Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland
Runoff from the Greenland Ice Sheet (GrIS) is thought to enhance marine productivity byadding bioessential iron and silicic acid to coastal waters. However, experimental data suggestnitrate is the main summertime growth-limiting resource in regions affected by meltwateraround Greenland. While meltwa...
Published in: | Nature Communications |
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Language: | English |
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Online Access: | https://www.vliz.be/imisdocs/publications/34/318534.pdf |
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ftnioz:oai:imis.nioz.nl:300521 2023-05-15T16:21:10+02:00 Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland Hopwood, M.J. Carroll, D. Browning, T. J. Meire, L. Mortensen, J. Krisch, S. Achterberg, E.P. 2018 application/pdf https://www.vliz.be/imisdocs/publications/34/318534.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000441518800010 info:eu-repo/semantics/altIdentifier/doi/.org/10.1038/s41467-018-05488-8 https://www.vliz.be/imisdocs/publications/34/318534.pdf info:eu-repo/semantics/openAccess %3Ci%3ENature+Comm.+9%281%29%3C%2Fi%3E%3A+3256.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-018-05488-8%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-018-05488-8%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftnioz https://doi.org/10.1038/s41467-018-05488-8 2023-02-22T23:20:20Z Runoff from the Greenland Ice Sheet (GrIS) is thought to enhance marine productivity byadding bioessential iron and silicic acid to coastal waters. However, experimental data suggestnitrate is the main summertime growth-limiting resource in regions affected by meltwateraround Greenland. While meltwater contains low nitrate concentrations, subglacialdischarge plumes from marine-terminating glaciers entrain large quantities of nitrate fromdeep seawater. Here, we characterize the nitrate fluxes that arise from entrainment ofseawater within these plumes using a subglacial discharge plume model. The upwelled fluxfrom 12 marine-terminating glaciers is estimated to be >1000% of the total nitrate flux fromGrIS discharge. This plume upwelling effect is highly sensitive to the glacier grounding linedepth. For a majority of Greenland’s marine-terminating glaciers nitrate fluxes will diminish asthey retreat. This decline occurs even if discharge volume increases, resulting in a negativeimpact on nitrate availability and thus summertime marine productivity. Article in Journal/Newspaper glacier Greenland Ice Sheet NIOZ Repository (Royal Netherlands Institute for Sea Research) Greenland Nature Communications 9 1 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
language |
English |
description |
Runoff from the Greenland Ice Sheet (GrIS) is thought to enhance marine productivity byadding bioessential iron and silicic acid to coastal waters. However, experimental data suggestnitrate is the main summertime growth-limiting resource in regions affected by meltwateraround Greenland. While meltwater contains low nitrate concentrations, subglacialdischarge plumes from marine-terminating glaciers entrain large quantities of nitrate fromdeep seawater. Here, we characterize the nitrate fluxes that arise from entrainment ofseawater within these plumes using a subglacial discharge plume model. The upwelled fluxfrom 12 marine-terminating glaciers is estimated to be >1000% of the total nitrate flux fromGrIS discharge. This plume upwelling effect is highly sensitive to the glacier grounding linedepth. For a majority of Greenland’s marine-terminating glaciers nitrate fluxes will diminish asthey retreat. This decline occurs even if discharge volume increases, resulting in a negativeimpact on nitrate availability and thus summertime marine productivity. |
format |
Article in Journal/Newspaper |
author |
Hopwood, M.J. Carroll, D. Browning, T. J. Meire, L. Mortensen, J. Krisch, S. Achterberg, E.P. |
spellingShingle |
Hopwood, M.J. Carroll, D. Browning, T. J. Meire, L. Mortensen, J. Krisch, S. Achterberg, E.P. Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
author_facet |
Hopwood, M.J. Carroll, D. Browning, T. J. Meire, L. Mortensen, J. Krisch, S. Achterberg, E.P. |
author_sort |
Hopwood, M.J. |
title |
Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
title_short |
Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
title_full |
Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
title_fullStr |
Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
title_full_unstemmed |
Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland |
title_sort |
non-linear response of summertime marine productivity to increased meltwater discharge around greenland |
publishDate |
2018 |
url |
https://www.vliz.be/imisdocs/publications/34/318534.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
%3Ci%3ENature+Comm.+9%281%29%3C%2Fi%3E%3A+3256.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-018-05488-8%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-018-05488-8%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000441518800010 info:eu-repo/semantics/altIdentifier/doi/.org/10.1038/s41467-018-05488-8 https://www.vliz.be/imisdocs/publications/34/318534.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-018-05488-8 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766009186580168704 |