The atmospheric carbon sequestration potential of man-made tidal lagoons

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The atmospheric carbon sequestration potential of man-made tidal lagoons. / Piano, Marco; Papadimitriou, Stathys; Roche, Ronan; Bowers, David; Kennedy, David; Kennedy, Hilary.

In: Continental Shelf Research, 15.06.2019, p. 90-102.

Research output: Contribution to journalArticle

HarvardHarvard

Piano, M, Papadimitriou, S, Roche, R, Bowers, D, Kennedy, D & Kennedy, H 2019, 'The atmospheric carbon sequestration potential of man-made tidal lagoons', Continental Shelf Research, pp. 90-102. https://doi.org/10.1016/j.csr.2019.05.011

APA

Piano, M., Papadimitriou, S., Roche, R., Bowers, D., Kennedy, D., & Kennedy, H. (2019). The atmospheric carbon sequestration potential of man-made tidal lagoons. Continental Shelf Research, 90-102. https://doi.org/10.1016/j.csr.2019.05.011

CBE

Piano M, Papadimitriou S, Roche R, Bowers D, Kennedy D, Kennedy H. 2019. The atmospheric carbon sequestration potential of man-made tidal lagoons. Continental Shelf Research. 90-102. https://doi.org/10.1016/j.csr.2019.05.011

MLA

VancouverVancouver

Piano M, Papadimitriou S, Roche R, Bowers D, Kennedy D, Kennedy H. The atmospheric carbon sequestration potential of man-made tidal lagoons. Continental Shelf Research. 2019 Jun 15;90-102. https://doi.org/10.1016/j.csr.2019.05.011

Author

Piano, Marco ; Papadimitriou, Stathys ; Roche, Ronan ; Bowers, David ; Kennedy, David ; Kennedy, Hilary. / The atmospheric carbon sequestration potential of man-made tidal lagoons. In: Continental Shelf Research. 2019 ; pp. 90-102.

RIS

TY - JOUR

T1 - The atmospheric carbon sequestration potential of man-made tidal lagoons

AU - Piano, Marco

AU - Papadimitriou, Stathys

AU - Roche, Ronan

AU - Bowers, David

AU - Kennedy, David

AU - Kennedy, Hilary

PY - 2019/6/15

Y1 - 2019/6/15

N2 - Understanding sequestration of carbon by coastal ecosystems is central to addressing the role they play in climate change mitigation. To quantify this process, accurate measurements of CO2 fluctuation, coupled with variations in residence time of coastal water-bodies are required. Nearshore ecosystems, including coastal lagoons, may provide an effective sink for atmospheric carbon dioxide, particularly those containing productive biota such as seagrass. However, the rate and pattern of carbon sequestration in seagrass meadows across a range of environmental settings is still poorly constrained. In this study, we utilize a robust physical tidal model, along with biogeochemical dissolved inorganic carbon (DIC) assessment, to estimate water residence time and net sequestration of atmospheric CO2 in an intertidal lagoon containing a seagrass (Zostera noltii) meadow. Total alkalinity and pH measurements taken from advected water mass exchanged with the open ocean at inlet boundaries are used to calculate DIC and pCO2. A predictive model of hydrodynamics provides good approximation of mean water residence time to within 6 h (±3 s.d). Results indicate that during the daytime study period the lagoon is a sink for carbon, having a mean net ecosystem productivity (NEP) of 3.0 ± 0.4 mmol C m−2 hr−1. An equivalent diel NEP range of between 15.23 and −9.24 mmol C m−2 d−1 is calculated based on reported shallow water pelagic respiration rates. Moreover, approximately 4% of DIC availability occurs from atmospheric CO2 transfer to lagoon water. However, a negative diel rate of −82 ± 81 mmol C m−2 d−1 is found, assuming overnight respiration ascertained from converted Zostera noltii O2 utilization. We hypothesize that analogous regional nearshore ecosystems provide baseline study sites suitable to elucidate the carbon capture potential of planned, nearby tidal range energy schemes.

AB - Understanding sequestration of carbon by coastal ecosystems is central to addressing the role they play in climate change mitigation. To quantify this process, accurate measurements of CO2 fluctuation, coupled with variations in residence time of coastal water-bodies are required. Nearshore ecosystems, including coastal lagoons, may provide an effective sink for atmospheric carbon dioxide, particularly those containing productive biota such as seagrass. However, the rate and pattern of carbon sequestration in seagrass meadows across a range of environmental settings is still poorly constrained. In this study, we utilize a robust physical tidal model, along with biogeochemical dissolved inorganic carbon (DIC) assessment, to estimate water residence time and net sequestration of atmospheric CO2 in an intertidal lagoon containing a seagrass (Zostera noltii) meadow. Total alkalinity and pH measurements taken from advected water mass exchanged with the open ocean at inlet boundaries are used to calculate DIC and pCO2. A predictive model of hydrodynamics provides good approximation of mean water residence time to within 6 h (±3 s.d). Results indicate that during the daytime study period the lagoon is a sink for carbon, having a mean net ecosystem productivity (NEP) of 3.0 ± 0.4 mmol C m−2 hr−1. An equivalent diel NEP range of between 15.23 and −9.24 mmol C m−2 d−1 is calculated based on reported shallow water pelagic respiration rates. Moreover, approximately 4% of DIC availability occurs from atmospheric CO2 transfer to lagoon water. However, a negative diel rate of −82 ± 81 mmol C m−2 d−1 is found, assuming overnight respiration ascertained from converted Zostera noltii O2 utilization. We hypothesize that analogous regional nearshore ecosystems provide baseline study sites suitable to elucidate the carbon capture potential of planned, nearby tidal range energy schemes.

U2 - 10.1016/j.csr.2019.05.011

DO - 10.1016/j.csr.2019.05.011

M3 - Article

SP - 90

EP - 102

JO - Continental Shelf Research

JF - Continental Shelf Research

SN - 0278-4343

ER -