Groundwater releases CO 2 to diverse global coastal ecosystems DOI Creative Commons
Aprajita Singh Tomer, Tristan McKenzie, Claudia Majtényi‐Hill

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(2)

Published: Jan. 10, 2025

Coastal ecosystems play a major role in marine carbon budgets, but substantial uncertainties remain the sources and fluxes of coastal dioxide (CO 2 ). Here, we assess when, where, how submarine groundwater discharge (SGD) releases CO to shallow ecosystems. Time-series observations dissolved radon ( 222 Rn, natural tracer) across 40 systems from 14 countries revealed large SGD-derived fluxes. The mean partial pressure was 35 times higher than surface seawater. flux 148 ± 226 millimoles per square meter day (mmol m −2 −1 ), resulting water-air 80 133 mmol . Tidal rather diel cycles drove enrichment most Tidally driven SGD primary source mangroves, salt marshes, tidal flats, estuaries, canals. Overall, expand current knowledge by demonstrating as an important that requires inclusion budgets.

Language: Английский

Groundwater releases CO 2 to diverse global coastal ecosystems DOI Creative Commons
Aprajita Singh Tomer, Tristan McKenzie, Claudia Majtényi‐Hill

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(2)

Published: Jan. 10, 2025

Coastal ecosystems play a major role in marine carbon budgets, but substantial uncertainties remain the sources and fluxes of coastal dioxide (CO 2 ). Here, we assess when, where, how submarine groundwater discharge (SGD) releases CO to shallow ecosystems. Time-series observations dissolved radon ( 222 Rn, natural tracer) across 40 systems from 14 countries revealed large SGD-derived fluxes. The mean partial pressure was 35 times higher than surface seawater. flux 148 ± 226 millimoles per square meter day (mmol m −2 −1 ), resulting water-air 80 133 mmol . Tidal rather diel cycles drove enrichment most Tidally driven SGD primary source mangroves, salt marshes, tidal flats, estuaries, canals. Overall, expand current knowledge by demonstrating as an important that requires inclusion budgets.

Language: Английский

Citations

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