Global Biogeochemical Cycles


Carbon Biogeochemistry in Boreal Aquatic Systems: The Role of Aquatic Networks in the Boreal Carbon Cycle

Global Biogeochemical Cycles, vol. 26, no. , 2012

Guest Editor(s): P. del Giorgio, R. Striegl

Carbon Biogeochemistry in Boreal Aquatic Systems: The Role of Aquatic Networks in the Boreal Carbon Cycle

  1. Regular Articles

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    2. Regular Articles
    1. You have full text access to this OnlineOpen article
      Carbon evasion/accumulation ratio in boreal lakes is linked to nitrogen (pages 363–374)

      Pirkko Kortelainen, Miitta Rantakari, Hannu Pajunen, Jari T. Huttunen, Tuija Mattsson, Sari Juutinen, Tuula Larmola, Jukka Alm, Jouko Silvola and Pertti J. Martikainen

      Version of Record online: 30 APR 2013 | DOI: 10.1002/gbc.20036

      Key Points

      • Role of lakes in long term C balance is linked to N
      • Climate/deposition were more important drivers for water chemistry than land use
      • Variability of TOC was minor, TIC variability reflected CO2 accumulation
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      Spatiotemporal variations of pCO2 and δ13C-DIC in subarctic streams in northern Sweden (pages 176–186)

      Reiner Giesler, Carl-Magnus Mörth, Jan Karlsson, Erik J. Lundin, Steve W. Lyon and Christoph Humborg

      Version of Record online: 28 FEB 2013 | DOI: 10.1002/gbc.20024

      Key Points

      • Stream CO2 is not separated by watershed vegetation in high-latitude environment
      • Strong respiratory influence and high pCO2 during winter baseflow conditions
      • summer base flow 13C-DIC values are more affected by in-situ stream processes
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      Dissolved organic matter composition of winter flow in the Yukon River basin: Implications of permafrost thaw and increased groundwater discharge

      Jonathan A. O'Donnell, George R. Aiken, Michelle A. Walvoord and Kenna D. Butler

      Version of Record online: 17 NOV 2012 | DOI: 10.1029/2012GB004341

      Key Points

      • DOM composition of winter flow is spatially variable
      • The variation in DOM reflects differences in permafrost hydrology
      • Future thaw and increases in groundwater discharge will alter DOM character
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      Carbon dioxide and methane emissions from the Yukon River system

      Robert G. Striegl, M. M. Dornblaser, C. P. McDonald, J. R. Rover and E. G. Stets

      Version of Record online: 14 NOV 2012 | DOI: 10.1029/2012GB004306

      Key Points

      • Carbon gas emissions from a boreal river system
      • Circumboreal comparison of CO2 and CH4 emission from rivers
      • Quantify river surface area extent in a boreal river basin
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      Long-term C accumulation and total C stocks in boreal lakes in northern Québec

      Marie-Eve Ferland, Paul A. del Giorgio, Cristian R. Teodoru and Yves T. Prairie

      Version of Record online: 23 OCT 2012 | DOI: 10.1029/2011GB004241

      Key Points

      • Lakes of Eastmain region store on average 3.8 g C m-2 yr-1
      • Scaling of C accumulation is based on lake morphometry
      • Our lakes stores 23 kg C m-2 (per lake area) and equals 25% of landscape C storage
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      Biodegradability of dissolved organic carbon in the Yukon River and its tributaries: Seasonality and importance of inorganic nitrogen

      K. P. Wickland, G. R. Aiken, K. Butler, M. M. Dornblaser, R. G. M. Spencer and R. G. Striegl

      Version of Record online: 26 SEP 2012 | DOI: 10.1029/2012GB004342

      Key Points

      • Biodegradable DOC is transported by high-latitude rivers year-round
      • Biodegradable DOC is driven by inorganic nitrogen availability
      • Major arctic rivers export approximately 2.3 Tg C yr-1 as Biodegradable DOC
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      Landscape-level controls on dissolved carbon flux from diverse catchments of the circumboreal

      Suzanne E. Tank, Karen E. Frey, Robert G. Striegl, Peter A. Raymond, Robert M. Holmes, James W. McClelland and Bruce J. Peterson

      Version of Record online: 21 AUG 2012 | DOI: 10.1029/2012GB004299

      Key Points

      • Controls on bicarbonate flux from boreal catchments are near universal
      • River HCO3, and CO2 fixed via weathering, decrease with increasing permafrost
      • Permafrost has a region-specific effect on DOC flux from boreal catchments

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