Support the Arctic Sea Ice Forum and Blog

Author Topic: Arctic Image of the Day  (Read 670585 times)

anonymous

  • Guest
Re: Arctic Image of the Day
« Reply #150 on: October 29, 2013, 04:35:39 PM »
Thanks a lot. One pixel is 250m?

Yes. 500m, 1km, 2km, 4km works too.

Andreas T

  • Nilas ice
  • Posts: 1143
    • View Profile
  • Liked: 17
  • Likes Given: 4
Re: Arctic Image of the Day
« Reply #151 on: October 29, 2013, 05:39:11 PM »
Is there a version which assembles cloud free images rather than images of a single day? I seem to remember seeing that posted.

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #152 on: October 31, 2013, 04:28:50 AM »
Andreas T "which assembles cloud free images ", those ones were done by a member of the site, assembling  photos obtained during a week or so... Then there has been a Canadian site that does this too, I don't know it's status now when the Visual Spectrum channel in the north is pretty much obscured by the earth's shadow. those were (if I remember correctly) on 1km resolution.
« Last Edit: October 31, 2013, 04:46:30 AM by Pmt111500 »

Jim Hunt

  • Young ice
  • Posts: 4744
  • Stay Home, Save Lives
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 507
  • Likes Given: 44
Re: Arctic Image of the Day
« Reply #153 on: October 31, 2013, 02:06:15 PM »
Is there a version which assembles cloud free images rather than images of a single day? I seem to remember seeing that posted.

See http://forum.arctic-sea-ice.net/index.php/topic,440 and http://www.arctic.io/clear-sky-zoom/

Now all we need is the AVHRR equivalent!
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

pikaia

  • Frazil ice
  • Posts: 332
    • View Profile
  • Liked: 66
  • Likes Given: 38
Re: Arctic Image of the Day
« Reply #154 on: October 31, 2013, 02:19:21 PM »
As it is Halloween, here is a scary radar image of the Icelandic volcano Eyjafjallajökull, erupting in 2010.


Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #155 on: October 31, 2013, 02:59:49 PM »
Pikaia,

Nice to see a real image again in this thread, nice catch! ;)
Have a ice day!

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 4110
    • View Profile
    • Arctische Pinguin
  • Liked: 821
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #156 on: November 06, 2013, 09:06:57 AM »
As discussed in the "NØIB (Norske Øer Ice Barrier)" thread, Landsat images are available in 15m resolution (panchromatic, or B&W visible color) and a number of 30m spectral bands.

I have combined the 30m visible color bands (Red,Green and Blue) with the 15m B&W image which produced a color image with 15m resolution. The result is (IMHO) spectacular, but unfortunately difficult to share as the full file size is about 740MB.

Attached is a part of the 79N glacier outlet, where the ice hits a small rock.
 

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #157 on: November 06, 2013, 09:34:30 AM »
Wipneus,

It is "almost" like being there, just fantastic´it is a paradigm shift, Image wise!! ;)
Have a ice day!

Jim Hunt

  • Young ice
  • Posts: 4744
  • Stay Home, Save Lives
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 507
  • Likes Given: 44
Re: Arctic Image of the Day
« Reply #158 on: November 06, 2013, 09:52:03 AM »
Stunning Wipneus! Thanks.

Does Landsat by any chance cover as far north as September's "Polar Polynya"?
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

ggelsrinc

  • Frazil ice
  • Posts: 437
    • View Profile
  • Liked: 1
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #159 on: November 06, 2013, 10:49:06 AM »
Bravo again, Wipneus! That area drains so much of Greenland, I hardly believed it, when I first heard about it. Much of GIS heads that way according to what I've researched. It makes me wonder though, if so much ice is transported to the north in Greenland, could it build up in a way to shift the tides and start carrying the ice to the south? It's just a question to think about and not something to personally try to answer. The physics of ice tells me it will flow according to the route offering least resistance. What if that route switches directions at times based on various possible mechanism?

I need to get back and do some homework of that area. It was more important than I thought examining the glacier.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 4110
    • View Profile
    • Arctische Pinguin
  • Liked: 821
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #160 on: November 06, 2013, 11:53:34 AM »

Does Landsat by any chance cover as far north as September's "Polar Polynya"?

I don't know. It is my intention to document the method in the Developers  Corner, but the first step would be to go to LandsatLook Viewer, learn how to use it and locate the cloudless image(s) that are of your interest.

For software I am using ImageMagick and the Gimp. Processing does require a PC that has at minumum a 64bit OS and 16GB RAM + infinite swap and disk space. I still have had two complete OS crashes during the experiments.

Jim Hunt

  • Young ice
  • Posts: 4744
  • Stay Home, Save Lives
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 507
  • Likes Given: 44
Re: Arctic Image of the Day
« Reply #161 on: November 06, 2013, 12:49:22 PM »
The first step would be to go to LandsatLook Viewer, learn how to use it and locate the cloudless image(s) that are of your interest.

Thanks Wipneus. I can see the , albeit not very clearly this year. I can even see Cape Fligely. Any further north seems to be just a big blank though :(
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 4110
    • View Profile
    • Arctische Pinguin
  • Liked: 821
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #162 on: November 06, 2013, 02:02:13 PM »
A pity Jim, it seems you don't even get to the most northern tip of Greenland this way.
 
It is probably the satellite orbit:



(google landsat maximum latitude)

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #163 on: November 06, 2013, 02:50:45 PM »
Jim and Wipneus,
Landsat only reaches to the top of Greenland (and just only).
Have a ice day!

Laurent

  • Young ice
  • Posts: 2538
    • View Profile
  • Liked: 6
  • Likes Given: 35
Re: Arctic Image of the Day
« Reply #164 on: December 05, 2013, 08:21:45 PM »
Guess what it is !

From a photographer called christian houge :
http://www.artistics.com/christian_houge

ritter

  • Grease ice
  • Posts: 547
    • View Profile
  • Liked: 8
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #165 on: December 05, 2013, 10:22:31 PM »
Seed vault.

Laurent

  • Young ice
  • Posts: 2538
    • View Profile
  • Liked: 6
  • Likes Given: 35
Re: Arctic Image of the Day
« Reply #166 on: December 05, 2013, 11:01:28 PM »
yep ! Monsanto, singenta, Bill gates...

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 4110
    • View Profile
    • Arctische Pinguin
  • Liked: 821
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #167 on: December 06, 2013, 03:59:25 PM »
I was wondering about the fate of the "goats head".
An animation from Jaxa's AMSR2 RGB images composed from the 36V,36H and 18V bands shows that  it has nor reappeared after the summer. As far as I can see the remnants are now clearly on the way to Fram Strait.

Because of size, it is on YouTube, let me see if that works.

The direct link is


jdallen

  • Young ice
  • Posts: 3248
    • View Profile
  • Liked: 525
  • Likes Given: 206
Re: Arctic Image of the Day
« Reply #168 on: December 06, 2013, 09:14:57 PM »
It's pretty clear to me the shattered remains are currently just WNW of Svalbard, motoring southward towards the gap at about 2 KM/hr.
This space for Rent.

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #169 on: December 12, 2013, 05:47:59 AM »
so not long before it's out and spreading in the North Atlantic.

Whit

  • New ice
  • Posts: 37
  • Standing in a river, waving a stick
    • View Profile
  • Liked: 0
  • Likes Given: 2
Re: Arctic Image of the Day
« Reply #170 on: December 12, 2013, 08:47:08 PM »
Not about ice, but still worth mentioning I think.

Nordic Nature Photographer of the Year also happens to be a professor in biology at the University of Tromsø. Dr. Audun Rikardsens research on salmon and arctic char has given us fascinating new insights like salmon diving to depths of 800 m and more off the west coast of Svalbard and arctic char heading into full salty sea-water at 2C. Stuff we didn't think was possible until Rikardsens team radio tagged a bunch of our finned friends ...

But his pictures ... oh man.

Have a look.

One of my favorites, arctic char in midnight sun, Spitsbergen:

Is it progress if a cannibal eats with a fork?

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #171 on: December 29, 2013, 04:08:38 AM »
and what is arctic, one definition could be this is an area where the average temperature is below zero. A quick modification on the wikipedia map on average temperatures (using 1961-1990 as a baseline) produced here, the averages of below -31C left unmodified since these are only seen in Antarctica. In WMO, I think there was tendency to use later baselines (even 1981-2010 might be used), but this is where subzero areas were approximately 25 years ago.

Too bad f.e. the scale at http://earthobservatory.nasa.gov/GlobalMaps/view.php?d1=MOD11C1_M_LSTDA is totally screwed up (f.e. spanning 200px and 70 deg to get a neat 28,57 px/10degrees, and the colors do not match the map), but meteorologists probably know where to get the proper current averages. How are the ameteurs supposed to use these??
[deleted second image since the scale isn't equally spaced in color space]
« Last Edit: December 29, 2013, 06:54:02 AM by Pmt111500 »

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 4110
    • View Profile
    • Arctische Pinguin
  • Liked: 821
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #172 on: December 29, 2013, 08:53:41 AM »
Too bad f.e. the scale at http://earthobservatory.nasa.gov/GlobalMaps/view.php?d1=MOD11C1_M_LSTDA is totally screwed up (f.e. spanning 200px and 70 deg to get a neat 28,57 px/10degrees, and the colors do not match the map),

I wonder, the NASA people at Earth Observatory do make efforts to effective use of colors in their images. See for instance the article series "subtleties of color", starting here

And the image you linked to, are daytime temperatures, perhaps that is reason for unexpected colors?

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #173 on: December 29, 2013, 01:15:58 PM »
Happy New Year 2014:

Please click on image to enlarge!

Have a ice day!

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #174 on: December 29, 2013, 10:58:33 PM »
Very nice, Espen!  :)
Il faut comparer, comparer, comparer, et cultiver notre jardin

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #175 on: December 30, 2013, 06:00:38 PM »
Very nice, Espen!  :)

Thank you Neven, and a Happy New Year to you and your family!!!!!! ;)
« Last Edit: December 30, 2013, 06:23:43 PM by Espen »
Have a ice day!

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #176 on: December 30, 2013, 08:51:33 PM »
Thank you Neven, and a Happy New Year to you and your family!!!!!! ;)

The same to you and yours, Espen.
Il faut comparer, comparer, comparer, et cultiver notre jardin

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #177 on: January 03, 2014, 02:44:18 PM »
Belated Happy New Year from me too. A small mystery image from 2014:

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #178 on: January 03, 2014, 06:49:19 PM »
A weak attempt: Lena Delta?
Il faut comparer, comparer, comparer, et cultiver notre jardin

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #179 on: January 03, 2014, 08:22:49 PM »
Another one from Sea of Okhotsk:

Please click on image to enlarge!
Have a ice day!

wili

  • Young ice
  • Posts: 3205
    • View Profile
  • Liked: 577
  • Likes Given: 387
Re: Arctic Image of the Day
« Reply #180 on: January 06, 2014, 03:06:28 AM »
IIRC, about this time of year last year, we were starting to notice how broken up the sea ice looked. How is it looking to folks now?
"A force de chercher de bonnes raisons, on en trouve; on les dit; et après on y tient, non pas tant parce qu'elles sont bonnes que pour ne pas se démentir." Choderlos de Laclos "You struggle to come up with some valid reasons, then cling to them, not because they're good, but just to not back down."

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #181 on: January 06, 2014, 11:22:40 AM »
The other day someone posted a radar image and there were a lot of cracks again in the Beaufort Sea, which is no wonder, as a huge high pressure area has been parked there for quite a while now.
Il faut comparer, comparer, comparer, et cultiver notre jardin

Gray-Wolf

  • Grease ice
  • Posts: 890
    • View Profile
  • Liked: 122
  • Likes Given: 319
Re: Arctic Image of the Day
« Reply #182 on: January 06, 2014, 01:36:35 PM »
Hi Neven! all the best for 2014!

I tend to look at ;

http://www.woksat.info/wos.html

for my peeps at the Arctic over winter dark. you either get the larger glimpses of Greenland/svalbard etc but a daily pole to Africa snap which allows a look at the basin. Beaufort does look like a gaint has stepped on it though.
KOYAANISQATSI

ko.yaa.nis.katsi (from the Hopi language), n. 1. crazy life. 2. life in turmoil. 3. life disintegrating. 4. life out of balance. 5. a state of life that calls for another way of living.
 
VIRESCIT VULNERE VIRTUS

wili

  • Young ice
  • Posts: 3205
    • View Profile
  • Liked: 577
  • Likes Given: 387
Re: Arctic Image of the Day
« Reply #183 on: January 06, 2014, 02:08:48 PM »
Thanks. I'm just trying to put together how much we could expect the New Arctic to affect weather patterns even in the winter. I would expect that a much more 'porous' ice pack could be letting more heat out even in the depths of winter that could affect everything from the Warm Arctic Cold Continents (WACC) pattern to polar cyclones to the apparent merger of the polar and mid-latitude jet streams. I can't remember whether there is some standard way to measure the number of leads and cracks, or if that would be the whole story anyway.
"A force de chercher de bonnes raisons, on en trouve; on les dit; et après on y tient, non pas tant parce qu'elles sont bonnes que pour ne pas se démentir." Choderlos de Laclos "You struggle to come up with some valid reasons, then cling to them, not because they're good, but just to not back down."

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #184 on: January 07, 2014, 04:58:19 AM »
The mystery image was from the shore of Hudson Bay, the dark stripes in the frigid landscade are presumably creek valleys with higher vegetation.

The channels 3, 6 and 7 images from the lance-modis have different resolutions, this might be a reason that many of the images get striping when looked at in extreme detail. Here I tried to remove the striping by appyling a slight motion blur in two directions to the full resolution image of Labrador N.Cape, resolution 1km/px. Other adjustments were also made to keep details visible. Below a detail of the full image (res 250m/px) that shows this procedure wasn't perfect. Additionally, as many of the images are composed of several overpasses by the satellite, the direction of the motion blur applied will be variable.

[modified:] Oops, location is http://en.wikipedia.org/wiki/Cape_Chidley not the Ungava peninsula which is the northest one here. [added an image of Hudson Bay coast to illustrate the striping between images from two overpasses]
« Last Edit: January 07, 2014, 06:02:31 AM by Pmt111500 »

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #185 on: January 07, 2014, 11:04:14 AM »
Quote
The mystery image was from the shore of Hudson Bay, the dark stripes in the frigid landscade are presumably creek valleys with higher vegetation.

Thanks, that was my second guess.  ;)
Il faut comparer, comparer, comparer, et cultiver notre jardin

Laurent

  • Young ice
  • Posts: 2538
    • View Profile
  • Liked: 6
  • Likes Given: 35
Re: Arctic Image of the Day
« Reply #186 on: January 13, 2014, 03:08:35 PM »
“Aurora over Saltfjellet” by Tommy Eliassen

Laurent

  • Young ice
  • Posts: 2538
    • View Profile
  • Liked: 6
  • Likes Given: 35
Re: Arctic Image of the Day
« Reply #187 on: January 18, 2014, 11:41:56 AM »
Fish traped by the ice in Norway (only -7,8°C)

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #188 on: January 18, 2014, 11:52:18 AM »
Wow, that's a big freezer!
Il faut comparer, comparer, comparer, et cultiver notre jardin

Pmt111500

  • Guest
Re: Arctic Image of the Day
« Reply #189 on: January 19, 2014, 08:32:59 AM »
shallower lakes have frozen thickly enough for some wintry activities in southern Finland:

Whit

  • New ice
  • Posts: 37
  • Standing in a river, waving a stick
    • View Profile
  • Liked: 0
  • Likes Given: 2
Re: Arctic Image of the Day
« Reply #190 on: January 23, 2014, 10:14:56 PM »
The ocean around Tromsø (69 N) in the north of Norway has been teeming with herring over the last few years. This attracts other species, especially larger predators. After the herring-populations increased the humpback-whales started to make extended feeding-stops in the fjords on their way from the Arctic Ocean to their breeding grounds in the Carribbean.

They tend to leave around the middle of January, and I was lucky to get a last look at them waving goodbye, for now.

The first image was shot with a wide angle lens, just to give you an idea of how close they got. At the same time two packs of killer-whales kept a more respectful distance. We had four of these 15 meter long 30-ton giants playing and showing off around our small RIB, at times so close that we could have touched them. We most certainly could smell them ...
Is it progress if a cannibal eats with a fork?

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #191 on: January 23, 2014, 10:34:06 PM »
Whit,

Takk for de flotte bildene ;)

Espen
Have a ice day!

Whit

  • New ice
  • Posts: 37
  • Standing in a river, waving a stick
    • View Profile
  • Liked: 0
  • Likes Given: 2
Re: Arctic Image of the Day
« Reply #192 on: January 23, 2014, 10:48:22 PM »
I lige måde, Espen :)
Is it progress if a cannibal eats with a fork?

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #193 on: January 23, 2014, 10:49:22 PM »
Quote
We most certainly could smell them ...

So, how did they smell?

Sorry, just curious.  :)
Il faut comparer, comparer, comparer, et cultiver notre jardin

Whit

  • New ice
  • Posts: 37
  • Standing in a river, waving a stick
    • View Profile
  • Liked: 0
  • Likes Given: 2
Re: Arctic Image of the Day
« Reply #194 on: January 23, 2014, 10:59:15 PM »
So, how did they smell?

Sorry, just curious.  :)
You smell their breath if you're downwind of them when they blow, and it's not really what you would expect from the scenery ... Imagine a really awkward moment in an elevator, amplified by a 30-ton herring-feeding machine ;)
Is it progress if a cannibal eats with a fork?

Espen

  • Young ice
  • Posts: 3295
    • View Profile
  • Liked: 204
  • Likes Given: 1
Re: Arctic Image of the Day
« Reply #195 on: January 23, 2014, 11:02:35 PM »
Or a Mama San in a tea house in old Hong Kong ;)
Have a ice day!

Neven

  • Administrator
  • First-year ice
  • Posts: 7756
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 1133
  • Likes Given: 521
Re: Arctic Image of the Day
« Reply #196 on: January 23, 2014, 11:28:43 PM »
Okay, enough. I'll pass, thank you.  ;D
Il faut comparer, comparer, comparer, et cultiver notre jardin

pikaia

  • Frazil ice
  • Posts: 332
    • View Profile
  • Liked: 66
  • Likes Given: 38
Re: Arctic Image of the Day
« Reply #197 on: January 24, 2014, 10:23:15 AM »
Atlantic walrus off the coast of Greenland. From National Geographic photo of the day.


diablobanquisa

  • Frazil ice
  • Posts: 123
    • View Profile
  • Liked: 6
  • Likes Given: 2
Re: Arctic Image of the Day
« Reply #198 on: February 12, 2014, 03:11:21 PM »
Sea ice today at St John's and surrounding areas (Newfoundland):





Locally formed new ice?


« Last Edit: February 12, 2014, 03:27:43 PM by diablobanquisa »

lanevn

  • New ice
  • Posts: 91
    • View Profile
  • Liked: 0
  • Likes Given: 0
Re: Arctic Image of the Day
« Reply #199 on: February 12, 2014, 07:47:47 PM »
Pictures from Franz-Josef Land. Not new, but scary anyway.
http://ru-abandoned.livejournal.com/1433930.html