How year-round monitoring is changing what we know about Arctic fjords

Researchers are building a much clearer picture of how an Arctic fjord really works by monitoring Kongsfjorden on Svalbard through the full annual cycle.

These efforts by iC3 researchers are challenging the old assumption that Arctic marine ecosystems only matter in summer, and provide a fuller understanding of how light, sea ice, glacier melt, ocean inflow and biology interact across the whole year.

Pulling up a plankton net in the dim light of January in Kongsfjorden in -21°C. Credit: Allison Bailey / Norwegian Polar Institute

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Year-round Arctic research infrastructure

For a long time, most Arctic marine research was shaped by logistics. Summer offered open water, milder weather and constant light, so that was when ships could work most easily.

But as a new Fram Forum article explains, this summer bias can hide important ecological changes. Winter studies have already shown that life does not simply stop during the polar night. Organisms remain active, key life stages unfold outside summer, and climate-sensitive shifts in seasonal timing can be missed if observations only happen during the brightest months.

Kongsfjorden, near Ny-Ålesund Research Station, offers a rare chance to do better. With year-round local infrastructure, a research boat, laboratories and regular winter access, it has become the base for the International Kongsfjorden Year, a coordinated effort to observe one Arctic marine system continuously through all seasons.

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Understanding fjords at the system level

What makes this effort so valuable is the breadth of the observations. Teams carried out weekly measurements at a central fjord site, seasonal surveys along the full fjord, eight Norwegian Polar Institute transects, bi-monthly water column measurements by Indian partners, and extra work by Arctic Field Grant researchers.

These observations covered plankton, protists, microbes, nutrients, biogeochemistry, hydrography, optical properties and hydroacoustics. Together, they make it possible to compare what happens at one point in the fjord with what happens across the wider system, from the glacier-influenced inner fjord to waters more strongly shaped by Atlantic inflow.

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Combining manual fieldwork with high-tech tools

Alongside ship-based sampling, researchers deployed extra moorings and UiT’s unmanned surface vehicle Apherusa also carried out seasonal hydroacoustic surveys. This mix of repeated fieldwork and autonomous observing systems created an unprecedented year-round record for one of the Arctic’s best-studied fjords.

For iC3, this is exactly the kind of interdisciplinary science that can help explain how cryosphere change reshapes marine systems. It also shows why long-term observing efforts are so valuable for early career researchers: they create space for collaboration, shared logistics, hands-on field experience and the kind of cross-disciplinary thinking that polar science needs.

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Find out more

The original article was published in Fram Forum under the title Year-round monitoring of the marine ecosystem in Kongsfjorden. To find out more about the iC3 researchers involved, see the interviews with Philipp Assmy, Fanny Cusset, Lucie Goraguer and Ricarda Runte.

Several iC3 researchers are part of this work, including Philipp Assmy, Fanny Cusset, Lucie Goraguer and Ricarda Runte. Together, they help to connect plankton ecology, contaminants, fjord biogeochemistry and sediment processes in one shared Arctic system.

Readers may also be interested in this related iC3 story on Arctic fjord change during the International Kongsfjorden Year.