[A-AS05] 大気化学

[AAS05-01] 雪氷ー大気間の物質輸送に関する研究：北極海長期漂流観測より

★招待講演

*野村 大樹¹ (1.北海道大学北方生物圏フィールド科学センター)

キーワード：物質循環、ガス交換、海氷

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.