Cold winter soils enhance dissolved organic carbon concentrations in soil and stream water

Concentrations of dissolved organic carbon ([DOC]) have increased in lakes, streams and rivers across a large part of the northern hemisphere and raised an animated scientific debate about the underlying mechanisms. The lack of consensus about the role of climate in controlling the DOC trends highli...

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Veröffentlicht in:Geophysical research letters Jg. 37; H. 8; S. np - n/a
Hauptverfasser: Haei, Mahsa, Öquist, Mats G., Buffam, Ishi, Ågren, Anneli, Blomkvist, Peder, Bishop, Kevin, Ottosson Löfvenius, Mikaell, Laudon, Hjalmar
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Washington, DC Blackwell Publishing Ltd 01.04.2010
American Geophysical Union
John Wiley & Sons, Inc
Schlagworte:
Biogeochemistry
Carbon
Climate change
Climatic conditions
Cryosphere
Dissolution
Dissolved organic carbon
Earth sciences
Earth, ocean, space
Environmental Sciences related to Agriculture and Land-use
Exact sciences and technology
Freshwater
Geophysics
Miljö- och naturvårdsvetenskap
Moisture content
Snowmelt
soil frost
Soil water
Soils
Streams
Surface water
Winter
winter climate
rivers
trend-surface analysis
springs
streams
latitude
Summer
concentration
climate
Dissolved organic carbon
Dynamical climatology
Climatic condition
surface water
Winter
Northern Hemisphere
gels
Snow melt
Spring(season)
regulations
Boreal
lakes
soils
climate change
ISSN:0094-8276, 1944-8007, 1944-8007
Online-Zugang:Volltext
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Zusammenfassung:Concentrations of dissolved organic carbon ([DOC]) have increased in lakes, streams and rivers across a large part of the northern hemisphere and raised an animated scientific debate about the underlying mechanisms. The lack of consensus about the role of climate in controlling the DOC trends highlights the need for understanding the regulation of surface water DOC. We found that longer and colder winters result in higher [DOC] in a boreal headwater stream during the subsequent snowmelt. In addition, prolonged soil frost increases the spring and summer [DOC] in the riparian soil water, which is a major contributor of stream water DOC in the studied area. We conclude that winter climatic conditions can play a substantial role in controlling stream [DOC] in ways not previously understood. These findings are especially important for northern latitude regions expected to be most affected by climate change.
Bibliographie:ArticleID:2010GL042821
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ISSN:0094-8276
1944-8007
1944-8007
DOI:10.1029/2010GL042821