GC039
Exploring Ocean Alkalinity Enhancement: Theory, practice, models, and measurements at a new frontier in marine carbon dioxide removal
Session ID#: 161584
Session Description:
According to IPCC AR6, emissions strategies that limit climate warming to 1.5 – 2 °C by 2100 rely on carbon dioxide removal (CDR) to some degree. These removal goals will necessarily be met by a portfolio of techniques. One of the most promising methods of marine CDR is Ocean Alkalinity Enhancement (OAE), which facilitates ocean uptake of additional CO2 from the atmosphere through a series of well-known chemical reactions. Preliminary analysis and research suggest that CO2 storage from OAE could be both scalable and durable; however, direct measurement of carbon drawdown from OAE could be particularly challenging in real-world settings because the CO2 uptake is likely to occur slowly and across large areas of the surface ocean. In this session, we invite submissions addressing potential applications of OAE at large (global) and small (local) scales, including discussions of: OAE theory or natural analogues; analyses of the efficiency, scalability, and durability of OAE; results from field-trials or large-scale tank or mesocosm experiments; possible co-benefits (such as ocean acidification mitigation) and potential risks (e.g., trace metal shock) that result from OAE approaches; co-benefits of pairing OAE with other CDR approaches; and proposed techniques for monitoring, reporting, and verifying impacts of OAE projects. Ultimately, our goal is to provide the AGU community an overview of the open questions OAE research that define the method's promise and challenges.
Index Terms:
0428 Carbon cycling [BIOGEOSCIENCES]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4835 Marine inorganic chemistry [OCEANOGRAPHY: CHEMICAL]
Primary Convener: Jessica N Cross, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Conveners: Brendan Carter, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States and Matthew Eisaman, Stony Brook University, Electrical & Computer Engineering, Stony Brook, United States
Student/Early Career Convener: Hongjie Wang, University of Rhode Island, Marine and Atmospheric Chemistry Phone:, Narragansett, RI, United States
Understanding the Observable Range of Point-Source Ocean Alkalinity Enhancement (1087263)
Mallory Ringham, Stony Brook University, Stony Brook, United States, Hongjie Wang, University of Rhode Island, Marine and Atmospheric Chemistry Phone:, Narragansett, RI, United States, Kelly Kearney, University of Washington, Joint Institute for the Study of the Atmosphere and Ocean, Seattle, WA, United States, Darren Pilcher, University of Wisconsin Madison, Madison, WI, United States, Brendan Carter, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States and Matthew Eisaman, Stony Brook University, Electrical & Computer Engineering, Stony Brook, United States
Understanding the Kinetics of Electrochemically derived Magnesium Hydroxide for Ocean Alkalinity Enhancement (1088304)
Cody Shaw, Stony Brook University, Chemistry, Stony Brook, United States, Mallory Ringham, Stony Brook University, Stony Brook, United States, Xi Lu, Stony Brook University, Department of Electrical and Computer Engineering, Stony Brook, NY, United States, Brendan Carter, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Matthew Eisaman, Stony Brook University, Electrical & Computer Engineering, Stony Brook, United States and Mike Tyka, Google, Mountain View, United States
Characterization of an Electrochemical Approach to Ocean Alkalinity Enhancement (1090591)
Xi Lu1, Mallory Ringham2, Nathan Hirtle2, Katherine Hillis2, Cody Shaw3, Julian Herndon4, Brendan Carter5 and Matthew Eisaman6, (1)Stony Brook University, Department of Electrical and Computer Engineering, Stony Brook, NY, United States, (2)Stony Brook University, Stony Brook, United States, (3)Stony Brook University, Chemistry, Stony Brook, United States, (4)NOAA Pacific Marine Environmental Laboratory, Seattle, United States, (5)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (6)Stony Brook University, Electrical & Computer Engineering, Stony Brook, United States
Exploring carbonate-based ocean alkalinity enhancement through laboratory and mesocosm experiments with a focus on carbon fixers (Invited) (1158569)
Debora Iglesias-Rodriguez1, James Gately2, Sylvia M Kim1 and Benjamin Jin2, (1)University of California, Santa Barbara, Ecology, Evolution, and Marine Biology, Santa Barbara, United States, (2)University of California Santa Barbara, Ecology, Evolution and Marine Biology, Santa Barbara, United States
Environmental impacts and carbon capture potential of mineral-based ocean alkalinity enhancement (1179900)
Christopher T. Reinhard, Georgia Institute of Technology Main Campus, School of Earth and Atmospheric Sciences, Atlanta, GA, United States, Mojtaba Fakhraee, Yale University, Department of Earth and Planetary Sciences, New Haven, United States, Noah Planavsky, Yale University, Department of Earth & Planetary Sciences, New Haven, CT, United States and Zijian Li, Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, United States
Microbial Ecosystem Responses to Alkalinity Enhancement in the North Atlantic Subtropical Gyre (1189342)
Adam Subhas1, Sarah Reynolds2, Lukas Marx3, Anita Flohr4, Peter Brown5, B. B. Cael6 and Edward Mawji5, (1)Woods Hole Oceanographic Institution, Woods Hole, United States, (2)University of Portsmouth, School of Earth & Environmental Sciences, Portsmouth, United Kingdom, (3)University of Portsmouth, Portsmouth, United Kingdom, (4)University of Southampton, Southampton, SO14, United Kingdom, (5)National Oceanography Center, Soton, Southampton, United Kingdom, (6)National Oceanography Centre, Southampton, United Kingdom
Emiliania huxleyi response to Ocean Alkalinity Enhancement in Laboratory Culture (1190922)
Aaron MacDonald, Cranston, Rhode Island, UNITED STATES, Adam Subhas, California Institute of Technology, Pasadena, CA, United States and Chloe Smith, Woods Hole Oceanographic Institution, Ocean Chemistry, Woods Hole, United States
Alkalinity enhancement and carbon capture potential in blue carbon ecosystems (1194265)
Noah Planavsky, Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States, Mojtaba Fakhraee, Yale University, New Haven, United States and Christopher T. Reinhard, California Institute of Technology, Pasadena, United States
Preliminary Findings From a Small-Scale Field Trial of Coastal Enhanced Weathering with Olivine in NY, USA (1202558)
Grace Andrews1, Ocea van Loenen2, Hailey Hayes1, Sydney Ethen1, Cheyenne Moreau1, Ryan Hostak1, Ryan Halonen1, Emilia Jankowska1, Chloe Leach1, Olivier Sulpis1,2, Christopher Gobler3, Robert Cerrato3, Matthew Sclafani4, Nicolas S. Fisher3, Jack J Middelburg2, Francesc Montserrat1, Stephen Romaniello1 and Nathan gerard Walworth1,5, (1)Vesta, San Francisco, United States, (2)Utrecht University, Utrecht, Netherlands, (3)Stony Brook University, Stony Brook, United States, (4)Cornell University, Ithaca, United States, (5)University of Southern California
