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Volume 11, issue 6
The Cryosphere, 11, 2975–2996, 2017
https://doi.org/10.5194/tc-11-2975-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Changing Permafrost in the Arctic and its Global Effects in...

The Cryosphere, 11, 2975–2996, 2017
https://doi.org/10.5194/tc-11-2975-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 15 Dec 2017

Research article | 15 Dec 2017

Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure

Mathias Göckede et al.

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Arneth, A., Sitch, S., Bondeau, A., Butterbach-Bahl, K., Foster, P., Gedney, N., de Noblet-Ducoudré, N., Prentice, I. C., Sanderson, M., Thonicke, K., Wania, R., and Zaehle, S.: From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere, Biogeosciences, 7, 121–149, https://doi.org/10.5194/bg-7-121-2010, 2010.
Aubinet, M., Vesala, T., and Papale, D. (Eds.): Eddy Covariance – A practical guide to measurement and data analysis, Springer Atmospheric Sciences, Springer, The Netherlands, 438 pp., 2012.
Avis, C. A., Weaver, A. J., and Meissner, K. J.: Reduction in areal extent of high-latitude wetlands in response to permafrost thaw, Nat. Geosci., 4, 444–448, 2011.
Beringer, J., Lynch, A. H., Chapin, F. S., Mack, M., and Bonan, G. B.: The representation of arctic soils in the land surface model: The importance of mosses, J. Climate, 14, 3324–3335, 2001.
Beringer, J., Chapin, F. S., Thompson, C. C., and McGuire, A. D.: Surface energy exchanges along a tundra-forest transition and feedbacks to climate, Agr. Forest Meteorol., 131, 143–161, 2005.
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Shifts in hydrologic conditions will be a key factor for the sustainability of Arctic ecosystems under future climate change. Using a long-term manipulation experiment, we analyzed how energy exchange processes within a permafrost ecosystem react to sustained dry conditions. Changes in several important ecosystem characteristics lead to reduced evapotranspiration and increased sensible heat fluxes. Heat transfer into the soil was strongly reduced, keeping the permafrost colder.
Shifts in hydrologic conditions will be a key factor for the sustainability of Arctic ecosystems...
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