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Variability in the Concentration of Lithium in the Indo-Pacific Ocean
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- Steiner, Zvi (author)
- GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany.
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- Landing, William M. (author)
- Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
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- Bohlin, Madeleine S. (author)
- Uppsala universitet,Paleobiologi,Univ Cambridge, Dept Earth Sci, Cambridge, England
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- GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA. (creator_code:org_t)
- American Geophysical Union (AGU), 2022
- 2022
- English.
- In: Global Biogeochemical Cycles. - : American Geophysical Union (AGU). - 0886-6236 .- 1944-9224. ; 36:6
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Keyword
- dust
- GEOTRACES
- North Pacific
- Indian Ocean
- lithium
- Li
- Na
Publication and Content Type
- ref (subject category)
- art (subject category)
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