori-yama: 2100m, Kiriga-mine: 2000m, Yatsuga-take: 2200m; the most inlying site) in the central mountainous area, Japan, during early spring season 2004, were analyzed for size-separated concentrations of water-insoluble particles in snow layers to investigation of long-range transportation of chemical substances from the Asian continent to high mountainous areas in Japan. Most of particles are less than 30 μm in diameter, the greater part of particles observed at the 6 locations were considered to be transported from the Asian continent sources as Asian dust (KOSA). The variation patterns of the vertical profiles of particle concentrations in snow layers were corresponding among each location. The concentrations of particles with less than 30 μm was gradually increased with increasing distance from the Sea of Japan to the Japan Alps, although, sharply-decreased at 3 sites located the monsoon-leeward of the Japan Alps, suggesting that the particles transported with monsoon were gradually removed from air and deposited in snow cover when the air parcel pass through the Japan Alps.
キーワード
snow
mountainous area
particle
KOSA
long-range transportation
ISSN
0917-1533
NCID
AN1024789X