Contrasting seasonal patterns in particle aggregation and dissolved organic matter transformation in a sub-Arctic fjord

Digernes, Maria G.; Bodur, Yasemin V.; Amargant-Arumí, Martí; Müller, Oliver; Hawkes, Jeffrey A.; Kohler, Stephen G.; Dietrich, Ulrike; Reigstad, Marit; Paulsen, Maria L.

doi:https://doi.org/10.5194/bg-22-601-2025

Articles | Volume 22, issue 2

https://doi.org/10.5194/bg-22-601-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-22-601-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 2

Research article

|

31 Jan 2025

Research article |

| 31 Jan 2025

Contrasting seasonal patterns in particle aggregation and dissolved organic matter transformation in a sub-Arctic fjord

Maria G. Digernes, Yasemin V. Bodur, Martí Amargant-Arumí, Oliver Müller, Jeffrey A. Hawkes, Stephen G. Kohler, Ulrike Dietrich, Marit Reigstad, and Maria L. Paulsen

Supplement

https://doi.org/10.5194/bg-22-601-2025-supplement

Data sets

Raw mass spectrometry data (mzXML) and MATLAB code for DOM in- Contrasting seasonal patterns in particle aggregation and DOM transformation in a sub-Arctic fjord Maria G. Digernes and Jeffrey Hawkes https://doi.org/10.5281/zenodo.14272939

Ramfjord cdom absorbance at 350nm Tromsø Norway Maria Lund Paulsen https://doi.org/10.11582/2024.00096

Monthly measurements of particulate organic carbon and nitrogen concentrations in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Yasemin V. Bodur et al. https://doi.org/10.11582/2024.00116

Monthly measurements of size-fractionated Chlorophyll-a and phaeopigments in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Martí Amargant-Arumí et al. https://doi.org/10.11582/2024.00117

Monthly measurements of total particulate matter and its organic and inorganic compartment in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Martí Amargant-Arumí et al. https://doi.org/10.11582/2024.00118

Monthly measurements of extracellular polymeric substances in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Ulrike Dietrich et al. https://doi.org/10.11582/2024.00119

Monthly measurements of dissolved nutrients (nitrate, nitrite, phosphate, silicate) in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Paul Dubourg et al. https://doi.org/10.11582/2024.00120

Monthly resolution of suspended protist taxonomy and abundance in Ramfjorden/Gáranasvuotna (Northern Norway) between September 2020 – August 2021 Anna Maria Dąbrowska et al. https://doi.org/10.11582/2024.00131

Monthly flow cytometry measurements in a sub-Arctic fjord, Ramfjord in Tromsø, Norway between September 2020 and August 2021 Maria Lund Paulsen et al. https://doi.org/10.11582/2024.00132

Measurements of particulate organic carbon and nitrogen concentrations, extracellular polymeric substance concentrations and flow cytometry measurements from an aggregation experiment in a sub-Arctic fjord, Ramfjord in Tromsø, Norway Yasemin V. Bodur et al. https://doi.org/10.11582/2024.00121

Dissolved organic carbon concentration and total dissolved nitrogen measurements in aggregation experiment in a sub-Arctic fjord, Ramfjord in Tromsø, Norway Maria Guadalupe Digernes et al. https://doi.org/10.11582/2024.00098

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Short summary

Dissolved (DOM) and particulate organic matter (POM) are in constant exchange but are usually studied as distinct entities. We investigated the dynamics between POM and DOM in a sub-Arctic fjord across different seasons by conducting bi-monthly aggregation–dissolution experiments. During the productive period, POM concentrations increased in the experiment, and DOM molecules became more recalcitrant. During the winter period, POM concentrations decreased, and DOM molecules became more labile.