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[1] The silicic acid leakage hypothesis (SALH) attempts to explain part of the large and regular atmospheric CO2 changes over the last glacial-interglacial cycles. It calls for a reduction in the carbonate pump through a growth in diatoms at the expense of coccolithophorids in low-latitude surface w...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.144.3867 2023-05-15T18:25:28+02:00 Click Here for Full Article The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.144.3867 http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.144.3867 http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf text ftciteseerx 2016-01-07T15:04:49Z [1] The silicic acid leakage hypothesis (SALH) attempts to explain part of the large and regular atmospheric CO2 changes over the last glacial-interglacial cycles. It calls for a reduction in the carbonate pump through a growth in diatoms at the expense of coccolithophorids in low-latitude surface waters, driven by a ‘‘leakage’ ’ of high-Si:N waters from the Southern Ocean. Recent studies that present low opal accumulation rates from the glacial eastern equatorial Pacific have challenged SALH. In a corollary to SALH, we argue that the key to SALH is the dominance of diatoms over coccolithophorids, and this does not depend on the magnitude of diatom production per se. In support of our claim, we show in a numerical model that atmospheric CO 2 can be lowered with even a reduced absolute flux of silicic acid leakage, provided that Si:N in the leakage is elevated and that the excess Si can be used by diatoms to shift the floral composition in their favor. Citation: Matsumoto, K., and J. L. Sarmiento (2008), A corollary to the silicic acid leakage hypothesis, Paleoceanography, 23, PA2203, doi:10.1029/2007PA001515. 1 Text Southern Ocean Unknown Pacific Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) Southern Ocean |
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[1] The silicic acid leakage hypothesis (SALH) attempts to explain part of the large and regular atmospheric CO2 changes over the last glacial-interglacial cycles. It calls for a reduction in the carbonate pump through a growth in diatoms at the expense of coccolithophorids in low-latitude surface waters, driven by a ‘‘leakage’ ’ of high-Si:N waters from the Southern Ocean. Recent studies that present low opal accumulation rates from the glacial eastern equatorial Pacific have challenged SALH. In a corollary to SALH, we argue that the key to SALH is the dominance of diatoms over coccolithophorids, and this does not depend on the magnitude of diatom production per se. In support of our claim, we show in a numerical model that atmospheric CO 2 can be lowered with even a reduced absolute flux of silicic acid leakage, provided that Si:N in the leakage is elevated and that the excess Si can be used by diatoms to shift the floral composition in their favor. Citation: Matsumoto, K., and J. L. Sarmiento (2008), A corollary to the silicic acid leakage hypothesis, Paleoceanography, 23, PA2203, doi:10.1029/2007PA001515. 1 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.144.3867 http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf |
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ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
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Pacific Sarmiento Southern Ocean |
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Pacific Sarmiento Southern Ocean |
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Southern Ocean |
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Southern Ocean |
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http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.144.3867 http://www.gfdl.noaa.gov/reference/bibliography/2008/km0801.pdf |
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