Navigation auf zora.uzh.ch

Search ZORA

ZORA (Zurich Open Repository and Archive)

Evolution of soil solution aluminum during transport along a forested boreal hillslope

Cory, Neil; Laudon, Hjalmar; Köhler, Stephan; Seibert, Jan; Bishop, Kevin H (2007). Evolution of soil solution aluminum during transport along a forested boreal hillslope. Journal of Geophysical Research, 112(G3):online.

Abstract

Aluminum (Al) transfer from soils to surface waters is a crucial determinant of aquatic biodiversity in acidified and/or naturally acid surface waters. Defining how landscapes and acid deposition influence Al export depends on our understanding of the mobilization of Al within catchments. This paper documents the evolution of Al chemistry in water during its transport through a hillslope by using soil water chemistry combined with hydrometric data. Al levels moving laterally from upslope mineral soils were low (<0.1 mg·L⁻¹). This is not consistent with a vertically infiltrating acidification front mobilizing Al from across the catchment. As water moves laterally downslope into the peaty soils of the riparian zone (RZ), Al increased along with organic acids and iron. The RZ in this study was thus a net source of Al to soil solution on all 9 sampling occasions where Al was measured, as well as a net source of dissolved organic carbon (DOC) on another dozen measurement occasions. The potential for Al concentrations being modified during transport through the RZ needs to be accounted for in efforts to relate acid deposition to toxic stream Al concentrations. Organic carrying capacity was in excess of Al for all samples. Only samples from the deeper mineral soils showed supersaturation; however, none of the samples showed degrees of supersaturation high enough for spontaneous mineral precipitation. A key area for further research is how the RZ can sustain a larger Al pool than upslope mineral soils when the supply of Al from these upslope soils to lateral flux is currently lower than that from the RZ. Two possibilities are either episodic downslope transport during periods of high lateral flow, or drainage-induced changes in hydrology that transformed the RZ from an accumulator of Al to a source of Al.

Additional indexing

Item Type:Journal Article, not_refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Scopus Subject Areas:Physical Sciences > Geophysics
Life Sciences > Forestry
Physical Sciences > Oceanography
Life Sciences > Aquatic Science
Physical Sciences > Ecology
Physical Sciences > Water Science and Technology
Life Sciences > Soil Science
Physical Sciences > Geochemistry and Petrology
Physical Sciences > Earth-Surface Processes
Physical Sciences > Atmospheric Science
Physical Sciences > Earth and Planetary Sciences (miscellaneous)
Physical Sciences > Space and Planetary Science
Physical Sciences > Paleontology
Language:English
Date:2007
Deposited On:31 Jan 2013 17:37
Last Modified:08 Jan 2025 02:42
Publisher:John Wiley & Sons
ISSN:0148-0227
Additional Information:An edited version of this paper was published by AGU. Copyright 2007 American Geophysical Union
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1029/2006JG000387
Full text not available from this repository.

Metadata Export

Statistics

Citations

Dimensions.ai Metrics
34 citations in Web of Science®
36 citations in Scopus®
Google Scholar™

Altmetrics

Authors, Affiliations, Collaborations

Similar Publications