For those of you unfamiliar with the names of the assorted islands and channels of the Canadian Arctic Archipelago here is a map that hopefully helps:
Plus another map detailing the routes through the Canadian Arctic Archipelago that have previously been successfully navigated by vessels large and small:
The sea ice in Lancaster Sound and the Amundsen Gulf is breaking up, and melt ponds are now visible on the fast ice across much of the southern route through the Canadian Arctic Archipelago:
“False colour” image of the Canadian Arctic Archipelago on June 17th from the MODIS instrument on the Terra satellite
The melt ponds previously visible in the Coronation Gulf now appear to have drained:
“False colour” image of the Canadian Arctic Archipelago on June 3rd from the MODIS instrument on the Aqua satellite
Looking at 2 dimensional data to begin with, CAA sea ice area is currently in the middle of the AMSR2 era pack:
To get a better feel for what might happen during the coming summer season here too is the state of play in the third dimension, courtesy of the Alfred Wegener Institute’s last combined thickness data of the winter from the Cryosat-2, Sentinel 3 and SMOS satellites:
Let’s also take a look at the Canadian Ice Service‘s sea ice “stage of development” charts. Here’s the most recent one for the “Western Arctic”, from June 15th:
There is no old ice anywhere on the southern route, so the stage seems set for the Northwest Passage to open relatively early this summer, with a final “choke point” in the Larsen Sound/Franklin Strait region.
Note that there is a potential fly in the NWP ointment, a recurrence of last year’s winds that blew old ice in the Beaufort Sea close to shore in the Amundsen Gulf during the first half of August!
It’s going to be more difficult to follow traffic on the Northern Sea Route this year, because the Russian authorities are no longer publishing daily position information for ships using the route.
However other sources revealed that things got underway early this year. On May 29th the nuclear icebreaker Ural led LNG tanker Christophe de Margerie through the Vilkitsky Strait into the Laptev Sea:
On June 5th the modest convoy is about to pass Wrangel Island into the Chukchi Sea:
Another nuclear powered icebreaker, Yakutiya, has also just made its way through the Vilkitsky Strait heading east:
If Yakutiya is leading a convoy of one or more other vessels through the pack ice in the Laptev Sea they have all got satellite AIS turned off!
[Update – June 8th]
Christophe de Margerie has passed through the Bering Strait, and thus completed the first west to east voyage through the Northern Sea Route this year. Ural has been left behind in the Chukchi Sea:
Yakutiya has travelled north of the New Siberian Islands and entered the East Siberian Sea:
[Update – June 15th]
Christophe de Margerie has just passed through the Bering Strait heading north on a return journey through the NSR. This time around Yakutiya is leading the way:
The JAXA/ViSHOP web site is currently undergoing maintenance, but here is how their 2 day average extent graph looked for June 2nd:
Extent was 3rd lowest in the JAXA record, behind 2016 and 2019.
The Alfred Wegener Institute’s sea ice concentration data shows that the Bering Sea is now largely free of sea ice, and the areas of open water in the Beaufort, Chukchi, East Siberian and Laptev Seas continue to expand:
The sea ice concentration map also shows open water in much of Lancaster Sound. Also apparent is the widespread presence of melt ponds along the southern part of the Canadian Arctic Archipelago. Here’s a closer, albeit somewhat cloudy, look:
“False colour” image of the Canadian Arctic Archipelago on June 3rd from the MODIS instrument on the Aqua satellite
JAXA have updated their visualisations of Arctic sea ice extent data. The “traditional” 2 day average graph is now labelled “preliminary”, and currently shows 2026 in a tie with 2020 for third lowest for the date:
5 day averaged “confirmed” data is also available, including regional graphs. By way of example here’s JAXA’s latest extent graph for the Bering Sea, dated May 15th:
The Alfred Wegener Institute’s sea ice concentration data reveals open water in the Beaufort, Chukchi, East Siberian and Laptev Seas:
In early April JAXA Arctic sea ice extent is 3rd lowest for the date, albeit in a “statistical tie” with last year:
The Alfred Wegener Institute’s regional extent graphs reveal an intriguing divergence on the Pacific periphery, where sea ice extent in the Sea of Okhotsk is at an all time low for the date in the AMSR2 record:
On the other hand extent in the Bering Sea is close to an all time high:
On the Atlantic periphery extent is less extreme, although there is currently open water north of Svalbard:
JAXA Arctic sea ice extent has just reached a new high for the year. At 13.76 million km² extent is currently 4th lowest for the date, just below last year’s maximum of 13.78 million km²:
JAXA extent is currently lowest for the date in their record going back to 1979. It’s highly likely that the metric peaked on March 7th which is a new record low maximum, albeit by a mere 20 thousand km²:
By way of a contrast, the National Snow and Ice Data Center’s 5 day averaged extent maximum of 14.29 million km² was reached on March 15th:
Here is the mid month update on the AWI’s CryoSat-2/Sentinel 3/SMOS Arctic sea ice thickness map:
Here too is the associated sea ice volume graph:
Next here are the ERA5 MSLP and 925 hPa air temperature anomaly maps for February 2026, now in “Greenland down” orientation to match the thickness maps:
together with the NSIDC monthly average extent graph for February:
Hudson Bay has fully frozen over during January. However, there is still open water north of Svalbard and in the North Water Polynya. It’s even possible to go swimming in the Nares Strait according to the latest AMSR2 concentration map from the Alfred Wegener Institute:
JAXA extent is currently 3rd lowest for the date, in a “statistical tie” with 2017:
Looking at the third dimension next, PIOMAS volume was second lowest for the date by a whisker at the end of January:
The Fifth US National Climate Assessment was published in November 2023 during the Biden/Harris administration. Here’s the announcement by Zeke Hausfather on X/Twitter:
After three years of work by a team of over 750 scientists, we are releasing the US 5th National Climate Assessment today!
We see greater impacts of climate change on the US since the 2018 NCA4 report, but also some encouraging signs of progress.https://t.co/2WZOLOXoKo
The Global Change Research Act of 1990 mandates that the US Global Change Research Program (USGCRP) deliver a report to Congress and the President not less frequently than every four years that “integrates, evaluates, and interprets the findings of the Program and discusses the scientific uncertainties associated with such findings; analyzes the effects of global change on the natural environment, agriculture, energy production and use, land and water resources, transportation, human health and welfare, human social systems, and biological diversity; and analyzes current trends in global change, both human-induced and natural, and projects major trends for the subsequent 25 to 100 years.”
You may well have noticed that Kamala Harris lost the subsequent election? Hence the Sixth US National Climate Assessment will be prepared during the term of the current Trump/Vance administration.
Regular readers will recognise some or all of those names, and it will not surprise you to learn that there was plenty of pushback from a wide range of climate scientists. In particular, the “Climate Experts’ Review of the DOE Climate Working Group Report“, led by Andrew Dessler and Robert Kopp was published at the end of September 2025. This report begins as follows:
The United States seeks an Arctic region that is peaceful, stable, prosperous, and cooperative. Climate change is making the Arctic more accessible than ever, threatening Arctic communities and vital ecosystems, creating new potential economic opportunities. and intensifying competition to shape the region’s future. Russia has invested significantly in its presence in the Arctic over the last decade, modernizing its military infrastructure and increasing the pace of exercises and training operations. Its aggressive behavior has raised geopolitical tensions in the Arctic, creating new risks of unintended conflict and hindering cooperation. The PRC has also sought to increase its influence in the Arctic by rapidly increased its Arctic investments, pursuing new scientific activities, and using these scientific engagements to conduct dual-use research with intelligence or military applications.
The Nagurskoye military base on on Aleksandra Island in Franz Josef Land. Image via the Barents Observer
We will uphold U.S. security in the region by improving our maritime domain awareness, communications, disaster response capabilities, and icebreaking capacity to prepare for increased international activity in the region. We will exercise U.S. Government presence in the region as required, while reducing risk and preventing unnecessary escalation. Arctic nations have the primary responsibility for addressing regional challenges, and we will deepen our cooperation with our Arctic allies and partners and work with them to sustain the Arctic Council and other Arctic institutions despite the challenges to Arctic cooperation posed by Russia’s war in Ukraine. We will continue to protect freedom of navigation and determine the U.S. extended continental shelf in accordance with international rules. We must build resilience to and mitigate climate change in the region, including through agreements to reduce emissions and more cross-Arctic research collaboration. As economic activity in the Arctic increases, we will invest in infrastructure, improve livelihoods, and encourage responsible private sector investment by the United States, our allies, and our partners, including in critical minerals, and improve investment screening for national security purposes. Across these efforts, we will uphold our commitment to honor Tribal sovereignty and self-governance through regular, meaningful, and robust consultation and collaboration with Alaska Native communities.
By way of contrast the Trump Administration’s document makes no mention of the Arctic or Alaska or even Greenland. It does, however state that:
After years of neglect, the United States will reassert and enforce the Monroe Doctrine to restore American preeminence in the Western Hemisphere, and to protect our homeland and our access to key geographies throughout the region. We will deny non-Hemispheric competitors the ability to position forces or other threatening capabilities, or to own or control strategically vital assets, in our Hemisphere. This “Trump Corollary” to the Monroe Doctrine is a common-sense and potent restoration of American power and priorities, consistent with American security interests.
Specifically regarding Europe the 2025 Security Strategy has this to say:
Continental Europe has been losing share of global GDP—down from 25 percent in 1990 to 14 percent today—partly owing to national and transnational regulations that undermine creativity and industriousness.
But this economic decline is eclipsed by the real and more stark prospect of civilizational erasure. The larger issues facing Europe include activities of the European Union and other transnational bodies that undermine political liberty and sovereignty, migration policies that are transforming the continent and creating strife, censorship of free speech and suppression of political opposition, cratering birthrates, and loss of national identities and self-confidence. Should present trends continue, the continent will be unrecognizable in 20 years or less. As such, it is far from obvious whether certain European countries will have economies and militaries strong enough to remain reliable allies. Many of these nations are currently doubling down on their present path. We want Europe to remain European, to regain its civilizational self-confidence, and to abandon its failed focus on regulatory suffocation.
At this juncture Russia does at last receive a mention:
This lack of self-confidence is most evident in Europe’s relationship with Russia. European allies enjoy a significant hard power advantage over Russia by almost every measure, save nuclear weapons. As a result of Russia’s war in Ukraine, European relations with Russia are now deeply attenuated, and many Europeans regard Russia as an existential threat. Managing European relations with Russia will require significant U.S. diplomatic engagement, both to reestablish conditions of strategic stability across the Eurasian landmass, and to mitigate the risk of conflict between Russia and European states.
There is no mention of any risk of conflict between Russia and the United States, in the Arctic or anywhere else on Planet Earth.
The whole document is worth a long look, but here is a brief extract:
Russia has a larger Arctic military presence and ice-breaking capability than other Arctic states, and has embarked on a substantial rebuilding of Soviet-era military infrastructure in the region. Nevertheless, Russian influence efforts seek to depict US and NATO activity in the Arctic as provocative and destabilizing, in contrast with casting Russia’s military presence as routine and defensive. For example, since 2024, state media has covered NATO “flexing its muscles” with exercises in Finland on “Russia’s Arctic doorstep” and featured Kremlin officials’ promises to protect Russia’s Arctic interests from “NATO’s expansionist ambitions,” while a known proxy site warned of “steps towards the Arctic war.” These narratives have found renewed salience since 2025 amid public calls from US President Trump for Greenland to join the United States.
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