Articles | Volume 16, issue 5
https://doi.org/10.5194/tc-16-1889-2022
https://doi.org/10.5194/tc-16-1889-2022
Research article
 | 
19 May 2022
Research article |  | 19 May 2022

High nitrate variability on an Alaskan permafrost hillslope dominated by alder shrubs

Rachael E. McCaully, Carli A. Arendt, Brent D. Newman, Verity G. Salmon, Jeffrey M. Heikoop, Cathy J. Wilson, Sanna Sevanto, Nathan A. Wales, George B. Perkins, Oana C. Marina, and Stan D. Wullschleger

Related authors

Spatial patterns of snow distribution in the sub-Arctic
Katrina E. Bennett, Greta Miller, Robert Busey, Min Chen, Emma R. Lathrop, Julian B. Dann, Mara Nutt, Ryan Crumley, Shannon L. Dillard, Baptiste Dafflon, Jitendra Kumar, W. Robert Bolton, Cathy J. Wilson, Colleen M. Iversen, and Stan D. Wullschleger
The Cryosphere, 16, 3269–3293, https://doi.org/10.5194/tc-16-3269-2022,https://doi.org/10.5194/tc-16-3269-2022, 2022
Short summary
Environmental Controls on Observed Spatial Variability of Soil Pore Water Geochemistry in Small Headwater Catchments Underlain with Permafrost
Nathan Alec Conroy, Jeffrey Heikoop, Emma Lathrop, Dea Musa, Brent Newman, Chonggang Xu, Rachael McCaully, Carli Arendt, Verity Salmon, Amy Breen, Vladimir Romanovsky, Katrina Bennett, Cathy Wilson, and Stan Wullschleger
EGUsphere, https://doi.org/10.5194/egusphere-2022-137,https://doi.org/10.5194/egusphere-2022-137, 2022
Short summary
The importance of freeze–thaw cycles for lateral tracer transport in ice-wedge polygons
Elchin E. Jafarov, Daniil Svyatsky, Brent Newman, Dylan Harp, David Moulton, and Cathy Wilson
The Cryosphere, 16, 851–862, https://doi.org/10.5194/tc-16-851-2022,https://doi.org/10.5194/tc-16-851-2022, 2022
Short summary
Age and chemistry of dissolved organic carbon reveal enhanced leaching of ancient labile carbon at the permafrost thaw zone
Karis J. McFarlane, Heather M. Throckmorton, Jeffrey M. Heikoop, Brent D. Newman, Alexandra L. Hedgpeth, Marisa N. Repasch, Thomas P. Guilderson, and Cathy J. Wilson
Biogeosciences, 19, 1211–1223, https://doi.org/10.5194/bg-19-1211-2022,https://doi.org/10.5194/bg-19-1211-2022, 2022
Short summary
Development of observation-based global multilayer soil moisture products for 1970 to 2016
Yaoping Wang, Jiafu Mao, Mingzhou Jin, Forrest M. Hoffman, Xiaoying Shi, Stan D. Wullschleger, and Yongjiu Dai
Earth Syst. Sci. Data, 13, 4385–4405, https://doi.org/10.5194/essd-13-4385-2021,https://doi.org/10.5194/essd-13-4385-2021, 2021
Short summary

Related subject area

Discipline: Frozen ground | Subject: Biogeochemistry/Biology
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods
Loeka L. Jongejans, Kai Mangelsdorf, Cornelia Karger, Thomas Opel, Sebastian Wetterich, Jérémy Courtin, Hanno Meyer, Alexander I. Kizyakov, Guido Grosse, Andrei G. Shepelev, Igor I. Syromyatnikov, Alexander N. Fedorov, and Jens Strauss
The Cryosphere, 16, 3601–3617, https://doi.org/10.5194/tc-16-3601-2022,https://doi.org/10.5194/tc-16-3601-2022, 2022
Short summary
Improved ELMv1-ECA simulations of zero-curtain periods and cold-season CH4 and CO2 emissions at Alaskan Arctic tundra sites
Jing Tao, Qing Zhu, William J. Riley, and Rebecca B. Neumann
The Cryosphere, 15, 5281–5307, https://doi.org/10.5194/tc-15-5281-2021,https://doi.org/10.5194/tc-15-5281-2021, 2021
Short summary
The role of vadose zone physics in the ecohydrological response of a Tibetan meadow to freeze–thaw cycles
Lianyu Yu, Simone Fatichi, Yijian Zeng, and Zhongbo Su
The Cryosphere, 14, 4653–4673, https://doi.org/10.5194/tc-14-4653-2020,https://doi.org/10.5194/tc-14-4653-2020, 2020
Short summary
Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils
Mukan Ji, Weidong Kong, Chao Liang, Tianqi Zhou, Hongzeng Jia, and Xiaobin Dong
The Cryosphere, 14, 3907–3916, https://doi.org/10.5194/tc-14-3907-2020,https://doi.org/10.5194/tc-14-3907-2020, 2020
Short summary
Large carbon cycle sensitivities to climate across a permafrost thaw gradient in subarctic Sweden
Kuang-Yu Chang, William J. Riley, Patrick M. Crill, Robert F. Grant, Virginia I. Rich, and Scott R. Saleska
The Cryosphere, 13, 647–663, https://doi.org/10.5194/tc-13-647-2019,https://doi.org/10.5194/tc-13-647-2019, 2019
Short summary

Cited articles

Baldwin, D. S. and Mitchell, A. M.: The effects of drying and re-flooding on the sediment and soil nutrient dynamics of lowland river-floodplain systems: A synthesis, Regul. Rivers: Res. Mgmt., 16, 457–467, https://doi.org/10.1002/1099-1646(200009/10)16:5<457::AID-RRR597>3.0.CO;2-B, 2000. 
Barnes, R. T., Williams, M. W., Parman, J. N., Hill, K., and Caine, N.: Thawing glacial and permafrost features contribute to nitrogen export from Green Lakes Valley, Colorado Front Range, USA, Biogeochemistry, 117, 413–430, https://doi.org/10.1007/s10533-013-9886-5, 2014. 
Bechtold, J. S., Edwards, R. T., and Naiman R. J.: Biotic versus hydrologic control over seasonal nitrate leaching in a floodplain forest, Biogeochemistry, 63, 53–72, https://doi.org/10.1023/A:1023350127042, 2003. 
Bernal, S., Butturini, A., Nin, E., Sabater, F., and Sabater, S.: Leaf litter dynamics and nitrous oxide emission in a Mediterranean riparian forest, J. Environ. Qual., 32, 191–197, https://doi.org/10.2134/jeq2003.1910, 2003. 
Boike, J., Juszak, I., Lange, S., Chadburn, S., Burke, E., Overduin, P. P., Roth, K., Ippisch, O., Bornemann, N., Stern, L., Gouttevin, I., Hauber, E., and Westermann, S.: A 20-year record (1998–2017) of permafrost, active layer and meteorological conditions at a high Arctic permafrost research site (Bayelva, Spitsbergen), Earth Syst. Sci. Data, 10, 355–390, https://doi.org/10.5194/essd-10-355-2018, 2018. 
Download
Short summary
Degrading permafrost and shrub expansion are critically important to tundra biogeochemistry. We observed significant variability in soil pore water NO3-N in an alder-dominated permafrost hillslope in Alaska. Proximity to alder shrubs and the presence or absence of topographic gradients and precipitation events strongly influence NO3-N availability and mobility. The highly dynamic nature of labile N on small spatiotemporal scales has implications for nutrient responses to a warming Arctic.