i2B - Into The Blue

This fall, two i2B expeditions, LAMEX 1 and KH7013, will head into the Arctic Ocean to uncover its warm climate past. Find out more: in2blue.eu/post/two-upc... #Arctic @paleodyn.bsky.social

🚁 Off the 79°N Glacier we picked up a year of Arctic data: seismometers that listen to calving ice, GNSS stations that measure Greenland rising as its ice melts. Then a 99.5 % solar eclipse over the sea ice, polar bears watching. 🐻‍❄️🌒 🔗 in2blue.eu/post/lamex-1... @paleodyn.bsky.social

☀️ We left Tromsø in sunshine. After a short stop off Longyearbyen, RV Polarstern is now heading west toward Greenland – 70 days of coring and surveying the Last Ice Area to find out how the Arctic behaved when it was 2°C warmer. 🧊 #ArcticOcean #Polarstern #i2B @paleodyn.bsky.social

After 35 unforgettable days at sea, the i2B expedition has come to an end. The team retrieved nearly 250 meters of sediment cores from key sites across the #Arctic Ocean — records that will help unravel the story of past warm climates. 🔗 Read chief scientist Jochen Knies’ reflection: arcg.is/0favaf0

✨ The power of teamwork in the Arctic ❄️🚢 From hauling heavy cores to processing samples, every task on R/V Kronprins Haakon depends on collaboration. Read @alexgag11.bsky.social reflections on how teamwork makes science possible: 🔗 arcg.is/0favaf0 📸 Norbert Nowaczyk @paleodyn.bsky.social

🚢 4 weeks at sea, 6,400 samples, and a record-breaking 22 m core ❄️🌊 The i2B team is piecing together the Arctic’s climate history, sample by sample — day and night. 🔗 Read co-chief scientist Stijn De Schepper’s update: arcg.is/0favaf0 📸 Tim Kalvelage @bjerknes.uib.no

🎨 The importance of colours ❄️🌊 From radar streaks in the ice to subtle shades in sediment cores, colours guide our work in the Arctic. The team even tested their soil colour charts on lab tools — try it yourself in @rhewlif.xyz Instagram quiz: www.instagram.com/rhewlif/ 🚢✨ 🔗 Blog: arcg.is/0favaf0

🚨 A small break from cruise updates to say that: We’re hiring! i2B is looking for a Postdoc in Arctic Marine Geology and Marine Geophysics. Find out more about the position here: www.jobbnorge.no/en/available... Please share with your networks 😊

🚢🔎 From hidden channels to towering seamounts, the i2B expedition is uncovering the Arctic seafloor in remarkable new detail. Read more about our findings in our latest blog written by @rhewlif.xyz : 🔗 arcg.is/0favaf0

We dropped in on Santa Claus at the north pole this week to get our wish lists in early! To celebrate reaching 90N - the first time unaided for the Kronprins Haakon - we had ourselves a BBQ followed by a football match on the ice.

Keep track of our @i2b-erc.bsky.social expedition updates below as we continue our journey towards northeast Greenland.

As mentioned in this interview with our cruise leader, Jochen Knies, the ease with which we reached the pole was unthinkable 30 years ago when he last visited. "Reading about it is one thing - witnessing it firsthand is something entirely different" @i2b-erc.bsky.social

🎉❄️The i2B Expedition Team has reached the North Pole 🚢🌍 Today, the i2B expedition celebrated its halfway point at the most symbolic place imaginable: the North Pole. Read more about our stop: 🔗 arcg.is/0favaf0 @paleodyn.bsky.social @bjerknes.uib.no 📸 @rhewlif.xyz

💧 Unlocking secrets in pore water ❄️ Hidden between grains of Arctic sediment, pore water reveals how sediments change over time. With just a few milliliters, Denise and Male are helping sharpen our reconstructions of past Arctic climates. 🚢✨ 🔗 arcg.is/0favaf0 @paleodyn.bsky.social

💭 Read the reflections of @paleodyn.bsky.social PhD student @alexgag11.bsky.social, who traded screens for the Arctic Ocean. Aboard R/V Kronprins Haakon, he cut open sediment cores holding thousands of years of history and sampled water from 4000m below. 🚢❄️ 🔗 arcg.is/0favaf0

❄️ One week at sea, and life aboard R/V Kronprins Haakon has settled into a rhythm of 24/7 science. Six long sediment cores, countless samples — and our first real test in the Arctic sea ice. 🚢 🔗 arcg.is/0favaf0 @paleodyn.bsky.social

One week into the @i2b-erc.bsky.social cruise and sediment cores are coming in thick and fast, guided by some fantastic sub-bottom profiler data. The question is, how old are these sediment layers?

🦇 Ping… ping… ping… just like a bat in the night, our ship uses sound to “see” beneath the Arctic seafloor. These echoes guide us to the best coring sites and help us avoid hidden obstacles — each profile a map to sediments laid down during ancient ice ages. ❄️🌊 🔗 arcg.is/0favaf0 @rhewlif.xyz

✨🔬 Imagine holding thousands of years of Arctic history on the tip of a brush… That’s exactly what the Micropaleontology Team* does each day aboard R/V Kronprins Haakon. 🔗 Read the full blog here: arcg.is/0favaf0

✨ Our first expedition blogs are now live! ✨ 🚢 Step aboard the R/V Kronprins Haakon and follow the expedition team as they settle into life at sea and gear up to collect their very first long sediment cores from the Arctic seafloor. 🔗 arcg.is/0favaf0 @paleodyn.bsky.social @bjerknes.uib.no

What were the impacts of an ice free Arctic Ocean in the past? Follow our progress and updates via the @i2b-erc.bsky.social cruise blog below

An exciting expedition awaits! Our home for the next 5 weeks as we head into the frozen Arctic Ocean to collect new palaeo archives.

✨ Our first expedition blogs are now live! ✨ 🚢 Step aboard the R/V Kronprins Haakon and follow the expedition team as they settle into life at sea and gear up to collect their very first long sediment cores from the Arctic seafloor. 🔗 arcg.is/0favaf0 @paleodyn.bsky.social @bjerknes.uib.no

Did you know that the i2B (@i2b-erc.bsky.social) Arctic Ocean Expedition is departuring tomorrow to unveil the secrets of the past Arctic greenhouse climates? And you can follow the amazing team of scientistis onboard in the blog created for the expedition: arcg.is/0favaf0

As the Arctic advances toward ice-free “blue” summers, understanding its past is critical, write scientists from @uitnorgesarktiske.bsky.social @i2b-erc.bsky.social @stockholm-uni.bsky.social & @uqam.ca. eos.org/science-upda...

Sediment and climate model evidence indicate the Arctic Ocean maintained seasonal sea ice and open water during past ice ages, supporting marine life even in the coldest periods of the last 750,000 years. doi.org/g9sch7

Making sense of geological data describing how the Arctic has responded to past climatic changes is essential for understanding how the region will evolve in the coming decades.

🧊🌊 A new article in EOS explores how the scientific community is coming together to better understand past Arctic climates – and why it matters today. This topic is at the heart of our ERC project i2B - Into The Blue, as we aim to resolve the Arctic's ancient greenhouse climate puzzle.

🌍 i2B at the final PalaeoArc Conference ❄️ Last week in Tromsø, i2B team members joined the 6th & final #PalaeoArc — sharing Arctic science through talks and posters, and helping organise too! Great science + great people = fantastic conference! 👏 More info: site.uit.no/palaeoarc2025/

🌍 i2B is at #EGU25! It’s been an exciting week at @egu.eu! On Mon, i2B co-PI Petra Langebroek presented our poster in the well attended session "Arctic Ocean, Surrounding Lands and Gateways across Time Scales: from Past to Future". Great discussions, great connections—Arctic science at its best! 🌊❄️

Paleodyn's contribution to #EGU25 on Tuesday, 29 April, starts with the oral presentation of our PhD Candidate, Fernanda Matos (@fdaomatos.bsky.social). She will talk about the calculation of the AMOC in density space, and how it becomes crucial in warmer climates, using our AWI-CM3 model.

In session OS1.8, on Monday, 28 April , at 12:05–12:25, in room 1.61/62, Dr. Lohmann will give an oral presentation on the many lessons we can learn from studying past Arctic warm climates. He is one of the leaders of the exciting @i2b-erc.bsky.social project, that focuses in the Arctic!

Future research could explore a high-resolution ocean model setup including ice-shelf cavities and/or incorporating dynamic ice sheets, flexible cavity shapes, and iceberg calving. This article is essential to understand future Antarctic Ice Sheet mass loss and sea-level rise!

The study highlights the critical role of cryosphere−hydrosphere interactions in the Earth's system, particularly due to the implementation of ice cavities in the model, which reduces considerably the model mismatch with observations in relation to the Southern Ocean dynamics.

3. Antarctic ice-shelf cavities adjust the Antarctic Bottom Water formation sites and enhance Southern Ocean dynamics by introducing ice-shelf meltwater.

2. Local hydrographic and topographic conditions play a decisive role in an ice-cavity tipping point, characterized by abrupt warm-water intrusion, rapid basal-melt increases, and massive freshwater release.

They reveal that: 1. With Antarctic ice-shelf cavities, high-emission scenario projections demonstrate accelerated Antarctic basal melt and freshwater discharge, which were ignored in previous Earth System Modeling studies!

The authors implemented Antarctic ice-shelf cavities into AWI-ESM2, which in itself is a huge challenge for the climate modelling community. They conducted CMIP6 (@wcrp-cmip.org) Pre-Industrial, Historical and SSP simulations and propose this work as prototype for the upcoming CMIP7 project.

The groundbreaking study led by Dr. Pengyang Song is out today in @natclimchange.bsky.social! In his article, Dr. Song and co-authors investigate the response and feedback of ice cavities under a changing climate using the AWI Earth System Model AWI-ESM2. www.nature.com/articles/s41...

🧪 Our new leader for climate hazards: Stijn De Schepper 👋 Stijn is interested in how past warm climates looked like and developing new cross-disciplinary approaches to read the paleoclimate record. He is also leading the ERC Synergi Grant @i2b-erc.bsky.social bjerknes.uib.no/en/news/new-... 👇

Exciting new position is now open! Come and work with i2B 🤩

Exciting new position is now open! Come and work with i2B 🤩

Thanks to a follower suggestion, I've added a visualization showing the mean #Arctic sea ice extent for each summer season (June-September). This can be a way of tracking whether each region is becoming seasonally ice-free. Graphic will be updated annually at: zacklabe.com/arctic-sea-i... 🌊

Friday ice update - #Arctic sea ice extent is currently the 5th lowest on record (JAXA data) • about 320,000 km² below the 2010s mean • about 720,000 km² below the 2000s mean • about 1,170,000 km² below the 1990s mean • about 1,640,000 km² below the 1980s mean Plots: zacklabe.com/arctic-sea-i... 🌊

Happy World Glacier Day!! As we enter into the International Year of #Glacier Preservation, we must: - redouble efforts to scale up political ambition for widespread emissions reductions - fight to prevent every tenth of a degree of warming - Ensure countries submit 1.5C aligned NDCs at COP30