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Espen

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Re: Arctic Image of the Day
« Reply #100 on: August 29, 2013, 02:47:40 PM »
Found this turquoise, on my way:

Please click on image to enlarge.
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Pmt111500

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Re: Arctic Image of the Day
« Reply #101 on: August 29, 2013, 08:08:09 PM »
Yes, that's about too beautiful to confine Andres Breivik. :-|
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Espen

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Re: Arctic Image of the Day
« Reply #102 on: August 30, 2013, 10:33:59 AM »
A nice video about naming storms:

Please click at point below (�n).
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iwantatr8

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Re: Arctic Image of the Day
« Reply #103 on: September 04, 2013, 07:56:27 AM »
Quite liking this intriguing hole in the clouds today




jdallen

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Re: Arctic Image of the Day
« Reply #104 on: September 04, 2013, 08:35:19 AM »
Quite liking this intriguing hole in the clouds today

[Raises skeptical eyebrow]

Lance-Modis frame and date?
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Neven

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Re: Arctic Image of the Day
« Reply #105 on: September 04, 2013, 08:55:50 AM »
Nice!
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iwantatr8

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Re: Arctic Image of the Day
« Reply #106 on: September 04, 2013, 11:54:33 AM »
Quite liking this intriguing hole in the clouds today

[Raises skeptical eyebrow]

Lance-Modis frame and date?

Find it here:
http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r05c03.2013246.terra.250m

Bottom right corner.

seattlerocks

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Re: Arctic Image of the Day
« Reply #107 on: September 04, 2013, 03:53:12 PM »
It seems real, see the rounded shape of the shadow border over the ice.
Maybe an air jet through the clouds did that? But what caused the jet??

weatherintel

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Re: Arctic Image of the Day
« Reply #108 on: September 04, 2013, 04:47:37 PM »
These 'punch' holes are normally caused by military A/C during rapid ascent - tho there may be something else going on here that I have not come across before.
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Atomant

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Re: Arctic Image of the Day
« Reply #109 on: September 04, 2013, 07:23:51 PM »
You beat me to it! *note to self- must come to the forum more often

As well as the Punch hole  there are 2 intriguing small vortices nearby. They are odd because of their size. A person standing under the smaller vortex would have seen a cloud spiral above him/her. Is this normal in the Arctic?

jdallen

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Re: Arctic Image of the Day
« Reply #110 on: September 04, 2013, 07:58:17 PM »
You beat me to it! *note to self- must come to the forum more often

As well as the Punch hole  there are 2 intriguing small vortices nearby. They are odd because of their size. A person standing under the smaller vortex would have seen a cloud spiral above him/her. Is this normal in the Arctic?

That is just weird.  The hole is entirely to regular, and looks to be tens of KM wide.  There is a visible spiral curling into it if you look closely.  I wish I could see the winds.  The only analog I come up with is the eye of a storm... I think it is far too large and regular for a MA punch hole.
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Vergent

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Re: Arctic Image of the Day
« Reply #111 on: September 04, 2013, 09:19:00 PM »
Possibly caused by a meteor strike. There is what looks like the shadow of a contrail nearby.

Vergent

ChrisReynolds

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Re: Arctic Image of the Day
« Reply #112 on: September 04, 2013, 09:29:19 PM »
I find it really hard to work out where land and islands are on these plots. But above* the hole is what looks like a Von Karman vortex chain.
http://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_vortex_street

Taking image saturation right up in 367 bands shows what looks like an open vortex (one swirl above the hole) covered by thin higher cloud.

I suspect it's due to turbulence from a Von Karman chain (which apparently is called a 'street') due to the New Siberian Islands. Someone with better knowledge of the geography of these grid boxes will be able to correct me if those islands are in totally the wrong place.

* by 'above' I mean scroll upwards from the hole.

ChrisReynolds

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Re: Arctic Image of the Day
« Reply #113 on: September 04, 2013, 09:45:58 PM »
Fairly sure I'm right now.

From WetterZentrale:
http://www.wetterzentrale.de/topkarten/fsavnnh.html



High and low pressure form a dipole flow, the day before isobars constricted over the islands, the dipole flow has carried the turbulent air into that region.

ivica

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Re: Arctic Image of the Day
« Reply #114 on: September 04, 2013, 10:00:23 PM »
Possibly caused by a meteor strike. There is what looks like the shadow of a contrail nearby.

Vergent

Meteorites are around, one passed above my location a hour ago.
How large meteorite should be to make such a hole of several km in diameter ?
Too big to pass unnoticed by astronomers I guess.

Chris's idea seems more likely to me.

slow wing

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Re: Arctic Image of the Day
« Reply #115 on: September 05, 2013, 12:24:20 AM »
Spectacular image! And a very nice explanation, Chris.

Vergent

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Re: Arctic Image of the Day
« Reply #116 on: September 05, 2013, 01:18:33 AM »
Possibly caused by a meteor strike. There is what looks like the shadow of a contrail nearby.

Vergent

Meteorites are around, one passed above my location a hour ago.
How large meteorite should be to make such a hole of several km in diameter ?
Too big to pass unnoticed by astronomers I guess.

Chris's idea seems more likely to me.

It would be the supersonic shock wave, not the meteor itself. But, there is a better explination. it is a fallstreak hole.

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

They can be caused by ice crystals from the contrail of a passing airplane. Its kind of a chain reaction caused by the latent heat of freezing evaporating condensed water.

Vergent

seattlerocks

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Re: Arctic Image of the Day
« Reply #117 on: September 06, 2013, 07:48:33 PM »
I didn't really understand your karman vortices explanation, Chris, but I just found this picture of cloud "punch holes". Wow

http://goo.gl/xeiBWG

Espen

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Re: Arctic Image of the Day
« Reply #118 on: September 06, 2013, 09:08:18 PM »
Our PII-2012 is now released, into the wild world down south:
Have a ice day!

ChrisReynolds

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Re: Arctic Image of the Day
« Reply #119 on: September 07, 2013, 07:13:52 AM »
I didn't really understand your karman vortices explanation, Chris, but I just found this picture of cloud "punch holes". Wow

http://goo.gl/xeiBWG

If the air flow is across a flat surface (like the ocean) it flows straight. Put an island in the way and the wind 'whips' around the island which creates turbulence in the atmosphere downstream o
of the island. Those punch holes are exactly what I think the hole we saw in the MODIS images was.

Pmt111500

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Re: Arctic Image of the Day
« Reply #120 on: September 10, 2013, 05:20:19 AM »
section of the Greenland today cumulative meltdays map until Sept-8th (NSDIC/Thomas Mote/University of Georgia), tried to make the scale all red, but aha, the original scale shows in the edges of the tetris blocks.
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jdallen

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Re: Arctic Image of the Day
« Reply #121 on: September 10, 2013, 05:01:27 PM »
section of the Greenland today cumulative meltdays map until Sept-8th (NSDIC/Thomas Mote/University of Georgia), tried to make the scale all red, but aha, the original scale shows in the edges of the tetris blocks.

Actually... It kinda works...
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Shared Humanity

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Re: Arctic Image of the Day
« Reply #122 on: September 10, 2013, 05:46:50 PM »
section of the Greenland today cumulative meltdays map until Sept-8th (NSDIC/Thomas Mote/University of Georgia), tried to make the scale all red, but aha, the original scale shows in the edges of the tetris blocks.

Could you show northeast Greenland where a lot of interesting fast ice activity is occurring?

Pmt111500

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Re: Arctic Image of the Day
« Reply #123 on: September 10, 2013, 06:43:07 PM »
Could you show northeast Greenland where a lot of interesting fast ice activity is occurring?

Sorry, didn't save the whole image.
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jdallen

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Re: Arctic Image of the Day
« Reply #124 on: September 10, 2013, 07:25:05 PM »
Could you show northeast Greenland where a lot of interesting fast ice activity is occurring?

Sorry, didn't save the whole image.

I think if you snoop through Lance Modis  looking for cloud free images, you'll find there is precious little fast ice left. A few samples:

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013249.terra.1km

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013252.terra.1km

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013252.terra.367.250m.jpg&vectors=coast
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Shared Humanity

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Re: Arctic Image of the Day
« Reply #125 on: September 10, 2013, 11:36:58 PM »
Could you show northeast Greenland where a lot of interesting fast ice activity is occurring?

Sorry, didn't save the whole image.

I think if you snoop through Lance Modis  looking for cloud free images, you'll find there is precious little fast ice left. A few samples:

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013249.terra.1km

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013252.terra.1km

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013252.terra.367.250m.jpg&vectors=coast

jdallen..........I've been following your many posts this summer on the loss of fast ice. I was just curious what the land melt looked like in this area of Greenland as well. Does it show an increasing number of days of land melt?

Pmt111500

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Re: Arctic Image of the Day
« Reply #126 on: September 11, 2013, 07:49:35 AM »
Here you go (original by NSDIC/Thomas Mote/University of Georgia), apparently the daily map has dark squares that are not on the scale, I'll presume these would be the squares having most melt days.
« Last Edit: September 13, 2013, 07:43:25 AM by Pmt111500 »
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Shared Humanity

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Re: Arctic Image of the Day
« Reply #127 on: September 11, 2013, 02:07:56 PM »
Here you go, apparently the daily map has dark squares that are not on the scale, I'll presume these would be the squares having most melt days.

Thanks.

iamlsd

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Re: Arctic Image of the Day
« Reply #128 on: September 13, 2013, 04:05:42 AM »
1st post from long time lurker - NSIDC closed

Jim Hunt

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Re: Arctic Image of the Day
« Reply #129 on: September 13, 2013, 04:06:55 PM »
NSIDC closed

It was closed yesterday also. For more on the reasons why, including an animated "atmospheric river", see:

http://econnexus.org/biblical-floods-in-boulder-close-nsidc/
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Espen

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Re: Arctic Image of the Day
« Reply #130 on: September 17, 2013, 03:07:04 PM »
Winter is coming to Kimmirut:
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Jim Hunt

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Re: Arctic Image of the Day
« Reply #131 on: September 21, 2013, 07:58:04 PM »
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

diablobanquisa

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Re: Arctic Image of the Day
« Reply #132 on: September 22, 2013, 12:03:23 AM »
A ship near the NP2? Or what is that?
(Click the image for a larger version)




« Last Edit: September 22, 2013, 12:09:58 AM by diablobanquisa »

Jim Hunt

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Re: Arctic Image of the Day
« Reply #133 on: September 22, 2013, 12:34:40 AM »
A ship near the NP2? Or what is that?

It looks a lot like an icebreaker to me!
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

slow wing

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Re: Arctic Image of the Day
« Reply #134 on: September 22, 2013, 01:20:13 AM »
It appears to have a whole lot of jagged features, like roots.


My guess is that a polar bear has dragged a tree stump into the Arctic and placed it in front of the cam...  :o



slow wing

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Re: Arctic Image of the Day
« Reply #135 on: September 22, 2013, 01:33:47 AM »
A ten minute span between images and it hasn't moved a jot...






Yep, presumably Jim is right and it is an ice breaker. Some ice blots on the lens appear to have partly disguised its profile.

Nice spot!

Neven

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Re: Arctic Image of the Day
« Reply #136 on: September 22, 2013, 12:23:47 PM »
I think it's Godzilla's head.  ;)
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Jim Hunt

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Re: Arctic Image of the Day
« Reply #137 on: September 22, 2013, 01:25:22 PM »
No more images since then. Perhaps Godzilla ate the cam?
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Espen

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Re: Arctic Image of the Day
« Reply #138 on: September 30, 2013, 06:35:46 PM »
"Stars" over Scoresbysund, East Greenland:

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Jim Hunt

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Re: Arctic Image of the Day
« Reply #139 on: October 05, 2013, 04:15:37 PM »
The Lena delta and thereabouts refreezing. Courtesy of Aqua via Worldview:
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Laurent

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Re: Arctic Image of the Day
« Reply #140 on: October 07, 2013, 02:31:17 PM »
A new island on the coast of Pakistan since the 25 september !
 (2013 - CNES – Distribution Astrium Services / Spot Image)

Pmt111500

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Re: Arctic Image of the Day
« Reply #141 on: October 12, 2013, 02:52:24 PM »
http://stratus.ssec.wisc.edu/products/rtpolarwinds/ day 285 most images stacked to get some view of the arctic. didn't bother to try to get the wind markers out, to honor republican shutdown of NASA sites and EPA.
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Pmt111500

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Re: Arctic Image of the Day
« Reply #142 on: October 12, 2013, 03:04:14 PM »
http://www.sat.dundee.ac.uk/ might provide some images. I haven't registered yet though.
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pikaia

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Re: Arctic Image of the Day
« Reply #143 on: October 14, 2013, 01:12:54 AM »


Kronebreen, the fastest-flowing glacier on Spitsbergen, with radar images taken 11 days apart.
http://www.bbc.co.uk/news/uk-wales-24511764

Pmt111500

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Re: Arctic Image of the Day
« Reply #144 on: October 15, 2013, 05:02:04 PM »
While not strictly only an arctic species, this might do as a response to "cycles" that are only statistically proven, they seem to have decided to gather here just before migration. "oh, geese". Branta leucopsis, Mare Balticum (11.10.2013) Shown possibly  is  also one B. ruficollis, but I didn't find it in here nor in the other two similarly sized flocks residing nearby.
« Last Edit: October 15, 2013, 05:09:32 PM by Pmt111500 »
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Laurent

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Re: Arctic Image of the Day
« Reply #145 on: October 18, 2013, 01:29:14 PM »
"The water bear" by Paul Souders (United States)

The fact that most of the pictures show the polar bear on land or on ice tells us more about the practical difficulties encountered by humans for the photograph on the behavior of the mammal. In fact, it spends a lot of time in the water and can swim for hours. To correct this bias, Paul Souders followed a three-day bear in Hudson Bay before capture its passage under the ice.

from (french) : http://www.lemonde.fr/planete/portfolio/2013/10/17/l-essence-des-elephants-meilleure-photo-animale-de-l-annee_3497282_3244.html

Espen

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Re: Arctic Image of the Day
« Reply #146 on: October 18, 2013, 01:39:16 PM »
Great image Laurent! ;)
Have a ice day!

lanevn

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Re: Arctic Image of the Day
« Reply #147 on: October 29, 2013, 12:35:36 PM »
Can you give link to a most precise satellite arctic map?

anonymous

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Re: Arctic Image of the Day
« Reply #148 on: October 29, 2013, 01:26:34 PM »

lanevn

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Re: Arctic Image of the Day
« Reply #149 on: October 29, 2013, 01:40:59 PM »
Thanks a lot. One pixel is 250m?