The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating.
At this moment there is a gap in information regarding the affect roots might have on 210Pb distribution in peat cores and in turn the obtained chronologies by 210Pb dating. Therefore, four peat cores were collected from the snow manipulation study site within the mire complex Storflaket (68°20048″N...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2020
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ftsprs:oai:DiVA.org:polar-8540 2023-05-15T17:57:23+02:00 The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. Spjut, Nora 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8540 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8540 info:eu-repo/semantics/openAccess Permafrost thaw 210Pb dating and Dwarf shrub roots Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Student thesis info:eu-repo/semantics/bachelorThesis text 2020 ftsprs 2022-07-10T16:16:53Z At this moment there is a gap in information regarding the affect roots might have on 210Pb distribution in peat cores and in turn the obtained chronologies by 210Pb dating. Therefore, four peat cores were collected from the snow manipulation study site within the mire complex Storflaket (68°20048″N, 18°58016″E). Two cores from snow fence plots, which has experienced root growth due to permafrost thaw, and 2 cores from control plots. 210Pb distribution and the provided 210Pb chronologies were then compared with root content within and between the cores. In two of the cores (C5 and SF2) did subsurface peaks in the 210Pb activity profile follow the distribution profile of the dwarf shrub roots. The same pattern was not seen with Eriophorum roots. This indicates that presence of dwarf root with their shallow and horizontally growth can affect the 210Pb profile by horizontal translocation of 210Pb. The chronologies obtained by the CF:CS and CRS dating models could not be validated for the C5 core which suggest that dwarf shrub roots also can affect the 21oPb dating. Bachelor Thesis permafrost Swedish Polar Research Secretariat: Swedish Polar Bibliography (DiVA) |
institution |
Open Polar |
collection |
Swedish Polar Research Secretariat: Swedish Polar Bibliography (DiVA) |
op_collection_id |
ftsprs |
language |
English |
topic |
Permafrost thaw 210Pb dating and Dwarf shrub roots Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
spellingShingle |
Permafrost thaw 210Pb dating and Dwarf shrub roots Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Spjut, Nora The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
topic_facet |
Permafrost thaw 210Pb dating and Dwarf shrub roots Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
description |
At this moment there is a gap in information regarding the affect roots might have on 210Pb distribution in peat cores and in turn the obtained chronologies by 210Pb dating. Therefore, four peat cores were collected from the snow manipulation study site within the mire complex Storflaket (68°20048″N, 18°58016″E). Two cores from snow fence plots, which has experienced root growth due to permafrost thaw, and 2 cores from control plots. 210Pb distribution and the provided 210Pb chronologies were then compared with root content within and between the cores. In two of the cores (C5 and SF2) did subsurface peaks in the 210Pb activity profile follow the distribution profile of the dwarf shrub roots. The same pattern was not seen with Eriophorum roots. This indicates that presence of dwarf root with their shallow and horizontally growth can affect the 210Pb profile by horizontal translocation of 210Pb. The chronologies obtained by the CF:CS and CRS dating models could not be validated for the C5 core which suggest that dwarf shrub roots also can affect the 21oPb dating. |
format |
Bachelor Thesis |
author |
Spjut, Nora |
author_facet |
Spjut, Nora |
author_sort |
Spjut, Nora |
title |
The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
title_short |
The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
title_full |
The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
title_fullStr |
The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
title_full_unstemmed |
The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating. |
title_sort |
potential disturbance of the 210pb profile in peat cores by roots and the implications for 210pb dating. |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8540 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8540 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766165791688884224 |