Articles | Volume 22, issue 2
Hydrol. Earth Syst. Sci., 22, 1081–1093, 2018
https://doi.org/10.5194/hess-22-1081-2018

Special issue: Understanding and predicting Earth system and hydrological...

Hydrol. Earth Syst. Sci., 22, 1081–1093, 2018
https://doi.org/10.5194/hess-22-1081-2018

Research article 08 Feb 2018

Research article | 08 Feb 2018

Hydrological processes and permafrost regulate magnitude, source and chemical characteristics of dissolved organic carbon export in a peatland catchment of northeastern China

Yuedong Guo et al.

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Subject: Catchment hydrology | Techniques and Approaches: Instruments and observation techniques
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Cited articles

Ågren, A., Haei, M., Köhler, S. J., Bishop, K., and Laudon, H.: Regulation of stream water dissolved organic carbon (DOC) concentrations during snowmelt; the role of discharge, winter climate and memory effects, Biogeosciences, 7, 2901–2913, https://doi.org/10.5194/bg-7-2901-2010, 2010. 
Andersson, J.-O. and Nyberg, L.: Spatial variation of wetlands and flux of dissolved organic carbon in boreal headwater streams, Hydrol. Process., 22, 1965–1975, 2008. 
Avagyan, A., Runkle, B. R. K., Hennings, N., Haupt, H., Virtanen, T., and Kutzbach, L.: Dissolved organic matter dynamics during the spring snowmelt at a boreal river valley mire complex in Northwest Russia, Hydrol. Process., 30, 1727–1741, 2016. 
Balcarczyk, K. L., Jones Jr., J. B., Jaffé, R., and Maie, N.: Stream dissolved organic matter bioavailability and composition in watersheds underlain with discontinuous permafrost, Biogeochemistry, 94, 255–270, 2009. 
Broder, T., Knorr, K.-H., and Biester, H.: Changes in dissolved organic matter quality in a peatland and forest headwater stream as a function of seasonality and hydrologic conditions, Hydrol. Earth Syst. Sci., 21, 2035–2051, https://doi.org/10.5194/hess-21-2035-2017, 2017. 
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Short summary
The study examined dynamics of DOC export from a permafrost peatland catchment located in northeastern China. The findings indicated that the DOC export is a transport-limited process and the DOC load was significant for the net carbon balance in the studied catchment. The flowpath shift process is key to observed DOC concentration, resources and chemical characteristics in discharge. Permafrost degradation would likely elevate the proportion of microbe-originated DOC in baseflow.