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Reposted by Paleoclimate Dynamics

Alessandro Gagliardi @alexgag11.bsky.social · 13/05/2026

🔬In our new study, my first-author paper, we investigated whether Greenland ice cores could provide information about the occurrence of extreme winter events in Europe. ✅ Short answer: Yes, they do. 📄Read the study (open access, no paywall) cp.copernicus.org/articles/22/... 🧵Long answer ⬇️

cp.copernicus.org

Northern Greenland transect stacked ice cores as a proxy for winter extreme events in Europe

Abstract. High-resolution ice core records from the Greenland ice sheet provide critical insights into past climate variability across seasonal to multidecadal timescales. A key proxy in these reconst...

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Paleoclimate Dynamics @paleodyn.bsky.social · 08/04/2026

If you want to learn more, see also our press release: 🔗 www.awi.de/en/about-us/... #Antarctica #ACC #paleoclimate #climatemodel 📸 Knahl et al., 2026, PNAS. CC BY 4.0

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Paleoclimate Dynamics @paleodyn.bsky.social · 08/04/2026

We simulated the Southern Ocean 33.5 million years ago. At that time, the global climate was transitioning from a greenhouse 🌴 to the icehouse climate 🧊 and ocean gateways around Antarctica (Drake Passage and Tasman Gateway) were opening. A lot was changing at the same time 🤹

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Paleoclimate Dynamics @paleodyn.bsky.social · 08/04/2026

Today, it is 'fully grown' to the most powerful ocean current on earth 💪 Hanna Knahl and colleagues (@awi.de @nick-golledge.bsky.social @imas-utas.bsky.social) show that the Tasman Gateway, had to open much wider than some studies previously assumed to develop a full Antarctic Circumpolar Current 🐳

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Paleoclimate Dynamics @paleodyn.bsky.social · 08/04/2026

Check out our exciting new study about the Antarctic Circumpolar Current in its infancy! 🔗 doi.org/10.1073/pnas... 📸 Knahl and Scholz

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Reposted by Paleoclimate Dynamics

i2B - Into The Blue @i2b-erc.bsky.social · 02/09/2025

🎉❄️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

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Reposted by Paleoclimate Dynamics

i2B - Into The Blue @i2b-erc.bsky.social · 28/08/2025

💭 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

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Paleoclimate Dynamics @paleodyn.bsky.social · 19/08/2025

This study paves the way for deeper insights on the causality and co-occurrence of climate change at short timescales, utilizing their intricate combination of statistical and dynamical methods. We are excited to see more studies like this in the future, though definitely not more heatwaves!

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Paleoclimate Dynamics @paleodyn.bsky.social · 19/08/2025

With a novel integration of statistical methods, the authors established both co-variability and causality of the compound influence of atmospheric blocking, exceptional sunshine duration, depleted soil moisture, and elevated nighttime temperatures, in driving this extreme event. 🧵

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Paleoclimate Dynamics @paleodyn.bsky.social · 19/08/2025

This study, authored by Dr. @moniionita.bsky.social and Dr. Viorica Nagavciuc from Paleodyn, Dr. Petru Vaideanu from University of Suceava, and Denis Nichita from University of Bucharest, emphasize the increasing vulnerability of Eastern Europe to extreme heat events 🧵

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Reposted by Paleoclimate Dynamics

i2B - Into The Blue @i2b-erc.bsky.social · 18/08/2025

✨ 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

arcg.is

i2B Arctic Ocean Expedition 2025

Collecting new geological archives that will reveal past Arctic climate secrets

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Paleoclimate Dynamics @paleodyn.bsky.social · 15/08/2025

We are excited to follow our first expedition and invite you to do so with us here at our profile, at @i2b-erc.bsky.social, and at the blog (arcg.is/0favaf0). Safe travels and stay tuned!!

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Paleoclimate Dynamics @paleodyn.bsky.social · 15/08/2025

Our PaleoDyn member, @alexgag11.bsky.social is going to be onboard of the Norwegian RV Kronprins Haakon and we will bring updates here on the expedition through his unique viewpoint. Fun fact? He has already spotted the RV Polarstern around Longyearbyen.

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Paleoclimate Dynamics @paleodyn.bsky.social · 15/08/2025

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

storymaps.arcgis.com

i2B Arctic Ocean Expedition 2025

Collecting new geological archives that will reveal past Arctic climate secrets

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Paleoclimate Dynamics @paleodyn.bsky.social · 21/07/2025

This study represents a major milestone in for the next generation of storm-resolving global climate models and addresses near-surface processes and modes of variability in outstanding detail. We invite you all to read this amazing work, published in Earth System Dynamics.

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Paleoclimate Dynamics @paleodyn.bsky.social · 21/07/2025

The simulations were able to resolve climate with local granularity, particularly mesoscale activity. Additionally, the time-slice/transient protocol introduces a significant reduction in computational cost and memory footprint in comparison to regular transient simulations.

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Paleoclimate Dynamics @paleodyn.bsky.social · 21/07/2025

The authors used the AWI inhouse developed model, AWI-CM3, with an iterative methodology to assess the sensitivity of future climate change projections to ultra-high resolution. The insights gained more than justified the substantial investment in both human and technical resources.

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Paleoclimate Dynamics @paleodyn.bsky.social · 21/07/2025

Paper Alert 🚨 How about looking at the Earth at a super fine resolution? We made it! In the article led by Dr. Ja-Yeon Moon in collaboration with Paleodyn members, the Earth's future climate and variability was simulated at 9 kilometer global resolution! Link: esd.copernicus.org/articles/16/...

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Paleoclimate Dynamics @paleodyn.bsky.social · 14/05/2025

If you want to know more about climate extremes' research in PaleoDyn's group, freel free to follow us and Alessandro's profiles here on bluesky - @alexgag11.bsky.social. There is more interesting research coming up!

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Paleoclimate Dynamics @paleodyn.bsky.social · 14/05/2025

The question still remains regarding future climate change, as model results disagree on the ENSO response to anthropogenic forcing in the near- to long-term future. However, this article already gives us essential clues on how MHV events can be affected and the global ecological consequences of it!

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Paleoclimate Dynamics @paleodyn.bsky.social · 14/05/2025

The #ENSO influence on #MHVs still challenges the scientific community. The study, led by Jakob Gunnarson from the University of Hawaii, focuses on MHVs since 1960 and reveals that the El Niño event of 2023-2024 significantly contributed to the record-setting MHWs that occurred during this period.

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Paleoclimate Dynamics @paleodyn.bsky.social · 09/05/2025

Furthermore, Yugeng has explored LGM deep water formation focusing on the importance of tidal mixing to the AMOC strength in his publication to the Climate of the Past journal last year. We recommend you also to read this paper! cp.copernicus.org/articles/20/... 🧵(5/5)

cp.copernicus.org

Glacial AMOC shoaling despite vigorous tidal dissipation: vertical stratification matters

Abstract. During the Last Glacial Maximum (LGM), tidal dissipation was about 3-fold higher than today, which could have led to a considerable increase in vertical mixing. This increase might have enha...

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Paleoclimate Dynamics @paleodyn.bsky.social · 09/05/2025

This work features a collaboration with Paleodyn scientists Dr. Pengyang Song and Dr. Gerrit Lohmann, and Dr. Xianyao Chen from Ocean University of China. 🧵(4/5)

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Paleoclimate Dynamics @paleodyn.bsky.social · 09/05/2025

The authors uses our FESOM2 model with tidal mixing parameterization to derive present-day and LGM quasi-equilibrium simulations. They focus on the Atlantic to derive their analyses and find that sea ice production and mixing rates play an essetial role in AABW strenghtening during LGM! 🧵(3/5)

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Paleoclimate Dynamics @paleodyn.bsky.social · 09/05/2025

The AABW is essential for the global ocean ventilation as it travels from the bottom of the Southern Ocean to the other ocean basins! During LGM, its formation is deemed to be amplified, even though the magnitude and mechanisms driving AABW strengthrening are under debate. 🧵(2/5)

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Paleoclimate Dynamics @paleodyn.bsky.social · 01/05/2025

We invite you to his oral presentation to session CL4.9 on Friday, 02 May, at 10:45 in room 0.49/50!

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Paleoclimate Dynamics @paleodyn.bsky.social · 01/05/2025

Dr. Streffing's work is done in collaboration with Dr. Laszlo Hunor Hajdu and Dr. Gerrit Lohmann from PaleoDyn, Dr. Thomas Jung from CliDyn, Dr. Paul Miller, Dr. Lars Nieradzik, and Dr. Martin Lindahl from Lund University, Dr. Philippe le Sager from @knmi.nl, and Dr. Uwe Fladrich from SMHI.

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Paleoclimate Dynamics @paleodyn.bsky.social · 01/05/2025

The newer generation of our inhouse developed model, that is suitable for paleoclimate research, will count with openIFS cycle 48r1 as the atmospheric component, FESOM2/RECOM as ocean and biogeochemistry components, include dynamic vegetation, and more updates.

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Paleoclimate Dynamics @paleodyn.bsky.social · 01/05/2025

Developing Earth System Models is essential for climate research as they are to represent more components of the Earth System than climate models of lower complexity. However, it is not an easy task! Dr. Jan Streffing, the developer of AWI-CM3, will show at #EGU25 the work of building AWI-ESM3.

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Paleoclimate Dynamics @paleodyn.bsky.social · 30/04/2025

We invite you to his oral presentation to session ITS2.1/CL0.1, on Friday, 02 May, at 09:05 in Room 2.24!

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Paleoclimate Dynamics @paleodyn.bsky.social · 30/04/2025

In his study together with Dr. @moniionita.bsky.social from PaleoDyn and Dr. Yumeng Chen, from @nceoscience.bsky.social, he focuses on the Wet-Bulb Temperature indicator for European summer, using observations and reanalyses. Their findings are essential to future climate change adaptation!

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Paleoclimate Dynamics @paleodyn.bsky.social · 30/04/2025

Heat stress events during the summer are not only a reality but also projected to intensify in magnitude and frequency in the future. Would you like to know what are the mechanisms driving them? Dr. Qiyun Ma (@qiyunma.bsky.social) wil uncover them during his oral presentation at #EGU25!

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

We welcome you to Hanna's super cool poster (spoiler) presentation to session CL4.2, on Thursday, 01 May, at 14:00, in hall X5.189.

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

Her work is done in collaboration with Dr. Lu Niu, Dr. Lars Ackermann, Dr. Gerrit Lohmann and Dr. Uta Krebs-Kanzow from PaleoDyn, Dr. Katharina Hochmuth from @utas.edu.au, Dr. Johann Klages from @marumunibremen.bsky.social, and Dr. Nicholas Golledge from @vicuniwgtn.bsky.social.

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

Can you imagine a world without the Antarctic Circumpolar Current? At #EGU25, PhD candidate Hanna Knahl will introduce you the world of the Eocene-Oligocene Transition, around 34 Ma, where the ocean gateways were much different from now! Deep time for real!

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

We invite those attending the #EGU25 to visit the super cool OS4.1 PICO spot 5.8 , on Thursday, 01 May at 10:59!

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

In his #EGU25 PICO Presentation, Alexander will present his study together with Dr. Gerrit Lohmann, in forces the model with perturbations in some parameters using an eddy permitting mesh and unraveling several adjustment mechanisms!

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Paleoclimate Dynamics @paleodyn.bsky.social · 29/04/2025

Climate modelling is a powerful laboratory to understanding climate processes at various scales. However, not all models are able to capture the effects of smaller scale perturbations in the Earth System. Our PhD candidate, Alexander Thorneloe, using FESOM2 did a wonderful job at tacking this issue!

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Paleoclimate Dynamics @paleodyn.bsky.social · 28/04/2025

We invite all of you to watch his presentation in session CR2.2, this Wednesday, 30 April, at 16:50, in room L3. #EGU25 is already happening :D

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Paleoclimate Dynamics @paleodyn.bsky.social · 28/04/2025

In the study together with PaleoDyn members, Dr. Lars Ackermann, Dr. Paul Gierz, Dr. Ahmadreza Massoum and Dr. Gerrit Lohmann, Dr. Rodehacke explains the challenges the authors faced to develop their simulations and present their results, which are super important for future #sealevelrise estimates!

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Paleoclimate Dynamics @paleodyn.bsky.social · 28/04/2025

Ice sheets are a pivotal component of our climate system and subject to instabilities due to current and climate change. Here, at PaleoDyn, Dr. Christian Rodehacke has performed a series of simulations with interactive #GrIS and #AIS and will give an oral presentation on them at #EGU25

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Paleoclimate Dynamics @paleodyn.bsky.social · 25/04/2025

Dr. Ionita will present her poster on Tuesday, on 29 April, from 14:00–15:45, at Hall X3, X3.5. Extreme events are becoming more and more frequent. Understanding them and their consequences is pivotal for our future! We invite you all to learn more from her poster!

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Paleoclimate Dynamics @paleodyn.bsky.social · 25/04/2025

This study is done in collaboration with Dr. @qiyunma.bsky.social and Dr. Viorica Nagavciuc, from Paleodyn, and Dr. Petru Vaideanu, Dr. Bogdan Antonescu, and Dr. Catalin Roibu, from the University of Suceava.

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Paleoclimate Dynamics @paleodyn.bsky.social · 25/04/2025

In their work, Dr. Ionita and co-authors analysed long-term temperature records to detect historical heat waves using statistical analyses. They also performed an attribution analysis to assess the human impact in the frequency and intense of these extreme events.

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Paleoclimate Dynamics @paleodyn.bsky.social · 25/04/2025

Disentangling the anthropogenic impact to climate from its natural variability is not trivial. However, Dr. Monica Ionita (@moniionita.bsky.social) will show at #EGU25 that the extreme summer temperatures observed in 2023 in Eastern Europe were driven by anthropogenic climate change!

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Paleoclimate Dynamics @paleodyn.bsky.social · 22/04/2025

Later on Thursday, 01 May, from 19:00 to 20:00, she will give the short course SC1.9: "Being a scientist in the age of AI: Navigating tools, ethics, and challenges", with Dr. Edoardo Martini. This interesting short course will take place in room -2.62!

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