Tag Archives: Chukchi Sea

The Northern Sea Route in 2026

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:

[Update – June 22nd]

Yakutiya and Christophe de Margerie have just passed through the Vilkitsky Strait heading west:

The skies were fairly clear over the central Northern Sea Route this morning, revealing the fast ice breaking up in the East Siberian Sea and plenty of melt ponds in the Laptev Sea:

“False colour” image of the Laptev and East Siberian Seas on June 22nd from the MODIS instrument on the Terra satellite

Watch this space!

Facts About the Arctic in May 2026

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:

Continue reading Facts About the Arctic in May 2026

Facts About the Arctic in July 2025

At the beginning of July JAXA/ViSHOP Arctic sea ice extent is still “lowest for the date” in their record going back to 1979:

The PIOMAS sea ice thickness map for June 30th reveals that the previously thick ice in the Chukchi Sea has been noticeably thinning:

The associated volume graph shows that the 2025 curve has entered the pack of other recent years. and is now 4th lowest for the date:

Continue reading Facts About the Arctic in July 2025

Facts About the Arctic in June 2025

I’ve been away on a “road trip” during the first part of June, so this month’s initial update is a trifle tardy.

After a 100k “break” yesterday JAXA/ViSHOP extent is currently in a tie with 2024 for 4th lowest for the date, and still slightly below 2012.

The PIOMAS sea ice thickness map for May 31st continues to show plenty of thick ice in the Beaufort and Chukchi Seas:

However, the associated volume graph shows the 2025 curve only slightly above the previous low for the date in 2017:

I have recently received a disturbing email from the NSIDC, which reads as follows:

Continue reading Facts About the Arctic in June 2025

Facts About the Arctic in April 2025

JAXA/ViSHOP extent finished the month of March “lowest for the date” once again:

However, since then the graph has been “flatlining” and extent is now above 2019 and rapidly approaching the rest of the recent pack.

At the end of March PIOMAS Arctic sea ice volume had increased to 21.21 thousand km³, still 2nd lowest for the date in the PIOMAS record:

Here is the corresponding PIOMAS sea ice thickness map for March 31st 2025:

For comparison purposes, here is the “near real time” CryoSat-2/SMOS merged thickness data from the Alfred Wegener Institute: 

Continue reading Facts About the Arctic in April 2025

Facts About the Arctic in October 2024

The JAXA extent graph is currently not updating, so let’s begin this month with the latest AMSR2 sea ice concentration map from the Alfred Wegener Institute. Click the image to see a ~10 Mb animation of the last four weeks:

Note in particular the restart of export into the East Greenland Sea via the Fram Strait:

and the movement of ice within the Canadian Arctic Archipelago:

The PIOMAS gridded thickness data for September 2024 has been released:

Continue reading Facts About the Arctic in October 2024

Facts About the Arctic in May 2024

Since a certain “sceptic” has recently been comparing 2024 sea ice extent to “20 years ago”, here’s the current JAXA/ViSHOP extent graph of selected years, including 2004:

The CryoSat-2/SMOS merged Arctic sea ice volume graph finishes on April 15th, but older data is being reanalysed and here is the latest version:

The gap in the near real time data due to the problem with the SMOS satellite during the first half of March has been filled in, but the result doesn’t look very convincing to say the least!

The PIOMAS gridded thickness data for April 2024 is now available. Here’s the end of month volume graph:

Continue reading Facts About the Arctic in May 2024

Facts About the Arctic in May 2023

At the beginning of May AWI’s high resolution AMSR2 extent metric is at the top of the historical range:

After a period of melt in the East Greenland Sea, export of sea ice from the Central Arctic via the Fram Strait has increased recently:

Sea ice area in the Barents Sea peaked in the first week of April and has declined steadily since then:

SMOS data is flowing again, and the gaps have been filled. Here’s the final pre melt ponding map of the spring:

It reveals large areas of thin ice that have recently developed in the Kara Sea. Here’s a pseudo colour glimpse of the region through the clouds:

Continue reading Facts About the Arctic in May 2023

Facts About the Arctic in November 2022

A change is allegedly as good as a rest, so here’s an alternative view of high resolution AMSR2 area and extent created using the experimental tools provided by the AWI’s Lars Kaleschke at: https://sites.google.com/view/sea-ice/

After a brief pause mid-month the refreeze has accelerated again. Both metrics are in the upper half of the decadal range, with extent this year just above 2021 and area just below last year.

Next let’s take a look at sea ice concentration at the end of October:

Continue reading Facts About the Arctic in November 2022

Facts About the Arctic in September 2022

As in previous years there is already a thread devoted to this year’s minimum extent. By way of a summary here are the end of August numbers for our favourite “high resolution” AMSR2 area and extent metrics:

Extent is currently near the top of the range of the last 10 years.

We have now reached the stage of the “melting season” when “refreezing” has started in the Central Arctic but melting at the periphery is outpacing it. However the Canadian Ice Service stage of development charts now show the arrival of new ice in the high latitudes of the Canadian Arctic Archipelago:

Continue reading Facts About the Arctic in September 2022