Climatic Change

, Volume 40, Issue 2, pp 229–245 | Cite as

Uncertainty in Predicting the Effect of Climatic Change on the Carbon Cycling of Canadian Peatlands

  • T.R. Moore
  • N.T. Roulet
  • J.M. Waddington


Northern peatlands play an important role globally in the cycling of C, through the exchange of CO2 with the atmosphere, the emission of CH4, the production and export of dissolved organic carbon (DOC) and the storage of C. Under 2 × CO2 GCM scenarios, most Canadian peatlands will be exposed to increases in mean annual temperature ranging between 2 and 6° C and increases in mean annual precipitation of 0 to 15 %, with the most pronounced changes occurring during the winter. The increase in CO2 uptake by plants, through warmer temperatures and elevated atmospheric CO2, is likely to be offset by increased soil respiration rates in response to warmer soils and lowered water tables. CH4 emissions are likely to decrease in most peatlands because of lowered water tables, except where the peat surface adjusts to fluctuating water tables, and in permafrost, where the collapse of dry plateau and palsa will lead to increase CH4 emission. There likely will be little change in DOC production, but DOC export to water bodies will decrease as runoff decreases. The storage of C in peatlands is sensitive to all C cycle components and is difficult to predict. The challenge is to develop quantitative models capable of making these predictions for different peatlands. We present some qualitative responses, with levels of uncertainty. There will be, however, as much variation in response to climatic change within a peatland as there will be among peatland regions.

carbon carbon dioxide methane dissolved organic carbon peatlands climatic change 


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  1. Alm, J., Talanov, A., Saarnio, S., Silvola, J., Ikkonen, E., Aaltonen, H., Nykänen, H. and Martikainen, P.: 1997,’ Reconstruction of the carbon balance for microsites in a boreal oligotrophic pine fen, Finland’, Oecologia 110, 423–431.Google Scholar
  2. Alm, J., Saarnio, S., Nykänen, H., Silvola, J. and Martikainen, P.J.:’ Winter CO2, CH4 and N2O fluxes on some boreal natural and drained peatlands’, Biogeochem., in press.Google Scholar
  3. Armentanao, T.V. and Menges, C.V.: 1986,’ Patterns of change in the carbon balance of organic-soil wetlands of the temperate zone’, J. Ecol. 74, 755–774.Google Scholar
  4. Bachand, R., Moore, T.R. and Roulet, N.T.: 1996, A Map of Methane Emission from Wetlands in Canada, Report # 96-7, Centre for Climate and Global Change Research, McGill University, Montreal, Canada.Google Scholar
  5. Ball, T.: 1996, Seasonal Transitions in Fluxes of Carbon Dioxide and Methane from an Ombrotrophic Peatland, Frontenac Bog, Southern Québec. M.Sc. Thesis, McGill University, Montréal, Canada.Google Scholar
  6. Bellisario, L.: 1995, Net Ecosystem Exchange and Methane Emissions from a Boreal Peatland, Thompson, Manitoba. M.Sc. Thesis, McGill University, Montréal, Canada.Google Scholar
  7. Bhardwaj, A.: 1997, Seasonal Variability of Net Carbon Dioxide Exchange in a Headwater Rag, Kenora, Ontario. M.Sc. Thesis, McGill University, Montréal, Canada.Google Scholar
  8. Blunier, T., Chappellaz, J., Schwander, J., Stauffer, B. and Raynaud, D.: 1995,’ Variations in atmospheric methane concentration during the Holocene epoch’, Nature 374, 46–49.Google Scholar
  9. Boer, G.J., McFarlane, N.A. and Lazare, M.: 1992,’ Greenhouse gas-induced climate change simulated with the CCC second-generation general circulation model’, J. Climate 5, 1045–1077.Google Scholar
  10. Breymeyer, A.I., Hall, D.O., Melillo, J.M. and Ågren, G.I. (eds.): 1996, Global Change: Effects on Coniferous Forests and Grasslands. SCOPE 56. John Wiley and Sons, New York, NY. 480 pp.Google Scholar
  11. Bridgham, S., Johnston, C.A., Pastor, J. and Updegraff, K.: 1995’ Potential feedbacks of northern wetlands on climate change, BioScience 45, 262–274.Google Scholar
  12. Bubier, J. and Moore, T.R.: 1996,’ Possible responses of northern peatlands to climate change in the zone of discontinuous permafrost, Manitoba, Canada, pp. 83–88 in Proc. Int. Workshop on Northern Peatlands in Global Climate Change, Academy of Finland, Helsinki, Finland.Google Scholar
  13. Bubier, J.L., Moore, T.R., Bellisario, L., Comer, N.T. and Crill, P.M.: 1995a,’ Ecological controls on methane emissions from a northern peatland complex in the zone of discontinuous permafrost, Manitoba, Canada, Global Biogeochem. Cycles 9, 455–470.Google Scholar
  14. Bubier, J., Moore, T.R. and Juggins, S.: 1995b,’ Predicting methane emission from bryophyte distribution in northern peatlands, Ecology 76, 677–693.Google Scholar
  15. Carroll, P. and Crill, P.M.: 1997,’ Carbon balance of a temperate poor fen’, Global Biogeochem. Cycles 11, 349–356.Google Scholar
  16. Clair, T.A. and Ehrman, J.M.: 1996,’ Variations in discharge and dissolved organic carbon and nitrogen export from terrestrial basins with changes in climate: a neural network approach’, Limnol. Oceanogr. 41, 921–927.Google Scholar
  17. Comer, N.T., Lafleur, P.M., Roulet, N.T., Letts, M.G., Skarupa, M. and Verseghy, D.: submitted,’ A test of the Canadian Land Surface Scheme (CLASS) for a variety of wetland types. Atmos.-Ocean. Google Scholar
  18. Dacey, J.W.H., Drake, B.G. and Klug, M.J.: 1994,’ Simulation of methane emission by carbon dioxide enrichment of marsh vegetation, Nature 370, 47–49.Google Scholar
  19. Dunfield, P., Knowles, R., Dumont, R. and Moore, T.: 1993, Methane production and consumption in temperate and subarctic peat soils: response to temperature and pH, Soil Biol. Biochem. 23, 321–326.Google Scholar
  20. Franzén, L.G.: 1994,’ Are wetlands the key to the ice-age cycle enigma?’, Ambio 23, 300–308.Google Scholar
  21. Franzén, L.G., Chen, D. and Klinger, L.F.: 1996,’ Principles for a climate regulation mechanism during thre late Phanerozoic Era, based on carbon fixation in peat-forming wetlands, Ambio 25, 435–442.Google Scholar
  22. Frolking, S., Bubier, J.L., Moore, T.R., Ball, T., Bellisario, L.M., Bhardwaj, A., Carroll, P., Crill, P.M., Lafleur, P.M., McCaughey, J.H., Roulet, N.T., Suyker, A.E., Verma, S.B., Waddington, J.M. and Whiting, G.J.: 1998,’ The relationship between ecosystem productivity and photosynthetically active radiation for northern peatlands’, Global Biogeochem. Cycles 12, 115–126.Google Scholar
  23. Frolking, S. and Crill, P.: 1994,’ Climate controls on temporal variability of methane flux from a poor fen in southeastern New Hampshire: Measurement and modelling’, Global Biogeochem. Cycles 8, 385–397.Google Scholar
  24. Frolking, S., Goulden, M.L., Wofsy, S.C., Fan, S-M., Sutton, D.J., Munger, J.W., Bazzaz, A.M., Daube, B.C., Crill, P.M., Aber, J.D., Band, L.E., Wang, X., Savage, K., Moore, T. and Harriss, R.C.: 1996,’ Modeling temporal variability in the carbon balance of a spruce/moss boreal forest’, Global Change Biol. 2, 343–366.Google Scholar
  25. Gignac, L.D. and Vitt, D.H.: 1994,’ Responses of northern peatlands to climate change: effects on bryophytes’ J. Hattori Bot. Lab. 75, 119–132.Google Scholar
  26. Gorham, E.: 1991,’ Northern peatlands: role in the carbon cycle and probable responses to climatic warming’, Ecol. Applic. 1, 182–195.Google Scholar
  27. Gorham, E.: 1995,’ The biogeochemistry of northern peatlands and its possible response to global warming,’ pp. 169–187 in G.M. Woodwell (ed.) Biotic Processes and Potential Feedbacks, Cambridge University Press, New York, NY.Google Scholar
  28. Halsey, L.A., Vitt, D.H. and Zoltai, S.C.: 1995,’ Disequilibrium response of permafrost in boreal continental western Canada to climate change’, Clim. Change 30, 57–73.Google Scholar
  29. Honeywill, C. and Roulet, N.: 1997, Peatland Carbon Simulator Workshop. Report # 97-3. Centre for Climate and Global Change Research, McGill University, Montreal, Canada.Google Scholar
  30. Jauhiainen, J. and Silvola, J.: 1996,’ The effect of elevated CO2 concentration on photosynthesis of Sphagnum fuscum’, pp. 11–14 in Proc. Int. Workshop on Northern Peatlands in Global Climate Change, Academy of Finland, Helsinki, Finland.Google Scholar
  31. Jauhiainen, J., Matero, J. and Vasander, H.: 1996,’ The effect of elevated CO2 and N-input on Sphagna with different trophy’, pp. 15–17 in Proc. Int. Workshop on Northern Peatlands in Global Climate Change, Academy of Finland, Helsinki, Finland.Google Scholar
  32. Klinger, L.F., Taylor, J.A. and Franzén, L.G.: 1996,’ The potential role of peatland dynamics in Ice-Age initiation,’ Quatern. Res. 45, 89–92.Google Scholar
  33. Korhola, A. and Tolonen, K.: 1996,’ The natural history of mires in Finland and the rate of peat accumulation’, pp. 20–26 in Vasander H. (ed.) Peatlands in Finland, Finnish Peat Society, Helsinki, Finland.Google Scholar
  34. Laiho, R., Laine, J. and Vasander, H. (eds.): 1996, Proc. Int. Workshop on Northern Peatlands in Global Climate Change, Academy of Finland, Helsinki, Finland.Google Scholar
  35. Laine, J. and Minkkinen, K.: 1996’ Forest drainage and the greenhouse effect’, pp. 159–164 in Vasander H. (ed.) Peatlands in Finland, Finnish Peat Society, Helsinki, Finland.Google Scholar
  36. Letts, M.G., Roulet, N.T., Comer N.T., Skarupa, M. and Verseghy, D.: submitted,’ Parameterization of peatland hydraulic properties for the Canadian Land Surface Scheme’, Atmos.-Ocean. Google Scholar
  37. Liblik, L., Moore, T.R., Bubier, J.L. and Robinson, S.D.: 1997,’ Methane emissions from wetlands in the discontinuous permafrost zone: Fort Simpson, NWT, Canada’, Global Biogeochem. Cycles 11, 485–494.Google Scholar
  38. Manabe, R.J., Spelman, M.J. and Stouffer, J.J.: 1992,’ Transient responses of a coupled occan-atmosphere model to gradual changes of atmospheric CO2. Part II: Seasonal response’, J. Climate 5, 105–126.Google Scholar
  39. McKnight, D., Brakke, D.F. and Mulholland, P.J. (eds.): 1996,’ Freshwater Ecosystems and Climate Change in North America,’ Limnol. Oceanogr. 41, 815–1149.Google Scholar
  40. Melillo, J.M., McGuire, A.D., Kicklighter, D.W., Moore, B. III, Vosomarty, C.J. and Schloss, A.L.: 1993,’ Global climate change and terrestrial net primary production’, Nature 363, 234–240.Google Scholar
  41. Molot, L.A. and Dillon, P.J.: 1996,’ Storage of terrestrial carbon in boreal lake sediments and evasion to the atmosphere’, Global Biogeochem. Cycles 10, 483–492.Google Scholar
  42. Moore, T.R.: 1997,’ Dissolved organic carbon: sources, sinks and fluxes and role in the soil carbon cycle’, pp. 281–292 in Lal, R., Kimble, J.M., Follett, R.F. and Stewart, B.A. (eds.) Soil Processes and the Carbon Cycle, Advances in Soil Science, CRC Press, Boca Raton.Google Scholar
  43. Moore, T.R. and Dalva, M.: 1993,’ The influence of temperature and water table position on methane and carbon dioxide emissions from laboratory columns of peatland soils’, J. Soil Sci. 44, 651–64.Google Scholar
  44. Moore, T.R. and Dalva, M.: 1997,’ Methane and carbon dioxide exchange potentials of peat soils in aerobic and anaerobic laboratory incubations’, Soil Biol. Biochem. 29, 1159–1164.Google Scholar
  45. Moore, T.R., Trofymow, A.J., Taylor, B., Prescott, C., Camire, C., Duschene, L., Fyles, J., Kozak, L., Kranabetter, M., Morrison, I., Siltanen, M., Smith, S., Titus, B., Visser, S., Wein, R. and Zoltai, S.: in press,’ Litter decomposition rates in Canadian forests’, Global Change Biol.Google Scholar
  46. Roulet, N., Moore, T., Bubier, J. and Lafleur, P.: 1992’ Northern fens: methane flux and climatic change’, Tellus 44B, 100–105.Google Scholar
  47. Ruimy, A., Jarvis, P.G., Baldocchi, D.D. and Saugier, B.: 1995,’ CO2 fluxes over plant canopies and solar radiation: a review’, Adv. Ecol. Res. 26, 1–68.Google Scholar
  48. Russell, G.L., Miller, J.R. and Rind, D.: 1995,’ A coupled atmosphere-ocean model for transient climate change studies’, Atmos.-Ocean 33, 683–730.Google Scholar
  49. Saarnio, S., Alm, J., Silvola, J., Nykänen, H. and Martikainen, P.J.: 1996,’ Effects of elevated atmospheric CO2 concentration on CH4 emission from peat monoliths of an oligotrophic fen’, pp. 178–182 in Proc. Int. Workshop on Northern Peatlands in Global Climate Change, Academy of Finland, Helsinki, Finland.Google Scholar
  50. Shaver, G.R., Billings, W.D., Chapin, F.S. III, Giblin, A.E., Nadelhoffer, K.J., Oechel, W.C. and Rastetter, E.B.: 1992,’ Global change and the carbon balance of arctic ecosystems’, BioScience 61, 415–435.Google Scholar
  51. Schimel, D., Alves, D., Enting, I., Heimann, M., Joos, F., Raynaud, R., Wigley, T., Prather, M., Derwent, R., Ehhalt, D., Fraser, P., Sanhueza, E., Zhou, X. Jonas, P., Charlson, R., Rodhe, H., Sadasivan, S., Shine, K.P., Fouquart, Y., Ramaswamy, V., Solomon, S., Srinivasan, J., Albritton, D., Isaksen, I., Lal, M. and Wuebbles, D.: 1995,’ Radiative forcing of climatic change’, pp. 69–131 in Houghton, J.T., Meira Filho, L.G., Callander, B.A., Harris, N., Kattenberg, A. and Maskell, K. (eds.) Climate Change 1995, Cambridge University Press, Cambridge.Google Scholar
  52. Schindler, D.W., Curtis, P.J., Parker, B.R. and Stainton, M.P.: 1996,’ Consequences of climate warming and lake acidification for UV-B penetration in North American boreal lakes’, Nature 379, 705–708.Google Scholar
  53. Silvola, J., Alm, J., Ahlholm, U., Nykänen, H. and Martikainen, P.: 1996a,’ The contribution to plant roots to CO2 fluxes from organic soils’, Biol. Fert. Soils 23, 126–131.Google Scholar
  54. Silvola, J., Alm, J., Ahlholm, U., Nykänen, H. and Martikainen, P.J.: 1996b,’ CO2 fluxes from peat in boreal mires under varying temperature and moisture conditions’, J. Ecol. 84, 219–228.Google Scholar
  55. Urban, N.R., Bayley, S.E. and Eisenreich, S.J.: 1989,’ Export of dissolved organic carbon and acidity from peatlands’, Water Resour. Res. 25, 1619–1628.Google Scholar
  56. Vitt, D.H., Halsey, L.A. and Zoltai, S.C.: 1994,’ The bog landforms of continental western Canada relative to climate and permafrost patterns’, Arct. Alp. Res. 26, 1–13.Google Scholar
  57. Waddington, J.M.:’ The effect of climatic change on the CO2 budget of wetlands near Churchill, Manitoba, Clim. Change, in press.Google Scholar
  58. Waddington, J.M., Roulet, N.T. and Swanson, R.V.: 1996’ Water table control of methane emission enhancement by vascular plants in boreal peatlands’ J. Geophys. Res. 101, 22775–22785.Google Scholar
  59. Whiting, G.J. and Chanton, J.: 1992,’ Plant-dependent CH4 emission in a subarctic Canadian fen,’ Global Biogeochem. Cycles 6, 225–231.Google Scholar
  60. Whiting, G.J. and Chanton, J.: 1993,’ Primary production control of methane emission from wetlands,’ Nature 364, 794–795.Google Scholar
  61. Windsor, J., Moore, T.R. and Roulet, N.T.: 1992,’ Episodic fluxes of methane from subarctic fens’, Can. J. Soil. Sci. 72, 441–52.Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • T.R. Moore
    • 1
  • N.T. Roulet
    • 1
  • J.M. Waddington
    • 1
  1. 1.Department of Geography and Centre for Climate & Global Change ResearchMcGill UniversityCanada

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