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Johannes Quaas @jquaas.bsky.social · 9d

Wow, this looks beautiful

Reposted by Johannes Quaas

Zeke Hausfather @hausfath.bsky.social · 10d

Last week the German Meteorological Society warned that "the 3-degree limit could be exceeded as early as 2050".

While not possible to fully rule out, the assessed warming scenarios we published in the IPCC AR6 report find this to be extremely unlikely.

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Johannes Quaas @jquaas.bsky.social · 11d

That's really great, congratulations! And I'm happy my colleague Made Maahn @meteoleipzig.bsky.social helps make it happen!

Robin Hogan @robinjhogan.bsky.social · 12d

It's official: WIVERN will be ESA's 11th Earth Explorer satellite, measuring winds deep inside hurricanes, fronts and other weather systems!
www.esa.int/Applications...

ESA selects WIVERN as 11th Earth Explorer mission

After meticulous preparation and rigorous evaluation, ESA’s Member States have selected WIVERN to become the 11th Earth Explorer mission to be implemented through the agency’s prestigious FutureEO pro...

www.esa.int

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Johannes Quaas @jquaas.bsky.social · 12d

The national project "WarmWorld" works on the new-generation global climate simulations at resolutions as high as 1 km. At @kit.edu a group of us met to discuss how to represent the cloud processes in clouds in such computationally-demanding models, to account for pollution effects on climate.

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Johannes Quaas @jquaas.bsky.social · 14d

Currently at the annual meeting of the "Arctic amplification" collaborative research project. Discussion on how increases in convection in the Arctic make it more "tropical" with warming. ac3-tr.de funded by @dfg.de, partners @meteoleipzig.bsky.social, U Bremen, Köln, @awi.de, @tropos-de.bsky.social

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Reposted by Johannes Quaas

Zeke Hausfather @hausfath.bsky.social · 15d

In a UN speech today, President Trump said that "all of these [climate] predictions were wrong".

Back in 2019 I led a research effort to digitize old climate model projections and assess how well they did. Turns out they got future warming pretty spot on!

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Johannes Quaas @jquaas.bsky.social · 26d

amazing progress in just one year on understanding air pollution in cities, multifunctionality of ecosystems, aerosols as climate drivers, or the role of heat waves. Excellent keynote by Agnes Tomini from the Aix-Marseille school of economics
eco-n.org @unileipzig.bsky.social, funding by @dfg.de

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Johannes Quaas @jquaas.bsky.social · 26d

Since one year, the Research Training Group "Economics of connected natural commons" studies the challenges of sustainably using ecosystems and the climate system as commons. We just come back from the first retreat between the 14 PhD candidates, advisers, and excellent invited external speakers.

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Johannes Quaas @jquaas.bsky.social · Sep 4

By the way, Timo presented their nice paper demonstrating that climate attribution has the potential to change people's attitudes, and that people are even willing to pay for it: www.journals.uchicago.edu/doi/10.1086/...

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Johannes Quaas @jquaas.bsky.social · Sep 4

Hosted by @meteoleipzig.bsky.social @unileipzig.bsky.social @tropos-de.bsky.social , ECO-N research training group funded by @dfg.de
Great lectures by @sebastian-sippel.bsky.social @frediotto.bsky.social @mdebrito.bsky.social @zscheischlerjak.bsky.social and more!

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Johannes Quaas @jquaas.bsky.social · Sep 4

The current Advanced Training Module on "Climate Attribution", joinly by our interdisciplinary research training group "Economics of Connected Natural Commons" and the Leipzig Graduate school on Clouds, aerosols and radiation sparked large interest: 65 PhD researchers from 7 countries!

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Johannes Quaas @jquaas.bsky.social · Sep 4

Great piece from Nadir Jeevanjee. As a meteorologist I of course love it when forecasts prove correct but as a citizen I would have preferred it if climate change had been prevented on the basis of the forecasts

Andrew Dessler @andrewdessler.com · Sep 4

nice article from Nadir Jeevanjee (is he on bluesky?) about predictions climate models got right. successful predictions are the gold standard of science.

5 forecasts early climate models got right – the evidence is all around you
theconversation.com/5-forecasts-...

5 forecasts early climate models got right – the evidence is all around you

From rising global temperatures to the fast-warming Arctic, early climate models predicted the changes half a century ago.

theconversation.com

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Johannes Quaas @jquaas.bsky.social · Aug 31

What a hubris. Leading back to the time before division of labor. The point is of course indeed, we all have to stop believing those in power

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Johannes Quaas @jquaas.bsky.social · Aug 28

Fantastic collaboration within EU-funded Marie Curie Innovative Training Network "imiracli" especially with @isp-uv-es.bsky.social !

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Johannes Quaas @jquaas.bsky.social · Aug 28

Cloud drop number is a key quantity to understand cloud processes. Getting it from satellites so far was very indirect. Gonzalez et al. @meteoleipzig.bsky.social @scadsai.bsky.social now created a machine-learning method to get it directly from satellite radiances ieeexplore.ieee.org/document/111...

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Johannes Quaas @jquaas.bsky.social · Aug 18

I'm glad to contribute again!

IPCC @ipcc.bsky.social · Aug 18

The #IPCC has announced the authors selected for its Seventh Assessment Report.

664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.

🌍 51% from developing countries
🚺 46% women

🔗 bit.ly/AR7AuthorsPR

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Reposted by Johannes Quaas

Helge Thomas 🌻 @helgethomas.bsky.social · Aug 11

Imagine all cars were electric, and then one Volkswagen engineer comes up with another idea …

#EMobility

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Reposted by Johannes Quaas

Ana Bastos @anabastos.bsky.social · Aug 16

www.mdr.de/mdr-aktuell-...

Studie: Wälder in EU-Ländern nehmen weniger CO2-Emissionen auf | MDR.DE

Im Gespräch: Ana Bastos, Studienautorin und Geophysikerin der Uni Leipzig

www.mdr.de

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Johannes Quaas @jquaas.bsky.social · Aug 4

How does cloud drop size distribution respond to aerosol? Hengqi Wang, visiting PhD researcher from Tsinghua university, used new data from satellite measurements of polarization from SRON/Netherlands to quantify the effect. Offsets systematically 7% of the aerosol-cloud forcing. rdcu.be/ezaeX

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Johannes Quaas @jquaas.bsky.social · Aug 3

I fully agree. Science is not a World Cup with countries competing, but a collaborative effort. We abroad really need the American technology and ideas, and the stimulating exchange.

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Reposted by Johannes Quaas

David Ho @davidho.bsky.social · Jul 16

As @pkrugman.bsky.social writes, this is a deliberate effort to destroy science.

For MAGA, Ignorance is Strength

Research cuts aren’t about shrinking government, they’re about killing science

paulkrugman.substack.com

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Johannes Quaas @jquaas.bsky.social · Jul 1

Hopefully congresspeople understand this to the full extent. One cannot worsen climate change by subsidizing fossils and at the same time cut down climate research and so not work on understanding what is coming and on preparing adaptation. At least funding for NOAA climate research should increase.

Johannes Quaas @jquaas.bsky.social · Jul 1

Haha who's performance? Certainly not the NOAA colleague's

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Johannes Quaas @jquaas.bsky.social · Jun 30

This would be disastrous. I sincerely hope for reasonable lawmakers

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Johannes Quaas @jquaas.bsky.social · Jun 27

That would be some relief. What would be our field without GFDL?

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