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Ice sheets as a missing source of silica to the polar oceans

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Ice sheets as a missing source of silica to the polar oceans. / Hawkings, Jon R.; Wadham, Jemma L.; Benning, Liane G.; Hendry, Katharine R.; Tranter, Martyn; Tedstone, Andrew; Nienow, Peter; Raiswell, Rob.

In: Nature Communications, Vol. 8, 14198, 25.01.2017.

Research output: Contribution to journalArticle

Harvard

Hawkings, JR, Wadham, JL, Benning, LG, Hendry, KR, Tranter, M, Tedstone, A, Nienow, P & Raiswell, R 2017, 'Ice sheets as a missing source of silica to the polar oceans', Nature Communications, vol. 8, 14198. https://doi.org/10.1038/ncomms14198

APA

Hawkings, J. R., Wadham, J. L., Benning, L. G., Hendry, K. R., Tranter, M., Tedstone, A., ... Raiswell, R. (2017). Ice sheets as a missing source of silica to the polar oceans. Nature Communications, 8, [14198]. https://doi.org/10.1038/ncomms14198

Vancouver

Hawkings JR, Wadham JL, Benning LG, Hendry KR, Tranter M, Tedstone A et al. Ice sheets as a missing source of silica to the polar oceans. Nature Communications. 2017 Jan 25;8. 14198. https://doi.org/10.1038/ncomms14198

Author

Hawkings, Jon R. ; Wadham, Jemma L. ; Benning, Liane G. ; Hendry, Katharine R. ; Tranter, Martyn ; Tedstone, Andrew ; Nienow, Peter ; Raiswell, Rob. / Ice sheets as a missing source of silica to the polar oceans. In: Nature Communications. 2017 ; Vol. 8.

Bibtex

@article{aa2bab05877145f6a8f7e514500bf029,
title = "Ice sheets as a missing source of silica to the polar oceans",
abstract = "Ice sheets play a more important role in the global silicon cycle than previously appreciated. Input of dissolved and amorphous particulate silica into natural waters stimulates the growth of diatoms. Here we measure dissolved and amorphous silica in Greenland Ice Sheet meltwaters and icebergs, demonstrating the potential for high ice sheet export. Our dissolved and amorphous silica flux is 0.20 (0.06-0.79) Tmol year-1, ∼50{\%} of the input from Arctic rivers. Amorphous silica comprises >95{\%} of this flux and is highly soluble in sea water, as indicated by a significant increase in dissolved silica across a fjord salinity gradient. Retreating palaeo ice sheets were therefore likely responsible for high dissolved and amorphous silica fluxes into the ocean during the last deglaciation, reaching values of ∼5.5 Tmol year-1, similar to the estimated export from palaeo rivers. These elevated silica fluxes may explain high diatom productivity observed during the last glacial-interglacial period.",
author = "Hawkings, {Jon R.} and Wadham, {Jemma L.} and Benning, {Liane G.} and Hendry, {Katharine R.} and Martyn Tranter and Andrew Tedstone and Peter Nienow and Rob Raiswell",
year = "2017",
month = "1",
day = "25",
doi = "10.1038/ncomms14198",
language = "English",
volume = "8",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Springer Nature",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Ice sheets as a missing source of silica to the polar oceans

AU - Hawkings, Jon R.

AU - Wadham, Jemma L.

AU - Benning, Liane G.

AU - Hendry, Katharine R.

AU - Tranter, Martyn

AU - Tedstone, Andrew

AU - Nienow, Peter

AU - Raiswell, Rob

PY - 2017/1/25

Y1 - 2017/1/25

N2 - Ice sheets play a more important role in the global silicon cycle than previously appreciated. Input of dissolved and amorphous particulate silica into natural waters stimulates the growth of diatoms. Here we measure dissolved and amorphous silica in Greenland Ice Sheet meltwaters and icebergs, demonstrating the potential for high ice sheet export. Our dissolved and amorphous silica flux is 0.20 (0.06-0.79) Tmol year-1, ∼50% of the input from Arctic rivers. Amorphous silica comprises >95% of this flux and is highly soluble in sea water, as indicated by a significant increase in dissolved silica across a fjord salinity gradient. Retreating palaeo ice sheets were therefore likely responsible for high dissolved and amorphous silica fluxes into the ocean during the last deglaciation, reaching values of ∼5.5 Tmol year-1, similar to the estimated export from palaeo rivers. These elevated silica fluxes may explain high diatom productivity observed during the last glacial-interglacial period.

AB - Ice sheets play a more important role in the global silicon cycle than previously appreciated. Input of dissolved and amorphous particulate silica into natural waters stimulates the growth of diatoms. Here we measure dissolved and amorphous silica in Greenland Ice Sheet meltwaters and icebergs, demonstrating the potential for high ice sheet export. Our dissolved and amorphous silica flux is 0.20 (0.06-0.79) Tmol year-1, ∼50% of the input from Arctic rivers. Amorphous silica comprises >95% of this flux and is highly soluble in sea water, as indicated by a significant increase in dissolved silica across a fjord salinity gradient. Retreating palaeo ice sheets were therefore likely responsible for high dissolved and amorphous silica fluxes into the ocean during the last deglaciation, reaching values of ∼5.5 Tmol year-1, similar to the estimated export from palaeo rivers. These elevated silica fluxes may explain high diatom productivity observed during the last glacial-interglacial period.

UR - http://www.scopus.com/inward/record.url?scp=85010715387&partnerID=8YFLogxK

U2 - 10.1038/ncomms14198

DO - 10.1038/ncomms14198

M3 - Article

VL - 8

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 14198

ER -