The previous post below sounded the alarm about ice halting Arctic shipping early.  October 14, the two Northern Sea Route choke points are in place:  Chukchi (bottom left) blocking entrance to Bering sea, and Laptev (upper left) stopping traffic to European seas. By yesterday  Laptev and East Siberian seas are completely covered, each over 95% of last March max extents. Chukchi is at 50% with its coastline covered. Kara (top left) is also adding ice rapidly. Less obviously Canadian Archipelago (lower center) doubled in 10 days up to 300k km2.

The graph below shows October ice extents on average and for some notable years.

The October gain in ice extents averages ~3.5M km2 up to 8.6M km2.  It is the month adding the most ice each year.  2024 has recovered more slowly than usual or than 2023, tracking along with 2007. The re-freezing has accelerated in the last 10 days.

Ice-strengthened supramax Kumpula (Arc 4) on the NSR being escorted by nuclear icebreaker Vaygach. (Source: Courtesy of ESL Shipping)

The report comes from Malte Humpert at gCaptain  Early Winter Ice Halts Arctic Shipping Traffic Weeks Ahead of Schedule.  Excerpts in italics with my bolds.

The summer shipping window on Russia’s Northern Sea Route is coming to a rapid close weeks ahead of schedule. A number of vessels and convoys are rushing to complete their transits before the route shuts down in the next three weeks.

Source: Northern Sea Route Information Office

Unlike the last couple of summers when Russia’s Arctic coastal waterways were fully clear of sea ice, residual winter ice persisted in the eastern section this year. This has resulted in the early onset of ice formation especially in the Laptev, East Siberian, and Chukchi Seas.

NSRIO: Ice is still present in the eastern sector of the NSR preventing free passage of ships without ice class. The nuclear icebreaker Sibir has been operating in the East Siberian and Chukchi Seas since the end of June together with the nuclear icebreaker Vaygach, which has been in the area since mid-July. In several areas of the Chukchi and East Siberian Seas heavy ice conditions are still observed, which directly affects the admission of low ice class vessels to these areas. The western part of the NSR is mostly ice-free. Above is a map of ice conditions as of August 7, 2024.

Russia’s Northern Sea Route Administration announced that vessels with no ice class will have to vacate the waterway by October 15, around 2-3 weeks ahead of schedule. For vessels with light and medium ice classifications the navigation season will end on October 20 and October 31 respectively.

The last permitted start of convoys heading east will be October 10, leaving just one more week for vessels to begin their Arctic transit.

This year’s early shutdown comes three years after narrowly avoiding a major incident three years ago. In October 2021 Russian authorities reacted too late to begin closing down the NSR as winter sea ice drifted into the main shipping channel and trapped two dozen vessels for more than a month. A 30 centimeter or one foot thick ice layer had formed by the end of October across hundreds of miles of Arctic Ocean.
 
Several icebreakers, including the powerful nuclear vessel Yamal, rushed to the scene from Murmansk over 3,000 nautical miles away to help free the stranded vessels. Over the course of more than 6 weeks several icebreakers worked to break the vessels free and escort them to safety out of the eastern section of the Northern Sea Route. The situation did not fully resolve until the end of December when the last vessels were freed.

Vessels stuck in thick winter sea ice in November 2021 awaiting rescue. (Source: Rosatomflot)

Currently a number of container ships, oil tankers, bulk carriers
and LNG tankers are passing through the route.

In the Far East two LNG carriers and two oil tankers, including the Suezmax tanker Sai Baba, are currently passing through the waters adjacent to the Bering Strait. They are staying clear of multi-year ice around Wrangel Island which has persisted and troubled shipping all summer. A nuclear icebreaker had remained on standby for much of the summer keeping the shipping lane open.

Select container ships, crude oil tankers, and bulk and LNG carriers currently on the NSR. (Source: Shipatlas)

Further west along the route, the first-ever conventional Panamax container ship in the Arctic is about halfway through its transit. The vessel had originally intended to also conduct its return voyage via the Arctic, but will now likely have to return to Asia via the Suez Canal or South Africa route.

A massive Capesize bulk carrier without any ice class, Dodo, is also rushing to complete its eastbound voyage to Caofeidian, China.

The previous post below sounded the alarm about ice halting Arctic shipping early.  Now the two choke points are blocked nine days later. Chukchi sea (left) is blocking entrance to Bering sea.  Laptev (right) is blocking traffic into European Barents and Kara seas.

Ice-strengthened supramax Kumpula (Arc 4) on the NSR being escorted by nuclear icebreaker Vaygach. (Source: Courtesy of ESL Shipping)

The report comes from Malte Humpert at gCaptain  Early Winter Ice Halts Arctic Shipping Traffic Weeks Ahead of Schedule.  Excerpts in italics with my bolds.

The summer shipping window on Russia’s Northern Sea Route is coming to a rapid close weeks ahead of schedule. A number of vessels and convoys are rushing to complete their transits before the route shuts down in the next three weeks.

Source: Northern Sea Route Information Office

Unlike the last couple of summers when Russia’s Arctic coastal waterways were fully clear of sea ice, residual winter ice persisted in the eastern section this year. This has resulted in the early onset of ice formation especially in the Laptev, East Siberian, and Chukchi Seas.

NSRIO: Ice is still present in the eastern sector of the NSR preventing free passage of ships without ice class. The nuclear icebreaker Sibir has been operating in the East Siberian and Chukchi Seas since the end of June together with the nuclear icebreaker Vaygach, which has been in the area since mid-July. In several areas of the Chukchi and East Siberian Seas heavy ice conditions are still observed, which directly affects the admission of low ice class vessels to these areas. The western part of the NSR is mostly ice-free. Above is a map of ice conditions as of August 7, 2024.

Russia’s Northern Sea Route Administration announced that vessels with no ice class will have to vacate the waterway by October 15, around 2-3 weeks ahead of schedule. For vessels with light and medium ice classifications the navigation season will end on October 20 and October 31 respectively.

The last permitted start of convoys heading east will be October 10, leaving just one more week for vessels to begin their Arctic transit.

This year’s early shutdown comes three years after narrowly avoiding a major incident three years ago. In October 2021 Russian authorities reacted too late to begin closing down the NSR as winter sea ice drifted into the main shipping channel and trapped two dozen vessels for more than a month. A 30 centimeter or one foot thick ice layer had formed by the end of October across hundreds of miles of Arctic Ocean.
 
Several icebreakers, including the powerful nuclear vessel Yamal, rushed to the scene from Murmansk over 3,000 nautical miles away to help free the stranded vessels. Over the course of more than 6 weeks several icebreakers worked to break the vessels free and escort them to safety out of the eastern section of the Northern Sea Route. The situation did not fully resolve until the end of December when the last vessels were freed.

Vessels stuck in thick winter sea ice in November 2021 awaiting rescue. (Source: Rosatomflot)

Currently a number of container ships, oil tankers, bulk carriers
and LNG tankers are passing through the route.

In the Far East two LNG carriers and two oil tankers, including the Suezmax tanker Sai Baba, are currently passing through the waters adjacent to the Bering Strait. They are staying clear of multi-year ice around Wrangel Island which has persisted and troubled shipping all summer. A nuclear icebreaker had remained on standby for much of the summer keeping the shipping lane open.

Select container ships, crude oil tankers, and bulk and LNG carriers currently on the NSR. (Source: Shipatlas)

Further west along the route, the first-ever conventional Panamax container ship in the Arctic is about halfway through its transit. The vessel had originally intended to also conduct its return voyage via the Arctic, but will now likely have to return to Asia via the Suez Canal or South Africa route.

A massive Capesize bulk carrier without any ice class, Dodo, is also rushing to complete its eastbound voyage to Caofeidian, China.

Here’s ice activity in last week in the NSR from Chukchi Sea in the east (left side), and threatening in Laptev Sea (right).

Ice-strengthened supramax Kumpula (Arc 4) on the NSR being escorted by nuclear icebreaker Vaygach. (Source: Courtesy of ESL Shipping)

The report comes from Malte Humpert at gCaptain  Early Winter Ice Halts Arctic Shipping Traffic Weeks Ahead of Schedule.  Excerpts in italics with my bolds.

The summer shipping window on Russia’s Northern Sea Route is coming to a rapid close weeks ahead of schedule. A number of vessels and convoys are rushing to complete their transits before the route shuts down in the next three weeks.

Source: Northern Sea Route Information Office

Unlike the last couple of summers when Russia’s Arctic coastal waterways were fully clear of sea ice, residual winter ice persisted in the eastern section this year. This has resulted in the early onset of ice formation especially in the Laptev, East Siberian, and Chukchi Seas.

NSRIO: Ice is still present in the eastern sector of the NSR preventing free passage of ships without ice class. The nuclear icebreaker Sibir has been operating in the East Siberian and Chukchi Seas since the end of June together with the nuclear icebreaker Vaygach, which has been in the area since mid-July. In several areas of the Chukchi and East Siberian Seas heavy ice conditions are still observed, which directly affects the admission of low ice class vessels to these areas. The western part of the NSR is mostly ice-free. Above is a map of ice conditions as of August 7, 2024.

Russia’s Northern Sea Route Administration announced that vessels with no ice class will have to vacate the waterway by October 15, around 2-3 weeks ahead of schedule. For vessels with light and medium ice classifications the navigation season will end on October 20 and October 31 respectively.

The last permitted start of convoys heading east will be October 10, leaving just one more week for vessels to begin their Arctic transit.

This year’s early shutdown comes three years after narrowly avoiding a major incident three years ago. In October 2021 Russian authorities reacted too late to begin closing down the NSR as winter sea ice drifted into the main shipping channel and trapped two dozen vessels for more than a month. A 30 centimeter or one foot thick ice layer had formed by the end of October across hundreds of miles of Arctic Ocean.
 
Several icebreakers, including the powerful nuclear vessel Yamal, rushed to the scene from Murmansk over 3,000 nautical miles away to help free the stranded vessels. Over the course of more than 6 weeks several icebreakers worked to break the vessels free and escort them to safety out of the eastern section of the Northern Sea Route. The situation did not fully resolve until the end of December when the last vessels were freed.

Vessels stuck in thick winter sea ice in November 2021 awaiting rescue. (Source: Rosatomflot)

Currently a number of container ships, oil tankers, bulk carriers
and LNG tankers are passing through the route.

In the Far East two LNG carriers and two oil tankers, including the Suezmax tanker Sai Baba, are currently passing through the waters adjacent to the Bering Strait. They are staying clear of multi-year ice around Wrangel Island which has persisted and troubled shipping all summer. A nuclear icebreaker had remained on standby for much of the summer keeping the shipping lane open.

Select container ships, crude oil tankers, and bulk and LNG carriers currently on the NSR. (Source: Shipatlas)

Further west along the route, the first-ever conventional Panamax container ship in the Arctic is about halfway through its transit. The vessel had originally intended to also conduct its return voyage via the Arctic, but will now likely have to return to Asia via the Suez Canal or South Africa route.

A massive Capesize bulk carrier without any ice class, Dodo, is also rushing to complete its eastbound voyage to Caofeidian, China.

Here’s ice activity in last week in the NSR from Chukchi Sea in the east (left side), and threatening in Laptev Sea (right).

The annual competition between ice and water in the Arctic ocean has reached the maximum for water, which typically occurs mid September.  After that, diminishing energy from the slowly setting sun allows oceanic cooling causing ice to regenerate. Those interested in the dynamics of Arctic sea ice can read numerous posts here.  This post provides a look at mid September from 2007 to yesterday as a context for understanding this year’s annual minimum.

The image above shows Arctic ice extents on day 260 (lowest annual daily extent on average) from 2007 to 2024 yesterday.  Obviously, the regions vary as locations for ice, discussed in more detail later on. The animation shows the ice deficits in years 2007, 2012, 2016, and 2020, as well as surplus years like 2010, 2014, 2022 and 2024.

Note that for climate purposes the annual minimum is measured by the September monthly average ice extent, since the daily extents vary and will go briefly lowest on or about day 260. In a typical year the overall ice extent will end September slightly higher than at the beginning.  2024 September ice extent averaged 4.6M over the first 16 days, and is likely to end the month with at least that amount for the entire month. For comparison, the 17 year average for Sept. 1-16 is 4.7M.

The melting season to mid September shows 2024 tracked lower than average but ended the period slightly above.

The graph above shows September daily ice extents for 2024 compared to 18 year averages, and some years of note. Day 260 has been the lowest daily ice extent on average for the last 18 years.

The black line shows on average Arctic ice extents during September decline 358k km2 down to 4.5M Km2 by day 260. The average increase from now on is 490k km2 up to 5.0M km2 end of September.  2024  tracked a little lower than the 18-year average in the second week reaching a low of 4.49M km2 on day 255, before going above average on day 260.

SII was reporting deficits as high as 0.5M km2 (half a Wadham) compared to  MASIE early in September.  For some reason, apparently data access issues, that dataset has not been updated for the last five days.  2023 bottomed out at 4.1M while 2007 daily minimum hit 4.0M, ended ~ 0.5M km2 in deficit to average and 535k km2 less than MASIE on day 260.  2020 ice on day 260 was ~740k km2 in deficit to average.

The main deficit to average is in CAA with a smaller loss in Chukchi, overcome by surpluses almost everywhere, especially in Central Arctic along with Laptev and Greenland seas. And as discussed below, the marginal basins have little ice left to lose.

The Bigger Picture 

We are close to the annual Arctic ice extent minimum, which typically occurs on or about day 260 (mid September). Some take any year’s slightly lower minimum as proof that Arctic ice is dying, but the image above shows the Arctic heart is beating clear and strong.

Over this decade, the Arctic ice minimum has not declined, but since 2007 looks like fluctuations around a plateau. By mid-September, all the peripheral seas have turned to water, and the residual ice shows up in a few places. The table below indicates where we can expect to find ice this September. Numbers are area units of Mkm2 (millions of square kilometers).

The table includes some early years of note along with the last 4 years compared to the 17 year average for five contiguous arctic regions. BCE (Beaufort, Chukchi and East Siberian) on the Asian side are quite variable as the largest source of ice other than the Central Arctic itself.   Greenland Sea and CAA (Canadian Arctic Archipelago) together hold almost 0.5M km2 of ice at annual minimum, fairly consistently.  LKB are the European seas of Laptev, Kara and Barents, a smaller source of ice, but a difference maker some years, as Laptev was in 2016 and 2023.  Baffin and Hudson Bays are inconsequential as of day 260.

2024 extent of 4.58 is 1.3% over average, mainly due to surpluses in Chukchi and East Siberian seas.

For context, note that the average maximum has been 15M, so on average the extent shrinks to 30% of the March high (31% in 2022) before growing back the following winter.  In this context, it is foolhardy to project any summer minimum forward to proclaim the end of Arctic ice.

Resources:  Climate Compilation II Arctic Sea Ice

Figure 1. Distribution of SIO contributors for August estimates of September 2024 pan-Arctic sea-ice extent. No Heuristic methods were submitted in August. “Sun” is a public/citizen contribution. Image courtesy of Matthew Fisher, NSIDC.

2024: August Report from Sea Ice Prediction Network

The August 2024 Outlook received 24 pan-Arctic contributions (Figure 1). This year’s median
forecasted value for pan-Arctic September sea-ice extent is 4.27 million square kilometers with
an interquartile range of 4.11 to 4.54 million square kilometers. This is lower than the 2022 (4.83
million square kilometers) and 2023 (4.60 million square kilometers) August median forecasts
for September. . .This reflects relatively rapid ice loss during the month of July, resulting in August
Outlooks revising estimates downward. The lowest sea-ice extent forecast is 3.71 million square
kilometers, from the RASM@NPS submission); the highest sea-ice extent forecast is 5.23
million square kilometers, submitted by BCCR.

These are predictions for the September 2024 monthly average ice extent as reported by NOAA Sea Ice Index (SII). This post provides a look at the 2024 Year To Date (YTD) based on monthly averages comparing MASIE and SII datasets. (18 year average is 2006 to 2023 inclusive).

The graph puts 2024 into recent historical perspective. Note how 2024 was slightly above the 18-year average for the first 5 months, then tracked slightly lower to average through August. The outlier 2012 provided the highest March maximum as well as the lowest September minimum, coinciding with the Great Arctic Cyclone that year.  2007 began the period with the lowest minimum except for 2012.  SII 2024 started slightly higher than MASIE the first 3 months, then ran the same as MASIE until dropping in August 400k km2 below MASIE 2024 and also lower than 2007 and 2012.

The table below provides the monthly Arctic ice extent averages for comparisons (all are M km2)

The first two data columns are the 2024 YTD shown by MASIE and SII, with the MASIE surpluses in column three.  Column four shows MASIE 2024 compared to MASIE 18 year averages, while column five shows SII 2024 compared to SII 18 year averages.  YTD August MASIE and SII are below their averages, SII by nearly half a Wadham. The last column shows MASIE 2024 holding surpluses over 2007 most of the months, and nearly the same in August.

Summary

The experts involved in SIPN are expecting SII 2024 September to be much lower than 2023 and 2022, based largely on the large deficits SII is showing in July and August. The way MASIE is going, this September looks to be lower than its average, but much higher than SII.  While the daily minimum for the year occurs mid September, ice extent on September 30 is typically slightly higher than on September 1.

Footnote:

Some people unhappy with the higher amounts of ice extent shown by MASIE continue to claim that Sea Ice Index is the only dataset that can be used. This is false in fact and in logic. Why should anyone accept that the highest quality picture of ice day to day has no shelf life, that one year’s charts can not be compared with another year? Researchers do this, including Walt Meier in charge of Sea Ice Index. That said, I understand his interest in directing people to use his product rather than one he does not control. As I have said before:

MASIE is rigorous, reliable, serves as calibration for satellite products, and continues the long and honorable tradition of naval ice charting using modern technologies. More on this at my post Support MASIE Arctic Ice Dataset

MASIE: “high-resolution, accurate charts of ice conditions”
Walt Meier, NSIDC, October 2015 article in Annals of Glaciology.

The images above come from AARI (Arctic and Antarctic Research Institute) St. Petersburg, Russia. Note how the location of remaining ice at late August varies greatly from year to year.  The marginal seas are open water, including the Pacific basins, Canadian Bays (Hudson and Baffin), and the Atlantic basins for the most part.  Note ice extent fluctuations especially in Eurasian seas (lower right) and in Can-Am seas (upper right).  Notice the much greater ice extent in 2021 compared to 2018. As discussed later on, some regions retain considerable ice at the annual minimum, with differences year to year. [Note: Images prior to 2009 are in a different format.  AARI Charts are (here)

The annual competition between ice and water in the Arctic ocean is approaching the maximum for water, which typically occurs mid September.  After that, diminishing energy from the slowly setting sun allows oceanic cooling causing ice to regenerate. Those interested in the dynamics of Arctic sea ice can read numerous posts here.  This post provides a look at end of August from 2007 to yesterday as a context for anticipating this year’s annual minimum.  Note that for climate purposes the annual minimum is measured by the September monthly average ice extent, since the daily extents vary and will go briefly lowest on or about day 260. In a typical year the overall ice extent will end September slightly higher than at the beginning.

The melting season mid July to mid August shows 2024 melted at nearly the average rate, while retaining more ice extent at the end than some other recent years of note.

Firstly note that on average August shows ice declining 1.8M km2 down to 4.9M km2.  2024 started 288k km2 below average and on day 244 was only 98k km2 or 2% in deficit to average. The extents in Sea Ice Index in orange  were considerably lower during August, meaning that SII August 2024 monthly average will be ~400k km2 lower than MASIE., nearly half a Wadham.

The table for day 244 shows how large how the ice is distributed across the various seas comprising the Arctic Ocean.

The largest deficit to average is in Beaufort Sea, followed by smaller losses in Greenland Sea, CAA and Central Arctic.   Hudson Bay and Barents Sea are mostly open water. The offsetting surpluses are in Chukchi, East Siberian and Laptev seas.

For context, note that the average maximum has been 15M, so on average the extent shrinks to 30% of the March high before growing back the following winter. Presently 2024 is at 32% of last March maximum.  In this context, it is foolhardy to project any summer minimum forward to proclaim the end of Arctic ice.

Resources:  Climate Compilation II Arctic Sea Ice