Bjerknes Center for Climate Research (BCCR)

Less ice – more light. What will life be like in a bright, new Arctic? Earlier spring blooms mean less food in summer, when fish need it most. Polar cod in the Barents Sea are particularly vulnerable. 🧪 🌊 🦑 @oysteinvarpe.bsky.social @unibergen.bsky.social bjerknes.uib.no/en/news/en-l...

Volcanic eruptions linked to abrupt climate changes during the last ice age - NERSC A new international study shows that large volcanic eruptions in the tropics could disrupt major ocean currents during the last ice age, triggering abrupt,

Massive volcanic eruptions can cool the atmosphere, but they can also affect ocean currents and trigger abrupt climate shifts. Curious? Read more: nersc.no/en/features/...

Riding the storm A large-scale flight campaign on both sides of the Atlantic Ocean aims to uncover why some extratropical cyclones develop into storms, while others fizzle…

To sense the temper of a storm, you need to be right there – in the clouds. 🧪 @haraldsodemann.bsky.social @unibergen.bsky.social @scienceandtechuib.bsky.social

🧪🌊 Become a researcher within physical ocenography in the Arctic Ocean & the North Atlantic!
In our series with available positions, next one out is this one connected to the national research program @arcticocean2050.bsky.social
Supervisor: @mariusarthun.bsky.social
Come join us in Bergen!

The ice on Greenland is acting strangely. Deep inside the Greenland ice sheet are giant swirling plume-like structures. These have puzzled scientists for over a decade, but researchers now believe they have finally cracked the mystery. 🧪

www4.uib.no/en/research/...

🧪

Department of Biological Sciences at the University of Bergen has a vacancy for a postdoctoral research fellow position within climate change ecology.

Work with @vvandvik.bsky.social and the @ipcc.bsky.social.

www.jobbnorge.no/en/available...

🧪 Come work with us in Bergen! 🌊
Do you have a good understanding of paleoceanography & a masters degree in Geosciences, Marine Biology or similar - this might be your chance to become a researcher 💥
@i2b-erc.bsky.social
@polhavet2050.bsky.social

Read more and apply here: lnkd.in/e8KBAyPi

The Arctic overturning circulation: transformations, pathways and timescales Abstract. The Arctic is the northernmost terminus of the Atlantic Meridional Overturning Circulation and is an important source of the densest waters feeding its lower limb. However, relatively little...

🌊Where and how is dense water in the Arctic formed? In our new paper, we decompose the Arctic overturning circulation (ArMOC), the northernmost part of the AMOC. Check it out 🔽

@bjerknes.uib.no @mariusarthun.bsky.social @kristoferdoos.bsky.social @nansensenteret.bsky.social @noc.ac.uk

An evening in honor of Prof. Eystein Jansen "In the spirit of Eystein, it will be a gathering that emphasizes relationships, intellectual exchange, and the path forward, and is intended as a…

Thank you, Eystein, for all your achievements so far. We look forward to new ideas and initiatives in the coming years!
bjerknes.uib.no/en/news/eyst...

From the new generation paleoceanographers, Associate Professor Kaustubh Thirumalai at the University of Arizona, was a vibrant visiting guest, with a great seminar for all of the Bjerknes community the day ahead.

Professor Nele Meckler

Researcher Nil Irvali

Professor Emeritus Thomas Stocker

The event offered a warm atmosphere with excellent speakers looking toward the future of science, while also acknowledging Jansen’s astonishing scientific career and his remarkable ability to achieve great things—always while being the nice, humble, and soft‑spoken Eystein we know.

Eystein Jansen and Kikki Kleiven at science celebration at Litteraturhuset in Bergen

“Eystein set a requirement for the celebration: he wants us to look forward, not backward. And in the spirit of Eystein, it will be a gathering that emphasizes relationships, intellectual exchange and the path forward, a celebration of a vibrant research community", said Dir. @BCCR Kikki Kleiven

UiB Rector Margareth Hagen with warm speech to Eystein Jansen

Eystein Jansen and Margareth hagen

Professor Eystein Jansen is certainly worth celebrating!

As Professor Eystein Jansen now turns 73 and becomes Professor Emeritus, the Bjerknes Centre for Climate Research, the Institute of Earth Science, and the University of Bergen hosted a grand 🧪 celebration in his honor

Multi-model isotope simulations reveal a unified picture of Earth’s… An international research team has completed the first fully standardized comparison of isotope-enabled climate models, demonstrating that a multi-model…

An international research team has completed the first fully standardized comparison of isotope-enabled climate models, demonstrating that a multi-model ensemble provides the most accurate representation of the present-day global water cycle.🧪🌊

bjerknes.uib.no/en/news/mult...

A Nordic Perspective on AMOC Tipping This report is the outcome of the Nordic Council of Minister’s sponsored workshop arranged in October 21-24, 2025 in Helsinki and Rovaniemi, Finland as part of Finland’s council presidency theme resil...

💡 A new Nordic report highlights the potential impacts of AMOC tipping and calls for stronger mitigation, monitoring and preparedness.

The report reviews the current state of science on the impacts of a potential AMOC collapse 🧪🌊

pub.norden.org/temanord2026...

What if farmers had seen it coming? The retrospective potential of extended-range forecasts in managing the 2018 drought in Norwegian agriculture Climate variability and extreme weather events pose substantial challenges to global agriculture, threatening food security and self-sufficiency. In N…

What if farmers had seen it coming?

The 2018 drought in Norway starkly highlighted the sector’s vulnerability to climate risks. This study investigates the potential benefits of extended-range forecasts, which were not available to farmers during the drought.🧪

www.sciencedirect.com/science/arti...

First-year sea ice history in the Arctic Ocean inferred from ancient DNA of Polerella glacialis over the past 50,000 years

Sea ice is a crucial component of the climate system. In this study, they use several high‑resolution methods to reconstruct past sea ice conditions from an Arctic sediment core.

They aim to improve understanding of how sea ice has changed over time 🧪🌊

www.sciencedirect.com/science/arti...

Remineralisation changes dominate oxygen variability in the North Atlantic Abstract. Oxygen is fundamental to ocean biogeochemical processes, with deoxygenation potentially reducing biodiversity, and disrupting biogeochemical cycles. In recent decades, the global ocean oxyge...

Oxygen is essential to marine life, but the amount of oxygen in the ocean has been decreasing in recent decades. This decrease is underestimated in numerical ocean models by as much as 50 %. 🧪🌊

os.copernicus.org/articles/22/...

Limited global effect of climate-Greenland ice sheet coupling in NorESM2 under a high-emission scenario Abstract. The Greenland ice sheet is melting at an accelerating rate due to the warming climate. In order to understand the potentially important ice-climate feedback processes, evolving ice sheets ne...

The Greenland ice sheet is melting at an accelerating rate due to the warming climate. In order to understand the potentially important ice-climate feedback processes, evolving ice sheets need to be included in global climate models. 🧪🌊

esd.copernicus.org/articles/17/...

Cities are essential for climate The majority of the world's population lives in cities. Providing cities with solutions to handle climate change improves both the global environment and…

"If you don’t show the potential, people will not see the possibility of taking action." @stefansobo.bsky.social from Bjerknes and @unibergen.bsky.social argues for also showing best case scenarios. bjerknes.uib.no/en/news/avgj...

Oligocene deep ocean oxygen isotope variations primarily driven by temperature - Nature Geoscience Large benthic oxygen isotope fluctuations in the Oligocene Southern Ocean primarily represent deep water temperature changes, suggesting the Antarctic ice sheet volume was relatively stable, according to a clumped isotope record.

For the first time, scientist discovered that the large up-and-downs in oxygen isotopes of the mid Oligocene were primarily driven by large temperature changes in the abyssal ocean and not, as previously assumed, to enormous changes in ice volume in Antarctica. 3/3

www.nature.com/articles/s41...

⚠️ However, one problem with the method is that it is not always easy to disentangle from the signal the contribution of temperature and that of ice volume. 2/3

By measuring the proportion of the heavy oxygen isotope in deep ocean marine calcite, scientist can understand climate variability in the geological past.

This is measured on the fossil shells of microscopic organisms that have lived on the ocean floor for hundreds of millions of years ago. 🧪🌊 1/3

Find the open access publication here: os.copernicus.org/articles/21/...

Photo of iceberg and text: New publication: Drivers of seasonal hydrography in Disko Bay, Greenland

Photo of Linda Latuta with scientific gear at the sea ice

Map of Greenland showing Disko bay in Western Greenland

Linda Latuta on sea ice with citation for the new publication

🌊 With two years of observations from the Disko Bay in Greenland, Linda Latuta et.al are out with a new publication - a milestone in the highly interdisciplinary 🧪Climate Narratives-project.

All photos: @islarsh.bsky.social

When Pacific Weather Shakes Atlantic Fisheries How El Niño and La Niña reach across the globe to impact fish populations thousands of kilometres away

When El Niño strikes in the Pacific Ocean, you might not expect fishermen off the coast of Senegal or Brazil to feel its effects. But they do, and in ways that are both surprising and complex, according to a new paper. 🧪 🌊

bjerknes.uib.no/en/news/nar-...

Shifting climates formed early human behavior. Congratulations to our new PhD, Karl Purcell who defended his thesis, "Reconstructions of southern South Africa hydroclimate during the last glacial cycle, and potential linkages to human behavioural development", at @unibergen.bsky.social today! 🧪

Lake sediments tell of past floods. Congratulations to our new PhD, Johannes Hardeng, who successfully defended his thesis, "Floods and avalanches in a changing climate" at @unibergen.bsky.social today! @josteinba.bsky.social

The cod has followed the thermometer In recent decades the cod stock in the Barents Sea has gone up and down with the ocean temperature. Future development depends on more than the water.

Barents Sea temperature and zooplankton explain variations in the cod population, new study from @unibergen.bsky.social, the Institute of Marine Research and the Bjerknes Centre shows. 🧪🌊 bjerknes.uib.no/en/news/skre...

Looking at freshwater in a new way Freshwater is quietly reshaping the oceans — and with it, the climate. A new study has looked at how rain, river runoff, and melting sea ice spread…

🌊 A recent study on freshwater sources in the global ocean.

🧪 @xabidavila.bsky.social and colleagues used a machine learning method to better understand how freshwater from rain and river runoff and from melting sea ice spreads through the ocean.

Full story👇
bjerknes.uib.no/en/news/look...