Claas Hiebenthal

Scientists no Longer Find Twitter Professionally Useful, and have Switched to Bluesky Synopsis. Social media has become widely used by the scientific community for a variety of professional uses, including networking and public outreach. For

Bluesky is the new science Twitter, new study by @whysharksmatter.bsky.social and Julia Wester concludes!

"Results show that for every reported professional benefit that scientists once gained from Twitter, scientists can now gain that benefit more effectively on Bluesky than on Twitter."

Want to study connectivity of brownalgal populations & carbon budgets in the Baltic Sea? Join our #ROVKA team within the new algal adaptation group led by @lies-nerd.bsky.social at @geomarkiel.bsky.social in collaboration with @bfn-de.bsky.social and @univie.ac.at, www.geomar.de/en/karriere/...

Dear #ICYMAREfamily,
We’re excited to announce that the #CallForSessions for #ICYMARE2026 is now open! 
This is your chance to host a session and shape the next ICYMARE conference! 🐳🦑🌏
www.icymare.com/about-the-co...

The marine conservation group @hifmb.de is looking for a postdoc and a Phd student to study coral genomics and conservation genetics. Join us to develop solutions for coral conservation and dive into the world of early branching metazoans: Deadlines coming up fast. jobs.awi.de/Vacancies/21...

🌊 GEOMAR in der #Tagesschau
Vor Santorini testete ein internationales Team an Bord der METEOR neue Beobachtungssysteme für ein besseres Frühwarnsystem. ARD-Korrespondent Moritz Pompl besuchte die Forschenden an Bord.
➡️ www.tagesschau.de/ausland/euro...
📸 Jens Karstens
#UnsereWeltistderOzean

Eine Kranzwasserschöpfer wird von einem Forschungsschiff ins Wasser gelassen. Das Meer ist von Eis bedeckt, der Himmel ist blau.

A new GEOMAR-study demonstrates that the “age” of water masses in the North Atlantic has been increasing continuously since the 1990s – an indication of a weakening of the Atlantic circulation system.

🔗 www.geomar.de/en/news/arti...

📸 R. Abel, GEOMAR

Scotland has world’s greatest wind capacity per head of population in the World but uses it to benefit England The above table is not clearly linked to its source. I’ve asked and will update when I get it. As you are aware, the above is doing nothing for our energy bills, the highest in the UK and in …

Scotland has world’s greatest wind capacity per head of population in the World but uses it to benefit England talkingupscotlandtwo.com/2026/01/23/s...

Hitchiking in the ocean? 👍

A new study, including WHOI, traced oil-covered trash from the shores of Florida to a 2019 spill in Brazil! It shows that oil can hitch a ride on plastics to travel thousands of miles from where it was spilled.

More from @agu.org ’s EOS: go.whoi.edu/eos-oil

Nine EU nations to join forces on 100 GW of North Sea wind Nine countries, including the UK and Germany, will pledge to jointly develop 100 GW of offshore wind in the North Sea, Bloomberg reports.

Nine countries, including the UK, Germany, and the Netherlands, will pledge to jointly develop 100 GW of #offshorewind in the North Sea and step up protection for critical infrastructure. North Sea countries are aiming to achieve 300 GW by 2050 electrek.co/2026/01/23/n... #ActOnClimate #Renewables

I am a climate scientist and this is correct.

As the planet warms, storms like the one today are getting stronger… and as the Arctic is warming twice as fast as the mid latitudes, it increases the risk of the “freezer door” swinging open.

Technical explanation here: www.pnas.org/doi/10.1073/...

UN-Bericht warnt vor globalem "Wasserbankrott" Seen, Feuchtgebiete, Gletscher: Viele Wasserreserven sind erschöpft und für den Menschen unwiederbringlich verloren, warnt ein UN-Bericht. Die Vereinten Nationen mahnen, jetzt entschlossen zu handeln....

Verlust von WasserreservenUN warnen vor globalem "Wasserbankrott"

Seen, Feuchtgebiete, Gletscher Viele Wasserreserven sind erschöpft und für den Menschen unwiederbringlich verloren, warnt ein UN-Bericht. Die Vereinten Nationen mahnen, jetzt entschlossen zu handeln

www.tagesschau.de/wissen/klima...

Dem Nordatlantik geht die Luft aus Luftnot im Ozean: Das Tiefenwasser des Nordatlantiks wird immer schlechter belüftet – es fehlt an Frischwasser, wie Messungen belegen. Demnach dauert es

Kollaps der Ozeane: Nicht nur dem Nordatlantik geht die Luft aus

Sauerstoffgehalt in der Tiefe nimmt immer weiter ab

„Die abnehmende Belüftung des Tiefenwassers scheint ein globales Phänomen"

Todeszonen breiten sich in den Ozeanen aus & verstärken #Artensterben & #Klimakollaps

#Klimakatastrophe

Antarctica in 2025: Drivers of deep uncertainty in projected ice loss Antarctica is a vital component of Earth’s climate system, influencing global sea level, ocean circulation, and planetary albedo. Major knowledge gaps in critical processes—spanning the atmosphere, oc...

Antarctic ice plays a crucial role in regulating Earth’s climate, global sea levels, ocean circulation, and planetary reflectivity.

Learn more in this 2025 #ScienceReview: https://scim.ag/493YlDy #ScienceMagArchives

‘A serious problem’: peer reviews created using AI can avoid detection Tools fail to identify most AI-generated peer-review reports, say researchers, who warn that the issue is only getting worse.

Tools fail to identify most AI-generated peer-review reports, say researchers, who warn that the issue is only getting worse.

go.nature.com/44SntdQ

Southern Ocean’s Heat Storage – a Possible Cause of Future ‘Heat Burps’ 20 November 2025 / Kiel. So far, the ocean has helped to buffer global warming by absorbing more than 90 per cent of the excess heat trapped in the Earth system by the anthropogenic greenhouse effect....

A GEOMAR study has revealed that heat accumulated in the ocean may be released once more from the depths of the Southern Ocean, following centuries of atmospheric cooling after the reversal of anthropogenic global warming — possibly as a large “heat burp”— and warm the atmosphere once more.

A study by an international team involving GEOMAR shows that the expansion of Antarctic Bottom Water during a major warming phase around 12,000 years ago displaced a carbon-rich mass of deep-water in the Atlantic sector of the Southern Ocean.
🔗 www.geomar.de/en/news/arti...
📸 Huang Huang, GEOMAR

Nur „Guter Fisch“ auf den Tisch. 🐟 In diesem Jahr ist die gemeinsame Liste der Deutschen Umwelthilfe, GEOMAR, NABU, WWF und der Verbraucherzentralen etwas länger geworden, doch an vielen Stellen ist noch Vorsicht geboten.

🔗 Für den nächsten Einkauf: www.geomar.de/fileadmin/co...
📸 GEOMAR

#GEOMARJobs

🌊 Ship Coordinator (f/m/d) permanent - full-time

🌊 Scientific researcher (m/f/d) on satellite remote
sensing of marine/ocean phytoplankton

🌊 Zwei Ausbildungsplätze zum:zur Chemielaborant:in

🔗 www.geomar.de/en/karriere/...

amazing footage!

During Dive 878, the #ArgentinianDeepSeeps science team studied & sampled an active pockmark on the seafloor, where liquids & gases were escaping. Their goal: the first & most comprehensive exploration of cold seeps, one of the least-studied deep-ocean ecosystems in SW Atlantic.

Merry Christmas! 🎄

TV-Moderator Steffens: "Größte Eselei der Konservativen" Die Klimakrise ist nicht mehr so präsent, weil Kriege und Wirtschaftskrisen sie überdeckt haben. Verschwunden ist sie aber nicht. TV-Moderator Dirk Steffens erklärt, warum den Menschen so schwer fällt...

#COP25, #Klimakrise, #NoAfD

Starkes Interview mit Dirk Steffens:
web.de/magazine/pol...

If someone tells you the CO2 is coming out of the sea, they try to fool you. We know exactly where it comes from and where it goes. We emit CO2, about half of that stays in the atmosphere, and a quarter each is taken up by oceans and forests.
Measured facts!
globalcarbonbudget.org/gcb-2025/

Diesen Freitag, 21.11.25: Lange Vorlesungsnacht an der CAU Kiel @uni-kiel.de. ✨

Vom GEOMAR ist Klimawissenschaftler Prof. Dr. Stefan Juricke mit dem Thema "Von Klimaangst zu Zukunftsmut: Perspektiven eines Klimawissenschaftlers" dabei.

🔗 www.uni-kiel.de/de/veranstal...

Bundesweites Böllerverbot, jetzt!
Bitte teilen 🥳

innn.it/boellerverbot

Meeresbiologe Froese - „Den Dorsch haben wir verloren“ Der Ostsee-Dorsch ist vom Aussterben bedroht: Meeresbiologe Froese warnt, doch trotz gefährdeter Bestände gibt es Widerstand gegen strengere Fangquoten.

„Mit den jetzt beschlossenen Fangmengen haben wir den Dorsch wohl verloren“, sagt Rainer Froese vom GEOMAR. Er bezieht sich dabei auf den Beschluss des EU-Ministerrats, der jährlich die Fangquoten für die Fischerei der EU-Mitgliedsstaaten festlegt.

www.deutschlandfunk.de/eu-fangquote...

Carnivorous ‘death ball’ sponge among new species found in depths of Southern Ocean Researchers previously took first confirmed footage of a juvenile colossal squid in scarcely explored habitat

🌊 Carnivorous ‘death ball’ sponge among new species found in depths of Southern Ocean

www.theguardian.com/environment/...

🎥 Wie jagt eigentlich ein #Seehund? Die Robben-Kamera – eine sogenannte Seal-Cam deckt auf und zeigt einzigartige Einblicke! Mehr zu Seehunden, der #Nordsee und vielen weitere Welten gibt´s im interaktiven #Weltozean zu entdecken – taucht ein! 🤿 weltozean.de?token=8Zly5G...

Belgium top of the class in recycling plastic waste Belgium stands out as one of the EU’s recycling champions, standing head and shoulders above many of its neighbours.

#Belgium stands out as one of the EU’s #recycling champions. The country recycled 59.5% of all plastic #packagingwaste, comfortably ahead of the EU average of 42.1% and far surpassing its 2013 level of 38.2% www.brusselstimes.com/environment/... #plasticwaste #oilandgas #ActOnClimate #waste

Students on board RV Alkor in the Baltic

Students on Alkor with ROV

Students on Alkor with Corer

Sediment core with microelectrodes to profile oxygen in board RV Alkor

First cruise with our new M.Sc. students in Biological Oceanography @geomarkiel.bsky.social @uni-kiel.de to sample sediment cores for organic carbon & DNA, image ammunition dumpsites and investigate macrofauna! Thanks to Jens Greinert, Mirjam Perner and teams - and the excellent crew of RV Alkor