Here is our mid February update on Arctic sea ice thickness and volume, based on the Alfred Wegener Institute’s merged CryoSat-2/Sentinel 3/SMOS gridded sea ice thickness data: greatwhitecon.info/2026/02/fact... 1/

"Thousands of federal data sets have vanished without warning, including many key to climate research. One day last May, @noaa.gov announced that the Sea Ice Index, a nearly half-century-long archive kept by one of its centers, would no longer be maintained or updated." 👇 #SeaIce

“A complete total assault on all our environmental progress.” At the Munich Security Conference, California Governor Gavin Newsom @governor.ca.gov did not hold back when speaking to #WeDontHaveTime about Donald Trump’s latest attack on science. Share this interview if you agree.

ERA5 data for January 2026 has still not made it over to @noaa.gov's "Web-based Reanalyses Intercomparison Tools". Rather belatedly here is our @nsidc.bsky.social #Arctic sea ice news replacement service, reverting to the NCEP/NCAR R1 reanalysis: greatwhitecon.info/2026/02/fact...

Thanks Jake. "Returning the Rule of Law to EPA Regulations. Creating Policy Rooted in Reality! Restoring the American Dream!! Prioritizing Consumer Choice!!!" "Major Supreme Court decisions in the intervening years... have significantly clarified the scope of EPA’s authority under the CAA" 1/

Who is suing to protect the Endangerment Finding? Cause I've still got 2026 money to donate.

📣 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/...

Two different varieties of Arctic sea ice thickness, and hence volume, at the end of January 2026. Compare and contrast the PIOMAS "model" versus satellite "measurements": greatwhitecon.info/2026/02/fact...

Here's the latest instalment in the #Climategate3 scandal 👇 www.edf.org/media/newly-... "The records reveal brazenly unlawful actions behind the creation of a report that underlies the administration’s attack on the Endangerment Finding – including evidence of at least 18 meetings held in secret."

Speaking of NCA6, See also: bsky.app/profile/jim-...

A very interesting addendum to my article on the evisceration of NCAR and the (potential!) MAGA flavoured Sixth US National Climate Assessment 👇 greatwhitecon.info/2026/01/the-...

This is the most astonishing graph of what the Trump regime has done to US science. They have destroyed the federal science workforce across the board. The negative impacts on Americans will be felt for generations, and the US might never be the same again. www.nature.com/immersive/d4...

A pretty unambiguous top line judgement in the UK's "National security assessment on global ecosystems" report, released today: "Global ecosystem degradation and collapse threaten UK national security and prosperity" Confidence: high. Time to speed up action, then? www.gov.uk/government/p...

Fairly exciting weather today, hurricane force winds + blizzard. The neighbours* have been on the radio offering an Antarctic film festival this evening if we can get out the door.. * Finland. The Finnish station Aboa is about a hundred metres away on the same nunatak as Wasa #iQ2300 #Antarctica

"Ooh, let the drums mark this day" youtu.be/hS0wFiWpU4U #Greenland

"Ooh, let the drums mark this day" youtu.be/hS0wFiWpU4U #Greenland

Copenhagen town hall square, Denmark right now. Massive solidarity with Greenland demonstrations. Source: dr.dk

Maritime identity fraud in the Arctic: An oil tanker with false IMO number is on the way along the Norwegian coast en route to Murmansk www.thebarentsobserver.com/news/tanker-...

Yes - see: www.eenews.net/articles/its...

My article on the (potential!) 6th edition of the US National Climate Assessment 👇 greatwhitecon.info/2026/01/the-... "It is already clear that @katharinehayhoe.com, @hausfath.bsky.social and the other scientists who produced #NCA5 will not be invited by the Trump administration to write #NCA6"

My Arctic alter ego has been experimenting with deepfake images of fantasy emperors: bsky.app/profile/grea... Would you like to see the "undressed" version @alastaircampbell2.bsky.social?

New preprint: Ludwig, V.,et al.: Biases, Uncertainties, and Trends in Arctic Sea-Ice Thickness: A Cross-Product Analysis from 1995 to 2023, EGUsphere [preprint], doi.org/10.5194/egus..., 2026.

The Democrats have made their next move in the ongoing 19 dimensional chess game over #Greenland greatwhitecon.info/2025/12/the-... In response to Rep. Fine’s opening gambit, Congressman @gomez.house.gov (CA-34) announced today that he had "Introduced the Greenland Sovereignty Protection Act" 1/n

Here's the latest move in the Trump administration's game of 19 dimensional chess, with #Greenland the prize to be awarded to the winner: greatwhitecon.info/2025/12/the-... "Congressman Randy Fine (FL-06) introduced the Greenland Annexation and Statehood Act..." 1/n

NEW: I obtained internal emails from the Department of Energy's climate working group. They show the group plotting to produce a second misleading climate report, DOE officials avoiding public disclosure laws, DOE peer reviewers stating they weren't qualified: www.eenews.net/articles/doe...

Due to Trump administration funding cuts @nsidc.bsky.social is no longer providing this sort of information on a monthly basis. Hence here are the ERA5 MSLP and 925 hPa air temperature anomaly maps of the #Arctic for December 2025: greatwhitecon.info/2026/-01/fac...

Since AI imagery is in the news at the moment, here's one I prepared earlier, with the assistance of ImageFX rather than #Grok

Here's my review of the recently published "US National Security Strategy" greatwhitecon.info/2025/12/the-... "The Trump Administration’s document makes no mention of the #Arctic or #Alaska or even #Greenland... There is no mention of any risk of conflict between #Russia and the United States"

Whichever way you look at it, PIOMAS modelled #Arctic sea ice volume is currently the lowest it has ever been for the time of year since satellite coverage began in 1979. Here's plots of the daily, monthly and annual data 👇 greatwhitecon.info/2026/01/fact...

Arctic Sea Ice Minimum Volumes 1979-2025 youtu.be/8lYQnxGharo?... #Arctic sea ice volume for Sept 2025 in 2nd lowest place ever with 3,874 km³. That's a *quarter* of what it was just 40 years ago at 16,855 km³. (Now in 4k 60fps!) #ClimateChange #ClimateCrisis #dataviz

The Trump White House’s [lack of] National Security Strategy in the Arctic: greatwhitecon.info/2025/12/the-... "It makes no mention of the #Arctic or Alaska or even Greenland... Or of any risk of conflict between Russia and the United States, in the Arctic or anywhere else on Planet Earth."

UK Briefing on Climate and National Security thinc.blog/2025/12/08/u...

Here's an extract from Lieutenant General (Ret’d) Richard Nugee's presentation at the recent UK #NationalEmergencyBriefing: greatwhitecon.info/2025/12/the-... "The Russian Duma has claimed [the Arctic Ocean] is a Russian internal sea, whereas we treat the #Arctic as international waters." 1/n

At the end of November JAXA #Arctic sea ice extent and PIOMAS volume were both lowest for the time of year since satellite measurements began: greatwhitecon.info/2025/12/fact... Extent was 9.27 million km², and volume 9.20 thousand km³.

Here's a map of #Arctic sea ice thickness at the end of October: greatwhitecon.info/2025/11/fact... It's based on data from the CryoSat-2, Sentinel 3 and SMOS satellites.

FYI @thedisproof.bsky.social 👇 bsky.app/profile/grea...

Prompted by a regular reader, I've been experimenting with trying to persuade an LLM to accurately answer some scientific questions about #Arctic sea ice: greatwhitecon.info/2025/11/grok... Preliminary results obtained using xAI via Grok provide compelling empirical proof of Brandolini's Law:

Great to get the latest news about the AMSR3 instrument on the recently launched GOSAT-GW #satellite 🛰️, during the JAXA PI meeting last week in #Tokyo. First data was shown and is looking great! 🥳 We are looking forward to make use of the new 183 GHz channels.

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...

Let the science begin! Spring has sprung in Antarctica, our aircraft have landed, and #RRSSirDavidAttenborough leaves the UK tomorrow. This season our teams will deliver more than 60 science projects at research stations, on the ship, and in remote deep field and marine locations. 🧵 1/4

The Arctic Ocean acts to stabilize the AMOC New paper in #ScienceAdvances by researchers from @bjerknes.uib.no and @oxuniearthsci.bsky.social showing how ongoing Atlantification and sea ice loss leads to a strengthening of the Arctic overturning circulation. www.science.org/doi/10.1126/...

Our partner @fondationtaraocean.bsky.social has sent its unique and amazing Tara Polar Station to Svalbard, not only to start its ice trials but also to start its important scientific work. One of the projects is introduced here exclusively. #science #Arctic polarjournal.net/the-tara-pol...

A largely cloud free satellite image of the central Northwest Passage shows that the prior melt ponds along the southern route have drained, and that melt ponds have now formed on the northern route through McClure Strait: greatwhitecon.info/2025/05/the-... #Arctic #SeaIce #NWP

June 21 is #showyourstripes day and we encourage everybody to join and start conversations about climate risks and solutions with the help of the icon graphic created by @edhawkins.org in 2018, inspired by a blanket crocheted by @elliehighwood.bsky.social skepticalscience.com/show-your-st...

JAXA/ViSHOP #Arctic #SeaIce extent is now "lowest for the date" in their record going back to 1979: greatwhitecon.info/2025/06/fact...

Sorry for the short notice, but I've only just discovered the existence of this interesting event: 👇

It looks as though there will be an early start to the Northwest Passage sailing season this year: greatwhitecon.info/2025/05/the-... "The #SeaIce in Lancaster Sound and Prince Regent Inlet is breaking up, Bellot Strait is mostly open water, and surface melt has begun across Larsen Sound"

In an hour or two's time Ella Hibbert is due to begin a single handed circumnavigation of the #Arctic in her yacht Yeva, starting in southern England. Much more on the condition of the sea ice in the Northwest Passage and on Yeva's voyage here: greatwhitecon.info/2025/05/the-... #EllaInTheArctic

As violent tornadoes tear across eastern Kentucky tonight, remember that because of DOGE initiated budget cuts, the Jackson, KY NWS office is forced to close at times (in quieter weather). That this is even something they need to worry about is an *utter disgrace.*

Hopefully some of the folks from the @nsidc.bsky.social will be speaking on the #WeatherAndClimateLivestream too 👇