Redistribution of anthropogenic ocean carbon in response to negative emission

Seminar by Dr. Kyungmin Noh from Yonsei University

06 November 2023
KST 14:00 – 15:00

The Seminar is being held in Room 1010 (Jasmin) – Integrated mechanical engineering building. Click here for the campus map.

 Due to the escalating anthropogenic carbon emission, the anthropogenic carbon has been absorbed and accumulated in the upper ocean through penetration of carbon from the atmosphere. To mitigate the adverse impacts of climate changes, there has been a pressing need for negative emissions strategies to reduce CO2 concentration. Hysteresis and irreversibility of ocean carbon uptake has been suggested in response to the negative emission. However, uncertainties persist regarding the pathways and fates of these accumulated anthropogenic carbons. This study addresses the intricate dynamics of anthropogenic ocean carbon in response to negative emission employing an emission-driven fully coupled model. Notably, distinct basin-contrasts between the Pacific and Atlantic Oceans have emerged in the spatial distribution of accumulated carbon, connected by deep ocean conveyor belt. While negative emissions succeed in removing anthropogenic carbon in the upper ocean, this study reveals a prolonged presence in the deep Atlantic and Southern Ocean, characterized by extended memory and varied time-lagged responses. Significantly, the research highlights the pivotal role of Southern Ocean bridges in redistributing anthropogenic carbon. This sheds light on crucial aspects of deep ocean circulation operating on century timescales, thereby influencing ocean carbon dynamics.