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Ocean Alkalinity Enhancement from Coastal Outfalls — Isometric

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This Protocol provides the requirements and procedures for the calculation of net carbon dioxide equivalent (CO₂e) removal from the atmosphere via Ocean Alkalinity Enhancement (OAE) from coastal outfalls. OAE is a marine Carbon Dioxide Removal (CDR) technique that has a potential co-benefit of locally mitigating ocean acidification1 and mimics Earth’s natural process for regulating atmospheric carbon dioxide (CO₂). Over geologic timescales, there are various processes that act to regulate atmospheric CO₂, such as the weathering cycle2 and deep ocean neutralization of sediments3. Silicate rock weathering reactions remove carbon dioxide from the atmosphere to produce chemically stable bicarbonate and carbonate ions. Riverine transport subsequently brings the bicarbonate and carbonate ions to the ocean where they are stored on multi-millennial timescales. OAE aims to speed up this natural process by adding CO₂-reactive alkalinity to the surface ocean to shift CO₂ in the ocean to bicarbona

Contents 1.0 Introduction Introduction This Protocol provides the requirements and procedures for the calculation of net carbon dioxide equivalent ( CO₂e ) removal from the atmosphere via Ocean Alkalinity Enhancement (OAE) from coastal outfalls. OAE is a marine Carbon Dioxide Removal (CDR) technique that has a potential co-benefit of locally mitigating ocean acidification 1 and mimics Earth’s natural process for regulating atmospheric carbon dioxide (CO₂). Over geologic timescales, there are various processes that act to regulate atmospheric CO₂, such as the weathering cycle 2 and deep ocean n

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