Lars Kaleschke
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seaice.de
Lars Kaleschke
@seaice.de
2.7K followers 940 following 280 posts
Physicist. Climate, sea ice, earth observation @awi.de #Bremen

https://orcid.org/0000-0001-7086-3299
https://det.social/@seaice
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seaice.de
Imagine the image below fits into 1-2 pixels of this animation. #AntarcticaDay
December 1, 2025 at 4:02 PM
seaice.de
The Arctic has just set a new record low for this time of year.
As of 26 November 2025, sea ice extent is the lowest on record for the date based on OSI SAF sea ice climate data (1978–2024).

Image from @osi-saf.eumetsat.int cryo.met.no/en/sea-ice-i...

#Arctic #Climate
Arctic sea ice extent plot showing 2025-11-26 being the lowest for the day.
November 27, 2025 at 10:50 AM
seaice.de
🇨🇦 🇦🇹 🇱🇻 🇵🇱 🇩🇰 🇨🇭 🇫🇮 🇬🇷 🇪🇪 🇫🇷 🇳🇱 🇸🇪 🇧🇪 🇩🇪 🇷🇴 🇪🇸 🇮🇹 🇵🇹 🇬🇧 🇨🇿 🇳🇴 🇭🇺 🇸🇮

Welcome to #Bremen! #CM25

Livestream starts at 13:30 watch.esa.int/two/ 🤞
Entrance of Messe Bremen where CM25 takes place.
November 26, 2025 at 11:16 AM
seaice.de
Just love watching the Arctic sea ice grow!
November 7, 2025 at 7:22 AM
seaice.de
"We find that retreat commenced immediately after the loss of decade-old fast ice in the Larsen B embayment"
www.nature.com/articles/s41...

The animation shows the changing sea ice condition at the former Larsen B ice shelf in 2022 compared to 2017.
#Antarctic #SeaIce #Glacier #Climate
November 5, 2025 at 9:55 AM
seaice.de
Operational processing of the Level-4 (L4) CryoSat-2/Sentinel-3/SMOS (CS3SMOS) sea ice thickness product has been started for the Arctic 2025/26 winter season. The product version has seen a major upgrade from v206 to v300.
#Arctic #Climate @esaclimate.bsky.social

spaces.awi.de/spaces/CS2SM...
Sea ice thickness from CryoSat-2/Sentinel-3/SMOS in the northern hemisphere from October 15 to October 21, 2025 (near real-time processing)
October 23, 2025 at 4:16 PM
seaice.de
Operational processing and dissemination of the Level 3 SMOS Sea Ice Thickness product have resumed for the winter season 2025/26.

Unfortunately, RFI-induced data gaps continue to affect the #Barents–Kara sector of the #Arctic #Ocean.

🛰️🌊🌍

doi.org/10.57780/sm1...
SMOS sea ice thickness map for the Arctic on 15/10/2025 with some data gaps in the Barents–Kara or European Arctic sector of the Arctic Ocean.
October 17, 2025 at 1:34 PM
seaice.de
Die obige Darstellung ist relativ zur globalen Erwärmung. Hier die absolute Erwärmung.

ed-hawkins.github.io/climate-visu...
September 27, 2025 at 8:45 AM
seaice.de
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.
September 23, 2025 at 11:07 AM
seaice.de
We are still about 4 weeks away from the maximum, but it is still worth noting that #Antarctic sea ice has reached its second lowest value for the day since the satellite records began.
Antarctic sea ice extent seasonal plot showing this year with the 2nd lowest value for the day.
August 13, 2025 at 9:58 AM
seaice.de
🦭😍🌊

awi.panomax.com/ice1_water?t... #CONTRASTS
A seal under the sea ice. A measurement stick behind.
August 8, 2025 at 10:02 AM
seaice.de
Wow, what #CONTRASTS!

follow-polarstern.awi.de/blog/07-08-2...
August 7, 2025 at 9:46 AM
seaice.de
#Polynya watch 👀:
The sea ice over Maud Rise is thinning. The next days will show if an open water polynya is developing. 🌊

#Antarctic #Seaice #Climate

doi.org/10.57780/sm1...
SMOS sea ice thickness map showing thin ice over Maud Rise.
August 6, 2025 at 8:16 PM
seaice.de
The retreat of #Arctic sea ice gains its usual summer momentum. The #Pacific side remained strong this year, with the Beaufort Sea remaining relatively high, while the Chukchi Sea declined significantly.
August 5, 2025 at 12:04 PM
seaice.de
This DOE writing is really absolute crap! I just took a look at it, I wouldn't let a student get away with that. They write about #Arctic sea ice, but link to a plot about #Antarctic sea ice. The cited ref has also not yet been reviewed. Tellingly, the DOE and its authors do not know what a DOI is.
Arctic sea ice extent has declined by about 5 percent since 1980 (https://nsidc.org/data/seaice_index/images/s_plot_hires.png), although following 2007 there has been a pause in the Arctic sea ice decline (England et al., 2025).
August 4, 2025 at 7:49 AM
seaice.de
#Antarctic #SeaIce July 2025. One interesting feature is the huge iceberg A23a returning south at about 30 W.
August 2, 2025 at 12:29 PM
seaice.de
In recent days, a lot of sea ice in the #Arctic has melted. We'll see how much actually remains this year in mid-September.
July 31, 2025 at 11:05 AM
seaice.de
RV Polarstern returned to ice floe number one. You can follow the field work live on the webcam.

#CONTRASTS #ARCTIC 🌊❄️
awi.panomax.com/ice1_surface
follow-polarstern.awi.de?lang=en
July 26, 2025 at 2:05 PM
seaice.de
Wow, what‘s this???

#Arctic #Ocean 🌊

panomax-prod-download.s3.de.io.cloud.ovh.net/853113935/aw...
Something red under the sea ice
July 19, 2025 at 9:04 PM
seaice.de
With the southerly winds, the Polarstern is drifting northward. The temperatures cause melting. Current data can be found on the #CONTRASTS dashboard. #Arctic #Seaice

data.meereisportal.de/relaunch/con...
July 11, 2025 at 6:05 AM
seaice.de
The developing polynya north of Greenland looks impressive. It will likely open a bit further in the coming days. The sea ice is being pushed away from the coast by the prevailing southerly winds. This area is usually covered with sea ice.
#Arctic #SeaIce #AMSR2 #CONTRASTS
July 10, 2025 at 7:18 AM
seaice.de
Soon you may be able to see the french Tara Polar Station in the live camera from RV Polarstern. An interesting meeting before the #CONTRASTS expedition. 🌊 #Arctic #Climate

awi.panomax.com/180
Position of TARA Polar Station and Polarstern
July 4, 2025 at 12:58 PM
seaice.de
Is this animation of better quality? Original image source: seaice.de/AMSR2_Antarc...
July 2, 2025 at 10:50 AM
seaice.de
Wow! #Iceberg #A23a has drifted back south into the animation window. Almost at 30°W. #Antarctic 🌊
July 2, 2025 at 10:46 AM
seaice.de
Exactly five years ago today, Polarstern left the #MOSAIC sea ice floe behind. The return journey wasn't always easy, but it went well when there was an open lead like shown in this timelapse. 🌊🧪
May 16, 2025 at 8:31 AM