[A-CG52] [JJ] Biogeochemical linkages between the ocean and the atmosphere during phytoplankton blooms

Thu. May 25, 2017 10:45 AM - 12:15 PM 304 (International Conference Hall 3F)

convener:Jun Nishioka(Hokkaido University, Institute of low temperature sciences), Koji Suzuki(Hokkaido University), Yuzo Miyazaki(Institute of Low Temperature Science, Hokkaido University), Hiroshi Tanimoto(National Institute for Environmental Studies), Chairperson:Yuzo Miyazaki(Institute of Low Temperature Science, Hokkaido University), Chairperson:Hiroshi Tanimoto(National institute for environmental studies)

Multi-scale vertical and horizontal ocean mixing processes can strongly influence the distribution of dissolved and suspended substances including macro- and micro-nutrients, and may impact on phytoplankton bloom formation. The changes in nutrient dynamics generally affect the abundance, composition and metabolic activity of marine organisms such as phytoplankton and bacteria during the bloom. Marine phytoplankton can produce volatile organic compounds (VOCs) and marine atmospheric aerosols, which strongly influence on atmospheric chemistry. Primary and secondary organic and inorganic components produced via marine phytoplankton activity can contribute to the Earth's radiative forcing, and in turn marine ecosystems including biogeochemical processes directly or indirectly. Therefore, the biogeochemical cycles have a tight linkage between the ocean and the atmosphere. In order to understand physical, chemical and biological processes relevant to phytoplankton bloom formation in the ocean, dynamics of VOCs and marine aerosols in the atmosphere, and the biogeochemical linkage between the ocean and the atmosphere, we welcome new interdisciplinary presentations and active discussions on physical, chemical and biological sciences both from ocean and atmospheric fields in this session.

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10:45 AM - 11:00 AM

[ACG52-07] Interannual variation of seasonality of primary production in the subarctic region of western North Pacific

*Takuro Kaneko¹, Toru Hirawake², Jun Nishioka³ (1.Graduate school of Fisheries Sciences, Hokkaido Univeristy, 2.Faculty of Fisheries Sciences, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University)

11:00 AM - 11:15 AM

[ACG52-08] Abundance and distribution of dimethylsulfoniopropionate-degrading bacteria in the Oyashio water off the coast of Hokkaido, northern Japan

Yingshun Cui^1,2, Shotaro Suzuki¹, Ryo Kaneko^1,3, Shu Kuan Wong¹, *Koji Hamasaki¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Korea Research Institute of Bioscience and Biotechnology, 3.Graduate School of Environmental and Life Science, Okayama University)

11:15 AM - 11:30 AM

[ACG52-09] Marine and atmospheric observations of volatile organic compounds during early spring in the Oyashio region

*Yuko Omori¹, Hiroshi Tanimoto², Satoshi Inomata², Sachiko Okamoto², Yuzo Miyazaki³, Jun Nishioka³ (1.University of Tsukuba, 2.National Institute for Environmental Studies, 3.Hokkaido University)

11:30 AM - 11:45 AM

[ACG52-10] Linkages between atmospheric organic aerosols and surface seawater during phytoplankton blooms in spring

*Yuzo Miyazaki¹, Michihiro Mochida², Kaori Kawana^1,2,3, Eri Tachibana¹, Sara Kagami², Yuko Omori^4,5, Hiroshi Tanimoto⁴, Youhei Yamashita⁶, Koji Suzuki⁶, Jun Nishioka¹ (1.Institute of Low Temperature Science, Hokkaido Univ., 2.Nagoya Univ., 3.Univ. of Tokyo, 4.National Institute for Environmental Studies, 5.Univ. of Tsukuba, 6.Graduate School of Env. Sci., Hokkaido Univ.)

11:45 AM - 12:00 PM

[ACG52-11] Number-size distribution and cloud condensation nuclei (CCN) activity of marine aerosol over the northern North Pacific in spring

*Kaori Kawana^1,2, Michihiro Mochida¹, Yuzo Miyazaki³, Sara Kagami¹ (1.Graduate School of Environmental Studies, Nagoya University, 2.Graduate School of Arts and Sciences, the University of Tokyo, 3.Institute of Low Temperature Science, Hokkaido University)

12:00 PM - 12:15 PM

[ACG52-12] Size distributions and CCN activities of marine aerosols obtained in the longitudinal observation over the Pacific Ocean

*Yoko Iwamoto¹, Yusuke Miki², Shintaro Yokoyama², Kazuhiko Miura², Mitsuo Uematsu³, Hiroshi Furutani⁴ (1.Graduate School of Biosphere Science, Hiroshima University, 2.Graduate School of Science, Tokyo University of Science, 3.Atmosphere and Ocean Research Institute, the University of Tokyo, 4.Center for Scientific Instrument Renovation and Manufacturing Support, Osaka University)

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