Lars Kaleschke's Avatar

Lars Kaleschke

@seaice.de

Physicist. Climate, sea ice, earth observation @awi.de #Bremen https://orcid.org/0000-0001-7086-3299 https://det.social/@seaice

2,713
Followers
979
Following
303
Posts
25.09.2023
Joined
Posts Following

Latest posts by Lars Kaleschke @seaice.de

Preview
The world is getting hotter faster — its pace nearly doubled in the past decade Earth is now warming at a rate of around 0.35 ºC per decade, fresh analysis finds.

The world is getting hotter faster — its pace nearly doubled in the past decade

www.nature.com/articles/d41...

06.03.2026 15:13 👍 9 🔁 13 💬 0 📌 0
Video thumbnail

Greetings from Kyiv.

I came to the railway station to visit an exhibition — and instead saw this:
a concert by the State Emergency Service of Ukraine.

Wow. I want you to hear this.

06.03.2026 13:46 👍 525 🔁 145 💬 52 📌 15
Preview
MARUM LiveDive - Expedition Livestream YouTube video by marumTV

Watch the livestream from R/V Sonne now!

MBARI scientists and engineers have joined an expedition led by the @marumunibremen.bsky.social to study the cold seeps offshore of Southern California.
www.youtube.com/live/IrJ1kVs...

04.03.2026 18:43 👍 16 🔁 8 💬 0 📌 0
Time series graph showing the Baltic Sea annual maximum ice extent in 1900-2026.

Time series graph showing the Baltic Sea annual maximum ice extent in 1900-2026.

The sea ice extent in the Baltic Sea probably reached its maximum on 20 February 2026, when the extent was 181,000 km².

Based on the maximum, this was the most widespread ice cover in the Baltic Sea since 2011, and overall the 5th harshest ice winter in the 21st century.

04.03.2026 09:44 👍 39 🔁 13 💬 1 📌 0
Post image

The AMSR2 data since 2012 agrees upon the maximum. What is your data source for the long time period?

seaice.de/nh_Baltic_se...

04.03.2026 10:27 👍 1 🔁 0 💬 1 📌 0
Preview
Energiewende: Dieser Krieg ist eine Mahnung Widersprüche bargen die Pläne für das neue Gebäudegesetz genug: technisch, chemisch, physikalisch. Nun zeigt auch noch der Krieg am Golf, welcher Irrweg Öl und Gas sind.

Womöglich fällt es Merz und Reiche ja auf, wenn sie nun die Kriegsnachrichten vom Golf lesen, wie oft darin das Wortpaar "Öl und Gas" auftaucht. Huch, genau das Zeug, das sie die Deutschen noch viel länger verheizen lassen wollen! … – Mein Kommentar für @zeit.de
www.zeit.de/wissen/2026-...

03.03.2026 17:47 👍 58 🔁 19 💬 0 📌 1

Spotted them penguins 🤩

24.02.2026 15:26 👍 3 🔁 1 💬 0 📌 0
Video thumbnail

And here is the current position and track of RV Polarstern.

seaice.de/AMSR2_SIC-LE... (daily-updated)

24.02.2026 14:21 👍 3 🔁 0 💬 0 📌 0
Preview
Webcam Polarstern 180 Livestream - AWI SWOS 2026 - PANOMAX 360° Live picture of Polarstern 180 Livestream - AWI SWOS 2026 - Panomax - 360° high resolution interactive panorama web cam

By the way, you can currently spot a few penguins on the live camera from RV Polarstern. 🐧❄️😍 (Feb 24, 14:06)

The Panomax camera provides a high-resolution, interactive 360° view directly from the ship.

awi.panomax.com/180
#Antarctic 🌊

24.02.2026 14:21 👍 3 🔁 1 💬 2 📌 1
Preview
Active-passive microwave scattering in the Antarctica wind-glazed region: an analog for icy moons of Saturn Abstract. Microwave radiometry and scatterometry, two complementary modes of sensing the composition and structure of the upper meters to hundreds of meters of the subsurface, are often difficult to r...

New paper alert 🪐🌍🧊🛰️

Bonnefoy, L. E., Prigent, C., Picard, G., Soriot, C., Le Gall, A., Kilic, L., and Jimenez, C.: Active-passive microwave scattering in the Antarctica wind-glazed region: an analog for icy moons of Saturn, The Cryosphere, 20, 1297–1314, doi.org/10.5194/tc-2..., 2026.

19.02.2026 15:57 👍 1 🔁 0 💬 0 📌 0
Photo showing a tall, jagged ice front of the Ronne Ice Shelf in West Antarctica rising above the calm surface of the Weddell Sea. Credit: Torsten Albrecht / PIK.

Photo showing a tall, jagged ice front of the Ronne Ice Shelf in West Antarctica rising above the calm surface of the Weddell Sea. Credit: Torsten Albrecht / PIK.

🔔🚨 New Publication Alert!

Research has shown that the Antarctic Ice Sheet is a climate tipping element.

We found: it’s not one — it’s many.

📄 Paper (open access): www.nature.com/articles/s41...

📢 Press release: www.pik-potsdam.de/en/news/late...

Tread below 🧵👇

16.02.2026 11:50 👍 139 🔁 64 💬 4 📌 10
U.S. annual electric power sector generation by source billion kilowatthours
forecast

Solar is now the dominant source of new U.S. power capacity and is on track to surpass coal in total installed capacity before the end of 2026. 

70 GW of new solar capacity is scheduled to come online in 2026–2027 → a 49% increase in operating solar capacity from the end of 2025.

4,500
4,000
3,500
3,000
solar wind
hydropower
2,500
natural gas
2,000
1,500
coal
1,000
nuclear
500
0
other
2021
2023
2025
2027
eia
share of total U.S. generation forecast
45%
40%
35%
30%
25%
20%
15%
10%
5%
0%
2021
2023
2025
2027
Data source: U.S. Energy Information Administration, Short-Term

U.S. annual electric power sector generation by source billion kilowatthours forecast Solar is now the dominant source of new U.S. power capacity and is on track to surpass coal in total installed capacity before the end of 2026. 70 GW of new solar capacity is scheduled to come online in 2026–2027 → a 49% increase in operating solar capacity from the end of 2025. 4,500 4,000 3,500 3,000 solar wind hydropower 2,500 natural gas 2,000 1,500 coal 1,000 nuclear 500 0 other 2021 2023 2025 2027 eia share of total U.S. generation forecast 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% 2021 2023 2025 2027 Data source: U.S. Energy Information Administration, Short-Term

This is why Donald Trump had to be made president by his fossil fuel handlers: desperation. Why he fights climate science on their behalf: desperation.

US media have failed miserably at pointing out the lies and the damage the climate crisis is doing already. Solar still wins.

14.02.2026 10:48 👍 226 🔁 86 💬 5 📌 2
Drift + Noise Website Job Announcement: Senior Position for Technical Sales & Consulting (m/f/d) We are looking for a Technical Sales and Consulting professional with an understanding of the maritime industry to help expan...

If someone looks for a sea-ice related job in industry: driftnoise.com/senior-posit...

13.02.2026 10:14 👍 1 🔁 0 💬 0 📌 0
Post image

For all German speakers out there:
This month's #SCARCBET feature highlights @awi.de "Komm an Bord"! I

Sandra and Steffi are heading to Antarctica on board the research icebreaker RV Polarstern and will be sharing their journey along the way:
🛳️ www.awi.de/forschung/na...

12.02.2026 12:22 👍 0 🔁 1 💬 0 📌 0
Video thumbnail

Polarstern-centered sea-ice animation with recent ship track
seaice.de/AMSR2_SIC-LE...

The SWOS Polarstern has just started, heading into a rapidly changing Southern Ocean 🌊
www.awi.de/en/about-us/... #Antarctic #Climate

11.02.2026 19:17 👍 3 🔁 0 💬 0 📌 0
Preview
Norway defence chief says Russia could invade to protect nuclear assets Exclusive: Eirik Kristoffersen, who served in Afghanistan, rejects Trump’s claim that Nato troops stayed off frontlines

“He said Russian actions in the far north had generally been less aggressive than those in the Baltic Sea.
“So far, what we have seen of airspace violation in our area has been misunderstandings. Russia is conducting a lot of [GPS] jamming, and we think that the jamming also affects their aircraft.”

11.02.2026 07:25 👍 3 🔁 1 💬 0 📌 0

AWI’s gain is IARC’s loss

10.02.2026 14:59 👍 14 🔁 1 💬 2 📌 0
Portrait Hajo Eicken

Portrait Hajo Eicken

Prof. Dr Hajo Eicken is the new director of the Alfred Wegener Institute! Born in Bremerhaven, the glaciologist will relocate from Alaska to take up his position as scientific director on 20 March. 🎉⚓

www.awi.de/en/about-us/...

@helmholtz.de

📸: University of Alaska Fairbanks

10.02.2026 10:24 👍 25 🔁 7 💬 0 📌 1
Prof. Dr. Hajo Eicken wird neuer Leiter des Alfred-Wegener-Instituts - AWI On 20 March 2026, the glaciologist will take over as scientific director of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI). To date, he has been active as the director of the International Arctic Research Center at the University of Alaska in Fairbanks.

www.awi.de/en/about-us/...

10.02.2026 10:03 👍 7 🔁 2 💬 0 📌 1
Preview
Öffentliche Führungen Die Weserburg Museum für moderne Kunst ist Bremens Haus für internationale Kunst der Gegenwart. Wechselnde Einzel- und thematische Gruppenausstellungen sowie eine langfristig angelegte Sammlungspräsen...

🧊 1/n Freue mich schon sehr auf die Führung durch die tolle Ausstellung #ColdAsIce in der Weserburg in #Bremen am kommenden Sonntag (15.02.2026 um 11:30 Uhr). Es geht um Kälte in der Kunst und Gesellschaft.
@awi.de
weserburg.de/veranstaltun...

09.02.2026 11:23 👍 26 🔁 3 💬 3 📌 0
Preview
UC San Diego-Led Science Team Selected for NASA Satellite Mission The Earth Dynamics Geodetic Explorer (EDGE) satellite is one of two next generation satellites selected by NASA to help better understand Earth and improve capabilities to foresee environmental events...

Learn more about EDGE, and join us in congratulating Dr. Fricker and the EDGE team! ⤵️
scripps.ucsd.edu/news/uc-san-...

06.02.2026 23:32 👍 10 🔁 1 💬 0 📌 0
Beyond L-Band: Wideband (0.4–2 GHz) Radiometry for Observing Surface Salinity in Cold Seawater Sea surface salinity (SSS) is a key variable for understanding ocean circulation, freshwater fluxes, and climate variability. While L-band radiometry (1.4 GHz)

dx.doi.org/10.2139/ssrn...

06.02.2026 15:07 👍 3 🔁 1 💬 0 📌 0
Post image

Polarstern will be departing Punta Arenas for the Weddell Sea🚢 Until April, an AWI-led team will study sea ice, ice shelves, and ocean interactions in this key climate region, where summer sea ice has declined since 2017, presumably as a result of warmer surface water.

www.awi.de/en/about-us/...

06.02.2026 13:03 👍 13 🔁 8 💬 2 📌 0
Preview
Sea Ice Floe Segmentation in Close‐Range Optical Imagery Using Active Contour and Foundation Models Gradient vector flow active contours are compared with the Segment Anything Model to segment sea ice floes in close-range optical imagery The Segment Anything Model guided by prompts provides rob...

Antarctic sea ice is made of thousands of moving pieces.
New research shows how we can map and measure them from close-range images, even in winter conditions.

dx.doi.org/10.1029/2025...

06.02.2026 11:42 👍 3 🔁 2 💬 0 📌 0
Sea ice thickness map from satellites

Sea ice thickness map from satellites

Sea ice thickness map from FMI

Sea ice thickness map from FMI

Also nice to see that your maps agree quite well to our sea ice thickness product.

data.marine.copernicus.eu/-/zink2qbge7

05.02.2026 12:33 👍 2 🔁 0 💬 0 📌 0
Preview
Lead and Floe Detection From CryoSat‐2 Radar and ICESat‐2 Laser Altimetry The CryoSat-2 and ICESat-2 satellite altimeters provide invaluable data for resolving small-scale sea ice features across the Arctic Because CryoSat-2 and ICESat-2 differ in their geometric and r...

📣 New research by Rachel Tilling examines how different satellites track Arctic sea ice 'leads' and 'floes'. This is crucial for understanding how sea ice is changing seasonally and over the longer-term.

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

05.02.2026 12:13 👍 7 🔁 4 💬 0 📌 0
Preview
Researcher (294200) | Norwegian Meteorological Institute Job title: Researcher (294200), Employer: Norwegian Meteorological Institute, Deadline: Monday, February 23, 2026

📢 We are hiring at MET!

Position 1 (location in Tromso or Oslo)
Focus on climate and sea ice remote sensing using passive microwave sensors
👉 www.jobbnorge.no/en/available...

🕒 2-year position linked to projects with ESA.

Please help spread the word and boost 🦋⏩📧

#Climate #SeaIce #RemoteSensing

05.02.2026 11:41 👍 6 🔁 9 💬 1 📌 0
World's First: Unitree Humanoid Robot Autonomous Walking Challenge in −47.4°C Extreme Cold
World's First: Unitree Humanoid Robot Autonomous Walking Challenge in −47.4°C Extreme Cold YouTube video by Unitree Robotics

Give it a drill to extract ice cores!

youtu.be/SX4WKUHAP4E

04.02.2026 20:03 👍 1 🔁 0 💬 0 📌 0
Preview
Self-supervised learning reduces labelling requirements for sea ice segmentation in Sentinel-1 SAR imagery Abstract. Monitoring Arctic sea ice variability is crucial for maritime safety. Synthetic Aperture Radar (SAR) imagery provides an effective means of achieving this through all-weather, day-and-night ...

New preprint alert!

This manuscript is now open for discussion and under review in Earth Observation (EO).

🌍🛰️ Bonus: it’s the very first preprint for the new @egu.eu Journal!

egusphere.copernicus.org/preprints/20... @jlbamber.bsky.social @egu-cr.bsky.social
@egu-cl.bsky.social

04.02.2026 10:15 👍 4 🔁 1 💬 0 📌 0
Preview
Self-supervised learning reduces labelling requirements for sea ice segmentation in Sentinel-1 SAR imagery Abstract. Monitoring Arctic sea ice variability is crucial for maritime safety. Synthetic Aperture Radar (SAR) imagery provides an effective means of achieving this through all-weather, day-and-night ...

New preprint alert!

This manuscript is now open for discussion and under review in Earth Observation (EO).

🌍🛰️ Bonus: it’s the very first preprint for the new @egu.eu Journal!

egusphere.copernicus.org/preprints/20... @jlbamber.bsky.social @egu-cr.bsky.social
@egu-cl.bsky.social

04.02.2026 10:15 👍 4 🔁 1 💬 0 📌 0