[A-CG45] Biogeochemical linkages between the surface ocean and atmosphere

Sun. May 21, 2023 9:00 AM - 10:30 AM 102 (International Conference Hall, Makuhari Messe)

convener:Sohiko Kameyama(Hokkaido University), Yoko Iwamoto(Graduate School of Integrated Sciences for Life, Hiroshima University), Maki Noguchi Aita(Japan Agency for Marine-Earth Science and Technology), Naohiro Kosugi(Meteorological Research Institute), Chairperson:Naohiro Kosugi(Meteorological Research Institute), Maki Noguchi Aita(Japan Agency for Marine-Earth Science and Technology)

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 the global carbon cycles. 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. Studies linked to the Surface Ocean-Lower Atmosphere Study (SOLAS) project are good examples, but other related studies are also invited.

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9:00 AM - 9:15 AM

[ACG45-01] Seasonal basin-scale variability of diatoms in surface waters of the North Pacific with their controlling environmental factors

*Koji Suzuki¹, Weichen Qiu¹, Shintaro Takao², Shin-ichiro Nakaoka² (1.Hokkaido University, 2.National Institute for Environmental Studies)

9:15 AM - 9:30 AM

[ACG45-02] Distribution and determinants of nutrients and primary production in the eastern Indian sector of the Southern Ocean

*Manami Tozawa¹, Daiki Nomura^1,2,3, Kaihe Yamazaki⁴, Masaaki Kiuchi¹, Daisuke Hirano^4,5, Shigeru Aoki⁶, Hiroko Sasaki⁷, Hiroto Murase⁸ (1.Faculty/Graduate School of Fisheries Sciences, Hokkaido University, 2.Field Science Center for Northern Biosphere, Hokkaido University, 3.Arctic Research Center, Hokkaido University, 4.National Institute of Polar Research, 5.The Graduate University for Advanced Studies, SOKENDAI, 6.Institute of Low Temperature Science, Hokkaido University, 7.Japan Fisheries Research and Education Agency, Yokohama, 8.Tokyo University of Marine Science and Technology)

9:30 AM - 9:45 AM

[ACG45-03] Characteristics of late summer Arctic brash sea ice and its melting effect on the surface water biogeochemistry in the Chukchi Sea

*Ryota Akino¹, Daiki Nomura^1,2,3, Reishi Sahashi¹, Manami Tozawa¹, Mariko Hatta⁴, Kohei Matsuno^1,3, Takuhei Shiozaki⁵, Takeshi Kinase⁴, Tatsuya Kawakami¹, Masato Ito⁶, Akihiko Murata⁴, Amane Fujiwara⁴ (1.Faculty of Fisheries Sciences, Hokkaido University, 2.Field Science Center for Northern Biosphere, Hokkaido University, 3.Arctic Research Center, Hokkaido University, 4.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 5.Atmosphere and Ocean Research Institute, The University of Tokyo, 6.National Institute of Polar Research)

9:45 AM - 10:00 AM

[ACG45-04] A novel probe to sample trace-metal concentrations in sea ice at high vertical resolution

*Matthew Corkill¹, Takenobu Toyota², Daiki Nomura^3,4,5, Klaus Martin Meiners^6,7,8, Pat Wongpan⁶, Trevor Corkill⁹, Delphine Lannuzel^1,8 (1.Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia, 2.Institute of Low Temperature Science, Hokkaido University, Sapporo, Hokkaido, Japan, 3.Field Science Center for Northern Biosphere, Hokkaido University, Hakodate, Hokkaido, Japan, 4.Arctic Research Center, Hokkaido University, Sapporo, Hokkaido, Japan, 5.Faculty/Graduate school of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido, Japan, 6.Australian Antarctic Program Partnership, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia, 7.Department of Climate Change, Energy, the Environment and Water, Australian Antarctic Division, Kingston, TAS, Australia, 8.Australian Centre for Excellence in Antarctic Science, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia, 9.Antec Proprietary Limited, Midvale, WA, Australia)

10:00 AM - 10:15 AM

[ACG45-05] Light irradiation on bacterial-derived dissolved organic matter as a source of low molecular weight organic compound: A laboratory study

*Royston Uning¹, Yuko Omori², Shigeki Wada³, Hiroshi Tanimoto¹ (1.Earth System Division, National Institute for Environmental Studies, Japan, 2.Faculty of Life and Environmental Sciences, University of Tsukuba, Japan, 3.Shimoda Marine Research Center, University of Tsukuba, Japan)

10:15 AM - 10:30 AM

[ACG45-06] Experimental results of the effect of rainwater addition on surface primary productivity in the northwestern North Pacific in spring

*Kazuhiko Matsumoto¹, Fumikazu Taketani¹, Koji Sugie¹ (1.Japan Agency for Marine-Earth Science and Technology)

Session information