Wickland, Kimberly P.

19 items:

Vulnerability of high-latitude soil organic carbon in North America to disturbance Categories: Publication; Types: Citation
Effects of permafrost melting on CO2 and CH4 exchange of a poorly drained black spruce lowland Categories: Publication; Types: Citation
Seasonal and spatial variability in dissolved organic matter quantity and composition from the Yukon River basin, Alaska Categories: Publication; Types: Citation
Runoff sources and flow paths in a partially burned, upland boreal catchment underlain by permafrost Boreal soils in permafrost regions contain vast quantities of frozen organic material that is released to terrestrial and aquatic environments via subsurface flow paths as permafrost thaws. Longer flow paths may allow chemical reduction of solutes, nutrients, and contaminants, with implications for greenhouse gas emissions and aqueous export. Predicting boreal catchment runoff is complicated by soil heterogeneities related to variability in active layer thickness, soil type, fire history, and preferential flow potential. By coupling measurements of permeability, infiltration potential, and water chemistry with a stream chemistry end-member mixing model, we tested the hypothesis that organic soils and burned slopes... Categories: Publication; Types: Citation; Tags: Modeling, Monitoring 2-Standardized Stream and Lake Information, Monitoring 3-Improve Permafrost Mapping, and Monitoring
Emissions of carbon dioxide and methane from a headwater stream network of interior Alaska Boreal ecosystems store significant quantities of organic carbon (C) that may be vulnerable to degradation as a result of a warming climate. Despite their limited coverage on the landscape, streams play a significant role in the processing, gaseous emission, and downstream export of C, and small streams are thought to be particularly important because of their close connection with the surrounding landscape. However, ecosystem carbon studies do not commonly incorporate the role of the aquatic conduit. We measured carbon dioxide (CO2) and methane (CH4) concentrations and emissions in a headwater stream network of interior Alaska underlain by permafrost to assess the potential role of stream gas emissions in the regional... Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Monitoring 2-Standardized Stream and Lake Information

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