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| one publication added to basket [361683] | |
| Ocean alkalinity enhancement through enhanced silicate weathering in coastal areas: a long-term mesocosm study Hylén, A.; Kreuzburg, M.; De Wolf, S.; Burdorf, L.; Fiers, G.; Goossens, C.; Van Heurck, B.; Theetaert, H.; Verbrugge, S.; Cnudde, V.; Cattrijsse, A.; Meysman, F.J.R. (2023). Ocean alkalinity enhancement through enhanced silicate weathering in coastal areas: a long-term mesocosm study, in: EGU General Assembly 2023. Vienna, Austria & Online, 23–28 April 2023. pp. EGU23-14128. https://dx.doi.org/10.5194/egusphere-egu23-14128
In: (2023). EGU General Assembly 2023. Vienna, Austria & Online, 23–28 April 2023. European Geosciences Union: [s.l.].
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| Documenttype: Samenvatting | |
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| Abstract |
Here we present results from the first and longest-running mesocosm experiment investigating ESW and associated CO2 uptake in coastal marine sediments. Using tanks containing one square meter of natural seafloor each, we have studied biogeochemical cycling in sediment treated with the fast-weathering silicate mineral olivine. Lugworms (Arenicola marina) were added to some tanks to investigate the effect of bioturbation on the olivine dissolution rate, as well as the impact of olivine addition on biota. In the mesocosms, we quantified the sedimentary release of alkalinity and other weathering end-products (trace metals and dissolved silicate). Five years into the experiment, olivine dissolution is obvious from an elevated sedimentary alkalinity release and decreased average olivine grain size. The elevated alkalinity release has further led to higher CO2 sequestrations in tanks with olivine. Based on the results from this unique mesocosm setup, we will discuss the large-scale effect of ESW on biogeochemical cycling in coastal ecosystems. |
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