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> Anderson N. J. >
Landscape-Scale Var...
Landscape-Scale Variability of Organic Carbon Burial by SW Greenland Lakes
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- Anderson, N.J. (författare)
- Loughborough University
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- Appleby, P.G. (författare)
- University of Liverpool
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- Bindler, Richard, 1963- (författare)
- Umeå University,Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Arcum
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- Renberg, I. (författare)
- Umeå University
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- Conley, D. J. (författare)
- Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
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- Fritz, S. C. (författare)
- University of Nebraska - Lincoln
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- Jones, V.J. (författare)
- University College London
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- Whiteford, E.J. (författare)
- Loughborough University,Nottingham Trent University
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- Yang, H (författare)
- University College London
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(creator_code:org_t)
- 2019-04-29
- 2019
- Engelska.
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Ingår i: Ecosystems (New York. Print). - : Springer. - 1432-9840 .- 1435-0629. ; 22:8, s. 1706-1720
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Abstract
Ämnesord
Stäng
- 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. 210Pb-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 210Pb 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 km2, 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 × 109 g C y−1 post 1950. Given the low C content of soils in this area, lakes represent a substantial regional C store.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Nyckelord
- nitrogen
- arctic
- diatoms
- tundra
- biogenic silica
- DOC
- soil carbon
- arctic
- biogenic silica
- diatoms
- DOC
- nitrogen
- soil carbon
- tundra
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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