Using excess 3He to estimate Southern Ocean upwelling time scales
Citable URI
https://hdl.handle.net/1912/26214As published
https://doi.org/10.1029/2020GL087266DOI
10.1029/2020GL087266Keyword
hydrothermal budgets; meridional overturning circulation; marine productivity; micronutrients; dissolved iron; Southern Ocean upwellingAbstract
Using a recently compiled global marine data set of dissolved helium isotopes and helium and neon concentrations, we make an estimate of the inventory of hydrothermal 3He in the Southern Ocean to be 4.9 ± 0.6 × 104 moles. Under the assumption that the bulk of the hydrothermally sourced 3He is upwelled there, we use recent estimates of the global hydrothermal 3He flux to determine an e‐folding residence time of 99 ± 18 years, depending on assumptions of water mass and upwelling boundaries. Our estimate is within the broad range of values obtained from recent Southern Ocean circulation models.
Description
Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 47(15), (2020): e2020GL087266, doi:10.1029/2020GL087266.
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Suggested Citation
Jenkins, W. J. (2020). Using excess 3He to estimate Southern Ocean upwelling time scales. Geophysical Research Letters, 47(15), e2020GL087266.Related items
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