Johannes Quaas
@jquaas.bsky.social
Theoretical Meteorology, Leipzig University Clouds and climate, biodiversity and climate, aerosols and clouds
New results by Sajedeh Marjani: how do contrails evolve? high-resolution simulations in realistic settings for different weather conditions. They interact with the surroundings, change clouds and humidity. acp.copernicus.org/articles/26/... @meteoleipzig.bsky.social @imperialcollegeldn.bsky.social
New paper alert ‼️ Changes in atmospheric circulation patterns are - to a large part - responsible for the observed summer drought trend in Europe since 1980. The exact cause for these shifts remains uncertain. www.nature.com/articles/s41... Uni press release: www.uni-leipzig.de/en/newsdetai...
Danke für den Tipp, @akleidon.bsky.social , ich hab den Urlaub genutzt um euer Buch zu lesen. Sehr gut lesbar und wirklich Neues für mich drin! Besonders interessant fand ich, dass bei exponentiell wachsendem Energieverbrauch auch Kernenergie keine Lösung sein kann (sondern Photovoltaik)
It gets even better: SpaceX admits ALL 11.500 of its satellites will fail and burn up in the atmosphere within the next 5 years! This global environmental disaster is planned out of pure greed and irresponsibility. Consequences? Zero.
Thomas Hansen@thomashansen.bsky.social · 3w agoStudies show worrying levels of lead, lithium, copper, & aluminum collecting in stratosphere, where the critically important ozone layer exists. These create aerosols that can contaminate the stratosphere, & accelerate ozone layer depletion $TSLAQ Ht: @creddingvye.bsky.social & @jflem2.bsky.social
Only during vacation I take the time reading books and the first I chose to read this year was @drkatemarvel.bsky.social's Human Nature. Despite family duties took only two days, although I needed to ask my wife with vocabulary here and there 😃. I particularly enjoyed her references to history
Review alert: Please consider participating in IPCC-AR7 WGI expert review. Registration will be open until 25 Sep 2026 23:59 (CEST). The First Order Draft will be available for Expert Review between 10 August and 2 October 2026. Register here: apps.ipcc.ch/comments/ar7...
IPCC Review Comments - AR7WG1
apps.ipcc.ch
PhD position in the IDEAS Graduate School ideas.helmholtz.de/apply/: SoilCloudAI: Interpretable and probabilistic AI for land–atmosphere feedbacks during hydroclimatic extremes with Jian Peng, Josefine Umlauft, me (@ufz.de @scadsai.bsky.social @meteoleipzig.bsky.social), Deadline: 26 July 2026
Apply - Helmholtz Information & Data Science Academy
ideas.helmholtz.de
Letter in today's Times by climate scientist Sir Brian Hoskins: "The discourse around net-zero is increasingly decoupled from…science and our changing weather. "Net-zero is not an arbitrary slogan, rather it is dictated by the laws of physics."
Two professorships at @unileipzig.bsky.social Faculty of Physics and Earth System Sciences! Professorship Economic Geography and Sustainability: www.uni-leipzig.de/en/universit... Professorship Social Geography: www.uni-leipzig.de/en/universit... Excellent environment in climate and biodiversity!
#Dragon-6 Insights: #DQ-1 #Aerosol and #Carbon Detection #Lidar (#ACDL).A group of #European & #Chinese scientists met 28-29 April 2026 with representatives of the @esa.int at @tropos-de.bsky.social in #Leipzig: www.tropos.de/en/aktuelles... / @leibniz-gemeinschaft.de #CALIPSO #Aeolus #EarthCARE
🚨Reminder: Apply to the iDiv Fellowship Programme! Spend dedicated time at iDiv to advance your research and collaborate with our biodiversity community. 📅 Deadline: 24 June 2026 🔗 www.idiv.de/research/fel...
Fantastic funding opportunities for biodiversity related research projects👇 1. Synthesis Working Groups 2. Senior Fellows Please spread the words & apply :)
iDiv Biodiversity Research@idiv-research.bsky.social · 3mo ago🚨 Two major iDiv calls are now accepting applications! 🔹 iDiv Synthesis Centre Working Group Call 🔹 iDiv Fellowship Programme Call 🔗 More info, application criteria + deadlines: www.idiv.de
📢 𝗘𝘅𝘁𝗲𝗻𝗱𝗲𝗱 𝗮𝗯𝘀𝘁𝗿𝗮𝗰𝘁 𝘀𝘂𝗯𝗺𝗶𝘀𝘀𝗶𝗼𝗻 𝐮𝐧𝐭𝐢𝐥 𝐓𝐮𝐞𝐬𝐝𝐚𝐲 𝘁𝗼 𝘁𝗵𝗲 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲! 𝗪𝗲 𝗮𝗿𝗲 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿𝘄𝗮𝗿𝗱 𝘁𝗼 𝗴𝗿𝗲𝗮𝘁 𝗰𝗼𝗻𝘁𝗿𝗶𝗯𝘂𝘁𝗶𝗼𝗻𝘀: cbc-conference.org #CBC2026Leipzig #Biodiversity #ClimateScience #BehaviouralScience @unileipzig.bsky.social @ufz.de @idiv-research.bsky.social
If you haven't seen it yet, our international Conference on Connections between Biodiversity, Climate, and Human Behaviour is taking shape: cbc-conference.org Abstract deadline next Friday, 14 April. Great keynote speakers and nice side-events, please check out the programme or get in touch!
Researchers analyzed 40 years of satellite greenness data and tracked the center of mass of global vegetation. They found that the planet’s center of greenness has been shifting northward and eastward and that this movement has accelerated over the past decade. eos.org/articles/ear...
@scadsai.bsky.social is offering a position as a junior research group leader in machine learning at @unileipzig.bsky.social. Submit your research concept by April 15, 2026. 👉 Find out more about the application process: uni-leipzig.b-ite.careers/jobposting/6...
You may have read about the threat against NCAR. Now the American National Science Foundation collects arguments in favour of NCAR. I don't know how valuable for them comments from international folks will be but still I left my comments and maybe you could too? agu.quorum.us/campaign/154...
What does the potentially emerging energy crisis mean for Europe? Yesterday I was in a media briefing with 75 journalists. Here is a snippet of what I told them.
Heute ist #WorldWildlifeDay 🐦 Kollisionen mit Glasstrukturen töten in Deutschland schätzungsweise 18–115 Mio. Vögel pro Jahr. Im Projekt EcoGlassBird @smartenwinter.bsky.social analysieren wir gemeinsam mit der Wildvogelhilfe Leipzig Vogelschlagnachweise in Leipzig. (1/3)
🌎 The 𝗻𝗲𝘅𝘁 𝗸𝗲𝘆𝗻𝗼𝘁𝗲 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 that the 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 will have the honor of presenting is 𝗣𝗿𝗼𝗳. 𝗗𝗿. 𝗞𝗲𝗹𝗹𝘆 𝗙𝗶𝗲𝗹𝗱𝗶𝗻𝗴 (Professor at the School of Communication and Arts, 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆 𝗼𝗳 𝗤𝘂𝗲𝗲𝗻𝘀𝗹𝗮𝗻𝗱, Australia).
The 𝗻𝗲𝘅𝘁 𝗸𝗲𝘆𝗻𝗼𝘁𝗲 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 that the 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 will have the honor of presenting is 𝗣𝗿𝗼𝗳. 𝗗𝗿. 𝗠𝗼𝗿𝗶𝘁𝘇 𝗔. 𝗗𝗿𝘂𝗽𝗽 ( @moritzdrupp.bsky.social, 𝗦𝘂𝘀𝘁𝗮𝗶𝗻𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗘𝗰𝗼𝗻𝗼𝗺𝗶𝗰𝘀, 𝗘𝗧𝗛 𝗭𝘂𝗿𝗶𝗰𝗵 @ethz.ch)
🌍 The 𝗻𝗲𝘅𝘁 𝗸𝗲𝘆𝗻𝗼𝘁𝗲 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 that the 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 will have the honor of presenting is 𝗣𝗿𝗼𝗳. 𝗜𝘀𝗮𝗯𝗲𝗹 𝗠𝗮𝗿𝘁𝗶𝗻𝗲𝘇 𝗖𝗮𝗻𝗼 (𝗦𝗽𝗮𝗻𝗶𝘀𝗵 𝗡𝗮𝘁𝗶𝗼𝗻𝗮𝗹 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗖𝗼𝘂𝗻𝗰𝗶𝗹) – Ecology and Earth Systems Modelling
The wave of green that sweeps Earth from the north in boreal summer to the south in austral summer is shifting due to climate change. Researchers found the centroid of the wave moving northward since 1982 and eastward since 2010. In PNAS: https://ow.ly/PjPU50YmYKz
with the info of cloud condensation nuclei within boundary layer, aerosol forcing uncertainty can reduce by 1/3. Very much looking forward to such products from satellite. Thanks to all collaborators for this exciting work!
Johannes Quaas@jquaas.bsky.social · 5mo agoNew study by @hailingjia.bsky.social, collaboration between @sronspace.bsky.social @meteoleipzig.bsky.social and others: how to obtain best satellite info about cloud condensation nuclei to quantify aerosol-cloud interactions: assimilation for vertical resolution www.science.org/doi/10.1126/...
🌏 The 𝗻𝗲𝘅𝘁 𝗸𝗲𝘆𝗻𝗼𝘁𝗲 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 that the 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 will have the honor of presenting is 𝗣𝗿𝗼𝗳. 𝗗𝗿. 𝗛𝗮𝗻𝘀 𝗩𝗲𝗿𝗯𝗲𝗲𝗰𝗸 (@hans-verbeeck.bsky.social, Faculty of Bioscience Engineering, 𝗗𝗲𝗽𝗮𝗿𝘁𝗺𝗲𝗻𝘁 𝗼𝗳 𝗘𝗻𝘃𝗶𝗿𝗼𝗻𝗺𝗲𝗻𝘁, 𝗚𝗵𝗲𝗻𝘁 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆)
New study by @hailingjia.bsky.social, collaboration between @sronspace.bsky.social @meteoleipzig.bsky.social and others: how to obtain best satellite info about cloud condensation nuclei to quantify aerosol-cloud interactions: assimilation for vertical resolution www.science.org/doi/10.1126/...
🌎 The 𝗻𝗲𝘅𝘁 𝗸𝗲𝘆𝗻𝗼𝘁𝗲 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 that the 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 will have the honor of presenting is 𝗣𝗿𝗼𝗳. 𝗟𝗶𝗲𝘀𝗷𝗲 𝗠𝗼𝗺𝗺𝗲𝗿 (𝗕𝗲𝗹𝗼𝘄𝗴𝗿𝗼𝘂𝗻𝗱 𝗘𝗰𝗼𝗹𝗼𝗴𝘆, 𝗪𝗮𝗴𝗲𝗻𝗶𝗻𝗴𝗲𝗻 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆 @w-u-r.bsky.social)
👇 𝗢𝗣𝗘𝗡 𝗖𝗔𝗟𝗟 𝗙𝗢𝗥 𝗔𝗕𝗦𝗧𝗥𝗔𝗖𝗧𝗦 🌍 𝗖𝗕𝗖 𝗖𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲 𝟮𝟬𝟮𝟲 - 𝗖𝗼𝗻𝗻𝗲𝗰𝘁𝗶𝗻𝗴 𝗕𝗶𝗼𝗱𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆, 𝗖𝗹𝗶𝗺𝗮𝘁𝗲, 𝗮𝗻𝗱 𝗛𝘂𝗺𝗮𝗻 𝗕𝗲𝗵𝗮𝘃𝗶𝗼𝘂𝗿 📆 𝗗𝗲𝗮𝗱𝗹𝗶𝗻𝗲: 𝟭𝟰 𝗔𝗽𝗿𝗶𝗹 🔗 cbc-conference.org Please share this with your colleagues 🙏 @ufz.de @unileipzig.bsky.social
Excited to announce our new publication on #aerosol #cloud #interactions 👇 Proud to lead this perspective with great experts from the field @cleancloud-he.bsky.social @certainty-aci.bsky.social #ESA-AIRSENSE agupubs.onlinelibrary.wiley.com/doi/full/10....
Aerosol‐Cloud Interactions: Overcoming a Barrier to Projecting Near‐Term Climate Evolution and Risk
Aerosol-cloud interactions (ACI) remain a barrier to provide precise and actionable advice to policy makers at global and regional levels We recommend improving satellite retrievals, expanding gr...
agupubs.onlinelibrary.wiley.com
