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Sebastian Sippel

@sebastian-sippel.bsky.social
433 followers 202 following 7 posts

Junior Professor for Climate Attribution at @meteoleipzig.bsky.social

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Reposted by Sebastian Sippel
Robert Fietzke @robertfietzke.bsky.social · 12/09/2026
Das Wahlergebnis hat Rechtsextreme und rechte Täter beflügelt. In #Weißenfels wollte ein betrunkener Autofahrer migrantische Jugendliche überfahren. Dort hat die AfD 52,4% geholt.
mz.de
Schockierender Angriff in Weißenfels: Betrunkener Rassist will Jugendliche mit Auto überfahren
Schockierender Vorfall in Weißenfels: Ein betrunkener Autofahrer soll absichtlich auf migrantische Jugendliche zugefahren sein. Die Polizei ermittelt. Was bisher bekannt ist.
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Christoph Bautz @christophbautz.bsky.social · 09/09/2026
"Da unterbrach ihn ein AfD-Mann. Er rief: »Wir müssen nur einmal gewinnen! Sie müssen immer gewinnen!« Wir müssen nur einmal gewinnen. Man muss sich diesen Satz auf der Zunge zergehen lassen. Wir müssen nur einmal gewinnen – dann werdet ihr uns nicht mehr los. Der Ernstfall ist jetzt." #AfDVerbot
zeit.de
Kommentar zum AfD-Sieg: Der Ernstfall ist jetzt
Zum ersten Mal in der Geschichte der Bundesrepublik greift die radikale Rechte nach der Macht. Und im Moment ihres größten Erfolgs lässt sie die Maske fallen.
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Oliver Scheiber 🇪🇺 @oliverscheiber.eu · 06/09/2026
Es ist der Abbau des Sozialstaats, der direkt in den Faschismus führt. Der Sozialstaat ist finanzierbar, das Gerede von der Unfinanzierbarkeit und vom Sparzwang dient dazu, die Tech-Milliardäre und das reichste Prozent zu schützen. Solidarität und Gemeinwohl müssen ins Zentrum der Politik rücken.
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Gilda Sahebi @gildasahebi.bsky.social · 06/09/2026
Wenn man einen Moment innehält, denkt man, wie gleich doch immer die Muster und Abläufe sind, die autoritäre und menschenverachtende Kräfte an die Macht bringen. Und wie gleich die Muster und Abläufe sind, wie demokratische Kräfte versagen. Als sei die Menschheit nicht in der Lage, zu lernen.
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Daniel Mullis @daenumullis.bsky.social · 06/09/2026
45 % für eine rechtsextreme Partei sind nichts weniger als eine geschichtspolitische Bankrotterklärung für ein Land, das so sehr vor sich hergetragen hat, seine Geschichte gut aufgearbeitet zu haben. Niederschmetternd.
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Cihan Çelik @cihancelik.bsky.social · 06/09/2026
Man kann davon ausgehen, dass viele Menschen heute Abend in Sachsen-Anhalt Pläne machen, wie sie das Land verlassen können, weil sie nicht in das Gesellschaftsbild völkischer Rechtsextremisten passen. Darunter sicher auch unverzichtbare Fachkräfte. Ich könnte sie gut verstehen.
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Peter Pfleiderer @klimapeter.bsky.social · 24/08/2026
Kleiner Bericht über unsere Studie. Ich weiß nicht ganz, was mit der Überschrift gemeint ist, oder wie sie zu verstehen ist. Immerhin waren es ja "Forschende", die diesen Denkanstoß gegeben haben ... 🤔 www.tagesschau.de/wissen/klima...
tagesschau.de
Jahrhundertsommer? Warum Forschende neu denken müssen
Ein überaus heißer und trockener Sommer wie in diesem Jahr kann künftig normal sein. Das zumindest sagt die Klimaforschung. Die Frage ist nur: Wie sieht dann künftig ein Jahrhundertsommer aus? Von Flo...
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Gergana Gyuleva @ggyuleva.bsky.social · 20/08/2026
Radiation Trends Point to Higher Future Warming ‼️ 🌡️ How sensitive is Earth's climate to increasing CO₂ concentrations? Fresh insights in our new study: agupubs.onlinelibrary.wiley.com/doi/10.1029/... @retoknutti.bsky.social @erichfischer.bsky.social @sebastian-sippel.bsky.social
agupubs.onlinelibrary.wiley.com
Recent Temperature and Energy Imbalance Trends Point to Higher Estimates of Future Warming
Recent surface warming and top-of-atmosphere energy imbalance point to higher future warming than previously estimated Previous constraints on transient climate response using observed surface te...
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Peter Pfleiderer @klimapeter.bsky.social · 17/08/2026
What is changing with extreme European summers? 🥵 We look at many simulated 100-year summers in western Europe to find out how current day extreme summers differ from similarly rare pre-industrial summers. @robinnoyelle.bsky.social and @sebastian-sippel.bsky.social doi.org/10.1029/2026...
doi.org
Heat Extremes Within Hot Summer Seasons Intensify More Than in Average Summers Under Global Warming
Rare heat summers today (with ≈ 100-year return period) show a different evolution of sub-seasonal temperatures than similarly rare summers in pre-industrial climate. Faster drying of soils in cu...
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Erich Fischer @erichfischer.bsky.social · 13/08/2026
Radiation Trends Point to Higher Future Warming How sensitive is the climate to increasing CO₂ concentrations? Our new paper led by @ggyuleva.bsky.social with @retoknutti.bsky.social and @sebastian-sippel.bsky.social adds a new piece to the puzzle agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Recent Temperature and Energy Imbalance Trends Point to Higher Estimates of Future Warming
Recent surface warming and top-of-atmosphere energy imbalance point to higher future warming than previously estimated Previous constraints on transient climate response using observed surface te...
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Leipzig Institute for Meteorology @meteoleipzig.bsky.social · 22/07/2026
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...
three panels with yellow and blue colours for soil moisture trends. mostly yellow for the total change in the top panel. light yellow changes in the bottom left panel for thermodynamics. some blue in the north and south but yellow in western and central parts in the bottom right panel for dynamics.
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Ana Bastos @anabastos.bsky.social · 22/07/2026
Drought has increased in Europe since 1980s: climate change or natural climate variability? 🌍🌡️🌬️ István Dunkl shows that hifts in large-scale atmospheric circulation explain ca. 55% of the soil moisture decline and amplify drying induced by thermodynamic changes 👇 w/ @sebastian-sippel.bsky.social
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Nature Geoscience @natgeosci.nature.com · 22/07/2026
⚒️ Article: Shifting atmospheric circulation patterns over Europe since the 1980s have been the major cause of increasingly severe droughts @sebastian-sippel.bsky.social @anabastos.bsky.social @meteoleipzig.bsky.social www.nature.com/articles/s41...
nature.com
European summer drying largely driven by atmospheric circulation changes since the 1980s - Nature Geoscience
Shifting atmospheric circulation patterns over Europe since the 1980s have been the major cause of increasingly severe droughts on the continent, according to nudged circulation climate model simulati...
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Prof Friederike Otto @frediotto.bsky.social · 26/06/2026
Europe's worst heatwave so far, in terms of heat stress measures and temperatures - brought to you by fossil fuels. New @wwattribution.bsky.social study showing how such deadly heat became possible in only a few decades. www.worldweatherattribution.org/fossil-fuel-...
A map of Europes with dots for all 854 cities analysed, pink dots for the cities that broke humid heat records, grey dots elsewhere. Pink dots conentrated over Southern UK, Germany, Poland and Benelux.
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Erich Fischer @erichfischer.bsky.social · 29/04/2026
Uncertain dynamic response of mid-latitude winter precipitation New @nature.com paper led by Lei Gu with Dominik Schumacher, @sebastian-sippel.bsky.social, Istvan Dunkl, @robinnoyelle.bsky.social, Jitendra Singh, Lorenzo Pierini, @retoknutti.bsky.social and @erichfischer.bsky.social @ethz.ch
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Miguel D. Mahecha @miguelmahecha.bsky.social · 23/02/2026
Very happy to finally share a paper that has been in my mind for a long time 🌍 🔗 www.pnas.org/doi/10.1073/...
pnas.org
Accelerated north–east shift of the global green wave trajectory | PNAS
Viewed from space, a “green wave” seasonally traverses Earth’s surface, from the north in boreal summer to the south in austral summer. This wave r...
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Proceedings of the National Academy of Sciences @pnas.org · 27/02/2026
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: ow.ly/PjPU50YmYKz
Global greenness in September. Shown is a globe depicting average global terrestrial greenness in September, visualized as “height over ground” and averaged over the period 2000–2023. Greenness is derived from satellite remote-sensing observations provided by NASA’s Moderate Resolution Imaging Spectroradiometer and illustrates the large-scale spatial distribution of vegetation activity across the terrestrial biosphere.
CREDIT: Ida Flik
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Ana Bastos @anabastos.bsky.social · 27/01/2026
How long does it take for the anthropogenic effects on the land C sink to be detected, given the large year to year variability? And can we shorten the time of emergence in observations by removing the circulation-induced components? Find more in Na Li’s study bg.copernicus.org/articles/23/...
bg.copernicus.org
Quantifying the time of emergence of the anthropogenic signal in the global land carbon sink
Abstract. The global land carbon sink has increased since the pre-industrial period, driven by the increasing atmospheric CO2 concentration and physical processes influenced by climate change. However...
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Peter Pfleiderer @klimapeter.bsky.social · 15/01/2026
Summer temperatures have strongly been influenced by circulation changes in the northern mid-latitudes. In our new study we evaluate and compare 4 statistical and ML methods that decompose trends into a "thermodynamical" and a "circulation induced" part. wcd.copernicus.org/articles/7/8...
wcd.copernicus.org
Considerable yet contrasting regional imprint of circulation change on summer temperature trends across the Northern hemisphere mid-latitudes
Abstract. Rising summer temperatures and more frequent heat extremes are well-documented outcomes of anthropogenic climate change. However, the extent to which atmospheric circulation changes contribu...
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Deepti Singh @climatechirper.bsky.social · 05/01/2026
🥵 📜 New paper on the emergence of trends in humid heat intensity and duration in recent decades over South Asia led by Dr. Jitendra Singh with @sebastian-sippel.bsky.social @erichfischer.bsky.social doi.org/10.1088/2752... via @ioppublishing.bsky.social
doi.org
Emergence of strong trends in humid heat intensity and duration in recent decades over South Asia
Emergence of strong trends in humid heat intensity and duration in recent decades over South Asia, Singh, Jitendra, Singh, Deepti, Sippel, Sebastian, Fischer, Erich
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The Jena Experiment @jena-experiment.bsky.social · 13/11/2025
This week, we had a great retreat with our PhDs, Postdocs & PIs in Leipzig @idiv-research.bsky.social Apart from sharing our progress, we hosted a session on extreme events with guest speakers @sebastian-sippel.bsky.social & @miguelmahecha.bsky.social Thanks for the insightful talks & discussion!
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ELLIS @ellis.eu · 01/10/2025
🚀 New season: AI for Good Webinar Series 𝗙𝗿𝗼𝗺 𝗠𝗼𝗹𝗲𝗰𝘂𝗹𝗲𝘀 𝘁𝗼 𝗠𝗼𝗱𝗲𝗹𝘀 - starting TODAY! @sebastian-sippel.bsky.social (Leipzig University) discusses how past climate events inform future climate risks. 📅 Oct 1st 🕓 17:00-18:00 CEST Sign-up: aiforgood.itu.int/event/unders...
aiforgood.itu.int
Understanding past climate events and trends to constrain near-future climate risk
The global mean surface temperature record —combining sea surface and near-surface air data— is central to understanding climate variability and change.
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Prof. Sonia I Seneviratne @soniaseneviratne.bsky.social · 12/09/2025
Es ist eine grosse Ehre, den 2025 Deutschen Umweltpreis zu erhalten! Danke an alle meine jetzigen und ehemaligen Gruppenmitglieder und viele Kolleg:innen! @lukasgudmundsson.bsky.social @yasserhaddad.bsky.social @yannquilcaille.bsky.social @michaelgwindisch.bsky.social @usyseth.bsky.social
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Johannes Quaas @jquaas.bsky.social · 04/09/2025
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 · 04/09/2025
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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Carbon Brief @carbonbrief.org · 13/06/2025
NEW – Guest post: How climate change is fuelling record-breaking extreme weather | @erichfischer.bsky.social‬ Read here: buff.ly/bnrSvQN
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Erich Fischer @erichfischer.bsky.social · 13/06/2025
High warming rate fuels record-breaking weather The longer our measurements, the fewer record-breaking events we should observe. The opposite is the case - many more records and higher record margins I summarise the key takeaways of our ‪@natrevearthenviron.nature.com article in a guest post.
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Erich Fischer @erichfischer.bsky.social · 13/06/2025
Find the original @natrevearthenviron.nature.com article with important contributions from co-authors Margot Bador, Raphaël Huser, Lizzie Kendon, Alexander Robinson, and @sebastian-sippel.bsky.social rdcu.be/eqPrN
rdcu.be
Record-breaking extremes in a warming climate
Nature Reviews Earth & Environment - Multiple record-breaking climate events have been observed, posing socioeconomic risks. This Review outlines observed and projected changes in...
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Nature Reviews Earth & Environment @natrevearthenviron.nature.com · 02/06/2025
🚨New Review! 'Record-breaking extremes in a warming climate' By ‪@erichfischer.bsky.social, @sebastian-sippel.bsky.social et al. www.nature.com/articles/s43...
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Nature Geoscience @natgeosci.nature.com · 02/06/2025
⚒️ Article: Flash droughts that are accompanied by extreme heat drive more severe and prolonged impacts on global ecosystems @erichfischer.bsky.social @ethz.ch @louiseslater.bsky.social @sebastian-sippel.bsky.social @retoknutti.bsky.social www.nature.com/articles/s41...
Schematic illustrations of the onset mechanisms of compound heat flash droughts and non-heat flash droughts
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Ana Bastos @anabastos.bsky.social · 20/05/2025
How long does it take until we detect forced signals in global and regional land carbon fluxes? And can we use dynamical adjustment to reduce the noise and shorten the detection time? Check out LiNa's paper 👇 egusphere.copernicus.org/preprints/20... Co-advised by @sebastian-sippel.bsky.social
egusphere.copernicus.org
Constraining the time of emergence of anthropogenic signal in the global land carbon sink
Abstract. The global land carbon sink has increased since the preindustrial period, driven by increasing atmospheric CO2 concentration and climate change. However, detecting these anthropogenic signal...
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Tim Osborn @timosbornclim.bsky.social · 20/11/2024
New paper by Sebastian Sippel and colleagues provides evidence that the SST component of most current global temperature datasets is too cold during (roughly) 1900-1930. doi.org/10.1038/s415...
doi.org
Early-twentieth-century cold bias in ocean surface temperature observations - Nature
Independent statistical reconstructions of the global mean surface temperature from either ocean or land data show that existing estimates of early-twentieth-century ocean surface temperatures are too...
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Robert Rohde @rarohde.bsky.social · 22/11/2024
A new paper led by Sebastian Sippel just appeared in Nature arguing that ocean temperature measurements in the early 20th century have a cold bias. It's a fun story illustrating the process of scientific discovery, so let me talk about it a bit. 🧵 www.nature.com/articles/s41...
nature.com
Early-twentieth-century cold bias in ocean surface temperature observations - Nature
Independent statistical reconstructions of the global mean surface temperature from either ocean or land data show that existing estimates of early-twentieth-century ocean surface temperatures are too...
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Reto Knutti @retoknutti.bsky.social · 20/11/2024
Redrawing the global warming stripes. In a new paper led by Sebastian Sippel published in Nature today, we show that the early 20th century global ocean surface temperatures and thereby global mean surface temperature were warmer than previously thought. Thread... (1/13)
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Leipzig Institute for Meteorology @meteoleipzig.bsky.social · 20/11/2024
Breaking News! Seminal paper by our own Sebastian Sippel & colleagues published in Nature @natureportfolio.bsky.social today! They provide evidence that the Sea Surface Temperatures in most current global temperature datasets are considerably too cold (1900-1930): www.nature.com/articles/s41...
nature.com
Early-twentieth-century cold bias in ocean surface temperature observations - Nature
Independent statistical reconstructions of the global mean surface temperature from either ocean or land data show that existing estimates of early-twentieth-century ocean surface temperatures are too...
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