πWhere 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 π½
@bjerknes.uib.no @mariusarthun.bsky.social @kristoferdoos.bsky.social @nansensenteret.bsky.social @noc.ac.uk
New paper alert π¨ π
The Southern Ocean and the Arctic are freshening. In our new paper we link, for the first time, such freshening to sea ice decline through salinity and stable oxygen isotopes observations and machine learning techniques.
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Finally, our unique dataset of combined water isotope and aerosol/INP observations from the ISLAS2021 field experiment at Andenes has been made public in the pangeaa database! Thanks to all who contributed, and stay tuned for the ISLAS2021 data paper! @erc.europa.eu
doi.pangaea.de/10.1594/PANG...
Good news for the Gulf Stream! A study from @unibergen.bsky.social, the Bjerknes Centre and @ox.ac.uk indicates that the Arctic Ocean compensates for less deep water formation farther south. @mariusarthun.bsky.social @ailinbrakstad.bsky.social @jakobdoerr.bsky.social
Want to collect air with drones? Check out a "tools of the trade" article in @natrevearthenviron.nature.com by Kevin Rozmiarek www.nature.com/articles/s43...
He & his fellow grad students were encouraged to write about their work by Nature editor Graham Simpkins, who visited INSTAAR this Spring ππ½
Two foxes in dry grass in early morning sun in London's Burgess Park
Without our continued burning of fossil fuels, the current heat in London & most of the UK would not have been a heatwave: www.worldweatherattribution.org/climate-chan... Heatwaves are dangerous. Drink water, lots of it, stay cool, even if you feel invincible, you're probably not.
Wer zieht die Strippen hinter Trump und Vance, und was ist sein Plan?
Sehr wichtiger und hervorragend gemachter Podcast vom Deutschlandfunk, den jeder kennen sollte:
www.deutschlandfunk.de/die-peter-th...
Happy to share our paper in βͺ@science.orgβ¬ 'Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models' | Science www.science.org/doi/10.1126/...
π¨π’ New Publication Alert
Our new study shows that the #WestAntarctic #IceSheet repeatedly crossed #TippingPoint thresholds in the past, with important implications for its future stability.
Press release: www.pik-potsdam.de/en/news/late...
Study: www.nature.com/articles/s43...
ππ§βοΈπ§ͺπ₯Ό
π§ͺ π π We are celebrating Dr. InΓ¨s Ollivier today - successfully defending her thesis "βImpact of Surface Processes on the Antarctic Water Isotope Climate Signal"
Here with supervisor, Professor Hans Christian Steen-Larsen.
Adam Odorisio poses with his INSTAAR community award.
Gifford Miller presents an INSTAAR graduate student community award to Kevin Rozmiarek.
ππ½ Congrats to ADAM ODORISIO & KEVIN ROZMIAREK! They're the winners of this year's INSTAAR Graduate Student Community Awards.
See their commendations & our other INSTAAR award winners www.colorado.edu/instaar/2025...
π Interested in a phd position in physical oceanography? Try beautiful Bergen! tinyurl.com/Phd-oceanogr...
Au revoir Paris! π₯ Three inspiring workshop days at #LSCE and a great start for the #ISOSAM team to do a French-Norwegian comparison of our #stablewaterisotope modelling efforts in polar #snow βοΈπ§
#NFR #AURORA π³π΄ #CampusFrance π«π·
@lsce-ipsl.bsky.social @unibergen.bsky.social
Sonja Wahl from @unibergen.bsky.social giving a crash course on the #d-excess in our lecture series on #stablewaterisotopes at #ITP in #Beijing.
#CAS #ANSO-fellowship
My magnificent colleague Sonja Wahl kicking off the lecture series we will give on #stablewaterisotopes at the Institute for Tibetan Plateau Research #ITP. π§ͺ
Big thanks to our host Prof. Jing Gao during our ANSO visiting fellowship Chinese Academy of Science #CAS in #Beijing! π
Box for pickup of complete kits
Organising collection
Assembling the pouches and instructions
Assembling the #ISOSCAN sampling kit @bjerknes.uib.no
π§ͺ There is an available position as a postdoc at NORCE in paleo climate modelling in Bergen.
βοΈ The focus is on investigating the Arctic region during past warm climates using NorESM, and is part of the ERC granted @i2b-erc.bsky.social
Read more and apply here π
www.jobbnorge.no/en/available...
π§ New ice core study of the last ice age by Chloe Brashear, Tyler Jones et al. suggests abrupt warming events were preceded by periods of unusually stable temperatures. Shifting sea ice is a potential driver of the phenomenon.
Read our story: www.colorado.edu/instaar/2025...
Great news in tricky times for climate and environment! π±
Scandinavia's largest public transport operator #Nobina teams up with #STABL_Energy to reuse old e-bus batteries for energy storage πβ»οΈ shorturl.at/CiADb
And my brother is one of the four epic #STABL co-founders! π€©π
stabl.com #proudsister
Thanks for a stimulating exchange with #GlacierScientist @bekkz.bsky.social, who is investigating the sensitivity of #Folgefonna to #climatechange in her doctoral thesis. π€ Folgefonna is Norway's third largest glacier.
Compagno et al. (2021) project that the Scandinavian glaciers will lose at least 67 Β± 18%, but possibly 90 Β± 7%
of their present-day volume, dependent on how much CO2 we emit until 2100. π§π§
doi.org/10.1017/jog.... π§ͺ
π There's a new preprint by Henning Γ
kesson and peers that looks at the future evolution of Jostedalsbreen. Being the largest ice cap in Europe, Jostedalsbreen is more resilient than many smaller glaciers, but strong melting will likely split it into three parts.π
doi.org/10.5194/egusphere-2025-467π§ͺ
High-resolution satellite imagery allowed Andreassen et al. (2022) (doi.org/10.1017/jog.2022.20) to map and count Norwegian glaciers more precisely. They estimate the current glacier area to be 2328 Β± 70 km2, but their extent is rapidly shrinking (Nesje 2023, doi.org/10.1177/09596836231183069) ποΈπ§ͺ
The picture shows a mountaineous Norwegian landscape with steep and jagged mountain tops on an overcast day. There's almost no vegetation apart from a bit of moss and the ground. The foreground shows a scree field and side ice patches of glacier SkΓ₯labreen are visible. The picture shows the view from the top of Mt SkΓ₯la towards glacier Jostedalsbreen. A branch of Jostedalsbreen, Ramnefjellsbreen, hangs on top of Mt Ramnefjell. The picture is taken in August 2024, thus all snow has melted and it's branches and cracked ice eges are nicely visible. The glaciers fingers reach down a steep wall of Ramnefjell which ends in lake Lovatnet that has a magnificent turqoise color. In the background rises the vast, smoothly shaped expanse of the main part of Jostedalsbreen. The scenary looks very majestetic as it combines the stunning view of steep and rough mountains, glaciers, turquoise waters, and a heterogeneous cloudy sky with deep contrasts.
Let me share a picture of marvelous #Jostedalsbreen on today's #WorldDayForGlaciers. π«
#Norway is rich in glaciers and ice caps, but their number is likely to reduce by 98% by the end of the 21st century. ππ§΅
Are Norway's #fossifuels truly a source of wealth or rather a threat to it? #ClimateAction
Nesje et al. (2008) estimated that about 98% of the Norwegian glaciers will likely melt by the end of the 21st century, from 1627 glaciers to only 27, with a decrease in area to roughly one-third. π§ͺ
doi.org/10.1016/j.gloplacha.2006.08.004
We have a new paper now online in the Annual Review of Earth and Planetary Sciences with a group of amazing ECR coauthors reviewing methods and applications of (offline) paleoclimate data assimilation and looking toward the future www.annualreviews.org/content/jour...
There's a preprint online, but best is to request the full text from Kevin on RG!
www.researchgate.net/publication/...
ππ½ Congrats to grad student KEVIN ROZMIAREK & his int'l research team, for their first-of-its-kind data & analysis of atmospheric water-vapor isotopes above an ice sheet!
Their work has implications for vapor transport, ice cores, & more. Read this thread from coauthor Laura Dietrich (U of Bergen)ππ½
πKevin Rozmiarek led this great #TransatlanticScience teamβ€οΈβπ₯:
Dietrich, Vaughn, Town, Markle, Morris, Steen-Larsen, @xavierfettweis.bsky.social, Brashear, Bennet, Jones
@instaar.bsky.social @cubouldearth.bsky.social @unibergen.bsky.social @bjerknes.bsky.social @earthspaceresearch.bsky.social #ULiège
A unique dataset gives unique opporunities π« We evaluate the vertical performance of the well-established polar climate model #MAR at two vertical resolutions. The model does a good job, but clearly, a high vertical resolution towards the surface is crucial above the ice sheet!
