Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling
Abstract Here we present Holocene organic carbon, nitrogen, sulphur, carbon isotope ratio and macrofossil data from a small freshwater lake near Sisimiut in south‐west Greenland. The lake was formed c. 11 cal ka BP following retreat of the ice sheet margin and is located above the marine limit in th...
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crwiley:10.1002/jqs.2544 2024-06-23T07:53:18+00:00 Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling Leng, Melanie J. Wagner, Bernd Anderson, N. John Bennike, Ole Woodley, Ewan Kemp, Simon J. 2012 http://dx.doi.org/10.1002/jqs.2544 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2544 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2544 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 27, issue 6, page 575-584 ISSN 0267-8179 1099-1417 journal-article 2012 crwiley https://doi.org/10.1002/jqs.2544 2024-06-04T06:46:44Z Abstract Here we present Holocene organic carbon, nitrogen, sulphur, carbon isotope ratio and macrofossil data from a small freshwater lake near Sisimiut in south‐west Greenland. The lake was formed c. 11 cal ka BP following retreat of the ice sheet margin and is located above the marine limit in this area. The elemental and isotope data suggest a complex deglaciation history of interactions between the lake and its catchment, reflecting glacial retreat and post‐glacial hydrological flushing probably due to periodic melting of local remnant glacial ice and firn areas between 11 and 8.5 cal ka BP. After 8.5 cal ka BP, soil development and associated vegetation processes began to exert a greater control on terrestrial–aquatic carbon cycling. By 5.5 cal ka BP, in the early Neoglacial cooling, the sediment record indicates a change in catchment–lake interactions with consistent δ 13 C while C/N exhibits greater variability. The period after 5.5 cal ka BP is also characterized by higher organic C accumulation in the lake. These changes (total organic carbon, C/N, δ 13 C) are most likely the result of increasing contribution (and burial) of terrestrial organic matter as a result of enhanced soil instability, as indicated by an increase in Cenococcum remains, but also Sphagnum and Empetrum . The impact of glacial retreat and relatively subdued mid‐ to late Holocene climate variation at the coast is in marked contrast to the greater environmental variability seen in inland lakes closer to the present‐day ice sheet margin. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Greenland Ice Sheet Sisimiut Wiley Online Library Greenland Sisimiut ENVELOPE(-53.674,-53.674,66.939,66.939) Journal of Quaternary Science 27 6 575 584 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Here we present Holocene organic carbon, nitrogen, sulphur, carbon isotope ratio and macrofossil data from a small freshwater lake near Sisimiut in south‐west Greenland. The lake was formed c. 11 cal ka BP following retreat of the ice sheet margin and is located above the marine limit in this area. The elemental and isotope data suggest a complex deglaciation history of interactions between the lake and its catchment, reflecting glacial retreat and post‐glacial hydrological flushing probably due to periodic melting of local remnant glacial ice and firn areas between 11 and 8.5 cal ka BP. After 8.5 cal ka BP, soil development and associated vegetation processes began to exert a greater control on terrestrial–aquatic carbon cycling. By 5.5 cal ka BP, in the early Neoglacial cooling, the sediment record indicates a change in catchment–lake interactions with consistent δ 13 C while C/N exhibits greater variability. The period after 5.5 cal ka BP is also characterized by higher organic C accumulation in the lake. These changes (total organic carbon, C/N, δ 13 C) are most likely the result of increasing contribution (and burial) of terrestrial organic matter as a result of enhanced soil instability, as indicated by an increase in Cenococcum remains, but also Sphagnum and Empetrum . The impact of glacial retreat and relatively subdued mid‐ to late Holocene climate variation at the coast is in marked contrast to the greater environmental variability seen in inland lakes closer to the present‐day ice sheet margin. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Leng, Melanie J. Wagner, Bernd Anderson, N. John Bennike, Ole Woodley, Ewan Kemp, Simon J. |
spellingShingle |
Leng, Melanie J. Wagner, Bernd Anderson, N. John Bennike, Ole Woodley, Ewan Kemp, Simon J. Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
author_facet |
Leng, Melanie J. Wagner, Bernd Anderson, N. John Bennike, Ole Woodley, Ewan Kemp, Simon J. |
author_sort |
Leng, Melanie J. |
title |
Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
title_short |
Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
title_full |
Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
title_fullStr |
Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
title_full_unstemmed |
Deglaciation and catchment ontogeny in coastal south‐west Greenland: implications for terrestrial and aquatic carbon cycling |
title_sort |
deglaciation and catchment ontogeny in coastal south‐west greenland: implications for terrestrial and aquatic carbon cycling |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1002/jqs.2544 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2544 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2544 |
long_lat |
ENVELOPE(-53.674,-53.674,66.939,66.939) |
geographic |
Greenland Sisimiut |
geographic_facet |
Greenland Sisimiut |
genre |
Greenland Ice Sheet Sisimiut |
genre_facet |
Greenland Ice Sheet Sisimiut |
op_source |
Journal of Quaternary Science volume 27, issue 6, page 575-584 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.2544 |
container_title |
Journal of Quaternary Science |
container_volume |
27 |
container_issue |
6 |
container_start_page |
575 |
op_container_end_page |
584 |
_version_ |
1802644886278635520 |