Articles | Volume 7, issue 9
https://doi.org/10.5194/bg-7-2901-2010
https://doi.org/10.5194/bg-7-2901-2010
Research article
 | 
23 Sep 2010
Research article |  | 23 Sep 2010

Regulation of stream water dissolved organic carbon (DOC) concentrations during snowmelt; the role of discharge, winter climate and memory effects

A. Ågren, M. Haei, S. J. Köhler, K. Bishop, and H. Laudon

Abstract. Using a 15 year stream record from a northern boreal catchment, we demonstrate that the inter-annual variation in dissolved organic carbon (DOC) concentrations during snowmelt was related to discharge, winter climate and previous DOC export. A short and intense snowmelt gave higher stream water DOC concentrations, as did long winters, while a high previous DOC export during the antecedent summer and autumn resulted in lower concentrations during the following spring. By removing the effect of discharge we could detect that the length of winter affected the modeled soil water DOC concentrations during the following snowmelt period, which in turn affected the concentrations in the stream. Winter climate explained more of the stream water DOC variations than previous DOC export during the antecedent summer and autumn.

Download
Altmetrics
Final-revised paper
Preprint