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Author Topic: Arctic Image of the Day  (Read 509868 times)

Phil.

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Re: Arctic Image of the Day
« Reply #300 on: July 08, 2014, 01:50:38 PM »
Increased breakup of shore ice in today's radar animation north of Barrow.

http://seaice.alaska.edu/gi/observatories/barrow_radar

SteveMDFP

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Re: Arctic Image of the Day
« Reply #301 on: July 08, 2014, 07:01:21 PM »
From MODIS, wildfires in the Northwest Territories, Canada.
Great Bear Lake is visible on the right, McKenzie River above it.
The fires are obvious, and the plume of smoke is impressive.
North is to the lower right.

Phil.

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helorime

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Re: Arctic Image of the Day
« Reply #303 on: July 09, 2014, 04:24:09 PM »
The current seems to be moving at a pretty good clip along the shore.
Any sufficiently advanced technology is indistinguishable from magic.

lanevn

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Re: Arctic Image of the Day
« Reply #304 on: July 13, 2014, 02:11:08 PM »

Giant hole in the Yamal's permafrost.



Though can be fake.
They say it is somewhere here https://www.google.ru/maps/place/70%C2%B028%2742.8%22N+67%C2%B047%2752.8%22E/@70.4785556,67.798,17z/data=!3m1!4b1!4m2!3m1!1s0x0:0x0 Can anyone find this location in modis photos? I don't know how to find coordinates there
« Last Edit: July 13, 2014, 02:32:56 PM by lanevn »

Espen

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Re: Arctic Image of the Day
« Reply #305 on: July 13, 2014, 02:35:56 PM »
After watching the YouTube video, I believe it is real.
Have a ice day!

DoomInTheUK

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Re: Arctic Image of the Day
« Reply #306 on: July 13, 2014, 02:43:53 PM »
If it's been faked, then give them an oscar for special effects, and for then not overplaying it.

My money would be on it being caused by a small meteorite. A sinkhole wouldn't have any rubble around the edge.

Whatever the cause, it's eerily fascinating.

greatdying2

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Re: Arctic Image of the Day
« Reply #307 on: July 13, 2014, 02:55:31 PM »
Yikes! Maybe some kind of methane volcano?
The Permian–Triassic extinction event, a.k.a. the Great Dying, occurred about 250 million years ago and is the most severe known extinction event. Up to 96% of all marine species and 70% of terrestrial vertebrate species became extinct; it is also the only known mass extinction of insects.

Jim Hunt

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Re: Arctic Image of the Day
« Reply #308 on: July 13, 2014, 04:09:32 PM »
I typed the coordinates into EarthExplorer and came up with this. See Wipneus' Landsat 8 thread if you want to investigate further!
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SteveMDFP

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Re: Arctic Image of the Day
« Reply #309 on: July 13, 2014, 04:15:33 PM »
I think it quite resembles Turkmenistan's "Door to Hell," though that one has been burning for 40 years:
http://www.huffingtonpost.com/2013/11/20/door-of-hell_n_4311694.html


TerryM

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Re: Arctic Image of the Day
« Reply #310 on: July 13, 2014, 07:09:49 PM »
Smoking Hills, a self igniting coal seam & shale oil deposit in the Northwest Territories has been burning for a very long time. First reported by John Franklin in 1826 it's been burning ever since & now is a tourist destination for Arctic Cruises from Nome.
http://www.packridgecruises.explorertravel.co.uk/ports/index.htm?port_id=429


Terry

jdallen

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Re: Arctic Image of the Day
« Reply #311 on: July 13, 2014, 09:03:40 PM »
If it's been faked, then give them an oscar for special effects, and for then not overplaying it.

My money would be on it being caused by a small meteorite. A sinkhole wouldn't have any rubble around the edge.

Whatever the cause, it's eerily fascinating.

The rubble isn't uniform enough to be a meteorite, IMO.  It looks more to me to be eruptive - almost like a maar - from some gas build up that reached sufficient pressure to blow out the overlying material.
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jdallen

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Re: Arctic Image of the Day
« Reply #312 on: July 13, 2014, 09:07:16 PM »
Nares straight has indeed shattered and is in motion.  Worldview from 12 July 2014.  Note the increased surface melt on the ice.

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jdallen

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Re: Arctic Image of the Day
« Reply #313 on: July 13, 2014, 09:43:43 PM »
Yikes! Maybe some kind of methane volcano?
Regarding the crater, found this for structures along the Atlantic continental margin.

http://onlinelibrary.wiley.com/doi/10.1029/2004JB002969/pdf

A different structure:

http://geolog.egu.eu/wp-content/uploads/2014/02/Patomsky-1024x682.jpg

In addition, it may be possible we are misinterpreting the debris around the edge of the crater.  It may actually be infill disruption rather than material blown out.

http://www.psiee.psu.edu/research/featured_research/gooseff_permafrost.asp
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Wipneus

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Re: Arctic Image of the Day
« Reply #314 on: July 14, 2014, 08:47:33 AM »
Re. permafrost pit.

Here is a Landsat 8 image from 29th of June with those coordinates in the centre. Image is about 4.5km wide.

Wipneus

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Re: Arctic Image of the Day
« Reply #315 on: July 14, 2014, 08:56:37 AM »
20km east of the previous image I found this. Click for full resolution image.

jdallen

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Re: Arctic Image of the Day
« Reply #316 on: July 14, 2014, 10:28:37 AM »
Interesting.  Looks like drill sites, m'thinks. (second image)

I'm not sure the 1st image has caught our pit.

Drilling would imply gas or oil.  Either could generate pressure in pockets under the permafrost; more so if drilling has disturbed the underlying stratigraphy.
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lanevn

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Re: Arctic Image of the Day
« Reply #317 on: July 14, 2014, 11:51:12 AM »

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Re: Arctic Image of the Day
« Reply #318 on: July 15, 2014, 03:08:09 PM »
The large amount of rubble surrounding the sinkhole in the aerial images suggests overturning, though not like you'd see with an impactor, but rather--as several have noted--of the type that would be expected from the sudden expansion of subsurface gas. However, the ground-level video doesn't appear to match the aerial views, as the latter is almost completely devoid of the rubble displayed in the former. Too, the latter appears substantially larger than the former, telling me that either these are two separate things, or the ground level video was taken at a later date after the hole widened, causing much of the rubble-strewn perimeter to fall into it.

Interesting, anyway...

johnm33

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Re: Arctic Image of the Day
« Reply #319 on: July 15, 2014, 04:49:54 PM »
My 2c, in some of these parts the frozen ground goes down 1000m and 500m is common, so a meteorite shock wave turning the excavated cylinder to steam and only a small % of debris big enough not to be scattered for miles, then summer arrives and the permafrost upper layer dissolves and sheds its burden into the void.
 Anyone know how to get googleearth to gauge the depth?

jdallen

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Re: Arctic Image of the Day
« Reply #320 on: July 15, 2014, 05:23:49 PM »
My 2c, in some of these parts the frozen ground goes down 1000m and 500m is common, so a meteorite shock wave turning the excavated cylinder to steam and only a small % of debris big enough not to be scattered for miles, then summer arrives and the permafrost upper layer dissolves and sheds its burden into the void.
 Anyone know how to get googleearth to gauge the depth?

Sorry, it really does not have the the character necessary for a strike.  The debris is too assymetric, and one sufficient to produce a crater that size would have generated a fiery multi megaton explosion; something unlikely to have been missed.

Jim, I agree, the video and satellite images don't look like the same locations.
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Rubikscube

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Re: Arctic Image of the Day
« Reply #321 on: July 15, 2014, 05:28:50 PM »
I can't see how the aerial photo matches the ground photo at all. Neither the surrounding rubble nor the shape of the hole itself matches (it looks by the way quite suicidal to be standing were the video is taken). If the first one (aerial photo) is real, it looks like a combination of a crater and a sinkhole, which means that an explosion triggered the formation of a sinkhole. In the frames between 9 and 12 second you can clearly see a cave like feature at the bottom, which might be the cause of the sinkhole. It also appears to be plenty of water down there, but that is not necessarily a strange thing.

Atomant

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greatdying2

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The Permian–Triassic extinction event, a.k.a. the Great Dying, occurred about 250 million years ago and is the most severe known extinction event. Up to 96% of all marine species and 70% of terrestrial vertebrate species became extinct; it is also the only known mass extinction of insects.

Shared Humanity

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Re: Arctic Image of the Day
« Reply #324 on: July 16, 2014, 02:17:47 PM »
Given its location on the Yamal Peninsula, jutting into the Kara Sea which has seen extensive warming over decades, I would think this hole is a spectacular result of permafrost degradation. This peninsula was sea bed 10,000 years ago, an area of continuous permafrost and I suspect the soil is sediment. As a gas rich region, it would not surprise me if permafrost failure would cause the dramatic release of methane. I think it is unlikely that it is due to the gas extraction efforts in the area but that is possible.

The hole may be related to permafrost hydrology where thermokarst drainage weakens adjacent permafrost.

http://publik.tuwien.ac.at/files/PubDat_209968.pdf

The photos above by Wipneus suggests an expanse of thermokarsts in the area which go through a seasonal cycle of filling and drainage.

SteveMDFP

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Re: Arctic Image of the Day
« Reply #325 on: July 16, 2014, 08:50:23 PM »
More wildfires, this time from Russia.  The prominent plume of smoke is drifting almost due north, into the Arctic.  The density and extent of smoke, to my eye, looks significantly worse than what we've seen from the Northwest Territories this season.

Espen

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Re: Arctic Image of the Day
« Reply #326 on: July 16, 2014, 08:56:25 PM »
"looks significantly worse than what we've seen from the Northwest Territories this season"
You mean after legalizing pot in the south? ;)
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JayW

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Re: Arctic Image of the Day
« Reply #327 on: July 21, 2014, 03:05:55 AM »
I think Shared Humidity mentioned a small cyclone that lingered in the Arctic for several days.  Looking at NASA Worldview,  three small cyclones appear to be in relative close proximity to each other.

http://1.usa.gov/1k7oV2d
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Jim Hunt

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Re: Arctic Image of the Day
« Reply #328 on: July 21, 2014, 02:33:52 PM »
I think Shared Humidity mentioned a small cyclone that lingered in the Arctic for several days.

I think it was Werther who spotted it first.

Quote
Looking at NASA Worldview,  three small cyclones appear to be in relative close proximity to each other.

Most intriguing. They're still visible on Terra today: http://1.usa.gov/1nNlGHL

« Last Edit: July 21, 2014, 02:43:28 PM by Jim Hunt »
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seattlerocks

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Re: Arctic Image of the Day
« Reply #329 on: July 21, 2014, 04:36:45 PM »
Yeah they have similar size and look as Werther's. This time these ones are not traveling fast like that one. And they form under a (much bigger) low instead of that foggy HP (remember the golf ball).

They form a nice isosceles triangle. mmm. Magic

Really, this thing must have been described before.

jdallen

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Re: Arctic Image of the Day
« Reply #330 on: July 21, 2014, 06:01:44 PM »
Yeah they have similar size and look as Werther's. This time these ones are not traveling fast like that one. And they form under a (much bigger) low instead of that foggy HP (remember the golf ball).

They form a nice isosceles triangle. mmm. Magic

Really, this thing must have been described before.
Three probable features of this spring to mind.

1) driven in greater part or totally by local advection.
2) little or no atmospheric sheer is present to disrupt them.
3) advection driven by local evaporation from leads.

I wonder if they may be getting spun up by the huge expanses of open water in the Chukchi and Laptev?
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Espen

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Re: Arctic Image of the Day
« Reply #331 on: July 22, 2014, 05:53:58 PM »
Ice is back in Barrow (short summer  8))
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Siffy

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Re: Arctic Image of the Day
« Reply #332 on: July 22, 2014, 06:08:18 PM »
Ice is back in Barrow (short summer  8))

Is that from over night freeze or from ocean currents pushing ice there?

Phil.

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Re: Arctic Image of the Day
« Reply #333 on: July 22, 2014, 09:17:45 PM »
Ice is back in Barrow (short summer  8))

Is that from over night freeze or from ocean currents pushing ice there?

Pushed it there, if you look at the animation you can see it clear and then flow back in.

jdallen

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Re: Arctic Image of the Day
« Reply #334 on: July 24, 2014, 12:17:36 AM »
Soot much?

From EODIS, coast of Nunavit on the left, Victoria Island top.

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jdallen

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Re: Arctic Image of the Day
« Reply #335 on: July 25, 2014, 10:37:21 AM »
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Yuha

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Re: Arctic Image of the Day
« Reply #336 on: July 25, 2014, 11:23:13 AM »
Requires no explanation.

http://www.nwtfire.com/cms/nwt-fire-map

The stats to go with that map:
http://up.nwtfire.com/sites/default/files/2014-07-24_currentfiresituation.html

That's 209 active fires including 5 new ones in the last 24 hours.
Most of the fires (165) are not being fought at all, presumably because they are in the middle of wilderness and represent no immediate danger to people or property.

Espen

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Have a ice day!

pikaia

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Re: Arctic Image of the Day
« Reply #338 on: August 02, 2014, 10:03:54 AM »

nukefix

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Re: Arctic Image of the Day
« Reply #339 on: August 02, 2014, 04:25:02 PM »
Icebergs and ice melange exiting Iulissat Icefjord, Sentinel-1 SAR image on 19.7.2014

Espen

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Re: Arctic Image of the Day
« Reply #340 on: August 03, 2014, 02:05:40 PM »
This happens every year, just north of Norway:
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Shared Humanity

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Re: Arctic Image of the Day
« Reply #341 on: August 03, 2014, 05:26:54 PM »
Fog?

Espen

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Re: Arctic Image of the Day
« Reply #342 on: August 03, 2014, 05:37:49 PM »
No algae. 
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Espen

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Re: Arctic Image of the Day
« Reply #343 on: August 04, 2014, 08:42:36 PM »
This is an image of Zachariae Isstrøm, to me it looks like a Red Indian, do you see that too?
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Bob Wallace

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Re: Arctic Image of the Day
« Reply #344 on: August 04, 2014, 08:51:18 PM »
Recessed forehead sometimes seen in southern Mexico.  I didn't understand where the profiles came from in Mayan ruins until riding a local bus one day and a woman turned sideways to me.  Very distinctive.

Espen

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Re: Arctic Image of the Day
« Reply #345 on: August 04, 2014, 09:07:32 PM »
Recessed forehead sometimes seen in southern Mexico.  I didn't understand where the profiles came from in Mayan ruins until riding a local bus one day and a woman turned sideways to me.  Very distinctive.

I guess it comes from those low rocky door frames?
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jdallen

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Re: Arctic Image of the Day
« Reply #346 on: August 04, 2014, 09:09:47 PM »
Looks like the profile on an old US Indian head penny.
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Bob Wallace

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Re: Arctic Image of the Day
« Reply #347 on: August 04, 2014, 09:29:03 PM »
We've drifted far off topic, but I'll add this as I step back onto the ice...

Head shaping has been done on all continents from time to time.  The Mayans and other Native American groups practiced it at times.

http://en.wikipedia.org/wiki/Artificial_cranial_deformation


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Re: Arctic Image of the Day
« Reply #348 on: August 06, 2014, 03:26:49 PM »
Some of the newer satellite digital elevation mapping brings in a whole new world of accuracy, allowing photorealistic perspective views among other things. Here is Isunnguata Sermia in southwestern Greenland: 1135 pixels wide.

gideonlow

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Re: Arctic Image of the Day
« Reply #349 on: August 07, 2014, 08:37:27 AM »
Very cool "wake" coming off Henrietta Island in this morning's Terra Modis: