At the beginning of August JAXA/ViSHOP extent is 3rd lowest for the date in the satellite era:
In 2012 extent had just started its unprecedented plunge towards the record September minimum, and 2024 seems certain to cross above the 2012 curve shortly. However, the latest AMSR2 sea ice concentration map from the Alfred Wegener Institute reveals areas of open water across the majority of the Central Arctic Basin:
In particular the sea ice between the North Pole and northern Greenland is remarkably fragmented:
“False colour” image of the North Pole on August 3rd from the MODIS instrument on the Terra satellite
The JAXA/ViSHOP web site is currently down, so here is the current OSI SAF extent graph for the end of May:
2012’s “June cliff” is almost upon us, and if 2024’s current trajectory continues extent will cross above 2012 for the first time since February in a week or so.
Whilst waiting for the all important thickness and volume data to arrive, we’ll start the new year in traditional fashion with a graph of JAXA extent:
The 2023 calendar year finished with this particular extent metric sitting at 15th lowest in the satellite era.
From Niall Dollard on the Arctic Sea Ice Forum comes evidence via the Sentinel 1A satellite that an arch formed in the Nares Strait between Greenland and Ellesmere Island in late December:
Please note the current record low NH snow extent. Matt predicts all that is about to change:
How sure? And in what way "totally different"?
Have you pointed out to Tony yet that the current daily snow cover data you cite utterly negates his recent assertion that "Autumn/Winter snow cover has been increasing for almost 60 years"?
Hot off the Scandinavian virtual printing presses, here is the official December Arctic sea ice extent trend graph from the OSI SAF:
That’s “Steve”/Tony’s current metric du jour. When do you suppose he will bring it to the attention of his horde of regular readers? It’s accompanied by this matching concentration map:
Here too is the CryoSat-2/SMOS thickness map for December 31st, in a different format to the one usually used here:
[Update – January 3rd]
The December PIOMAS modelled gridded thickness data has been released. The calculated volume is 6th lowest in the satellite era:
Here is the equivalent CS2/SMOS volume graph
Here too is the PIOMAS thickness map for December 31st:
This uses the same Greenland down orientation and 2.5 meter maximum scale value as the CS2/SMOS map above.
The end of 2023 had above average sea ice growth, bringing the daily extent within the interdecile range, the range spanning 90 percent of past sea ice extents for the date. Rapid expansion of ice in the Chukchi and Bering Seas and across Hudson Bay was responsible.
Average Arctic sea ice extent for December 2023 was 12.00 million square kilometers, ninth lowest in the 45-year satellite record . Sea ice extent increased by an average of 87,400 square kilometers per day, markedly faster than the 1981 to 2010 average of 64,100 square kilometers per day.
After a delayed start to the freeze-up in Hudson Bay, sea ice formed quickly from west to east across the bay, leaving only a small area of open ocean near the Belcher Islands at month’s end. In the northern Atlantic, sea ice extent remained below average extent, as has been typical for the past decade.
For December overall, 2023 had the third highest monthly gain in the 45-year record at 2.71 million square kilometers, behind 2006 at 2.85 million square kilometers and 2016 at 2.78 million square kilometers.
Moving on to the “Conditions in context” section:
Warm conditions prevailed over the central Arctic Ocean and Beaufort Sea regions, as well as over Hudson Bay and much of northern Canada, with air temperatures at the 925 millibar level (around 2,500 feet above sea level) 8 to 9 degrees Celsius above the 1991 to 2020 average. Elsewhere, relatively cool conditions prevailed, with air temperatures 2 to 4 degrees Celsius below average in southwestern Alaska, easternmost Russia, Scandinavia, and southeast Greenland. Cool conditions in the Bering and southern Chukchi Seas explain the rapid ice growth there. By contrast, the warm conditions over Hudson Bay, continuing since November, explain its delayed start of ice formation there.
The atmospheric circulation pattern for December was marked by low sea level pressure over the Gulf of Alaska and northern Europe and high sea level pressure over central Russia. This pattern led to cold Arctic air flowing across the Chukchi Sea and into the Bering Sea as well as advection of relatively warm air across Canada into the Beaufort Sea:
Here’s a taste, but there’s much more at the dedicated article linked to above:
[Update – January 12th]
A change is as good as a rest, so here’s the AWI “high resolution” AMSR2 Arctic wide sea ice extent graph
It’s currently highest for the date in the AMSR2 era by a significant margin.
Here too is the ice age map for the end of 2023:
[Update – January 19th]
Something seems to have gone wrong with the processing of the mid-month PIOMAS gridded thickness data. For the moment we’ll have to make do with just the CryoSat-2/SMOS thickness map:
and volume graph:
With the perennial caveat of a probable upward revision when the reanalysed data is released, Arctic sea ice volume is still close to the bottom of the range during the CryoSat-2 era.
In addition especially for Matt, “Steve”/Tony and numerous others of a “skeptical” persuasion, here are the latest Environment & Climate Change Canada snow extent and snow water equivalent graphs for the northern hemisphere:
Last but certainly not least is the Rutgers Global Snow Lab northern hemisphere snow cover anomaly chart for December:
[Update – January 29th]
A winter cyclone is stirring up the far North Atlantic. It’s currently forecast to bottom out later today with a minimum MSLP of 937 hPa:
The storm has been creating a long period swell directed at the ice edge in the Barents Sea. By midnight that swell will be battering the ice in the Fram Strait too:
[Update – January 30th]
According to Environment Canada the cyclone bottomed out with an MSLP of 939 hPa at 12 PM UTC yesterday:
Associated with the storm is a pulse of abnormally warm air reaching to the North Pole and beyond:
Here’s how JAXA extent looks as the big swell arrives:
And here’s the lead enhanced AWI AMSR2 concentration map of the Atlantic periphery:
Let’s see how things change over the next few days.
[Update – January 31st]
Here’s a preliminary look at the effect of the recent Arctic cyclone and other “weather” on the sea ice in the Fram Strait and Barents & Kara Seas:
There is also another cyclone heading for the Barents Sea. This one is forecast to bottom out at 936 hPa at around midnight tonight near the Norwegian coast:
P.S. The cyclone mentioned just above has been named Storm Ingunn by the Norwegian Meteorological Institute:
👀 This swirl of cloud is #StormIngunn – an intense area of low pressure that's still rapidly deepening
😮 Wind gusts of over 120 mph have been reported in the Faroe Islands with the storm now moving towards Norway pic.twitter.com/TNuo52L7MW
By way of a change, which is allegedly as good as a rest, let’s start the new month with a very pretty and almost cloud free “pseudo-colour” image of the Lena Delta and adjacent areas of the Laptev Sea:
“False colour” image of the Lena Delta on June 1st from the MODIS instrument on the Aqua satellite
At the beginning of the New Year all the central regions of the Arctic are now refrozen apart from a small area of the Kara Sea:
Most Arctic sea ice metrics are near the middle of their respective ranges over the last decade. By way of example, here is a graph of Arctic Freezing Degree Days based on the Danish Meteorological Institute’s temperature data for the area north of 80 degrees latitude:
Here too are the high resolution AWI AMSR2 area and extent graphs:
The latest AWI CryoSat-2/SMOS volume graph tells a similar story:
Although overall volume is in the middle of the pack, the associated thickness map:
and the thickness anomaly map from the Finnish Meteorological Institute reveal an unusual distribution of thicker ice:
A considerable volume of ice currently situated between Svalbard and North East Greenland seems destined to exit the Central Arctic Basin via the Fram Strait over the coming months.
[Edit – January 24th]
In a somewhat belated mid month update, here’s the PIOMAS daily Arctic sea ice volume graph:
together with the PIOMAS thickness map on January 15th:
For comparison purposes here’s the AWI CryoSat-2/SMOS thickness map using the same scale:
Note the change of scale from the beginning of the month CS2/SMOS map at the top.
Here too is Lars Kaleschke’s animation of recent Arctic sea ice concentration, with the width of leads exaggerated to reveal ice motion:
Click to animate (10 Mb!)
Evidently sea ice export from the so called “last ice area” is continuing via the Nares Strait and in particular via the Fram Strait between Greenland and Svalbard.
Although not on the same scale as the cyclone at around the same time last year, surface pressure of a storm near Svalbard bottomed out at 965 hPa yesterday:
It will be interesting to see what effect the storm has on the ice on the Atlantic periphery over the next few days.
Extremely belatedly I’ve just discovered that many weeks ago Sébastien Roubinet set out on another expedition to cross the Arctic Ocean in an ice skating catamaran, now christened Babouch-ty. Seb has already led several similar expeditions in the high Arctic, and on this occasion he is accompanied by Eric André and Jimmy Hery. They set sail from Sachs Harbour on Banks Island at the end of June, and have seen many sights since then! Here are a few of them:
Here too is a more recent image of Babouch-ty and Ellesmere Island:
The Nagalaqa tracking map shows that Babouch-ty looks set to round Cape Columbia, the northernmost point on Ellesmere Island, round about now:
The original aim of the expedition was to reach Svalbard via Cap Morris Jesup, but given the length of time it has taken the team to get this far they have sensibly decided to take an early exit from the Central Arctic via the Nares Strait:
[Edit – September 26th]
Seb has decided to terminate the Nagalaqa Expedition in the Nares Strait, north of the Kane Basin:
Winds of more than 30 knots are forecast. The weather window didn’t really open. Luckily we’re not on the water, with our wobbly little boat, it would have been catastrophic… Here and now, the winds, the cold, the snow, the darkness remind us that winter is back. The Arctic requires patience, perseverance, but also a large dose of humility. We are waiting for better weather conditions so that a helicopter can take off and pick us up. In a few days, we will leave Babouch-ty, dismasted, coiled in a fold of ground and moored to bags of stones… This expedition ends here for this year.
2021 has been and gone, so first of all may I wish all our readers a very Happy New Year.
Sadly it’s not been a happy start to 2022 for the inhabitants of Boulder, Colorado, home of the National Snow and Ice Data Center. According to the Denver Post:
The Marshall fire destroyed an estimated 991 homes in Boulder County, damaged 127 more and may have killed three people, Sheriff Joe Pelle said Saturday afternoon.
Pelle added that the cause of the fire — the most damaging in Colorado history — remains under investigation, and confirmed that sheriff’s officials have served a search warrant on at least one property based on a tip.
Currently, two people are missing in Superior and another is missing in the Marshall area, Pelle said. All three are feared dead as each of their homes was lost to the fire, the sheriff said…
So far, officials say Thursday’s wildfire — exacerbated by 100-mph winds — burned more than 6,000 acres across Boulder County.
The fire destroyed 553 homes in Louisville, damaging 45, Pelle said Saturday. It also destroyed 332 homes in Superior, damaging 60 in that town, and destroyed 106 homes in unincorporated Boulder County, damaging 22…
Moving north to examine snow and ice data from the Arctic, let’s start 2022 in traditional fashion with a look at high resolution AMSR2 area and extent:
Both metrics are now near the upper boundary of the last 10 years’ range. The AMSR2 instrument wasn’t launched into orbit until summer 2012, but according to both JAXA and NSIDC data extent on January 1st 2022 is almost identical to the same date in 2012. Regular readers will recall that year went on to produce the lowest annual minimum extent in the satellite era despite recording the highest annual maximum in the decade of the 2010s:
Note that sea ice volume tells a rather different story. Here’s the latest AWI CryoSat-2/SMOS volume graph:
The current near real time data is likely to be revised upwards slightly when the final reanalysis is complete, but even so volume seems likely to remain in the lower half of the recent range at the end of 2021.
Once again the ice in the so called “last ice area” north of Greenland and Ellesmere Island is thinner than usual, as is the ice in the Fram Strait and East Greenland Sea.
[Edit – January 11th]
As has been pointed out below, the Polar Science Center has now released the PIOMAS volume data for December 2021:
Average Arctic sea ice volume in December 2021 was 13,300 km3. This value is the 9th lowest on record for December, about 2100 km3 above the record set in 2016. Monthly ice volume was 51% below the maximum in 1979 and 37% below the mean value for 1979-2020. Average December 2021 ice volume was 1.2 standard deviations above the 1979-2020 trend line.
November and December of 2021 saw relative rapid ice growth for recent years, bringing the mean ice thickness (above 15 cm thickness) towards the thicker end of the recent values.
The ice thickness anomaly map for December 2021 relative to 2011-2020 continues to show anomalies divided into positive and a negative halves with areas of positive anomalies increasing since the two prior months and stretching from the Beaufort, over the pole and into the Barents. Negative anomalies stretching from Fram Strait, North of Greenland and along the Canadian Archipelago. Areas North of Greenland again feature low ice thickness as in prior years.
Note that as revealed by this animation from NASA Worldview the sea ice in the Lincoln Sea is currently still breaking up and being exported from the Central Arctic via the Nares Strait:
[Edit – January 25th]
The Atlantic side of the Arctic Ocean has been taking a bit of a battering from what I shall henceforth refer to as the Great Arctic Winter Cyclone of 2022, or GAWC 2022 for short. Unless there’s an even deeper one later in the year of course!
According to the Canadian Meteorological Centre the storm achieved a minimum Mean Sea Level Pressure of 937 hPa at 12 noon UTC yesterday:
Here are the visible effects of the storm on the sea ice in the area so far, now updated to January 25th:
Christmas is coming. Santa’s secret summer swimming pool has frozen over. The time has come for a new monthly Arctic update.
The JAXA/ADS/ViSHOP web site is undergoing maintenance for a week, so let’s start the festive season with a look at high resolution AMSR2 area and extent:
After a brief hiatus in early November both metrics are once again tracking within, but near the upper bound of the last 10 years.
Next let’s take a look at the latest AWI CryoSat-2/SMOS thickness map:
together with the anomaly map from the Finnish Meteorological Institute:
Still thinner than usual in the so called “last ice area” north of Greenland and Ellesmere Island, and thicker than usual on the Siberian side of the Arctic, particularly in the Chukchi Sea.
Finally, for the moment at least, here’s the latest CryoSat-2/SMOS volume graph:
Unlike the previous metrics, this particular one is close to the middle of the pack.
Sea ice extent increased at a faster than average pace through November and by the end of the month, extent was just within the interdecile range. Extent was above average in the Bering Sea, but Hudson Bay remained unusually ice free through the month.
The November 2021 monthly average extent was 9.77 million square kilometers (3.77 million square miles), which ranked tenth lowest in the satellite record. The 2021 extent was 930,000 million square kilometers (359,000 million square miles) below the 1981 to 2010 long-term average. Extent was higher than average in the Bering Sea, but is extremely low in Hudson Bay.
Air temperatures at the 925 millibar level (about 2,500 feet above the surface) were well above average north of the Canadian Archipelago, by as much as 6 degrees Celsius. Conversely, temperatures over southwest Alaska and the eastern sector of the Bering Sea were as much as 6 degrees Celsius below average:
The sea level pressure pattern for November featured widespread low pressure over the Atlantic side of the Arctic and extending into the Barents and Kara Seas, paired with a moderately strong Beaufort Sea High. Strong low pressure over the Gulf of Alaska resulted in a circulation pattern in the eastern Bering Sea that brought cold air from the north. This pattern was favorable for sea ice growth, and can explain the above average ice extent in the region:
[Edit – December 7th]
Since the start of December high resolution AMSR2 extent has been flatlining:
Sea ice area has even declined slightly over the past few days:
Here too is an animation created by Uniquorn on the Arctic Sea Ice Forum using AWI ASMR2 data to reveal ice movement through the Nares Strait during December:
[Edit – December 9th]
The JAXA/ADS/ViSHOP web site is down again, so let’s take another look at high resolution AMSR2 area and extent:
It seems that the “brief hiatus” is over, and extent is now in a “statistical tie” with 2018/19 at 4th lowest for the date amongst recent year.
[Edit – December 13th]
The PIOMAS Arctic sea ice volume data for November 2021 has been released:
Average Arctic sea ice volume in November 2021 was 7,830 km3. This value is the 7th lowest on record for November, about 1600 km3 above the record set in 2016. Monthly ice volume was 61% below the maximum in 1979 and 45% below the mean value for 1979-2020. Average November 2021 ice volume was about one sigma above the 1979-2020 trend line. October saw relative rapid ice growth for recent years bringing the mean ice thickness (above 15 cm thickness) above the recent low values:
The ice thickness anomaly map for November 2021 relative to 2011-2020 continues to show anomalies divided into positive and a negative halves with areas of positive anomalies increasing since the two prior months. Negative anomalies stretching from North of Greenland and along the Canadian Archipelago across the Eastern Arctic into the Barents Sea. Areas North of Greenland again feature very low ice thickness as in prior years (see our recent paper). Positive anomalies are notable in the Beaufort and Chukchi seas due to advection of thicker older ice into the areas during the previous winter (See recent paper on this). The Alaskan summer has also been relatively cold contributing to unusually thick ice in this area:
CryoSat-2 ice thickness shows a similar picture sea ice thickness anomalies but with the maxima slightly displaced which maybe due to temporal sampling of the composite:
The JAXA web site is still down, so here’s another set of high resolution AMSR2 graphs:
[Edit – December 14th]
NOAA have just released their 2021 Arctic Report Card. Here’s the introductory video:
“Everybody knows [the Arctic] is a canary when it comes to climate change,” says Peter Jacobs, a climate scientist at NASA’s Goddard Space Flight Center, who presented the work on 13 December at a meeting of the American Geophysical Union. “Yet we’re misreporting it by a factor of two. Which is just bananas.”
Jacob’s co-authors include researchers who oversee several influential global temperature records, and they noted the faster Arctic warming as they prepared to release the global temperature average for 2020. NASA’s internal peer reviewer challenged the higher figure, suggesting the scientific literature didn’t support it. But the researchers have found the four times ratio holds in record sets from both NASA (3.9) and the United Kingdom’s Met Office (4.1), and they hope to soon include the Berkeley Earth record. (Their work also has company: In July, a team at the Finnish Meteorological Institute posted a preprint also arguing for the four times figure.)
The researchers found Arctic warming has been underestimated for a couple of reasons. One is climate scientists’ tendency to chop each hemisphere into thirds and label the area above 60°N as the “Arctic”—an area that would include, for example, most of Scandinavia. But the true definition of the Arctic is defined by Earth’s tilt. And, as has been known for centuries, the Arctic Circle is a line starting at 66.6°N. When researchers lump in the lower latitudes, “you’re diluting the amount of Arctic warming you’re getting,” Jacobs says. “That is not a trivial thing.”
The other difference is the choice of time periods over which the warming rate is calculated. Jacobs and his colleagues focused on the past 30 years, when a linear warming trend emerged for the Arctic. Analyses that look at longer term trends see less divergence between the Arctic and the world.
[Edit – December 23rd]
Here is the latest CryoSat-2/SMOS volume graph, now including some reanalysed data which seems to have come in slightly higher than the earlier “near real time” numbers:
Plus the AWI thickness map:
Further discussion of the divergence between volume and extent continues in the new New Year 2022 thread:
Since the FMI make the gridded data available as well as that visualisation, here’s a closer look at the Bering/Chukchi area:
There’s an awful lot of thin ice in the region ripe for rapid melting now that the sun is shining down for a rapidly increasing number of hours per day. Over on the other side of the North Pole there’s also some significant swell forecast to hit the Atlantic edge of the Arctic ice pack. Here’s the current WaveWatch III forecast for 09:00 UTC tomorrow morning:
Finally, for the moment at least, here are the current Arctic wide high resolution AMSR2 sea ice area and extent graphs:
[Edit – March 22nd]
This Sentinel 1 SAR image of the Lincoln Sea from PolarView suggests that the northern arch of the Nares Strait is breaking up once again:
It is therefore conceivable that sea ice in the Lincoln Sea will continue to break up and flow south through the Nares Strait for the entire 2018/2019 winter.
[Edit – March 23rd]
Bering Sea ice area has “rebounded” over the last few days:
and taken the Arctic wide metrics with it:
Here’s the latest Sentinel 1 SAR image of the Lincoln Sea and northern Nares Strait:
[Edit – March 24th]
The “rebound” has reversed:
With temperatures above freezing point across the Bering and Chukchi Sea forecast for tomorrow morning expect the decline in Arctic sea ice extent to accelerate:
[Edit – March 25th]
There was a 162k decline in high resolution extent yesterday:
Here also is the current state of the thick sea ice exiting the Lincoln Sea via the Nares Strait:
[Edit – March 27th]
Here’s another week’s merged CryoSat-2/SMOS thickness data from the Finnish Meteorological Institute:
[Edit – March 30th]
We’re still waiting for Wipneus’ Raspberry Pi to crunch the high resolution AMSR2 numbers, but here’s the latest from JAXA:
2019 currently in 3rd place by a whisker.
P.S. The high resolution AMSR2 numbers are out:
Area is certainly lowest for the date in the AMSR2 era. Extent will almost certainly achieve that status tomorrow. Excluding the two most peripheral seas reveals perhaps an even more worrying picture?
[Edit – March 31th]
Arctic sea ice coverage is now firmly in the “lowest extent for the date in the satellite record” category, whichever metric you care to choose:
The NSIDC 5 day average is in a “statistical tie” for first place with 2017:
Before we got on to the more usual Arctic metrics let’s bear in mind that the beginning of May is the time when the ice on the mighty Mackenzie River begins to break up, ultimately sending a surge of (comparatively!) warm water rushing into the Beaufort Sea. The patches of open water visible in the Beaufort Sea off the Mackenzie Delta in early April refroze, but have recently opened up once again:
NASA Worldview “true-color” image of the Beaufort Sea on May 2nd 2017, derived from the MODIS sensor on the Terra satellite
Meanwhile Northern Hemisphere snow cover is falling fast, albeit still above last year’s levels:
Here’s the current view of the Liard River in northern Canada, with the Mackenzie River running bottom to top on the right hand side:
NASA Worldview “true-color” image of the Liard and Mackenzie Rivers on May 2nd 2017, derived from the MODIS sensor on the Terra satellite
The break-up of the Liard leads the Mackenzie, and taking a look at last year’s view of the same area it’s apparent that this year there’s somewhat more snow on the ground, and that this years Mackenzie break-up will therefore be a few days later than last year:
NASA Worldview “true-color” image of the Liard and Mackenzie Rivers on May 2nd 2016, derived from the MODIS sensor on the Aqua satellite
Whilst early melt in the Beaufort Sea is currently behind last year, the reverse is most certainly the case next door in the Chukchi Sea. The skies are rather cloudy there at the moment, but using the Suomi NPP day/night band to peer through the gloom reveals this:
NASA Worldview “day/night band” image of the Chukchi Sea on May 2nd 2017, derived from the VIIRS sensor on the Suomi satellite
Whilst sea coverage on the Pacific periphery has continued to fall, extent on the Atlantic side has not been following suit. Hence overall Arctic sea ice area is no longer lowest in the satellite record:
Finally, until the new PIOMAS numbers are released at least, here’s how DMI freezing degree days look at the moment:
[Edit – May 4th]
The April PIOMAS numbers have been published: Arctic sea ice volume is yet again by far the lowest on record:
[Edit – May 5th]
Greenland ice sheet surface melt has started early this year:
[Edit – May 12th]
The ice break-up of the Mackenzie River is now visible as increased flow at the junction with Arctic Red River just south of the delta:
Mackenzie River flow at Arctic Red River up to May 12th 2017
Meanwhile the sea ice in the Lincoln Sea north the Nares Strait is coming apart at the seams:
NASA Worldview “true-color” image of the Lincoln Sea on May 12th 2017, derived from the MODIS sensor on the Terra satellite
[Edit – May 17th]
May seems to be shaping up as month of two halves, both spatially and temporally. Here’s an overview of the current state of play:
On the Pacific side of the Arctic sea ice area has been declining rapidly courtesy of the expanding areas of open water visible in the Beaufort, Chukchi and East Siberian Seas. It’s currently tracking below other recent years:
However over on the Atlantic side area has been flatlining, and is currently above other recent years:
Ice mass balance buoy 2017A is now located near the boundary between the Beaufort and Chukchi Seas and as the melting season in that vicinity rapidly approaches it reveals that thermodynamic thickening has thus far achieved a mere 119 cm:
Arctic wide sea ice area has recently started to decline at an increasing rate:
During the second half of the month it will be interesting to see whether the forecast high temperatures produce significant melt ponding. If so it’s conceivable that 2017 area could drop below 2016 again by the beginning of June. There already signs of surface melt at places as far apart as Franklin Bay, Chaunskaya Bay and even the Great Bear Lake!
Watch this space!
References
Muhammad, P., Duguay, C., and Kang, K.-K.: Monitoring ice break-up on the Mackenzie River using MODIS data, The Cryosphere, 10, 569-584, doi:10.5194/tc-10-569-2016, 2016.
Rood S. B., Kaluthota S., Philipsen L. J., Rood N. J., and Zanewich K. P. (2017) Increasing discharge from the Mackenzie River system to the Arctic Ocean, Hydrol. Process., 31, 150–160. doi: 10.1002/hyp.10986.
Kwok, R., L. Toudal Pedersen, P. Gudmandsen, and S. S. Pang (2010), Large sea ice outflow into the Nares Strait in 2007, Geophys. Res. Lett., 37, L03502, doi:10.1029/2009GL041872.
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