Articles | Volume 21, issue 6
https://doi.org/10.5194/os-21-3089-2025
https://doi.org/10.5194/os-21-3089-2025
Research article
 | 
25 Nov 2025
Research article |  | 25 Nov 2025

Seasonal interplay of water mass mixing and nutrient dynamics in an Arctic fjord: a case study of Kongsfjorden, Svalbard

Hyebin Kim, Dukki Han, Sang Rul Park, and Tae-Hoon Kim

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Cited articles

Behrenfeld, M. J. and Boss, E. S.: Resurrecting the Ecological Underpinnings of Ocean Plankton Blooms, Annual Review of Marine Science, 6, 167–194, https://doi.org/10.1146/annurev-marine-052913-021325, 2014. 
Carmack, E. and Wassmann, P.: Food webs and physical–biological coupling on pan-Arctic shelves: Unifying concepts and comprehensive perspectives, Progress in Oceanography, 71, 446–477, https://doi.org/10.1016/j.pocean.2006.10.004, 2006. 
Codispoti, L. A., Kelly, V., Thessen, A., Matrai, P., Suttles, S., Hill, V., Steele, M., and Light, B.: Synthesis of primary production in the Arctic Ocean: III. Nitrate and phosphate based estimates of net community production, Progress in Oceanography, 110, 126–150, https://doi.org/10.1016/j.pocean.2012.11.006, 2013. 
Cottier, F., Tverberg, V., Inall, M., Svendsen, H., Nilsen, F., and Griffiths, C.: Water mass modification in an Arctic fjord through cross-shelf exchange: The seasonal hydrography of Kongsfjorden, Svalbard, J. Geophys. Res. Oceans, 110, C12005, https://doi.org/10.1029/2004JC002757, 2005. 
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Short summary
In the Arctic's Kongsfjorden, we distinguished the effects of physical water mixing from biological activity on nutrient dynamics. By calculating a "nutrient anomaly" (ΔNutrient), we quantified how biological uptake drives a seasonal shift from a nutrient-rich spring to a nutrient-limited summer. This approach reveals a "biogeochemical memory" of the spring bloom and helps predict the fjord's response to climate change, offering crucial insights into Arctic ecosystem productivity.
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