NON-SEA-SALT SULFATE AND NITRATE VARIATIONS IN THE S25 CORE, NEAR THE COASTAL REGION, EAST ANTARCTICA

• Main Authors: ワタナベ コウイチ, サトウ カズヒデ, カミヤマ コキチ, モトヤマ ヒデアキ, ワタナベ オキツグ, Koichi WATANABE, Kazuhide SATOW, Kokichi KAMIYAMA, Hideaki MOTOYAMA, Okitsugu WATANABE
• Format: Report
• Language: English
• Published: Scientific Paper 1999
• Subjects: Antarctic; The Antarctic; East Antarctica; Mizuho; Mizuho Plateau; Antarc*; Antarctica; Polar meteorology and glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2890; http://id.nii.ac.jp/1291/00002890/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2890&item_no=1&attribute_id=18&file_no=1

Non-sea-salt sulfate (nssSO_4^<2->) and nitrate (NO_3^-) data in the S25 core in the coastal region on Mizuho Plateau, East Antarctica, have been analyzed. Time series of nssSO_4^<2-> which is mainly derived from marine-biogenic sulfur (DMS), showed not only seasonal variations, but also 4-5 year and about 8 year variations. The result indicates that DMS emission and the transport process of nssSO_4^<2-> may be affected by the Antarctic Circumpolar Wave (ACW), whose initiation is probably associated with El Nino activity. The NO_3 concentrations in the S25 core presented about 11-year variations corresponding to the solar cycle.