Japan Geoscience Union Meeting 2021

Presentation information

[J] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS05] Atmospheric Chemistry

Sun. Jun 6, 2021 9:00 AM - 10:30 AM Ch.08 (Zoom Room 08)

convener:Tomoki Nakayama(Graduate School of Fisheries and Environmental Sciences, Nagasaki University), Naoko Saitoh(Center for Environmental Remote Sensing), Sakae Toyoda(Department of Chemical Science and Engineering, Tokyo Institute of Technology), Risa Uchida(Japan Automobile Research Institute), Chairperson:Risa Uchida(Japan Automobile Research Institute), Kei Sato(National Institute for Environmental Studies)

9:00 AM - 9:30 AM

[AAS05-01] Cryosphere-atmosphere biogeochemical cycles: Insights from Arctic Ocean drifting campaign

★Invited Papers

*Daiki Nomura1 (1.Field Science Center for Northern Biosphere, Hokkaido University)

Keywords:biogeochemical cycles, gas exchange process, sea ice

Sea ice has until now rarely been considered in estimates of global biogeochemical cycles, especially gas exchanges, because of the assumption that, in ice-covered oceans, sea-ice acts as a barrier for atmosphere–ocean exchange. In order to understand the effects of sea-ice growth and decay processes on the biogeochemical cycles in the polar oceans, field observations in the Arctic, Antarctic, and Sea of Okhotsk as well as laboratory experiments were carried out. Observations over recent decades suggest that sea ice plays a significant role in global biogeochemical cycles, providing an active biogeochemical interface at the cryosphere-atmosphere boundary. In this presentation, I will show preliminary results obtained during the international drift campaign MOSAiC in the central Arctic for the gas dynamics and exchange process between sea ice/water surface and atmosphere.