UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

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; ... Yang, H; + view all (2019) Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes. Ecosystems 10.1007/s10021-019-00368-8. Green open access

[thumbnail of Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf]
Preview
Text
Anderson2019_Article_Landscape-ScaleVariabilityOfOr.pdf - Published Version

Download (1MB) | Preview

Abstract

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.

Type: Article
Title: Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10021-019-00368-8
Publisher version: https://doi.org/10.1007/s10021-019-00368-8
Language: English
Additional information: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Nitrogen; arctic; diatoms; tundra; biogenic silica; DOC; soil carbon
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/10074859
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item