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Lars Kaleschke

@seaice.de

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

331 Posts2752 Follower990 Folgt
Zeke Hausfather@zekehausfather.com · 3d ago

I'm not sure folks have realized just how crazy the second half of 2026 and 2027 will be for global temperatures – on the back of a record-smashing El Niño event. Here is my latest estimate of where both years will end up compared to global temperatures since 1850.

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Alfred Wegener Institute@awi.de · 5d ago

The SYNCHRONY project, led by the AWI, will start on 1 August 2026. It will strengthen observations in the Southern Ocean, improve our understanding of changes to the ocean, ice and atmosphere, and lay the groundwork for the UN Ocean Decade initiative, Antarctica InSync. www.awi.de/en/about-us/...

A new observing system for the Southern Ocean

The EU project SYNCHRONY will launch on August 1st, 2026. It aims to contribute to a better understanding of the rapid changes taking place in the complex system comprising the ocean, ice and atmosphe...

awi.de

Lars Kaleschke@seaice.de · last wk.

New publication - the second article in EGU’s new journal, Earth Observation: Shukla, S. et al.: Inferring effective firn grain size across Antarctic ice shelves from ASCAT observations, Earth Obs., 1, 15–41, doi.org/10.5194/eo-1..., 2026.

Inferring effective firn grain size across Antarctic ice shelves from ASCAT observations

Abstract. The stability of Antarctic ice shelves is closely linked to the properties of the firn layer, which regulates meltwater retention and influences ice shelf vulnerability to hydrofracturing. F...

doi.org

Robert Rohde@rarohde.bsky.social · 2w ago

See the alternating warm and cold patches in the Northern mid-latitudes? That's the imprint of a quasi-stationary Rossby wave (i.e. oscillations in the jet stream). It's rare to see it so clearly in a monthly-average temperature map.

Map of temperature anomalies in June 2025 relative to the 1951-1980 average.
Lars Kaleschke@seaice.de · 2w ago

The persistent polynya along the flanks of Maud Rise indicates weak stratification and availability of subsurface heat. #Antarctica #SeaIce #Ocean 🌊🛰️🌍🧊❄️

Lars Kaleschke@seaice.de · 2w ago

A patch of open water around Maud Rise sea mount is proving stubborn to freeze as Antarctic winter sea ice advances. Interesting to watch, but not unprecedented. Open-ocean polynyas have appeared here before, huge in the 1970s and again in 2017. #antarctic #seaice #climate

Susan Howard@slhowardcryo.bsky.social · 2w ago

Excited to share our new paper that has just been published in GRL. We show that the “SWOT” satellite, designed for surface water and ocean topography studies, can also measure changes in the Antarctic ice shelves. Also grateful for my amazing co-authors that helped get this through to publication.

Earth and Space Research@earthspaceresearch.bsky.social · 2w ago

A new paper led by ESR’s @slhowardcryo.bsky.social shows that the NASA/CNES “SWOT” satellite, designed for surface water and ocean topography studies, can also measure changes in the Antarctic ice shelves: doi.org/10.1029/2026... 1/3

Lars Kaleschke@seaice.de · 2w ago

A patch of open water around Maud Rise sea mount is proving stubborn to freeze as Antarctic winter sea ice advances. Interesting to watch, but not unprecedented. Open-ocean polynyas have appeared here before, huge in the 1970s and again in 2017. #antarctic #seaice #climate

Zeke Hausfather@zekehausfather.com · 2w ago

The Niño 3.4 region of the tropical Pacific has been hovering above 2C for the past week. This is the threshold for a very strong ("super") El Niño event, and it was reached more than a month before the prior record set during 1997/1998:

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@aederocher.bsky.social · 3w ago

Most W. Hudson Bay polar bears are hanging on to the last bits of ice. It feels unusual but we'll need to analyze sea ice data. Staying out on the ice with so little left is odd (note ice image is a week earlier - only clear day). Shifting behaviour by the bears or perhaps need to add more weight?

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Richard Allan@rpallanuk.bsky.social · 3w ago

In the journey towards tipping points, aspects of the #climate system can become more volatile. Commentary by @alevermann.bsky.social in @nature.com argues that the impacts of increasing regional instability of ocean, ice & atmosphere have not so far been properly assessed: doi.org/10.1038/d415...

‘Climate free fall’: why the biggest risk to our economies is yet to be recognized

Increasing instability of the ocean, ice and atmosphere threatens farming, finance and society. We all need to wake up to that fact.

doi.org

Enno Park@ennopark.de · 3w ago

Ach Tagesschau, nicht mal New York auf einer Karte richtig einzeichnen könnt ihr. (Und sagt nicht, ihr meint den Staat, der Artikel bezieht sich u.a. auf die schlechte Luft beim Endspiel in NY City und beim Staat hättet ihr eine Fläche nehmen müssen.) – Lass mich raten: War's die KI?

Karte von Nordamerika mit Teilen von Kanada und den USA. Der kanadische Staat Ontario ist hervorgehoben. Die Städte Toronto und New York sind mit Punkten markiert, wobei New York mehrere 100 km entfernt an einer falschen Stelle eingezeichnet wurde in der der Nähe von Syracuse.
Zack Labe@zacklabe.com · 3w ago

Thursday El Niño update - Conditions remain favorable for further strengthening, with a number of similarities to the big 1997 event. The warm pool continues to stretch quite far east, and there's just already a remarkable amount of warmth across the tropical Pacific. Data from NOAA OISSTv2.1 🌊

Line graph time series of daily sea surface temperature anomalies in the Nino3.4 region. Years are shown from 1982 to 2025 in shades of blue to light yellow, and 2026 is shown in red. Climatologically, the largest anomalies are during the boreal winter in terms of magnitude. Data is from OISSTv2.1. Map of July 14, 2026 average sea surface temperature anomalies in the ENSO monitoring regions. Data is from NOAA OISSTv2.1 with anomalies relative to a 1991-2020 baseline.Graphic showing the 1-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean. Data is from NOAA OISSTv2.1Graphic showing the 4-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean. Data is from NOAA OISSTv2.1.