Western North Pacific Integrated Physical-Biogeochemical Ocean Observation Experiment: Summary of the Intensive Observation Around the Biogeochemical Mooring S1 (S1-INBOX)

Toshio Suga1,2, Ryuichiro Inoue3, Dr. Shinya Kouketsu4, Shigeki Hosoda5, Taiyo Kobayashi3, Kanako Sato6, Hiroyuki Nakajima7, Makio C Honda3, Tetsuichi Fujiki8, Kazuhiko Matsumoto3, Takeshi Kawano3 and Toshiro Saino3, (1)Tohoku University, Yokosuka, Japan, (2)Tohoku University, Graduate School of Science, Sendai, Japan, (3)JAMSTEC, Yokosuka, Japan, (4)JAMSTEC, WPI-AIMEC, Yokohama, Japan, (5)WPI-AIMEC, Yokohama, Japan, (6)Ministry of Environment, Tokyo, Japan, (7)Marine Works Japan, Yokosuka, Japan, (8)JAMSTEC, Research Institute for Global Change, Yokosuka, Japan
Abstract:
The interdisciplinary project called the Western North Pacific Integrated Physical-Biogeochemical Experiment (INBOX) has been conducted since 2011. As the first phase of INBOX, more than 20 profiling floats with a dissolved oxygen sensor were deployed in late July 2011 within the 150-km square area centered at the biogeochemical mooring site S1 (30N, 145E) in the oligotrophic subtropics. The horizontal (30 km) and temporal (2 days) resolutions of the float array were set in order to capture relationship between biogeochemical phenomena and physical processes such as westward propagating eddies and atmospheric disturbances. The observations of large mass flux at 200 m, a high chlorophyll-a concentration in the deep chlorophyll maximum layer, large Fv/Fm ration and high dissolved oxygen concentration in the shallow oxygen maximum layer will be summarized and interpreted as biogeochemical responses to physical processes in and around mesoscale eddies including submesoscale motions, diapycnal mixing and surface wind forcing.
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