Aluminium in glacial meltwater demonstrates an association with nutrient export (Werenskiöldbreen, Svalbard)
Abstrakt
The aluminium (Al) cycle in glacierised basins has not received a great deal of attention in studies of biogeochemical cycles. As Almay be toxic for biota, it is important to investigate the processes leading to its release into the environment. It has not yet been ascertained whether filterable Al (passing through a pore size of 0.45 m) is incorporated into biogeochemical cycles in glacierised basins. Our study aims to determine the relationship between the processes bringing filterable Al and glacier-derived filterable nutrients (particularly Fe and Si) into glacierised basins. We investigated theWerenskiöldbreen basin (44.1 km2, 60% glacierised) situated in SWSpitsbergen, Svalbard. In 2011, we collected meltwater from a subglacial portal at the glacier front and at a downstream hydrometric station throughout the ablation season. The Al concentration, unchanged between the subglacial system and proglacial zone, reveals that aluminosilicate weathering is a dominant source of filterable Al under subglacial conditions. By examining the Al:Fe ratio compared with pH and the sulphate mass fraction index, we found that the proton source for subglacial aluminosilicate weathering ismainly associatedwith sulphide oxidation and, to a lesser degree, with hydrolysis and carbonation. In subglacial outflows and in the glacial river, Al and Fe are primarily in the forms of Al(OH)4 - and Fe(OH)3. The annual filterable Al yield (2.7 mmolm-2)was of amagnitude similar to that of nutrients such as filterable Fe (3.0 mmolm-2) and lower than that of dissolved Si (18.5 mmolm-2). Our results show that filterable Al concentrations in meltwater are significantly correlated to filterable and dissolved glacier-derived nutrients (Fe and Si, respectively) concentrations in glaciers worldwide. We conclude that a potential bioavailable Al pool derived from glacierised basins may be incorporated in biogeochemical cycles, as it is strongly related to the concentrations and yields of glacier-derived nutrients.
Cytowania
-
1 5
CrossRef
-
0
Web of Science
-
1 7
Scopus
Autorzy (6)
Cytuj jako
Pełna treść
pełna treść publikacji nie jest dostępna w portalu
Słowa kluczowe
Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
-
HYDROLOGICAL PROCESSES
nr 33,
strony 1638 - 1657,
ISSN: 0885-6087 - Język:
- angielski
- Rok wydania:
- 2019
- Opis bibliograficzny:
- Stachnik Ł., Yde J., Nawrot A., Uzarowicz Ł., Łepkowska E., Kozak K.: Aluminium in glacial meltwater demonstrates an association with nutrient export (Werenskiöldbreen, Svalbard)// HYDROLOGICAL PROCESSES -Vol. 33,iss. 12 (2019), s.1638-1657
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1002/hyp.13426
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 119 razy
Publikacje, które mogą cię zainteresować
Effects of biotransport and hydro-meteorological conditions on transport of trace elements in the Scott River (Bellsund, Spitsbergen)
- S. Lehmann-konera,
- W. Kociuba,
- S. Chmiel
- + 2 autorów
Chemical denudation and the role of sulfide oxidation at Werenskioldbreen, Svalbard
- Ł. Stachnik,
- E. Majchrowska,
- J. C. Yde
- + 4 autorów