Lightnews — Scholar-powered news

Reposted by Lars Kaleschke

Thomas Bauska @tinyicybubbles.bsky.social · 11h

Updated a classic.

1 18 56

Reposted by Lars Kaleschke

Ruth Mottram @ruthmottram.bsky.social · 1d

🚨 New @oceaniceeu.bsky.social preprint🚨 why has Antarctica stopped (net) losing mass, in spite of increased discharge?
Declining sea ice is part of the answer but increasingly heavy and frequent atmospheric rivers are most important factor.

Lots of important subtleties:
arxiv.org/abs/2510.03590

Screenshot of figures from the paper: Above a graph showing wiggly lines depicting the cumulative mass budget of Antarctica: a dark line swoops and wiggles downwards before stabilising at the end, colourful dashed lines (depicting snow fall) wiggle along constantly before sloping upwards at the same tme stabilisation occurs.
Below 6 maps of Antarctica in blues and red depicting the mass change in different basins.

1 14 32

Lars Kaleschke @seaice.de · 2d

doi.org/10.1017/S003...

4

Reposted by Lars Kaleschke

Guido Grosse @grosseguido.bsky.social · 5d

I am happy to announce that we received major funding from Schmidt Sciences under their VICC program to study rapid #Permafrost Thaw Carbon Trajectories (PeTCaT). The 5-year project led by my team @awi.de partners with an international team to quantify how rapid thaw contributes to climate change.

Schmidt Sciences @schmidtsciences.bsky.social · 6d

We're investing $45M over 5 years to launch the Virtual Institute for the Carbon Cycle (VICC).

Four global teams will combine AI, advanced observations & modeling to close major carbon cycle gaps, strengthening climate projections worldwide.

🔗 buff.ly/8WVpM9s
WIRED coverage: buff.ly/YsLAcRZ

Schmidt Sciences awards $45M to narrow carbon cycle knowledge gap - Schmidt Sciences

Globe-spanning interdisciplinary teams will dramatically improve climate modeling to drive better energy, environmental, economic decision making Contact: Carlie Wiener, [email protected]…

www.schmidtsciences.org

1 3 11

Reposted by Lars Kaleschke

Linus Vogt @linusvogt.bsky.social · 6d

🚨🌊 New highlight paper out today in Earth System Dynamics!

We find an observational constraint implying more future global ocean heat uptake, cloud feedback, and warming than the CMIP6 mean.

This contrasts with previous estimates based on past warming trends.

🔗 esd.copernicus.org/articles/16/...

Increased future ocean heat uptake constrained by Antarctic sea ice extent

Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

esd.copernicus.org

3 9 30

Reposted by Lars Kaleschke

Zack Labe @zacklabe.com · 10d

"After nearly 40 years, the Arctic Research Consortium of the United States, or ARCUS, will close September 30."

"The Arctic Research Consortium of the United States funded programs that aided Indigenous communities and tracked melting sea ice, among dozens of initiatives."

After Trump cut the National Science Foundation by 56 percent, a venerable Arctic research center closes its doors

The Arctic Research Consortium of the United States funded programs that aided Indigenous communities and tracked melting sea ice, among dozens of initiatives.

grist.org

14 260 410

Reposted by Lars Kaleschke

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.

7 37 130

Reposted by Lars Kaleschke

Gereon Asmuth @gereonas.bsky.social · 12d

Drei Grad mehr schon 2050: Klimaforscher:innen warnen vor schneller werdender Erderhitzung, die die heute lebenden Treffen wird. Es ist Zeit zu handeln. Jetzt. Sofort. Radikal. Mein Kommentar @taz.de
taz.de/Warnung-vor-...

Warnung vor noch größerer Klimakrise: Unfassbare drei Grad mehr für die heute Lebenden

Es ist Zeit zu handeln. Jetzt. Sofort. Radikal. Die menschengemachte Erderhitzung kann nicht mehr gestoppt, nur noch ein bisschen abgemildert werden.

taz.de

7 29 95

Reposted by Lars Kaleschke

Gereon Asmuth @gereonas.bsky.social · 11d

Hier noch die Fakten zur „3 Grad mehr schon 2050“ Diskussion von meiner @taz.de Kollegin @susanneschwarz.bsky.social
#Klimawandel
taz.de/Klimakrise-e...

Klimakrise eskaliert: Die Angst vor drei Grad Erderhitzung

Deutsche Klimaexpert*innen warnen davor, dass die Klimakrise noch deutlich schneller eskaliert als erwartet. Das ist in der Fachwelt umstritten.

taz.de

1 4 6

Lars Kaleschke @seaice.de · 11d

Die Antarktis ist sehr träge im Klimasystem, ein schlafender Riese sozusagen. Sehr viel Eis und Ozean. Reagiert auf längeren Zeitskalen.

1 4

Lars Kaleschke @seaice.de · 11d

Die obige Darstellung ist relativ zur globalen Erwärmung. Hier die absolute Erwärmung.

ed-hawkins.github.io/climate-visu...

1 1 1

Lars Kaleschke @seaice.de · 12d

Bremen’s Mayor Bovenschulte (SPD) slams Germany’s 2026 space budget: too little for ESA & national programs, breaking coalition promises. Calls for stronger investment ahead of the ESA ministerial in Bremen. #Space #ESA #Germany

www.spiegel.de/wirtschaft/b...

Bremen: Bürgermeister Andreas Bovenschulte kritisiert kleines Budget für Raumfahrt

»Die Kohle fließt nicht«: Der Bund will die Raumfahrt stärken, doch jetzt gibt es heftige Kritik aus Bremen an Ministerin Dorothee Bär. Bürgermeister Andreas Bovenschulte fordert deutlich mehr Geld fü...

www.spiegel.de

3

Lars Kaleschke @seaice.de · 12d

“Launched under President Trump“

www.jpl.nasa.gov/news/nasa-is...

NASA-ISRO Satellite Sends First Radar Images of Earth’s Surface

Preliminary images from the most powerful Earth radar satellite ever launched offer a tantalizing glimpse of the science the mission will be able to deliver.

www.jpl.nasa.gov

3

Reposted by Lars Kaleschke

Richard Davy @davyclimate.bsky.social · 14d

We have a new paper out today taking a fresh look at sea ice age, showing how this variable offers new insights into Arctic climate change:
A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics

We applied the same algorithm for diagnosing sea ice age in observations to a climate model for the first time The derived sea ice age reproduces the model dynamics but has much lower bias compar...

agupubs.onlinelibrary.wiley.com

1 5 8

Lars Kaleschke @seaice.de · 15d

Remember Exxon Valdez? A similar event in the sea-ice-covered #Arctic would be far more devastating.

The Barents Observer @thebarentsobserver.com · 15d

Russian authorities are green-lighting ships without ice-class on the Northern Sea Route. This month, it could have ended in catastrophe

Moscow pushes Arctic shipping towards disaster

Russian authorities are green-lighting ships without ice-class on the Northern Sea Route. This month, it could have ended in catastrophe.

www.thebarentsobserver.com

3 15

Lars Kaleschke @seaice.de · 15d

The rapture is over. The data is flowing again.

5

Lars Kaleschke @seaice.de · 15d

The rapture has just begun at the North Pole! First, there was a slight jitter, and then all the data was lost and remains in space.

1 1 7

Reposted by Lars Kaleschke

Markus Pössel @mpoessel.de · 15d

Vergesst die Doktorarbeits-Plagiatsskandale. Ministerium-schreibt-unkritisch-Forderungen-bestimmter-Lobbygruppen-ab-Skandale sind politisch letztlich viel brisanter. Und wenn sie dem eigenen Monitoring-Bericht widersprechen, dann erst recht.

Malte Kreutzfeldt @mkreutzfeldt.bsky.social · 15d

Zusammen mit dem Monitoring-Bericht zur Energiewende hat Katherina Reiche in der letzten Woche einen Zehn-Punkte-Plan vorgestellt. Dieser weist sprachlich wie inhaltlich große Ähnlichkeiten zu einem Papier von RWE und Eon aus dem Frühjahr auf. Ein längerer Thread mit Links und Beispielen. (1/19)

2 37 130

Lars Kaleschke @seaice.de · 15d

This hopefully short interruption affects most sea ice information sources. It makes us realize again how dependent we are on this satellite data. Without it, we are virtually blind to the global picture.

gportal.jaxa.jp/gpr/notice/n...

G-Portal earth observation satellite data providing system

The satellite observation data provided by G-Portal can be downloaded free of charge after user registration.

gportal.jaxa.jp

4

Reposted by Lars Kaleschke

Remote Sensing of Polar Regions, University of Bremen @polarbremen.bsky.social · 19d

Are you interested in the regional differences of melt pond formation and evolution in the Arctic? Or did you ever wonder how these are related to the sea ice surface topography and ice types? Then check out our new paper: tc.copernicus.org/articles/19/...

Regional and seasonal evolution of melt ponds on Arctic sea ice

Abstract. Melt ponds on sea ice significantly modify the absorption of solar radiation by the sea ice-ocean system in the Arctic, thereby influencing the energy budget and sea ice mass balance. Conseq...

tc.copernicus.org

1 3

Reposted by Lars Kaleschke

Henning Krause (he/him) prefers Mastodon @hnnng.de · 19d

Lebe stets so, dass die 💩fD Dich als Quasselwissenschaftler und Heulsusenprojekt bezeichnet. Proud member of #SciCommSupport.

scicomm-support.de/2025/arbeit-...

1 7

Reposted by Lars Kaleschke

Signe Aaboe @signeaaboe.bsky.social · 20d

Lucky you - It's not too late to register for tomorrow's daybinar on sea ice 😉

🧪🥼❄️🌊⚒️

Signe Aaboe @signeaaboe.bsky.social · Jul 15

📣 Join our Webinar "Beyond Sea Ice Area" on September 19th.

Sea Ice Age is the focus🔎

Main topics:
1. Review ECV sea ice products
2. Refine sea ice age product
3. Explore polar data issues

For more information and registration, 👉https://forms.gle/Ure5JxiGUZsYyjuf9
Please repost and share

#ESA

Photo showing ice floes in the Arctic. Photo by Olaf Schneider, Norwegian Polar Institute, Norway.

2 3

Reposted by Lars Kaleschke

heiseonline @heise.de · 20d

Der Forschungseisbrecher "Polarstern 2" erhält die weltweit größten 360-Grad-Antriebe. Bis das Schiff in See stechen kann, dauert es aber noch. #Forschung

Forschungseisbrecher "Polarstern 2" erhält weltweit größten 360-Grad-Antrieb

Der Forschungseisbrecher "Polarstern 2" erhält die weltweit größten 360-Grad-Antriebe. Bis das Schiff in See stechen kann, dauert es aber noch.

www.heise.de

3 17

Reposted by Lars Kaleschke

Dr. Melanie Bergmann @melaniebergma18.bsky.social · 20d

Auch in #Bremen gibt es eine #KlimaDemo (Kundgebung mit Fotoaktion) für unsere Existenz dank #Klimaschutz! Dazu gehört die Fortführung der #Energiewende, auch unter Reiche, und der Verkehrswende mit dem #DeutschlandTicket!

📆 20.9.25
🕰️ 13:30 Uhr
📍 Vor dem Überseemuseum

#ExitGasEnterFuture

1 8 15

Reposted by Lars Kaleschke

Fabrice Ardhuin @fabriceardhuin.bsky.social · 21d

🌊 I've been working on the SWOT satellite for some time, and on ocean waves even longer, including as the science lead for @esaearth.esa.int SeaState Climate Change Initiative. This paper is about the largest ocean waves, looking back at 34 years of data www.umr-lops.fr/en/SWOT-reve...

SWOT reveals the largest ocean waves

Building on the 34 years of wave height measurements by satellite and the capabilities of the new SWOT satellite, a study reveals a new record for the highest ocean waves ever measured in the open oce...

www.umr-lops.fr

4 4 14