Chemical and isotopic switching within the subglacial environment of a High Arctic glacier
Natural environmental isotopes of nitrate, sulphate and inorganic carbon are discussed in conjunction with major ion chemistry of subglacial runoff from a High Arctic glacier, Midre Lovénbreen, Svalbard. The chemical composition of meltwaters is observed to switch in accordance with subglacial hydro...
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ftnerc:oai:nora.nerc.ac.uk:235 2024-06-09T07:42:22+00:00 Chemical and isotopic switching within the subglacial environment of a High Arctic glacier Wynn, Peter M. Hodson, Andrew Heaton, Tim 2006 http://nora.nerc.ac.uk/id/eprint/235/ http://www.ingentaconnect.com/content/klu/biog/2006/00000078/00000002/00003832 unknown Springer Wynn, Peter M.; Hodson, Andrew; Heaton, Tim. 2006 Chemical and isotopic switching within the subglacial environment of a High Arctic glacier. Biogeochemistry, 78 (2). 173-193. https://doi.org/10.1007/s10533-005-3832-0 <https://doi.org/10.1007/s10533-005-3832-0> Earth Sciences Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1007/s10533-005-3832-0 2024-05-15T08:39:04Z Natural environmental isotopes of nitrate, sulphate and inorganic carbon are discussed in conjunction with major ion chemistry of subglacial runoff from a High Arctic glacier, Midre Lovénbreen, Svalbard. The chemical composition of meltwaters is observed to switch in accordance with subglacial hydrological evolution and redox status. Changing rapidly from reducing to oxidizing conditions, subglacial waters also depict that 15N/14N values show microbial denitrification is an active component of nutrient cycling beneath the glacier. 18O/16O ratios of sulphate are used to elucidate mechanisms of biological and abiological sulphide oxidation. Concentrations of bicarbonate appear to be governed largely by the degree of rock: water contact encountered in the subglacial system, rather than the switch in redox status, although the potential for microbiological activity to influence ambient bicarbonate concentrations is recognised. Glaciers are therefore highlighted as cryospheric ecosystems supporting microbial life which directly impacts upon the release of solute through biogeochemically mediated processes. Article in Journal/Newspaper Arctic Arctic glacier Svalbard Natural Environment Research Council: NERC Open Research Archive Arctic Svalbard Biogeochemistry 78 2 173 193 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Wynn, Peter M. Hodson, Andrew Heaton, Tim Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
topic_facet |
Earth Sciences |
description |
Natural environmental isotopes of nitrate, sulphate and inorganic carbon are discussed in conjunction with major ion chemistry of subglacial runoff from a High Arctic glacier, Midre Lovénbreen, Svalbard. The chemical composition of meltwaters is observed to switch in accordance with subglacial hydrological evolution and redox status. Changing rapidly from reducing to oxidizing conditions, subglacial waters also depict that 15N/14N values show microbial denitrification is an active component of nutrient cycling beneath the glacier. 18O/16O ratios of sulphate are used to elucidate mechanisms of biological and abiological sulphide oxidation. Concentrations of bicarbonate appear to be governed largely by the degree of rock: water contact encountered in the subglacial system, rather than the switch in redox status, although the potential for microbiological activity to influence ambient bicarbonate concentrations is recognised. Glaciers are therefore highlighted as cryospheric ecosystems supporting microbial life which directly impacts upon the release of solute through biogeochemically mediated processes. |
format |
Article in Journal/Newspaper |
author |
Wynn, Peter M. Hodson, Andrew Heaton, Tim |
author_facet |
Wynn, Peter M. Hodson, Andrew Heaton, Tim |
author_sort |
Wynn, Peter M. |
title |
Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
title_short |
Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
title_full |
Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
title_fullStr |
Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
title_full_unstemmed |
Chemical and isotopic switching within the subglacial environment of a High Arctic glacier |
title_sort |
chemical and isotopic switching within the subglacial environment of a high arctic glacier |
publisher |
Springer |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/235/ http://www.ingentaconnect.com/content/klu/biog/2006/00000078/00000002/00003832 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic glacier Svalbard |
genre_facet |
Arctic Arctic glacier Svalbard |
op_relation |
Wynn, Peter M.; Hodson, Andrew; Heaton, Tim. 2006 Chemical and isotopic switching within the subglacial environment of a High Arctic glacier. Biogeochemistry, 78 (2). 173-193. https://doi.org/10.1007/s10533-005-3832-0 <https://doi.org/10.1007/s10533-005-3832-0> |
op_doi |
https://doi.org/10.1007/s10533-005-3832-0 |
container_title |
Biogeochemistry |
container_volume |
78 |
container_issue |
2 |
container_start_page |
173 |
op_container_end_page |
193 |
_version_ |
1801371274395516928 |