Japan Geoscience Union Meeting 2023

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[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-HW Hydrology & Water Environment

[A-HW18] Material transportation and cycling at the land-sea interface: from headwaters to the ocean

Fri. May 26, 2023 3:30 PM - 4:45 PM 105 (International Conference Hall, Makuhari Messe)

convener:Takahiro Hosono(Faculty of Advanced Science and Technology, Kumamoto University), Syuhei Ban(The University of Shiga Prefecture), Mitsuyo Saito(Graduate School of Advanced Science and Engineering, Hiroshima University), Adina Paytan(University of California Santa Cruz), Chairperson:Takahiro Hosono(Faculty of Advanced Science and Technology, Kumamoto University)


3:30 PM - 3:45 PM

[AHW18-16] Impacts of Carbon Dioxide Removal technologies on land-ocean-matter flux and coastal waters

★Invited Papers

*Jens Hartmann1 (1.Institute for Geology, Center for Earth System Research and Sustainability (CEN), Universität Hamburg)

Keywords:CO2, carbon dioxide removal, alkalinity, nutrients, enhanced weathering, ocean alkalinity enhancement

Removing large volumes of CO2 from the atmosphere, as well as rapid and deep emission reductions, are required to meet the goals of the Paris Agreement. This has catalyzed recent attention on carbon dioxide removal (CDR) approaches that can remove more CO2 from the atmosphere than they emit. Some of the proposed methods include Enhanced Weathering (the application of rock powder to land or the coastal zone), biochar (transformed biomass into biochar and applied to soils) or Ocean Alkalinity Enhancement (addition of alkalinity to rivers or seawater to increase the capacity of water to bind CO2).
An overview of recent proposals, state of knowledge, considering costs and CDR potentials, will be provided. Research gaps in context of land-ocean matter transfer will be discussed.