Articles | Volume 17, issue 9
https://doi.org/10.5194/tc-17-3987-2023
https://doi.org/10.5194/tc-17-3987-2023
Research article
 | 
14 Sep 2023
Research article |  | 14 Sep 2023

Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost

Nathan Alec Conroy, Jeffrey M. Heikoop, Emma Lathrop, Dea Musa, Brent D. Newman, Chonggang Xu, Rachael E. McCaully, Carli A. Arendt, Verity G. Salmon, Amy Breen, Vladimir Romanovsky, Katrina E. Bennett, Cathy J. Wilson, and Stan D. Wullschleger

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This preprint is open for discussion and under review for Biogeosciences (BG).
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Cited articles

Binkley, D., Sollins, P., Bell, R., Sachs, D., and Myrold, D.: Biogeochemistry of Adjacent Conifer and Alder-Conifer Stands, Ecology, 73, 2022–2033, https://doi.org/10.2307/1941452, 1992. 
Breen, A., Iversen, C., Salmon, V., VanderStel, H., Busey, B., and Wullschleger, S.: NGEE Arctic Plant Traits: Plant Community Composition, Kougarok Road Mile Marker 64, Seward Peninsula, Alaska, 2016, NGEE Arctic [data set], https://doi.org/10.5440/1465967, 2020. 
Bring, A., Fedorova, I., Dibike, Y., Hinzman, L., Mård, J., Mernild, S. H., Prowse, T., Semenova, O., Stuefer, S. L., and Woo, M. -K.: Arctic terrestrial hydrology: A synthesis of processes, regional effects, and research challenges, J. Geophys. Res.-Biogeo., 121, 621–649, https://doi.org/10.1002/2015JG003131, 2016. 
Brobst, D. A., Pinckney, D. M., and Sainsbury, C. L.:Geology and geochemistry of the Sinuk River Barite deposit, Seward Peninsula, Alaska, https://doi.org/10.3133/ofr7154, 1971. 
Bühlmann, T., Hiltbrunner, E., and Körner, C.: Alnus viridis expansion contributes to excess reactive nitrogen release, reduces biodiversity and constrains forest succession in the Alps, Alp Botany, 124, 187–191, https://doi.org/10.1007/s00035-014-0134-y, 2014. 
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This study combines field observations, non-parametric statistical analyses, and thermodynamic modeling to characterize the environmental causes of the spatial variability in soil pore water solute concentrations across two Arctic catchments with varying extents of permafrost. Vegetation type, soil moisture and redox conditions, weathering and hydrologic transport, and mineral solubility were all found to be the primary drivers of the existing spatial variability of some soil pore water solutes.
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