SPORADIC INCREASE OF PARTICLE SEDIMENTATION AT THE ICE EDGE OF THE ANTARCTIC OCEAN DURING THE AUSTRAL SUMMER 1994-1995 (18th Symposium on Polar Biology)

• Main Authors: ササキ ヒロシ, スズキ ヒデカツ, タカヤマ マコト, スズキ コウジ, ハンダ ノブヒコ, クドウ サカエ, フクチ ミツオ, Hiroshi SASAKI, Hidekatsu SUZUKI, Makoto TAKAYAMA, Koji SUZUKI, Nobuhiko HANDA, Sakae KUDOH, Mitsuo FUKUCHI
• Format: Report
• Language: English
• Published: Proceeding 1997
• Subjects: Antarctic; Antarctic Ocean; Austral; The Antarctic; Antarc*; Polar Biology; Proceedings of the NIPR Symposium on Polar Biology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5339; http://id.nii.ac.jp/1291/00005339/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5339&item_no=1&attribute_id=18&file_no=1

Time-series sediment traps were deployed at depths of 537 m, 796 m, 1259 m, 1722 m and 2727 m at ice edge of the Antarctic Ocean (64°42'S, 139°58'E) from 26 December 1994 to 20 January 1995. During a short period from 7 to 9 January, a sporadic flux increase within a few days in terms of total dry weight of 774 mg m^<-2>d^<-1> at 537 m was observed. The mass of sinking particles forming the flux maximum sank down to the deepest trap (2727 m) within 7-11 days, indicating that about 5% of these particles were transported downward to the bottom with the sinking rate of 199-313 m d^<-1> (mean 243 m d^<-1>). The considerable particle loss rate (13% [100 m]^<-1>) below the mesopelagic layers in a short period suggests the occurrence of consumption processes induced by the sporadic supply of freshly produced particles from above.