Steiner, Z and Landing, WM and Bohlin, MS and Greaves, M and Prakash, S and Vinayachandran, PN and Achterberg, EP (2022) Variability in the Concentration of Lithium in the Indo-Pacific Ocean. In: Global Biogeochemical Cycles, 36 (6).
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Abstract
Lithium has limited biological activity and can readily replace aluminium, magnesium and iron ions in aluminosilicates, making it a proxy for the inorganic silicate cycle and its potential link to the carbon cycle. Data from the North Pacific Ocean, tropical Indian Ocean, Southern Ocean and Red Sea suggest that salinity normalized dissolved lithium concentrations vary by up to 2%–3% in the Indo-Pacific Ocean. The highest lithium concentrations were measured in surface waters of remote North Pacific and Indian Ocean stations that receive relatively high fluxes of dust. The lowest dissolved lithium concentrations were measured just below the surface mixed layer of the stations with highest surface water concentrations, consistent with removal into freshly forming aluminium rich phases and manganese oxides. In the North Pacific, water from depths >2,000 m is slightly depleted in lithium compared to the initial composition of Antarctic Bottom Water, likely due to uptake of lithium by authigenically forming aluminosilicates. The results of this study suggest that the residence time of lithium in the ocean may be significantly shorter than calculated from riverine and hydrothermal fluxes.
| Item Type: | Journal Article |
|---|---|
| Publication: | Global Biogeochemical Cycles |
| Publisher: | John Wiley and Sons Inc |
| Additional Information: | The copyright for this article belongs to the Author(s). |
| Keywords: | biological analysis; carbon cycle; dust; lithium, Indian Ocean; Pacific Ocean; Pacific Ocean; Pacific Ocean (North); Red Sea; Southern Ocean |
| Department/Centre: | Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences |
| Date Deposited: | 21 Sep 2022 09:06 |
| Last Modified: | 21 Sep 2022 09:06 |
| URI: | https://eprints.iisc.ac.in/id/eprint/76628 |
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