The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic
The contribution of ice sheets to the global biogeochemical cycle of phosphorus is largely unknown, due to the lack of field data. Here we present the first comprehensive study of phosphorus export from two Greenland Ice Sheet glaciers. Our results indicate that the ice sheet is a hot spot of phosph...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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ftnerc:oai:nora.nerc.ac.uk:512886 2023-05-15T14:26:44+02:00 The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic Hawkings, Jon Wadham, Jemma Tranter, Martyn Telling, Jon Bagshaw, Elizabeth Beaton, Alexander Simmons, Sarah-Louise Chandler, David Tedstone, Andrew Nienow, Peter 2016-02 text http://nora.nerc.ac.uk/id/eprint/512886/ https://nora.nerc.ac.uk/id/eprint/512886/1/Hawkings_et_al-2016-Global_Biogeochemical_Cycles.pdf https://doi.org/10.1002/2015GB005237 en eng https://nora.nerc.ac.uk/id/eprint/512886/1/Hawkings_et_al-2016-Global_Biogeochemical_Cycles.pdf Hawkings, Jon; Wadham, Jemma; Tranter, Martyn; Telling, Jon; Bagshaw, Elizabeth; Beaton, Alexander; Simmons, Sarah-Louise; Chandler, David; Tedstone, Andrew; Nienow, Peter. 2016 The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic. Global Biogeochemical Cycles, 30 (2). 191-210. https://doi.org/10.1002/2015GB005237 <https://doi.org/10.1002/2015GB005237> cc_by_4 CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2015GB005237 2023-02-04T19:42:39Z The contribution of ice sheets to the global biogeochemical cycle of phosphorus is largely unknown, due to the lack of field data. Here we present the first comprehensive study of phosphorus export from two Greenland Ice Sheet glaciers. Our results indicate that the ice sheet is a hot spot of phosphorus export in the Arctic. Soluble reactive phosphorus (SRP) concentrations, up to 0.35 µM, are similar to those observed in Arctic rivers. Yields of SRP are among the highest in the literature, with denudation rates of 17–27 kg P km−2 yr−1. Particulate phases, as with nonglaciated catchments, dominate phosphorus export (>97% of total phosphorus flux). The labile particulate fraction differs between the two glaciers studied, with significantly higher yields found at the larger glacier (57.3 versus 8.3 kg P km−2 yr−1). Total phosphorus yields are an order of magnitude higher than riverine values reported in the literature. We estimate that the ice sheet contributes ~15% of total bioavailable phosphorus input to the Arctic oceans (~11 Gg yr−1) and dominates total phosphorus input (408 Gg yr−1), which is more than 3 times that estimated from Arctic rivers (126 Gg yr−1). We predict that these fluxes will rise with increasing ice sheet freshwater discharge in the future. Article in Journal/Newspaper Arctic Arctic glacier Greenland Ice Sheet Natural Environment Research Council: NERC Open Research Archive Arctic Greenland Global Biogeochemical Cycles 30 2 191 210 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The contribution of ice sheets to the global biogeochemical cycle of phosphorus is largely unknown, due to the lack of field data. Here we present the first comprehensive study of phosphorus export from two Greenland Ice Sheet glaciers. Our results indicate that the ice sheet is a hot spot of phosphorus export in the Arctic. Soluble reactive phosphorus (SRP) concentrations, up to 0.35 µM, are similar to those observed in Arctic rivers. Yields of SRP are among the highest in the literature, with denudation rates of 17–27 kg P km−2 yr−1. Particulate phases, as with nonglaciated catchments, dominate phosphorus export (>97% of total phosphorus flux). The labile particulate fraction differs between the two glaciers studied, with significantly higher yields found at the larger glacier (57.3 versus 8.3 kg P km−2 yr−1). Total phosphorus yields are an order of magnitude higher than riverine values reported in the literature. We estimate that the ice sheet contributes ~15% of total bioavailable phosphorus input to the Arctic oceans (~11 Gg yr−1) and dominates total phosphorus input (408 Gg yr−1), which is more than 3 times that estimated from Arctic rivers (126 Gg yr−1). We predict that these fluxes will rise with increasing ice sheet freshwater discharge in the future. |
format |
Article in Journal/Newspaper |
author |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Telling, Jon Bagshaw, Elizabeth Beaton, Alexander Simmons, Sarah-Louise Chandler, David Tedstone, Andrew Nienow, Peter |
spellingShingle |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Telling, Jon Bagshaw, Elizabeth Beaton, Alexander Simmons, Sarah-Louise Chandler, David Tedstone, Andrew Nienow, Peter The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
author_facet |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Telling, Jon Bagshaw, Elizabeth Beaton, Alexander Simmons, Sarah-Louise Chandler, David Tedstone, Andrew Nienow, Peter |
author_sort |
Hawkings, Jon |
title |
The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
title_short |
The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
title_full |
The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
title_fullStr |
The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
title_full_unstemmed |
The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic |
title_sort |
greenland ice sheet as a hot spot of phosphorus weathering and export in the arctic |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/512886/ https://nora.nerc.ac.uk/id/eprint/512886/1/Hawkings_et_al-2016-Global_Biogeochemical_Cycles.pdf https://doi.org/10.1002/2015GB005237 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic glacier Greenland Ice Sheet |
genre_facet |
Arctic Arctic glacier Greenland Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/512886/1/Hawkings_et_al-2016-Global_Biogeochemical_Cycles.pdf Hawkings, Jon; Wadham, Jemma; Tranter, Martyn; Telling, Jon; Bagshaw, Elizabeth; Beaton, Alexander; Simmons, Sarah-Louise; Chandler, David; Tedstone, Andrew; Nienow, Peter. 2016 The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic. Global Biogeochemical Cycles, 30 (2). 191-210. https://doi.org/10.1002/2015GB005237 <https://doi.org/10.1002/2015GB005237> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2015GB005237 |
container_title |
Global Biogeochemical Cycles |
container_volume |
30 |
container_issue |
2 |
container_start_page |
191 |
op_container_end_page |
210 |
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1766300151969742848 |