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

被引：72

作者：

Agren, A. ^{[1
]}

Haei, M. ^{[2
]}

Kohler, S. J. ^{[3
]}

Bishop, K. ^{[3
]}

Laudon, H. ^{[1
]}

机构：

[1] Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden

[2] Umea Univ, Dept Ecol & Environm Sci, S-90187 Umea, Sweden

[3] Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, S-75007 Uppsala, Sweden

来源：

BIOGEOSCIENCES | 2010年 / 7卷 / 09期

关键词：

HEADWATER CATCHMENT; FORESTED WATERSHEDS; TERRESTRIAL CARBON; BOREAL CATCHMENTS; SOIL FROST; RUNOFF; DYNAMICS; MATTER; EXPORT; TEMPERATURE;

D O I：

10.5194/bg-7-2901-2010

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

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.

引用

页码：2901 / 2913

页数：13

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