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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · 19d

The conference was a great mix between theoretical, modelling, and observational approaches in understanding the role of the ocean in the climate system, as we celebrate the MPI-M 50th anniversary! mpimet.mpg.de/en/communica...

CELLO: Climate Exploration in Lively Liaison with the Ocean

From September 16 to 18, 2025, around 220 ocean researchers have met at the CELLO conference organized by the Max Planck Institute for Meteorology. The contributions covered a wide range of spatial sc...

mpimet.mpg.de

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · 19d

I was very happy to attend the Cello conference in Hamburg this week! 🌊

Photo of the Bucerius Law School building

Picture of the keynote presentation by Jochem Marotzke at the CELLO conference

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Reposted by Eduardo Alastrué de Asenjo

CEN University of Hamburg @cenunihh.bsky.social · Jul 15

One day full of scientific discourse and networking: We used our time at the CLICCS Retreat last week to share the latest research and gather our forces for the next funding phase. Also, we honored our new Köppen Award Winner Youssef Ibrahim - congratulations!

A group photo of all participants.
Photo: Laura Berta

Grischa Perino and Leonard Borchert giving a talk on their project.

Youssef Ibrahim is honored with the Köppen Award.

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Reposted by Eduardo Alastrué de Asenjo

Andrew King (he/him) @andrewkingclimate.bsky.social · Jul 7

In our new paper we discuss how communication of post-net zero climate changes needs to improve and go much further than global average temperature @chrisd-jones.bsky.social @sarahinscience.bsky.social @21stcenturyweather.bsky.social www.nature.com/articles/s43...

Enhancing communication of climate changes under net zero emissions - Communications Earth & Environment

Much of the public discourse around climate changes under net zero carbon dioxide emissions has been focused on global mean temperature changes after emissions cessation. More attention needs to be pa...

www.nature.com

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Reposted by Eduardo Alastrué de Asenjo

Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

New paper alert! 🚨🧪🌊

Do you wonder how Southern Ocean sea ice changes decades after the AMOC substantially weakens? 🧊

Check out our new @jgroceans.bsky.social paper, amazingly led by Rachel Diamond from the @bas.ac.uk

doi.org/10.1029/2024...

Here is a quick summary 🧵 (1/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

Overall, while the multidecadal changes found here would be smaller than the direct effects from global warming, our study highlights how many of these changes are significant and consistent among different models, while emphasising the global reach of AMOC impacts 💡

(5/5)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

We find, as expected, that a weaker AMOC leads to a buildup of heat in the Southern Ocean, warmer temperatures and sea-ice loss 🌡️

More surprisingly, we identify a new tropical-Antarctic atmospheric teleconnection, which explains why there is cooling and sea-ice growth in the Weddell Sea 🏝️🧊

(4/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

We use the simulations we previously introduced in the NAHosMIP, a multi-model intercomparison of freshwater hosing experiments 🚿 This hosing induces an idealised AMOC weakening so that we can calibrate and separate AMOC impacts

doi.org/10.5194/gmd-...

(3/n)

Understanding AMOC stability: the North Atlantic Hosing Model Intercomparison Project

Abstract. The Atlantic meridional overturning circulation (AMOC) is an important part of our climate system. The AMOC is predicted to weaken under climate change; however, theories suggest that it may...

doi.org

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

While several studies have investigated the Southern Ocean response to AMOC changes, the multidecadal Antarctic sea-ice response is still unknown ❓

We investigate Southern Ocean sea ice & temperature changes, along with changes in many drivers, such as heat transport or circulation changes 🔎

(2/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jul 3

New paper alert! 🚨🧪🌊

Do you wonder how Southern Ocean sea ice changes decades after the AMOC substantially weakens? 🧊

Check out our new @jgroceans.bsky.social paper, amazingly led by Rachel Diamond from the @bas.ac.uk

doi.org/10.1029/2024...

Here is a quick summary 🧵 (1/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 6

📝 Check out this Kudos summary of our recent ERL study on European heat extremes in long-term net-zero emissions futures! 🧪

link.growkudos.com/1pm179ta9kw

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Reposted by Eduardo Alastrué de Asenjo

CEN University of Hamburg @cenunihh.bsky.social · Jun 4

🌡️ Europe’s #heat extremes won’t stop, even at net-zero. Each year of delay locks in hotter and more frequent extremes for centuries. Mediterranean heatwaves could even be 30x more likely if the Paris Agreement is reached ten years late. 🧪 iopscience.iop.org/article/10.1... @edualastrue.bsky.social‬

A photo of the lead researcher Eduardo Alastrué de Asenjo and a quote: “The bad news: Even if we were to stop emitting greenhouse gases immediately, extreme heat in Europe would continue to occur. The good news: The sooner we achieve net-zero emissions, the sooner we can prevent extremes from getting even hotter for centuries to come. Every year counts.”

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 5

Fantastic colloquium today by @eleanorfrajka.bsky.social on the state of knowledge of AMOC observations 🌊 It’s incredible & fascinating how far the field got in the last 20 years 💡 But also, how much there is left to understand & the need for more collaborative AMOC community 🤝

Picture of Colloquium “Changing currents, two decades of observing the AMOC”

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Reposted by Eduardo Alastrué de Asenjo

Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

🚨 New paper alert! 🧪

🔥 How would heat extremes in Europe evolve under long-term net-zero emissions?

Find out in our ERL article, co-written with @andrewkingclimate.bsky.social and Tilo Tiehn

iopscience.iop.org/article/10.1...

Here’s a quick summary (1/n) 🧵

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

🗞️ Read here the press release by CLICCS/@cenunihh.bsky.social: www.cliccs.uni-hamburg.de/about-cliccs... (6/6)

Extreme heat in Europe: every year counts

www.cliccs.uni-hamburg.de

Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

💭 Implications

This first assessment of European heat extremes in long-term net-zero futures highlights the need to reduce emissions promptly, as well as better understand the underlying mechanisms and the policy consequences of long-term net-zero changes ⌛️ (5/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

💡 Key takeaways:

- Even under net zero, Europe might face intensified heat extremes for centuries 🌡️
- Short delays in emissions cessation would result in even more intense extremes 📈
- The path to reach a global temperature target matters for the extreme heat distribution 🥵

(4/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

📊 How do we address this gap?

We use idealised 1000-year net-zero emissions Earth system model simulations, to capture the long-term evolution across European regions 💻 With different simulations with increasingly delayed emissions cessation, we can study the effect of postponed mitigation 🏭 (3/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

Research question❓: European heat extremes have disproportionally increased in recent decades, but their future evolution, particularly on long timescales, is yet unknown 🌍

(2/n)

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Jun 4

🚨 New paper alert! 🧪

🔥 How would heat extremes in Europe evolve under long-term net-zero emissions?

Find out in our ERL article, co-written with @andrewkingclimate.bsky.social and Tilo Tiehn

iopscience.iop.org/article/10.1...

Here’s a quick summary (1/n) 🧵

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · May 27

Hi Manu! Could you add me to the feed? 🙂 Here is my Scholar page scholar.google.de/citations?us...

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Reposted by Eduardo Alastrué de Asenjo

CEN University of Hamburg @cenunihh.bsky.social · May 22

🌍✨ Yippee! CLICCS will receive funding for another seven years as a Cluster of Excellence @uni-hamburg.de‬ ! Over 200 international researchers are exploring which climate futures are plausible—and how we can work towards achieving the desired ones.
www.cliccs.uni-hamburg.de/about-cliccs...

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Apr 28

Are you at #EGU25 and are interested in European heat extremes in Europe? 🌡️Perhaps in net-zero futures? 🏭 Or in climate stabilisation? 📉
Come to my talk tomorrow during the first morning session, at 9:45 in room 0.31/32!

meetingorganizer.copernicus.org/EGU25/EGU25-...

Abstract EGU25-10033

meetingorganizer.copernicus.org

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Reposted by Eduardo Alastrué de Asenjo

Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Apr 25

What better way to prepare for #EGU25 than to calculate the mean temperature in Vienna during the conference for each year since the @egu.eu was established 🤓📈 Considering the current weather forecast for next week, this edition we might have a record year 🌡️

Time series of daily mean temperatures averaged for each EGU General Assembly (2005-2024). Data: ERA5

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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · Apr 26

Despite staying below 2024-levels for most of April, daily global temperatures reach a new record for this time of the year 📈🌡️

Daily global surface temperatures, with a daily record on the 24th of April, 2025. Credit: C3S/ECMWF

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