Johannes Quaas
@jquaas
Theoretical Meteorology, Leipzig University Clouds and climate, biodiversity and climate, aerosols and clouds
Gestern in Kalbe in einer Kartoffellagerhalle: Vortrag und viel Diskussion zum Klimawandel, u.a. mit Landwirten zu Hitze und Dürre. Teil der Roadshow der Initiative Wissenschaft für Demokratie. wissenschaftfuerdemokratie.de/aktuelles/wfd-roadshow-was-stimmt-hier-eigentlich/ kuenstlerstadt-kalbe.de
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
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)
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
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!
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!
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...
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 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
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.
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
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.
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/...
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!
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!
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...
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
Congratulations and kudos to the citizens of Paris for once again leading in improving quality of life, safety, air quality, creating niches for #biodiversity and adapting to #climatechange! There is a street near where we have the privilege to live for a few months. A role model for other cities!
Webinar series following the Evidence review report on Solar radiation modification for the European Commission, open to everyone: 23 Jan, 15 CET. scientificadvice.eu/events/solar... 3 Feb, 15 CET. scientificadvice.eu/events/solar... 11 Mar, 14 CET. scientificadvice.eu/events/solar...
Satellite measurements are very useful tools to learn about how clouds act in climate change. The interpretation requires inverse radiative transfer calculations. PhD researcher Jessenia Gonzalez now used machine learning to make this much faster. Excellent collaboration with @isp-uv-es.bsky.social
As the debate around solar radiation modification (SRM; aka geoengineering) intensifies, the European Commission asked about an evidence review report. Bottom line: SRM is no meaningful option to combat climate change. The debate helps to sharpen arguments. scientificadvice.eu/advice/solar...
Climate change and biodiversity loss are connected! This week we presented our ideas for a collaborative project to our national funding agency. Fingers crossed, we will know the outcome in May
When we emit gases or particles to the atmosphere, at short timescale it adjusts, for example the clouds. This may amplify or dampen the the Earth energy balance. New overview paper now out in AGU Advances from our CONSTRAIN EU project