Deep ocean steady-state transport and decadal variability inferred from 1980-2021 anthropogenic transient tracer observations

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• Laura Cimoli (University of Cambridge)
• Thursday 09 March 2023, 11:30-12:30
• Open Plan Area, Institute for Energy and Environmental Flows, Madingley Rise CB3 0EZ.

If you have a question about this talk, please contact Catherine Pearson.

The penetration of chlorofluorocarbons (CFCs) and sulfur-hexafluoride (SF6) into the oceans represents an opportunity to trace intermediate-to-abyssal water masses as they leave the surface mixed layer and estimate the ventilation rate of the global ocean since 1940. Here, we analyze CFC and SF6 observations that have been taken over four decades, permitting the largest fraction of the global ocean to be analyzed using these tracers. An inverse method is developed to address the temporal sparsity of the observations and an eight-decade annually resolved picture of CFCs and SF6 evolution is produced. By comparing the reconstructed, steady-state concentrations with the available observations, we infer ventilation rate changes on decadal timescales.

This talk is part of the Institute for Energy and Environmental Flows (IEEF) series.

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• All Talks (aka the CURE list)
• Cambridge Energy Seminars
• Department of Earth Sciences seminars
• Institute for Energy and Environmental Flows (IEEF)
• NanoDTC Energy Materials Talks
• Open Plan Area, Institute for Energy and Environmental Flows, Madingley Rise CB3 0EZ
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