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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ftloughboroughun:oai:figshare.com:article/7466993 2023-05-15T16:27:04+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' Nicholas John Anderson C.J. Curtis Erika Whiteford Vivienne J. Jones Suzanne McGowan Gavin L. Simpson Jan Kaiser 2018-12-17T10:00:38Z https://doi.org/10.17028/rd.lboro.7466993.v1 https://figshare.com/articles/dataset/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 doi:10.17028/rd.lboro.7466993.v1 https://figshare.com/articles/dataset/Supplementary_information_files_for_article_Regional_variability_in_the_atmospheric_nitrogen_deposition_signal_and_its_transfer_to_the_sediment_record_in_Greenland_lakes_/7466993 CC BY 4.0 CC-BY Climate Change Processes Nitrogen Greenland Limnology Dataset 2018 ftloughboroughun https://doi.org/10.17028/rd.lboro.7466993.v1 2022-01-01T19:37:58Z 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 Loughborough University: Figshare Greenland |
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Open Polar |
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Loughborough University: Figshare |
op_collection_id |
ftloughboroughun |
language |
unknown |
topic |
Climate Change Processes Nitrogen Greenland Limnology |
spellingShingle |
Climate Change Processes Nitrogen Greenland Limnology Nicholas John Anderson C.J. Curtis Erika Whiteford Vivienne J. Jones Suzanne McGowan Gavin L. Simpson Jan Kaiser 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 |
Climate Change Processes Nitrogen Greenland Limnology |
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 |
Nicholas John Anderson C.J. Curtis Erika Whiteford Vivienne J. Jones Suzanne McGowan Gavin L. Simpson Jan Kaiser |
author_facet |
Nicholas John Anderson C.J. Curtis Erika Whiteford Vivienne J. Jones Suzanne McGowan Gavin L. Simpson Jan Kaiser |
author_sort |
Nicholas John Anderson |
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' |
publishDate |
2018 |
url |
https://doi.org/10.17028/rd.lboro.7466993.v1 https://figshare.com/articles/dataset/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_relation |
doi:10.17028/rd.lboro.7466993.v1 https://figshare.com/articles/dataset/Supplementary_information_files_for_article_Regional_variability_in_the_atmospheric_nitrogen_deposition_signal_and_its_transfer_to_the_sediment_record_in_Greenland_lakes_/7466993 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17028/rd.lboro.7466993.v1 |
_version_ |
1766016127238930432 |