昭和基地の降雪および飛雪の化学組成(1985)

• Main Author: 村山 治太
• Format: Report
• Language: Japanese
• Published: 1989
• Subjects: East Antarctica; Syowa Station; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10131/3576; https://ynu.repo.nii.ac.jp/?action=repository_uri&item_id=1475; https://ynu.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1475&item_no=1&attribute_id=20&file_no=1

南極・昭和基地で越冬し,地吹雪(ブリザード)がおさまる毎に,風によって運ばれてきた雪を集めた。1985年2月から12月までの間に29試料が得られた。日本に持ち帰り,主成分6種(ナトリウム・カリウム・カルシウム・マグネシウム・塩化物イオン・硫酸イオン)を測定した。主成分の組成を海水の組成と比較するために,塩化物イオンを基準にして海水からの濃縮係数を求めたところ,大部分が0.8～1.2の範囲におさまり,降雪および飛雪に含まれる6成分の組成比は海水の組成比とほぼ同じであることが結論された。含まれていた塩の濃度を塩化物イオンで示すと,最大値は1.92g/l(5月7日採取),最小値は1.9mg/l(3月4日採取)であった。 29 kinds of snow drift and deposited snow samples were collected in 1985 near Syowa Station, East Antarctica. Samples were taken every end of a blizzard. pH and electroconductivity were measured at the Syowa Station after melting snow samples. And then, those samples were packed in polyethylene bottles and re-freezed. Most of the chemical analysis was conducted at the laboratory of our Department after were carried back the samples in frozen state, employing general and conventional analytical methods. Chemical components of those snow samples varied considerably, ranging from 1.9mg/l to 1.92g/l on the chloride ion concentration. But containing ratio of components was nearly equal to that of sea water. Enrichment coefficient based on Copenhagen water were 0.8～1.2 with some exceptional case.