Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes'
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes'. Abstract: Disruption of the nitrogen cycle is a major component of global environmental change. δ15N in lake sedimen...
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Loughborough University
2018
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ftdatacite:10.17028/rd.lboro.7466993 2023-05-15T16:27:47+02:00 Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' Anderson, Nicholas John C.J. Curtis Whiteford, Erika Jones, Vivienne J. McGowan, Suzanne Simpson, Gavin L. Kaiser, Jan 2018 https://dx.doi.org/10.17028/rd.lboro.7466993 https://repository.lboro.ac.uk/articles/Supplementary_information_files_for_article_Regional_variability_in_the_atmospheric_nitrogen_deposition_signal_and_its_transfer_to_the_sediment_record_in_Greenland_lakes_/7466993 unknown Loughborough University Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 40104 Climate Change Processes FOS Earth and related environmental sciences dataset Dataset 2018 ftdatacite https://doi.org/10.17028/rd.lboro.7466993 2021-11-05T12:55:41Z Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes'. Abstract: Disruption of the nitrogen cycle is a major component of global environmental change. δ15N in lake sediments is increasingly used as a measure of reactive nitrogen input but problematically, the characteristic depleted δ15N signal is not recorded at all sites. We used a regionally replicated sampling strategy along a precipitation and N‐deposition gradient in SW Greenland to assess the factors determining the strength of δ15N signal in lake sediment cores. Analyses of snowpack N and δ15N‐NO3 and water chemistry were coupled with bulk sediment δ15N. Study sites cover a gradient of snowpack δ15N (ice sheet: −6‰; coast urn:x-wiley:00243590:media:lno10936:lno10936-math-000110‰), atmospheric N deposition (ice sheet margin: ∼ 0.2 kg ha−1 yr−1; coast: 0.4 kg ha−1 yr−1) and limnology. Three 210Pb‐dated sediment cores from coastal lakes showed a decline in δ15N of ca. urn:x-wiley:00243590:media:lno10936:lno10936-math-00021‰ from ∼ 1860, reflecting the strongly depleted δ15N of snowpack N, lower in‐lake total N (TN) concentration (∼ 300 μg N L−1) and a higher TN‐load. Coastal lakes have 3.7–7.1× more snowpack input of nitrate than inland sites, while for total deposition the values are 1.7–3.6× greater for lake and whole catchment deposition. At inland sites and lakes close to the ice‐sheet margin, a lower atmospheric N deposition rate and larger in‐lake TN pool resulted in greater reliance on N‐fixation and recycling (mean sediment δ15N is 0.5–2.5‰ in most inland lakes; n = 6). The primary control of the transfer of the atmospheric δ15N deposition signal to lake sediments is the magnitude of external N inputs relative to the in‐lake N‐pool. Dataset Greenland Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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DataCite Metadata Store (German National Library of Science and Technology) |
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unknown |
topic |
40104 Climate Change Processes FOS Earth and related environmental sciences |
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40104 Climate Change Processes FOS Earth and related environmental sciences Anderson, Nicholas John C.J. Curtis Whiteford, Erika Jones, Vivienne J. McGowan, Suzanne Simpson, Gavin L. Kaiser, Jan Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
topic_facet |
40104 Climate Change Processes FOS Earth and related environmental sciences |
description |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes'. Abstract: Disruption of the nitrogen cycle is a major component of global environmental change. δ15N in lake sediments is increasingly used as a measure of reactive nitrogen input but problematically, the characteristic depleted δ15N signal is not recorded at all sites. We used a regionally replicated sampling strategy along a precipitation and N‐deposition gradient in SW Greenland to assess the factors determining the strength of δ15N signal in lake sediment cores. Analyses of snowpack N and δ15N‐NO3 and water chemistry were coupled with bulk sediment δ15N. Study sites cover a gradient of snowpack δ15N (ice sheet: −6‰; coast urn:x-wiley:00243590:media:lno10936:lno10936-math-000110‰), atmospheric N deposition (ice sheet margin: ∼ 0.2 kg ha−1 yr−1; coast: 0.4 kg ha−1 yr−1) and limnology. Three 210Pb‐dated sediment cores from coastal lakes showed a decline in δ15N of ca. urn:x-wiley:00243590:media:lno10936:lno10936-math-00021‰ from ∼ 1860, reflecting the strongly depleted δ15N of snowpack N, lower in‐lake total N (TN) concentration (∼ 300 μg N L−1) and a higher TN‐load. Coastal lakes have 3.7–7.1× more snowpack input of nitrate than inland sites, while for total deposition the values are 1.7–3.6× greater for lake and whole catchment deposition. At inland sites and lakes close to the ice‐sheet margin, a lower atmospheric N deposition rate and larger in‐lake TN pool resulted in greater reliance on N‐fixation and recycling (mean sediment δ15N is 0.5–2.5‰ in most inland lakes; n = 6). The primary control of the transfer of the atmospheric δ15N deposition signal to lake sediments is the magnitude of external N inputs relative to the in‐lake N‐pool. |
format |
Dataset |
author |
Anderson, Nicholas John C.J. Curtis Whiteford, Erika Jones, Vivienne J. McGowan, Suzanne Simpson, Gavin L. Kaiser, Jan |
author_facet |
Anderson, Nicholas John C.J. Curtis Whiteford, Erika Jones, Vivienne J. McGowan, Suzanne Simpson, Gavin L. Kaiser, Jan |
author_sort |
Anderson, Nicholas John |
title |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
title_short |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
title_full |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
title_fullStr |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
title_full_unstemmed |
Supplementary information files for article: 'Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes' |
title_sort |
supplementary information files for article: 'regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in greenland lakes' |
publisher |
Loughborough University |
publishDate |
2018 |
url |
https://dx.doi.org/10.17028/rd.lboro.7466993 https://repository.lboro.ac.uk/articles/Supplementary_information_files_for_article_Regional_variability_in_the_atmospheric_nitrogen_deposition_signal_and_its_transfer_to_the_sediment_record_in_Greenland_lakes_/7466993 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17028/rd.lboro.7466993 |
_version_ |
1766017297389977600 |