Simulated Impact of Ocean Alkalinity Enhancement on Atmospheric CO 2 Removal in the Bering Sea

Wang, Hongjie; Pilcher, Darren J.; Kearney, Kelly A.; Cross, Jessica N.; Shugart, O. Melissa; Eisaman, Matthew D.; Carter, Brendan R.

doi:10.1029/2022ef002816

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Simulated Impact of Ocean Alkalinity Enhancement on Atmospheric CO 2 Removal in the Bering Sea

2023
By Wang, Hongjie ; Pilcher, Darren J. ; Kearney, Kelly A. ; ...
Source: Earth's Future, 11(1)

[PDF-2.77 MB]

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Details:

Journal Title:

Earth's Future
Personal Author:

Wang, Hongjie ; Pilcher, Darren J. ; Kearney, Kelly A. ; Cross, Jessica N. ; Shugart, O. Melissa ; ... More +

Wang, Hongjie ; Pilcher, Darren J. ; Kearney, Kelly A. ; Cross, Jessica N. ; Shugart, O. Melissa ; Eisaman, Matthew D. ; Carter, Brendan R. Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; AFSC (Alaska Fisheries Science Center) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; PMEL (Pacific Marine Environmental Laboratory)

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; AFSC (Alaska Fisheries Science Center) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

Ocean alkalinity enhancement (OAE) has the potential to mitigate ocean acidification (OA) and induce atmospheric carbon dioxide (CO2) removal (CDR). We evaluate the CDR and OA mitigation impacts of a sustained point-source OAE of 1.67 × 10 10 mol total alkalinity (TA) yr −1 (equivalent to 667,950 metric tons NaOH yr −1) in Unimak Pass, Alaska. We find the alkalinity elevation initially mitigates OA by decreasing pCO2 and increasing aragonite saturation state and pH. Then, enhanced air-to-sea CO2 exchange follows with an approximate e-folding time scale of 5 weeks. Meaningful modeled OA mitigation with reductions of >10 μatm pCO2 (or just under 0.02 pH units) extends 100–100,000 km 2 around the TA addition site. The CDR
Keywords:

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Earth And Planetary Sciences (miscellaneous) General Environmental Science
Source:

Earth's Future, 11(1)
DOI:

https://doi.org/10.1029/2022ef002816
ISSN:

2328-4277;2328-4277;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Library
Main Document Checksum:

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urn:sha256:6ff271fac590c3bb7dafca1bbfc498338c42646d1a9fa55e4a10185b7226687b
Download URL:

https://repository.library.noaa.gov/view/noaa/54976/noaa_54976_DS1.pdf
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