Articles | Volume 17, issue 7
https://doi.org/10.5194/tc-17-3101-2023
https://doi.org/10.5194/tc-17-3101-2023
Research article
 | 
31 Jul 2023
Research article |  | 31 Jul 2023

Responses of dissolved organic carbon to freeze–thaw cycles associated with the changes in microbial activity and soil structure

You Jin Kim, Jinhyun Kim, and Ji Young Jung

Related subject area

Discipline: Frozen ground | Subject: Biogeochemistry/Biology
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Cited articles

Al-Houri, Z. M., Barber, M. E., Yonge, D. R., Ullman, J. L., and Beutel, M. W.: Impacts of frozen soils on the performance of infiltration treatment facilities, Cold Reg. Sci. Technol., 59, 51–57, https://doi.org/10.1016/j.coldregions.2009.06.002, 2009. 
Athmann, M., Kautz, T., Pude, R., and Köpke, U.: Root growth in biopores-evaluation with in situ endoscopy, Plant Soil, 371, 179–190, https://doi.org/10.1007/s11104-013-1673-5, 2013. 
Ban, Y., Lei, T., Liu, Z., and Chen, C.: Comparison of rill flow velocity over frozen and thawed slopes with electrolyte tracer method, J. Hydrol., 534, 630–637, https://doi.org/10.1016/j.jhydrol.2016.01.028, 2016. 
Berggren, M., Klaus, M., Selvam, B. P., Ström, L., Laudon, H., Jansson, M., and Karlsson, J.: Quality transformation of dissolved organic carbon during water transit through lakes: contrasting controls by photochemical and biological processes, Biogeosciences, 15, 457–470, https://doi.org/10.5194/bg-15-457-2018, 2018. 
Bird, N. R. A., Perrier, E., and Rieu, M.: The water retention function for a model of soil structure with pore and solid fractal distributions, Eur. J. Soil Sci., 51, 55–63, https://doi.org/10.1046/j.1365-2389.2000.00278.x, 2000. 
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Short summary
This study demonstrated the response of organic soils in the Arctic tundra to freeze–thaw cycles (FTCs), focusing on the quantitative and qualitative characteristics of dissolved organic carbon (DOC). The highlights found in this study are as follows: (i) FTCs altered DOC properties without decreasing soil microbial activities, and (ii) soil aggregate distribution influenced by FTCs changed DOC characteristics by enhancing microbial activities and altering specific-sized soil pore proportion.