The land–ocean Arctic carbon cycle

Nature Reviews Earth & Environment, Journal Year: 2025, Volume and Issue: 6(2), P. 86 - 105

Published: Feb. 1, 2025

Language: Английский

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Paving the Way for Improved Representation of Coupled Physical and Biogeochemical Processes in Arctic River Plumes—A Case Study of the Mackenzie Shelf

Permafrost and Periglacial Processes, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

ABSTRACT Processes affecting the transformation of riverine dissolved organic carbon (DOC) across land‐to‐ocean aquatic continuum are still poorly constrained in Arctic models, leading to large uncertainties simulated air–sea CO 2 fluxes coastal periphery. Here we use ECCO‐Darwin regional configuration Southeastern Beaufort Sea analyze sensitivity cycling (1) model vertical discretization and (2) different parameterizations Mackenzie River discharge. We show that DOC lifetime rather than its volume largely modulates plume fluxes, (SBS) being either a source (0.03 Tg C year −1 ) or sink (−0.20 atmospheric carbon. estuarine processes, such as flocculation, also play an important role can dampen outgassing by up 0.07 . In terms physics, increasing grid resolution, better fit observed structure, without altering concentrations DOC. However, decrease river forcing cell increases local p promotes elevated vicinity Delta. Our work demonstrates future land–ocean models must consider intricate details systems realistically simulate coastal‐ocean physics biogeochemistry.

Language: Английский

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Climate feedbacks from coastal erosion

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(9), P. 899 - 900

Published: Aug. 12, 2024

Language: Английский

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