July was once again dominated by low pressure and anomalously low temperatures over the central Arctic:
As a consequence the NSIDC monthly average extent for July was 6th lowest in their record going back to 1979:
August began with low pressure still dominant. According to the Canadian Meteorological Centre yet another cyclone bottomed out with a mean sea level pressure of 973 hPa on the 4th:
The continuing cyclonic activity has dispersed the sea ice, and JAXA extent is currently 12th lowest in their record:
The other side of the same coin is that reduced sea ice concentration is now apparent across large areas of the Central Arctic Basin:
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
[Update – June 30th]
Christophe de Margerie is back in the Laptev Sea heading east, this time accompanied by Boris Davydov, another LNG tanker. The nuclear icebreakers are all in the Kara Sea, on the other side of the Vilkitsky Strait:
[Update – August 27th]
In a highly unusual occurrence, two “Capesize” bulk carriers are en route to the far east via the Northern Sea Route. Deyi Confidence and Deyi Excellence have entered the Laptev Sea by sailing around the north of Severnaya Zemlya rather than using the usual route via the Vilkitsky Strait:
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:
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:
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:
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:
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