Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes
Lakes are a key feature of arctic landscapes and can be an important component of regional organic carbon (OC) budgets, but C burial rates are not well estimated. 210 Pb-dated sediment cores and carbon and organic matter (as loss-on-ignition) content were used to estimate OC burial for 16 lakes in S...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10074859 2023-12-24T10:14:08+01:00 Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes Anderson, NJ Appleby, PG Bindler, R Renberg, I Conley, DJ Fritz, SC Jones, VJ Whiteford, EJ Yang, H 2019-04-29 text https://discovery.ucl.ac.uk/id/eprint/10074859/1/Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf https://discovery.ucl.ac.uk/id/eprint/10074859/ eng eng https://discovery.ucl.ac.uk/id/eprint/10074859/1/Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf https://discovery.ucl.ac.uk/id/eprint/10074859/ open Ecosystems (2019) Nitrogen arctic diatoms tundra biogenic silica DOC soil carbon Article 2019 ftucl 2023-11-27T13:07:32Z Lakes are a key feature of arctic landscapes and can be an important component of regional organic carbon (OC) budgets, but C burial rates are not well estimated. 210 Pb-dated sediment cores and carbon and organic matter (as loss-on-ignition) content were used to estimate OC burial for 16 lakes in SW Greenland. Burial rates were corrected for sediment focusing using the 210 Pb flux method. The study lakes span a range of water chemistries (conductivity range 25–3400 µS cm −1 ), areas (< 4–100 ha) and maximum depths (~ 10–50 m). The regional average focusing-corrected OC accumulation rate was ~ 2 g C m −2 y −1 prior to ~ 1950 and 3.6 g C m −2 y −1 after 1950. Among-lake variability in post-1950 OC AR was correlated with in-lake dissolved organic carbon concentration, conductivity, altitude and location along the fjord. Twelve lakes showed an increase in mean OC AR over the analyzed time period, ~ 1880–2000; as the study area was cooling until recently, this increase is probably attributable to other global change processes, for example, altered inputs of N or P. There are ~ 20,000 lakes in the study area ranging from ~ 1 ha to more than 130 km 2 , although over 83% of lakes are less than 10 ha. Extrapolating the mean post-1950 OC AR (3.6 g C m −2 y −1 ) to all lakes larger than 1000 ha and applying a lower rate of ~ 2 g C m −2 y −1 to large lakes (> 1000 ha) suggests a regional annual lake OC burial rate of ~ 10.14 × 10 9 g C y −1 post 1950. Given the low C content of soils in this area, lakes represent a substantial regional C store. Article in Journal/Newspaper Arctic Greenland Tundra University College London: UCL Discovery Arctic Greenland |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Nitrogen arctic diatoms tundra biogenic silica DOC soil carbon |
spellingShingle |
Nitrogen arctic diatoms tundra biogenic silica DOC soil carbon Anderson, NJ Appleby, PG Bindler, R Renberg, I Conley, DJ Fritz, SC Jones, VJ Whiteford, EJ Yang, H Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
topic_facet |
Nitrogen arctic diatoms tundra biogenic silica DOC soil carbon |
description |
Lakes are a key feature of arctic landscapes and can be an important component of regional organic carbon (OC) budgets, but C burial rates are not well estimated. 210 Pb-dated sediment cores and carbon and organic matter (as loss-on-ignition) content were used to estimate OC burial for 16 lakes in SW Greenland. Burial rates were corrected for sediment focusing using the 210 Pb flux method. The study lakes span a range of water chemistries (conductivity range 25–3400 µS cm −1 ), areas (< 4–100 ha) and maximum depths (~ 10–50 m). The regional average focusing-corrected OC accumulation rate was ~ 2 g C m −2 y −1 prior to ~ 1950 and 3.6 g C m −2 y −1 after 1950. Among-lake variability in post-1950 OC AR was correlated with in-lake dissolved organic carbon concentration, conductivity, altitude and location along the fjord. Twelve lakes showed an increase in mean OC AR over the analyzed time period, ~ 1880–2000; as the study area was cooling until recently, this increase is probably attributable to other global change processes, for example, altered inputs of N or P. There are ~ 20,000 lakes in the study area ranging from ~ 1 ha to more than 130 km 2 , although over 83% of lakes are less than 10 ha. Extrapolating the mean post-1950 OC AR (3.6 g C m −2 y −1 ) to all lakes larger than 1000 ha and applying a lower rate of ~ 2 g C m −2 y −1 to large lakes (> 1000 ha) suggests a regional annual lake OC burial rate of ~ 10.14 × 10 9 g C y −1 post 1950. Given the low C content of soils in this area, lakes represent a substantial regional C store. |
format |
Article in Journal/Newspaper |
author |
Anderson, NJ Appleby, PG Bindler, R Renberg, I Conley, DJ Fritz, SC Jones, VJ Whiteford, EJ Yang, H |
author_facet |
Anderson, NJ Appleby, PG Bindler, R Renberg, I Conley, DJ Fritz, SC Jones, VJ Whiteford, EJ Yang, H |
author_sort |
Anderson, NJ |
title |
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
title_short |
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
title_full |
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
title_fullStr |
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
title_full_unstemmed |
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes |
title_sort |
landscape-scale variability of organic carbon burial by sw greenland lakes |
publishDate |
2019 |
url |
https://discovery.ucl.ac.uk/id/eprint/10074859/1/Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf https://discovery.ucl.ac.uk/id/eprint/10074859/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Tundra |
genre_facet |
Arctic Greenland Tundra |
op_source |
Ecosystems (2019) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10074859/1/Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf https://discovery.ucl.ac.uk/id/eprint/10074859/ |
op_rights |
open |
_version_ |
1786189829943328768 |