Johannes Quaas
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jquaas.bsky.social
Johannes Quaas
@jquaas.bsky.social
1.6K followers 270 following 82 posts

Theoretical Meteorology, Leipzig University
Clouds and climate, biodiversity and climate, aerosols and clouds

Videos
Environmental science 52%
Geology 19%
Posts Replies Media Videos

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 4d
Reminder: today is the deadline to apply for the 14 PhD positions in our Research Training Group "Economics of connected natural commons: Atmosphere and Biodiversity" www.uni-leipzig.de/en/economics... www.eco-n.org
Universität Leipzig: Apply for one of the 14 Open Doctoral Researcher Positions
In September 2026, the 2nd cohort of ECO-N doctoral researchers will start and we seek to fill 14 open positions. The application phase will be open until 30 January 2026.
www.uni-leipzig.de

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 10d
Please let us also know in case European colleagues can do meaningful things to support!

Reposted by Johannes Quaas

wrickels.bsky.social
Wilfried Rickels @wrickels.bsky.social · 12d
Very embarrising day for EU. It is incomprehensible how parliamentarians, precisely on the days when Trump is reaching out to Greenland, fail to understand what is at stake.
patcohen.bsky.social Patricia Cohen @patcohen.bsky.social · 13d
When it comes to the economy, are the Europeans sometimes their own worst enemy? The newly signed trade pact between the EU and South American is derailed. www.nytimes.com/2026/01/21/u...
As Europe Tries to Diversify Trade, a Major Deal With South America Stumbles
www.nytimes.com

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 13d
congratulations!

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 14d
The Director of the German Climate Computing Centre (www.dkrz.de) is a joint appointment with University of Hamburg and leads the central facility for climate computing, being enlarged to also be a central climate data facility. A crucial thing for German climate science. Closing date: 17 Feb 2026
DKRZ - Partner der Klimaforschung
www.dkrz.de

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 14d
The director of @tropos-de.bsky.social is advertised as joint appointment as a full professor for Atmospheric Physics @meteoleipzig.bsky.social @unileipzig.bsky.social TROPOS is one of the large research centres in atmospheric sciences in Germany. Closing date: 31 March 2026

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · 14d
Currently 2 important positions in German climate/atmospheric science are advertised: Director of the Leibniz-Institute for Tropospheric Research (www.uni-leipzig.de/en/universit...) and Director of the German Climate Computing Centre (DKRZ, www.uni-hamburg.de/en/stellenan...)
Home - Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
Das Leibniz-Institut für Troposphärenforschung besitzt ein klares und weltweit einzigartiges Forschungsprofil, in dessen Mittelpunkt Aerosole, also kleinste luftgetragene Partikel, und Wolken stehen.
www.tropos.de

Reposted by Johannes Quaas, Peter Thorne

gavreilly.com
Gavan Reilly @gavreilly.com · 15d
Loooooong applause - and then a standing ovation - at the European Parliament this evening, as President president @president.europarl.europa.eu says Europe is resolute in defending the status and sovereignty of Denmark and Greenland

Reposted by Johannes Quaas

carbonbrief.org
Carbon Brief @carbonbrief.org · 17d
Recommended read: A commentary co-authored by climate scientist Prof @clequere.bsky.social in Nature argued that several climate trends have locked in “irreversible progress in climate action”.
Irreversibility in climate action - Nature Climate Change
Although climate action is undermined by political interests and institutional inertia, multiple safeguards are in place to prevent backsliding on progress so far, and positive feedbacks reinforce…
buff.ly

Reposted by Johannes Quaas

iwh-halle.bsky.social
IWH_Halle @iwh-halle.bsky.social · 26d
IWH Research Seminar in #Economics with Gauthier Vermandel (@vermandel.bsky.social, Ecole Polytechnique)

📢 The New Keynesian #Climate Model

📅 Tuesday, January 13, 2:15 pm CET
▶️ Join us via Zoom! Please register here to get your link: www.iwh-halle.de/en/about-the...

#climatechange #climatepolicy

Reposted by Johannes Quaas, A. E. Dessler, Gavin A. Schmidt , and 2 more

hausfath.bsky.social
Zeke Hausfather @hausfath.bsky.social · Jan 2
Humans have emitted 2750 gigatons of CO2 since the industrial revolution from burning fossil fuels and land use change. To put this in perspective, this is more than the (dry) mass of all living things on earth and everything humans have ever built combined:

Reposted by Johannes Quaas

antjeweisheimer.bsky.social
Antje Weisheimer @antjeweisheimer.bsky.social · Dec 18
📢 Postdoc Opportunity to study large-scale dynamic and thermodynamic conditions influencing the risk of cyclones of tropical origin 🌀 reaching Western Europe
📍 Joint post: Universities of Oxford & Edinburgh
⏰ Apply by 15 Jan 2026 (noon GMT)

Details & apply 👉 my.corehr.com/pls/uoxrecru...
Job Details
my.corehr.com

Reposted by Peter Thorne, Adam H. Sobel

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Dec 18
Attacking NCAR is enormously self-destructive for America. NCAR is the leading centre in weather and climate research in the world. We Europeans often travel to NCAR to collaborate, discuss and learn. Hurting the centre will cause damage that is irreversible for years to decades with global impact.
eos.org Eos @eos.org · Dec 18
To help #SaveNCAR, read our update below and visit this @aguscipolicy.bsky.social page, where you can find email text and a call script to share with your representatives. agu.quorum.us/campaign/151...

Reposted by Sonia I. Seneviratne, Johannes Quaas, Peter Thorne , and 1 more

eos.org
Eos @eos.org · Dec 18
To help #SaveNCAR, read our update below and visit this @aguscipolicy.bsky.social page, where you can find email text and a call script to share with your representatives. agu.quorum.us/campaign/151...

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Dec 11
@meteoleipzig.bsky.social @tropos-de.bsky.social @ufz.de @idiv-research.bsky.social

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Dec 11
A total of more than 30 early-career researchers and established researchers from economics, meteorology, and biology collaborate within ECO-N.

We seek to fill 14 funded doctoral researcher positions for the period September 2026 to August 2029, with envisaged extension to 2030.

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Dec 11
ECO-N combines interdisciplinary research on how to sustainably use and conserve natural commons such as biodiverse forests, fertile soils, regional climate, or clean urban air, with a rigorous course programme providing disciplinary and interdisciplinary competencies.

Reposted by Paul Lehmann, Georg Weizsäcker

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Dec 11
The DFG research training group on the Economics of Connected Natural Commons: Atmosphere and Biodiversity (ECO-N) at Leipzig University is happy to announce vacancies for another 14 doctoral researcher positions. www.eco-n.org
uni-leipzig.b-ite.careers/jobposting/9...
@unileipzig.bsky.social

Reposted by Johannes Quaas

meteoleipzig.bsky.social
Leipzig Institute for Meteorology @meteoleipzig.bsky.social · Nov 25
New paper alert: b.tellusjournals.se/articles/10....

Aerosols have an actual warming effect in the Arctic in winter: Changed dynamics via shift in the jet stream position (which in turn projects on the Arctic Oscillation index —> more positive)

@jquaas.bsky.social @khaustein.bsky.social
Exploring the Sensitivity of Arctic Winter Climate to Aerosol Loading as Simulated in CMIP6 | Tellus B: Chemical and Physical Meteorology
b.tellusjournals.se

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Nov 15
Fascinating image!

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Nov 14
Great study by our iDiv colleagues: biodiversity in forests helps to mitigate impacts of climate change
idiv-research.bsky.social iDiv Biodiversity Research @idiv-research.bsky.social · Nov 13
New study led by @lsachsenmaier.bsky.social @agwirthweigelt.bsky.social shows: forest stands made up of tree species with different water-use strategies (not just many species) grow better in drought years. #iDivResearch #Biodiversity
www.idiv.de/diverse-fore...
Diverse forests are more resistant to climate change
www.idiv.de

Reposted by Johannes Quaas, John Parker, Karl Andraczek , and 1 more

idiv-research.bsky.social
iDiv Biodiversity Research @idiv-research.bsky.social · Nov 13
New study led by @lsachsenmaier.bsky.social @agwirthweigelt.bsky.social shows: forest stands made up of tree species with different water-use strategies (not just many species) grow better in drought years. #iDivResearch #Biodiversity
www.idiv.de/diverse-fore...
Diverse forests are more resistant to climate change
www.idiv.de

Reposted by Johannes Quaas

janrosenow.bsky.social
Jan Rosenow @janrosenow.bsky.social · Nov 11
What if we had no electricity and everything ran on fossil fuels?

This ad keeps making me chuckle.

Enjoy if you have not seen it or rewatch as it is just gold.

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Nov 10
Dokumentation über Klima und Amazonas mit der super Kollegin Mira Pöhlker @tropos-de.bsky.social @meteoleipzig.bsky.social

Reposted by Johannes Quaas

tropos-de.bsky.social
tropos-de.bsky.social @tropos-de.bsky.social · Nov 10
Nicht verpassen! Heute 19:25 im #ZDF & online:
#Expedition #Amazonas mit #ATTO & der #Leipzig-er #Wolken-Forscherin Mira Pöhlker (#TROPOS) > www.zdf.de/video/dokus/...

#COP30 #Brazil @zdfde.bsky.social #Klimawandel #ATTOproject @mpic.de #MPI_BGC @leibniz-gemeinschaft.de @unileipzig.bsky.social

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Nov 10
A joint job offer is open for Junior Professorship Financial Economics
@unileipzig.bsky.social together with the excellent @iwh-halle.bsky.social
Really interesting focus on sustainability, links to biodiversity and climate:
www.uni-leipzig.de/en/universit...
Junior Professorship in VWL, esp. Financial Economics (W1)
www.uni-leipzig.de

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Oct 27
I think it should be important to consider clouds. There are more clouds over forests, and that compensates on average some 40% of the albedo effect, Luo et al. Nat Comms 2024 (www.nature.com/articles/s41...)
Decreased cloud cover partially offsets the cooling effects of surface albedo change due to deforestation - Nature Communications
This study shows that deforestation locally reduces global low-level and tropical high-level clouds, with the resulting warming partially counteracting the cooling of increased surface albedo.
www.nature.com

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Oct 23
Hey Gunnar, how many more high impact papers this year? Amazing!

Reposted by Christian Odendahl, Johannes Quaas

janrosenow.bsky.social
Jan Rosenow @janrosenow.bsky.social · Oct 20
It was a call I couldn't ignore.

I was formally invited by the Danish EU Presidency to Luxembourg to speak about industrial electrification and energy efficiency directly to the energy ministers from every single one of the 27 EU member states on the 20th of October.
www.youtube.com/watch?v=FO30...
Speaking at EU Energy Council
YouTube video by Jan Rosenow
www.youtube.com

jquaas.bsky.social
Johannes Quaas @jquaas.bsky.social · Sep 29
Wow, this looks beautiful