A high-resolution nested model to study the effects of alkalinity additions in Halifax Harbour, a mid-latitude coastal fjord

Laurent, Arnaud; Wang, Bin; Atamanchuk, Dariia; Rakshit, Subhadeep; Azetsu-Scott, Kumiko; Algar, Chris; Fennel, Katja

doi:10.5194/bg-23-115-2026

Articles | Volume 23, issue 1

https://doi.org/10.5194/bg-23-115-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-23-115-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 1

Research article

|

07 Jan 2026

Research article |

| 07 Jan 2026

A high-resolution nested model to study the effects of alkalinity additions in Halifax Harbour, a mid-latitude coastal fjord

Arnaud Laurent, Bin Wang, Dariia Atamanchuk, Subhadeep Rakshit, Kumiko Azetsu-Scott, Chris Algar, and Katja Fennel

Supplement

https://doi.org/10.5194/bg-23-115-2026-supplement

Data sets

A high-resolution nested model to study the effects of alkalinity additions in Halifax Harbour: dataset of simulations A. Laurent et al. https://doi.org/10.20383/103.01525

Model code and software

alaurent101/ROMS_OAE: ROMS biogeochemical model with alkalinity addition (multiple feedstocks) (v2.1.0) A. Laurent et al. https://doi.org/10.5281/zenodo.17871564

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Short summary

Surface ocean alkalinity enhancement, through the release of alkaline materials, is a technology that could increase the storage of anthropogenic carbon in the ocean. Halifax Harbour (Canada) is a current test site for operational alkalinity addition. Here, we present a model of Halifax Harbour that simulates alkalinity addition at various locations of the harbour and quantifies the resulting net CO₂ uptake. The model can be relocated to study alkalinity addition in other coastal systems.