Titre
The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet
Type
article
Institution
Externe
Périodique
Auteur(s)
Hawkings, J.R.
Auteure/Auteur
Wadham, J.L.
Auteure/Auteur
Tranter, M.
Auteure/Auteur
Lawson, E.
Auteure/Auteur
Sole, A.
Auteure/Auteur
Cowton, T.
Auteure/Auteur
Tedstone, A.J.
Auteure/Auteur
Bartholomew, I.
Auteure/Auteur
Nienow, P.
Auteure/Auteur
Chandler, D.
Auteure/Auteur
Telling, J.
Auteure/Auteur
Liens vers les personnes
ISSN
2410-339X
Statut éditorial
Publié
Date de publication
2015
Première page
94
Dernière page/numéro d’article
104
Peer-reviewed
Oui
Langue
anglais
Résumé
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.
PID Serval
serval:BIB_99B5540D5622
Open Access
Oui
Date de création
2024-08-29T09:03:55.448Z
Date de création dans IRIS
2025-05-21T00:45:25Z
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Nom
GPL1510_noSI.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by-nc-nd/4.0
Taille
2.32 MB
Format
Adobe PDF
PID Serval
serval:BIB_99B5540D5622.P001
Somme de contrôle
(MD5):1aa2eb96d6200674f5bde84a6b9be655