The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet
Glacial meltwater runoff is likely an important source of limiting nutrients for downstream primary producers. This has particular significance for regions surrounding the Greenland Ice Sheet, which discharges >400 km3 of meltwater annually. The Arctic is warming rapidly but the impact of higher...
Published in: | Geochemical Perspectives Letters |
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Language: | English |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/5f4bfec7-e4a9-449e-9e4c-d919488fd6c0 2024-01-28T10:03:55+01:00 The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet Hawkings, Jon Wadham, Jemma Tranter, Martyn Lawson, Emily Sole, Andrew Cowton, Tom Tedstone, Andrew Bartholomew, Ian Nienow, Peter Chandler, David Telling, Jon 2015-06 https://pure.au.dk/portal/en/publications/5f4bfec7-e4a9-449e-9e4c-d919488fd6c0 https://doi.org/10.7185/geochemlet.1510 eng eng https://pure.au.dk/portal/en/publications/5f4bfec7-e4a9-449e-9e4c-d919488fd6c0 info:eu-repo/semantics/restrictedAccess Hawkings , J , Wadham , J , Tranter , M , Lawson , E , Sole , A , Cowton , T , Tedstone , A , Bartholomew , I , Nienow , P , Chandler , D & Telling , J 2015 , ' The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet ' , Geochemical Perspectives Letters , vol. 1 , no. 1 , pp. 94-104 . https://doi.org/10.7185/geochemlet.1510 Glaciers Greenland Ice Sheet Chemical weathering Nutrients nutrient export nutrient cycling silica Phosphorus Nitrogen Climate change article 2015 ftuniaarhuspubl https://doi.org/10.7185/geochemlet.1510 2024-01-04T00:00:25Z Glacial meltwater runoff is likely an important source of limiting nutrients for downstream primary producers. This has particular significance for regions surrounding the Greenland Ice Sheet, which discharges >400 km3 of meltwater annually. The Arctic is warming rapidly but the impact of higher discharge on nutrient export is unknown. We present four years of hydrological and geochemical data from a large Greenland Ice Sheet catchment that includes the two highest melt years on record (2010, 2012). Measurements reveal significant variation in dissolved solute (major ion) and estimated dissolved macronutrient (nitrogen, phosphorus and silica) fluxes, with increases in higher melt years. Labile particulate macronutrients dominate nutrient export, accounting for ~50 % of nitrogen and >80 % of both phosphorus and silica. The response of ice sheet nutrient export to enhanced melting is largely controlled by particle bound nutrients, the future supply of which is uncertain. We propose that the Greenland Ice Sheet provides an underappreciated and annually dynamic source of nutrients for the polar oceans, with changes in meltwater discharge likely to impact marine primary productivity in future decades. Article in Journal/Newspaper Arctic Climate change Greenland Ice Sheet Aarhus University: Research Arctic Greenland Geochemical Perspectives Letters 94 104 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Glaciers Greenland Ice Sheet Chemical weathering Nutrients nutrient export nutrient cycling silica Phosphorus Nitrogen Climate change |
spellingShingle |
Glaciers Greenland Ice Sheet Chemical weathering Nutrients nutrient export nutrient cycling silica Phosphorus Nitrogen Climate change Hawkings, Jon Wadham, Jemma Tranter, Martyn Lawson, Emily Sole, Andrew Cowton, Tom Tedstone, Andrew Bartholomew, Ian Nienow, Peter Chandler, David Telling, Jon The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
topic_facet |
Glaciers Greenland Ice Sheet Chemical weathering Nutrients nutrient export nutrient cycling silica Phosphorus Nitrogen Climate change |
description |
Glacial meltwater runoff is likely an important source of limiting nutrients for downstream primary producers. This has particular significance for regions surrounding the Greenland Ice Sheet, which discharges >400 km3 of meltwater annually. The Arctic is warming rapidly but the impact of higher discharge on nutrient export is unknown. We present four years of hydrological and geochemical data from a large Greenland Ice Sheet catchment that includes the two highest melt years on record (2010, 2012). Measurements reveal significant variation in dissolved solute (major ion) and estimated dissolved macronutrient (nitrogen, phosphorus and silica) fluxes, with increases in higher melt years. Labile particulate macronutrients dominate nutrient export, accounting for ~50 % of nitrogen and >80 % of both phosphorus and silica. The response of ice sheet nutrient export to enhanced melting is largely controlled by particle bound nutrients, the future supply of which is uncertain. We propose that the Greenland Ice Sheet provides an underappreciated and annually dynamic source of nutrients for the polar oceans, with changes in meltwater discharge likely to impact marine primary productivity in future decades. |
format |
Article in Journal/Newspaper |
author |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Lawson, Emily Sole, Andrew Cowton, Tom Tedstone, Andrew Bartholomew, Ian Nienow, Peter Chandler, David Telling, Jon |
author_facet |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Lawson, Emily Sole, Andrew Cowton, Tom Tedstone, Andrew Bartholomew, Ian Nienow, Peter Chandler, David Telling, Jon |
author_sort |
Hawkings, Jon |
title |
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
title_short |
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
title_full |
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
title_fullStr |
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
title_full_unstemmed |
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet |
title_sort |
effect of warming climate on nutrient and solute export from the greenland ice sheet |
publishDate |
2015 |
url |
https://pure.au.dk/portal/en/publications/5f4bfec7-e4a9-449e-9e4c-d919488fd6c0 https://doi.org/10.7185/geochemlet.1510 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Ice Sheet |
genre_facet |
Arctic Climate change Greenland Ice Sheet |
op_source |
Hawkings , J , Wadham , J , Tranter , M , Lawson , E , Sole , A , Cowton , T , Tedstone , A , Bartholomew , I , Nienow , P , Chandler , D & Telling , J 2015 , ' The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet ' , Geochemical Perspectives Letters , vol. 1 , no. 1 , pp. 94-104 . https://doi.org/10.7185/geochemlet.1510 |
op_relation |
https://pure.au.dk/portal/en/publications/5f4bfec7-e4a9-449e-9e4c-d919488fd6c0 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.7185/geochemlet.1510 |
container_title |
Geochemical Perspectives Letters |
container_start_page |
94 |
op_container_end_page |
104 |
_version_ |
1789329492578140160 |