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Messages - ArcticMelt2

Pages: [1] 2 3 4
1
Arctic sea ice / Re: The 2020 melting season
« on: August 03, 2020, 08:14:14 PM »
It seems that the ice in the Arctic is in the worst condition. The scale of the melting is unique compared to past years. And soon a new stage of a sharp drop in the Extent will begin. NSDIC again registered a 100k+ loss today.

The chances that the extent will fall below 3 million km2 are increasing.

2
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: August 03, 2020, 06:55:25 PM »
Attached

This means that in terms of ice area NSDIC in the Central Arctic 2020 is in 7th place after 2016, 2012, 2011, 2007, 2017, 2013.

3
Arctic sea ice / Re: The 2020 melting season
« on: August 03, 2020, 04:27:05 PM »
The Danes predict that by August 8, warm water will reach the North Pole.

4
Arctic sea ice / Re: The 2020 melting season
« on: August 02, 2020, 05:46:19 PM »
Who knows, Extent region with red and yellow is more or less than the 2012 minimum?

5
Consequences / Re: Heatwaves
« on: July 31, 2020, 10:20:09 PM »
https://twitter.com/Ketil_Isaksen/status/1289234856967204864

Quote
The 2020 high #Arctic #Svalbard five days #heatwave in a long-term (1899 - present) context...


6
Arctic sea ice / Re: The 2020 melting season
« on: July 31, 2020, 08:01:53 PM »
2019 vs. 2020
I was intrigued by how, on your gif, the 2019 ice looked in a worse condition is some respects, particularly in looking more scattered and therefore more vulnerable, blumenkraft. 


It is also important to note that according to the data from the neighboring topic, now the Аrea sea ice in the Central Arctic equaled the September 2019 minimum.

7
Consequences / Re: Wildfires
« on: July 30, 2020, 10:47:08 PM »
https://twitter.com/WMO/status/1288841847708803073

Quote
July 2020 has witnessed escalation in #ArcticFires previously unseen in #CopernicusAtmosphere Monitoring Service Global Fire Assimilation System data.

July total estimated #wildfire CO2 emissions have totally smashed the record set in 2019, says @m_parrington




8
Arctic sea ice / Re: The 2020 melting season
« on: July 27, 2020, 12:42:07 PM »
An even clearer image of the storm.

9
Arctic sea ice / Re: The 2020 melting season
« on: July 27, 2020, 12:33:45 PM »
Watch the unfolding Low on the Barrow webcam. Wind-swept waves on the coast, steady rain... The report speaks of wind gusts 33 mph. That's 6 - 7 Beaufort.

The wave height is more than a meter. I will save it in case the camera site crashes due to too many visitors.

10
Arctic sea ice / Re: The 2020 melting season
« on: July 26, 2020, 11:56:29 PM »
Cyclone damage forecast for ice.

https://psl.noaa.gov/forecasts/seaice/

11
Arctic sea ice / Re: The 2020 melting season
« on: July 26, 2020, 11:38:25 PM »
There is a noticeable increase in surf on the Barrow webcam.

12
Glaciers / Re: Vavilov Ice Cap - Severnaya Zemlya
« on: July 26, 2020, 09:30:55 PM »
By the way, in today's photo, many cracks in the fast ice go exactly to the glacier tongue. Possible this is actually caused by the movement of the glacier.

In contrast, the July 17 image shows solid landfast ice without cracks.


13
Glaciers / Re: Vavilov Ice Cap - Severnaya Zemlya
« on: July 25, 2020, 12:09:33 PM »
A major landslide near the Vavilov ice cap?

14
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 22, 2020, 12:49:44 PM »
https://twitter.com/DrTELS/status/1285514278527737858

Quote
New spatial analysis of wildfires across the Arctic in May/June 2020, and how they compare to the satellite record (2003-2020). What is burning? Are there peat fires? What about permafrost?


15
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 22, 2020, 12:46:27 PM »
https://twitter.com/m_parrington/status/1285635765783994370

Quote
Estimated 1 Jan - 20 Jul total #ArcticCircle #wildfire carbon emissions for 2020 is highest of the 18 years of #CopernicusAtmosphere Monitoring Service GFAS data for same period with daily growth in 2019 & 2020 much earlier, 2nd week June, than 2018, 2017 & 2003-2019 mean




16
Permafrost / Re: Impact of aircraft flights on ice melting
« on: July 19, 2020, 10:19:33 AM »
By the way, the full version of the article

https://web.stanford.edu/group/efmh/jacobson/Articles/VIII/PolarReroutingClimChang12.pdf

It gives much larger numbers of flights over the Arctic Ocean in the 21st century. Not 10 thousand, but about 40 thousand every year.

Quote
Based on this analysis, 263 O-D markets had at least one percent of their flights meeting
the criteria above in 2006. The number of flights between each origin and destination in
these markets was 82,602. Of these, 40,399 (or 0.129 % of all 2006 worldwide commercial
flights) were cross-polar. The remaining 42,203 were circumpolar (flying around the Arctic
Circle). The number of 2006 cross-polar flights meeting the criteria here (40,399) is less than
the number of 2006 cross-polar flights from Fig. 1 because the source of flight inventory
data for Fig. 1 (flight schedule data from Innovata, LLC) differed from that of the Volpe
baseline inventory developed here for 2006 (Wilkerson et al. 2010).


The contribution of emission from aerosols is also taken into account there.

17
Permafrost / Re: Impact of aircraft flights on ice melting
« on: July 19, 2020, 09:39:22 AM »
More estimates from the description of the paid article:

https://www.earthisland.org/journal/index.php/articles/entry/aviations_melting_the_arctic_researchers_find_a_mind-blowingly_cheap_soluti/

Quote
new research shows that simply rerouting plane flights around the Arctic will delay Arctic sea ice melt, prevent 1.75 to 2 percent of global warming

Quote
So if you were to reroute planes around the Arctic: “Due mostly to Arctic cooling, global surface temperatures decreased by…1.75–2 % of net global warming (0.7–0.8 K) to date.”

Considering that the area of sea ice in the Arctic during the summer solstice is 10 million km2, or also 2% total surface area of the planet, it seems that aircraft flights over the Arctic are one of the main reasons for the rapid melting of sea ice.

18
Permafrost / Re: Impact of aircraft flights on ice melting
« on: July 19, 2020, 09:08:32 AM »
I think you need more science to establish a linkage between flights or lack thereof and intensity of ice melt. (Perceived) correlation is not necessarily causation. Has there been any paper quantifying the effect of flights on Arctic atmosphere, insolation, cloudiness, etc.?

By the way, there really is a scientific work that flights over sea ice accelerate its melting.

https://link.springer.com/article/10.1007/s10584-012-0462-0

Quote
The effects of rerouting aircraft around the arctic circle on arctic and global climate

Climate data suggest greater warming over the Arctic than lower latitudes, and the most abundant direct source of black carbon and other climate-relevant pollutants over the Arctic is cross-polar flights by international aviation. A relevant question is whether rerouting cross-polar flights to circumnavigate the Arctic Circle reduces or enhances such warming. To study this issue, a model accounting for subgrid exhaust plumes from each individual commercial flight worldwide was used with 2006 global aircraft emission inventories that treated cross-polar flights and flights rerouted around the Arctic Circle (66.56083 °N), respectively. Rerouting increased fuel use by 0.056 % in the global average, mostly right outside the Arctic Circle, but most of the associated black carbon and other emissions were removed faster because they were now over latitudes of greater precipitation and lesser stability. Rerouting also reduced fuel use and emissions within the Arctic Circle by 83 % and delayed pollutant transport to the Arctic. The Arctic reduction in pollutants, particularly of black carbon, decreased Arctic and global temperature and increased Arctic sea ice over 22 years. Although the slight increase in total CO2 emissions due to rerouting may dampen the benefit of rerouting over more decades, rerouting or even partial rerouting (allowing cross-polar flights during polar night only) may delay the elimination of Arctic sea ice, which will otherwise likely occur within the next 2–3 decades due to global warming in general. Rerouting may increase worldwide fuel plus operational costs by only ~$99 million/yr, 47–55 times less than an estimated 2025 U.S.-alone cost savings due to the global warming reduction from rerouting.

So the question can be closed.

19
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 17, 2020, 08:58:53 PM »
https://twitter.com/m_parrington/status/1283791660284096513

Quote
Mid-July view of #Siberia/#ArcticCircle #wildfires with #CopernicusAtmosphere Monitoring Service GFAS #opendata. Arctic daily total intensity > 2003-2018 mean & 1-15 July total estimated carbon emissions highest in 18 years of GFAS data (2004 due to Alaska fires) #ArcticFires






20
Permafrost / Re: Re: The 2020 melting season
« on: July 17, 2020, 11:44:21 AM »
Airplane trail?

Pretty positive that's it.
Normally there would be hundreds of them in various states of dissipation, forming a veil making it difficult to so clearly see single ones:


Thank you very informative.

21
Arctic sea ice / Re: The 2020 melting season
« on: July 16, 2020, 12:46:17 PM »
Today 2007 has overtaken 2006 by 450 thousand km2. Almost as well as now 2020 is ahead of 2011.

22
Arctic sea ice / Re: The 2020 melting season
« on: July 16, 2020, 10:11:43 AM »
Over the past 24 hours, the ice boundary in the Laptev Sea has moved northward by 30 km.

23
Arctic sea ice / Re: The 2020 melting season
« on: July 15, 2020, 12:35:38 PM »
I cannot remember any parallels to the action this year, so comparing it to 2011, just because it was similarly lower than the previous record, seems flawed.

There are many similarities. Another. Until this summer, in 2011 there was a record of the earliest opening of the Northeast Passage.

https://twitter.com/RARohde/status/1156567447228637184


24
Arctic sea ice / Re: Northern Sea Route thread
« on: July 14, 2020, 06:22:26 PM »
Worldview NASA hints about that the Northern Sea Route might have opened up today. Anyone who can confirm or refute that?
The image says yes, but who makes it official?

The official opening will be only in August.

https://www.hellenicshippingnews.com/northeast-passage-to-open-in-mid-august-northwest-passage-expected-to-open-in-mid-september/




But the real opening happened as early as in 2011.


https://twitter.com/RARohde/status/1156567447228637184

Quote
Periods during the satellite era when the Arctic Ocean has been passable without the use of ice-breaking ships.

Such periods have become much more common since 2008, and the start of the 2019 season is the third earliest in the satellite record.


25
Arctic sea ice / Re: The 2020 melting season
« on: July 11, 2020, 12:11:15 PM »
Today’s image of the northern coast of Taimyr. Two narrow ice barriers are the last thing that separates the NorthEastern passage from full opening. 20 days earlier than in 2012.

26
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: July 09, 2020, 06:38:16 PM »
Has there ever been a series of numbers like this before? I'm too lazy to look through the historical data. I may load it all into a SQL database to run some queries.

ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/north/daily/data/

27
Arctic sea ice / Re: The 2020 melting season
« on: July 09, 2020, 11:48:44 AM »
https://twitter.com/ZLabe/status/1280869972713996289

Quote
No improvement to #Arctic sea ice conditions around Siberia. The record early loss continues...



https://twitter.com/AlaskaWx/status/1280904696366985221

Quote
#Arctic-wide #seaice extent from @NSIDC passive microwave data for July 07 is lowest in the satellite era. However, Alaska is not playing along. Combined ice extent in Beaufort & Chukchi Seas is highest since 2013 & just below the long term average. #akwx @Climatologist49 @ZLabe


28
Science / Re: Satellite News
« on: July 06, 2020, 07:46:16 PM »
Could ICESAT-2 replace the traditional NSIDC stats?

It seems IceSat2 uses lasers and does not see anything through the clouds.

It may be better for NOAA to make small satellites with radiometers that will measure the area of ice every hour, and not once a day.

29
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: July 06, 2020, 06:28:41 PM »

I attach a table of measurement uncertainties from a research letter  https://iopscience.iop.org/article/10.1088/1748-9326/aaf52c

To be sure of a new record low ideally several days a few tens of thousands of Km2 below the current minimum are needed to be sure. The current sensors have their limitations, but one must be grateful they exist at all. The NSIDc and JAXA instruments are well beyond their design life and as yet no announcements of compatible replacements to maintain the continuous 41 year record.

Thank you, Gerontocrat.  I understand better now.  It is sobering to think that we may be having thrill flights for the uber-rich up into space soon, and yet we might not be sending anything up there to replace the NSIDC and JAXA instruments.

Answered in another thread
https://forum.arctic-sea-ice.net/index.php/topic,2750.msg272161.html#msg272161

30
Science / Re: Satellite News
« on: July 06, 2020, 06:23:18 PM »
My last post was deleted due to offtopic (?), so I answered in another thread.

Quote from: Gerontocrat
The current sensors have their limitations, but one must be grateful they exist at all. The NSIDc and JAXA instruments are well beyond their design life and as yet no announcements of compatible replacements to maintain the continuous 41 year record.

Thank you, Gerontocrat.  I understand better now.  It is sobering to think that we may be having thrill flights for the uber-rich up into space soon, and yet we might not be sending anything up there to replace the NSIDC and JAXA instruments.

You are incorrectly informed. JAXA firmly intends to launch into space a replacement AMSR2, AMSR3, around 2023.

This spring there was even news that the manufacturer of the new satellite was selected.

https://www.spacedaily.com/reports/Mitsubishi_Electric_to_build_GOSAT_GW_satellite_to_study_atmospheric_and_hydro_cycles_999.html

In the near future, we will only lose NSDIC data. They are low resolution, and now are of little value.

31
Arctic sea ice / Re: The 2020 melting season
« on: July 06, 2020, 04:40:04 PM »
https://twitter.com/ZLabe/status/1280136370845958145

Quote
Comparing 2020 and 2012 sea ice extents in the Laptev Sea (near Siberia; #Arctic)


32
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: July 05, 2020, 10:38:41 PM »
The NSIDc and JAXA instruments are well beyond their design life and as yet no announcemets of compatible replacements to mantain the continuous 41 year record.

https://www.wmo-sat.info/oscar/satellites/view/752
Quote
Satellite: GOSAT-GW (2022 - 2027)

 The MW radiometer, AMSR-3, will be a follow-on of AMSR-2 being flown on GCOM-W, with addition of channels at 10.25 GHz, 165.5 GHz and in the 183 GHz band.

And with the original data NSDIC is really nearing completion.
https://twitter.com/ZLabe/status/888809735830425600
https://tc.copernicus.org/articles/13/49/2019/

33
Arctic sea ice / Re: The 2020 melting season
« on: July 05, 2020, 08:56:51 PM »
https://twitter.com/AlaskaWx/status/1279831110608842753/photo/1

Quote
Great view Saturday afternoon from NOAA-20, image courtesy @uafgina. Unusually clear skies over NW Alaska show dramatic but typical diffs in #seaice around Utqiaġvik: ice remains east of Pt. Barrow. Inland, ice remains on lakes north of 70.5N.


34
Arctic sea ice / Re: The 2020 melting season
« on: July 05, 2020, 03:01:05 PM »
Looking at Aluminium's invaluable animation playing over a few times, it looks like the clockwise rotation of the ice pack, perhaps resulting from the nascent anticyclone, and the consequent Coriolis-Effect-driven compaction of the ice pack may already be taking place.  So, props to grixm, gandul etc.

Along with general melting, this would help explain the recent dramatic drops in extent in the Central Arctic Sea.  Not so sure how it explains the drop in area though...  And again, if there is significant meltponding in the central ice, wouldn't that show up as consistent patches?

You can also see the average ice drift pattern over the past three days. Well see how the ice moves around the incipient anticyclone.

The most significant effect is that the warm air masses from the Kara Sea penetrate north, and expand the depression in the ice. As can be seen in the animation of Aluminum, this recess has greatly expanded over the past and now has reached 82.5 degrees north latitude.

So I was wrong when I said that the Kara Sea is of little importance for summer melting. In fact, it strengthens the warm masses moving towards the Central Arctic from the Atlantic.

35
Arctic sea ice / Re: The 2020 melting season
« on: July 05, 2020, 12:53:23 PM »
Сan see how quickly the large ice floe of fast ice 30 km in size disappears into the Laptev Sea.

36
Arctic sea ice / Re: The 2020 melting season
« on: July 05, 2020, 11:51:35 AM »
June 30 - July 4.

The Northeast passage is close to early open. When is the earliest opening of this passage?

One of the last ice barriers in the Kara Sea is practically open.

Image from today:

37
Arctic sea ice / Re: SMOS
« on: July 04, 2020, 07:54:55 PM »
Today, by the way, the region not subject to melting has practically disappeared. As in 2012.

38
Arctic sea ice / Re: The 2020 melting season
« on: July 04, 2020, 05:22:34 PM »
If you believe the picture from the Neven site, now 2020 is ahead of 2014 by a week in the Laptev Sea.



And the anomaly in the water temperature in the Laptev Sea in 2014 was much less.

39
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 04, 2020, 01:04:59 PM »
Smoke from Siberian fires reached the North Pole.

In addition, forecasts say that soot from this cloud has fallen completely in the Central Arctic.

https://atmosphere.copernicus.eu/charts/cams/aerosol-forecasts

40
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 04, 2020, 12:17:20 PM »
Smoke from Siberian fires reached the North Pole.

https://twitter.com/m_parrington/status/1278591899763388416

2:30 PM · July 2 2020.·Twitter Web App

Quote
A long smoke plume from #Siberia #wildfires was predicted to reach the North Pole in forecasts of aerosol optical depth & total column carbon monoxide initialized at 00z on 1 July 2020 from the #Copernicus Atmosphere Monitoring Service




41
Arctic sea ice / Re: The 2020 melting season
« on: July 03, 2020, 07:38:22 PM »

I think some people will take issue with a forecast that shows large parts of the CAB with no top melt during sunny weather at peak insolation.

Yes, the camera at the North Pole often showed melting ponds.



Example

http://nsidc.org/arcticseaicenews/2013/08/

http://nsidc.org/arcticseaicenews/files/2013/08/Figure41-350x371.png

Quote
Figure 4. These comparison images show the North Pole Web Cam on July 25, 2013 (top), and July 30, 2013 (bottom).

Quote
First, the webcam is not at the North Pole. Because of the drift of the ice, as of this week it is actually located at about 84 degrees North near the prime meridian. Second, the so-called lake is nothing more than a large summer melt pond atop the ice cover, and is not, as some have said, a hole or a polynya in the ice cover. While quite extensive by July 26, the pond appears to have largely disappeared by July 30, by draining off the sea perhaps through a fracture, followed by a dusting of snow.

Can you share a link to these forecasts? I'd be interested in checking them out.

https://psl.noaa.gov/forecasts/seaice/

Snow Ice -> Ice Melt Terms

42
Arctic sea ice / Re: The 2020 melting season
« on: July 03, 2020, 06:11:47 PM »
https://twitter.com/ZLabe/status/1279081395554357248

Quote
Sea surface temperatures will continue to rise along the Siberian coast due to the unprecedentedly early loss of #Arctic sea ice in this region ---> dark water absorbing sunlight + recent heatwave


43
Arctic sea ice / Re: The 2020 melting season
« on: July 03, 2020, 05:56:04 PM »
If you have a lot of free time, then look at the situation in the summer of 2008, when there are detailed published data.

http://nsidc.org/arcticseaicenews/2008/08/


More similar data

http://nsidc.org/arcticseaicenews/2013/09/

Quote
During the summer of 2013 there were six ice mass balance buoys deployed in the Arctic over a wide area (red dots in Figure 5). The buoys were deployed in undeformed, multiyear ice, with a thickness between 2.2 and 3.5 meters (7 and 11 feet) before melt began. Data from the buoys show that the amount of surface ice melting ranged from 0 in the central Arctic, to 75 centimeters (30 inches) in the Beaufort Sea. Bottom melting varied from 8 to 108 centimeters (3 to 43 inches). The largest amount of bottom melting was observed at a buoy near the ice edge in the Beaufort Sea. This buoy had the largest total amount of melt, thinning from 339 centimeters (133 inches) in early June, to 157 centimeters (62 inches) on August 28. Ice thicknesses at the other buoys on August 28 ranged from 121 to 267 centimeters (48 to 105 inches). While bottom melting is continuing in some locations, most of this year’s surface melting has occurred. Data from the ice mass balance buoys are available at http://imb.crrel.usace.army.mil. (Thanks to Jackie Richter-Menge and Don Perovich at the Cold Regions Research and Engineering Laboratory [CRREL] for this part of the discussion.)

http://nsidc.org/arcticseaicenews/files/2000/09/figure5-350x286.png

Quote
Figure 5. This map of the Arctic shows results from six ice mass balance buoys that operated throughout the summer of 2013. A red dot denotes each buoy position on August 28, 2013. The red bars indicate the total amount of summer surface melt and the yellow bars show bottom melt. The white background is the MASIE ice extent on August 28, 2013 mapped on Google Earth.

Credit: NSIDC courtesy Jackie Richter-Menge and Don Perovich/CRREL


It is clearly seen that many such buoys in the Arctic usually unfold, a year after the catastrophic melting. And when nothing interesting happens in the Arctic, there is no funding, no buoys.  :-X


P.S. Data for 2011

http://nsidc.org/arcticseaicenews/2011/08/

44
Arctic sea ice / Re: The 2020 melting season
« on: July 03, 2020, 05:36:32 PM »

Questions:
Am I correct in thinking that this high pressure system, if it indeed causes mostly clear skies at peak insolation, all while the ice is highly preconditioned compared to other years, will show its effects mostly in August when bottom melt takes over? As in 2012 when the ice losses in the CAB just kept going down and down? while other years levelled off in August?

Am I correct in remembering that this kind of sunshine can cause up to 5cm/day of top melt? So this week long HP could melt 30cm off of wide swaths of the ASI?

If the water under the ice warms up, how much ice starts melting per day? 0.5cm? 1cm? Do we know how fast bottom melt was going in other years, when there were still buoys in the ice measuring such things?

My guess is if 20-30cm melts off the top over the next week, and bottom melt removes 30-60cm off the bottom of the ice over the next 7 or so weeks, there will not be much ice left by volume, and like Friv was saying, the main effect of this HP is going to be on volume. The ice by August will be dispersed slush in a lot of areas.

So if A) this HP does stay relatively clear of clouds, and then B) in August there is some wind bringing waves to the slush and bringing heat up from lower layers of water, there might in fact be much more melting in August than previous years.


If you have a lot of free time, then look at the situation in the summer of 2008, when there are detailed published data.

http://nsidc.org/arcticseaicenews/2008/08/

Quote
The buoys are deployed as part of the North Pole Environmental Observatory, the Beaufort Gyre Observatory, and the DAMOCLES project. The buoy data have indicated increased amounts of melt on the underside of the ice cover in recent years; bottom melt last year was particularly extreme.

The pattern for 2008 has been more mixed. The ice at some buoy locations has thinned by more than a meter through the melt season because of strong melt both on the surface and the underside of the ice. Other locations show strong thinning caused by surface melt, while only modest thinning is apparent in others. Differences in surface melt from location to location reflect factors such as air temperature, the ice albedo, and cloud conditions. The wide range in bottom melt points to variations in the amount of ocean heat absorbed. In recent days, the buoys have indicated sub-freezing temperatures with surface melt coming to an end; however, bottom melt will continue for at least two to three more weeks and the ice extent decline, while slowing, will also continue.

http://nsidc.org/images/arcticseaicenews/20080825_Figure4.png

Quote
Figure 4. Ice thickness measurements for summer 2008 indicate melt at the ice surface (red) versus the underside (yellow). This image shows changes in ice thickness at buoy locations (white circles), overlaid on the NSIDC sea ice concentration field for August 20. The numbers above each bar plot indicate total ice thickness at the beginning of the melt season compared to August 20.


You can see MODIS images for 2008, weather data for 2008, and compare with the current situation.

45
Arctic sea ice / Re: The 2020 melting season
« on: July 02, 2020, 04:25:47 PM »
https://twitter.com/ZLabe/status/1278691513795375104

Quote
Unsurprisingly, last month's #Arctic sea ice extent along the Siberian coast was the lowest June on record. The previous record low was 2012.


46
Permafrost / Re: Arctic wildfires and their effect on sea ice
« on: July 01, 2020, 02:12:40 PM »
An enlarged snapshot of the fires of the last third record


47
Permafrost / Records of the most northern fires of this summer
« on: July 01, 2020, 02:10:01 PM »
In just a week, this record changed three times...

First record

https://twitter.com/defis_eu/status/1276424986555801601
3:00 PM June 26 2020.·Twitter Web App

Quote
#EUSpace @CopernicusEU data are useful to monitor fire hotspots which are expanding to the north

Yesterday, #Sentinel2 detected what is believed to be the northernmost fire in recent years, within the #Arctic Circle, in the Republic of Sakha, #Siberia
Lat 72.7°N, Lon 118.1°E



Second record

12:12 AM June 28 2020.·Twitter Web App

Quote
Yesterday
@defis_eu shows the northern most fire in recent years, within the #Arctic Circle Old story!
Today 27 June @CopernicusEU #Sentinel2 detected another even further north (72.73N, 120.2E)!
Is this the #NewNormal? Extreme fires in the Arctic Circle?



Third record

https://twitter.com/annamaria_84/status/1278088111147319296

5:08 AM · July 1 2020·Twitter Web App

Quote
For the third time in a week, the northernmost fire record has been broken Yesterday 30 June @CopernicusEU #Sentinel2 detected the new northernmost fire in the #Arctic Circle (at 72.9N, 119.77E! #Siberia)


48
Arctic sea ice / Re: The 2020 melting season
« on: June 30, 2020, 10:12:45 AM »
https://sites.google.com/site/arcticseaicegraphs/regional

In the last five years, while three seas go in the first place: Kara, Laptev and East Siberian.

49
Antarctica / Re: What's new in Antarctica ?
« on: June 29, 2020, 08:34:22 PM »
https://www.nature.com/articles/s41558-020-0815-z

Record warming at the South Pole during the past three decades

Quote
Over the last three decades, the South Pole has experienced a record-high statistically significant warming of 0.61 ± 0.34 °C per decade, more than three times the global average. Here, we use an ensemble of climate model experiments to show this recent warming lies within the upper bounds of the simulated range of natural variability. The warming resulted from a strong cyclonic anomaly in the Weddell Sea caused by increasing sea surface temperatures in the western tropical Pacific. This circulation, coupled with a positive polarity of the Southern Annular Mode, advected warm and moist air from the South Atlantic into the Antarctic interior. These results underscore the intimate linkage of interior Antarctic climate to tropical variability. Further, this study shows that atmospheric internal variability can induce extreme regional climate change over the Antarctic interior, which has masked any anthropogenic warming signal there during the twenty-first century.

50
Arctic sea ice / Re: What's new in the Arctic ?
« on: June 29, 2020, 08:01:19 PM »
Quote
If using only the past 30-year trends, the warming rate is higher and reaches locally up to 7 times! (Note the different color scale).


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