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Author Topic: Jøkelbugt / North East Greenland  (Read 52856 times)

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #50 on: August 23, 2013, 11:23:15 AM »
The last remaining fast ice island in North East Greenland is dividing again:
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #51 on: August 23, 2013, 11:38:34 AM »
Left Fast Ice compared to 2012:
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #52 on: August 30, 2013, 08:20:28 PM »
Fast ice update, remember this is the last fast ice left on the entire coast of Eastern Greenland.
The green area shows what was left of fast ice after the "record" year 2012,  so somehow Jøkelbugt beats that, this melting activity is also seen at Zachariae Glacier.
The red shaded area shows what I think is still fast ice.
So if Buoy 2012M is sitting here she wont move for while?

Please click on image to enlarge and better details!
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Wipneus

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Re: Jøkelbugt / North East Greenland
« Reply #53 on: September 01, 2013, 09:06:38 AM »
As seen by the AMSR2 sensors, has the ice fasted on Belgica Bank broken up?

Jim Hunt

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Re: Jøkelbugt / North East Greenland
« Reply #54 on: September 01, 2013, 12:43:10 PM »
It seems ice mass balance buoy 2012M has "broken up" as well. The web page still says "All sensors OK" but no new data has arrived since August 28th. As seen by Terra:
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #55 on: September 06, 2013, 09:10:45 AM »
I have produced an animation about "The  untouchable" Fast Ice of Jøklebugt.

Due to the size of the file it is located at Google:

https://docs.google.com/file/d/0B_a0Tecpig0jbGl6YWkxZkYxeFU/edit?usp=sharing
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Neven

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Re: Jøkelbugt / North East Greenland
« Reply #56 on: October 04, 2013, 07:05:44 PM »
Spam removed, thanks everyone.
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Andreas T

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Re: Jøkelbugt / North East Greenland
« Reply #57 on: October 18, 2013, 08:59:47 PM »
some clear sky today and yesterday allows a glimpse of the ice coming south from Fram Strait. Can the size and structure of floes give some idea of thickness? Is that old ice?
http://rapidfire.sci.gsfc.nasa.gov/cgi-bin/imagery/single.cgi?image=crefl1_143.A2013291130000-2013291130500.250m.jpg
http://rapidfire.sci.gsfc.nasa.gov/cgi-bin/imagery/single.cgi?image=crefl1_143.A2013290135500-2013290140000.250m.jpg

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #58 on: October 18, 2013, 09:25:00 PM »
It looks like newly formed sea ice to me, especially due to the ice-contrails.
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Andreas T

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Re: Jøkelbugt / North East Greenland
« Reply #59 on: October 19, 2013, 01:20:59 AM »
from the drift vectors here http://www7320.nrlssc.navy.mil/hycomARC/navo/arcticicespddrf_nowcast_anim30d.gif
I thought some of the large chunks, which don't have sheared and shattered as much in collisions as others, could have been swept from the area north of greenland where NSIDC shows old ice http://nsidc.org/arcticseaicenews/
What I'd realy like to see is an updated version of this: http://www.youtube.comLoss of multi-year Arctic sea ice, 1987-present 

edit: Laurent kindly provides a better link in the following comment
« Last Edit: October 19, 2013, 12:09:29 PM by Andreas T »

Laurent

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Re: Jøkelbugt / North East Greenland
« Reply #60 on: October 19, 2013, 11:19:26 AM »
Better like that !?

Andreas T

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Re: Jøkelbugt / North East Greenland
« Reply #61 on: October 19, 2013, 12:32:57 PM »
Thanks Laurent, for a working link :-[
I'd love to see how 2013 looks in this. By looking at MODIS I am trying to get a "feel" what those light coloured bits in the animation look like. Maybe that is naive? Great images anyway, those swirls of icy slush (in 250m pixels!) and huge slabs crunching into each other while thin ice is forming in the gaps. Somebody has called rapidfire MODIS addictive, I am hooked! Pity the North is now getting dark.

Jim Hunt

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Re: Jøkelbugt / North East Greenland
« Reply #62 on: October 19, 2013, 04:40:16 PM »
Somebody has called rapidfire MODIS addictive, I am hooked! Pity the North is now getting dark.

You could always turn to the NOAA AVHRR images available via DMI:

http://ocean.dmi.dk/arctic/joekelbugt.uk.php
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #63 on: March 29, 2014, 07:10:39 PM »
First signs of melting activity seen in the Jøkelbugt area, it is the outlet from Sanddal valley/ river:

Please click on image to enlarge!
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Sonia

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Re: Jøkelbugt / North East Greenland
« Reply #64 on: March 29, 2014, 08:27:43 PM »
What sharp eyes you have!  Nice image, nice observation.  Where could the heat come from to melt the river?  It doesn't seem the weather has been warm enough.  Is it geothermal?

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #65 on: March 29, 2014, 09:17:42 PM »
Sonia;

To be honest I don't know what is the cause, maybe  a mix of snow/ice combined with sand and the sun (absorption) is a reason for the early melt?

*) The place Sanddal is infested with sand.
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #66 on: March 29, 2014, 09:27:19 PM »
Here is a Landsat image from March 24 2014, showing the sand delta from Sanddal, maybe we can ask Wipneus converting this image into natural colors?
« Last Edit: March 29, 2014, 09:49:32 PM by Espen »
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Wipneus

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Re: Jøkelbugt / North East Greenland
« Reply #67 on: March 30, 2014, 12:43:06 PM »
I will later. For now here is an image on March 28, you need to look through the clouds to see the mud plain from Sand Valley.

Notice the "worms" in the ice to the left.

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Re: Jøkelbugt / North East Greenland
« Reply #68 on: March 30, 2014, 01:36:36 PM »
Thanks Wipneus ;)

The natural color image shows the sand delta of Sanddal (Sand Valley).
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Wipneus

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Re: Jøkelbugt / North East Greenland
« Reply #69 on: March 30, 2014, 03:37:51 PM »
Hi-res 15m image of Sand Valley, North East Greenland.

(that is when you click, otherwise the picture is only so-so)

Shared Humanity

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Re: Jøkelbugt / North East Greenland
« Reply #70 on: March 30, 2014, 04:47:16 PM »
First signs of melting activity seen in the Jøkelbugt area, it is the outlet from Sanddal valley/ river:

This area of Greenland has seen increasing melt and mass loss for the last decade. I believe some of this melt is reaching the base of the ice sheet. When you said "river" you hit on why melt is occurring here. All of the major glaciers are, in fact, frozen rivers. As more and more melt occurs and some of that melt reaches the base of the ice sheet, we will see more behavior that looks like the behavior of a river.

While Humboldt Glacier is slow moving, there are huge meltwater pulses that cause a great deal of silt to enter the sea, exactly how any river builds a delta. Are we seeing silt enter the sea at Sanddal?


Espen

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Re: Jøkelbugt / North East Greenland
« Reply #71 on: March 30, 2014, 05:53:06 PM »
Hi-res 15m image of Sand Valley, North East Greenland.

(that is when you click, otherwise the picture is only so-so)

Wipneus,

We better keep an eye on this whole area during the season, and we are in a much better position to do so with Landsat 8, than earlier years.
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #72 on: June 14, 2014, 06:58:30 PM »
Our friend Andreas Muenchow and Polarstern is now just off the coast of Isle de France (Jøkelbugt/North East Greenland):

http://sailwx.info/shiptrack/shipposition.phtml?call=DBLK
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Andreas T

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Re: Jøkelbugt / North East Greenland
« Reply #73 on: June 15, 2014, 03:46:01 PM »
edit
having had a look at the actual geography, I realize that I had wrongly assumed to see melt in sea ice. Look at an image from August https://earthdata.nasa.gov/labs/worldview/?switch=arctic&products=baselayers,!MODIS_Aqua_CorrectedReflectance_TrueColor,MODIS_Terra_CorrectedReflectance_TrueColor~overlays,arctic_graticule_3413&time=2013-08-15&map=413465.727437,-1249646.62771,675609.727437,-1128046.62771
oddly today's image shows ice or snow where march showed water(?)
https://earthdata.nasa.gov/labs/worldview/?switch=arctic&products=baselayers,!MODIS_Aqua_CorrectedReflectance_TrueColor,MODIS_Terra_CorrectedReflectance_TrueColor~overlays,arctic_graticule_3413&time=2014-06-15&map=413465.727437,-1249646.62771,675609.727437,-1128046.62771
also compare with 15 june 2013, more bare rock and ice last year.
my original comment:
Sorry for not giving references, but I recall seeing vertical temperature profiles of the icesheet which show that near the coast the lower part of the ice (where seasonal temperatures at the surface have no influence) is at melting point temperature all year round. This is also shown by the fact that there is water flowing out from under the ice. I guess that this water originates from the surface (in the summer) but takes some time to reach the edge of the ice sheet. Of course this water could not melt (freshwater) ice without being warmer than melting point, and would have lost that heat while flowing through the ice. Could it melt sea ice by mixing with sea water (adding salinity without much cooling)? There also was a mention somewhere that this water has some heat input from converting kinetic energy, although I would expect much of this to be lost to surrounding ice on its way down from the ice surface. May be the negative expansion coefficient (making freshwater most dense at 4deg C) allows water of slightly above melting point temperature to flow underneath the ice.
 
« Last Edit: June 15, 2014, 10:18:04 PM by Andreas T »

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #74 on: July 24, 2014, 01:58:40 PM »
Final phase of the disintegration of sea ice in front of Jøkelbugt and Dove Bugt is now in full swing:
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Espen

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Re: Jøkelbugt / North East Greenland
« Reply #75 on: August 14, 2014, 09:10:29 PM »
Today's images from Modis:

The big question will Belgiske Banke survive?
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Re: Jøkelbugt / North East Greenland
« Reply #76 on: August 14, 2014, 10:23:53 PM »
lt WILL go, 99% sure! The ice at the northeastern coast of Greenland is breaking fast the last days, and east of the remaining fastice there's barely ice in the sea, just "Soup"!

A just as big question is if the ice further North, in the Simon Sea/fjords, will be flushed due to the fact that the icecork outside the fjord is now blowing away from the coast?!
My fancy for ice & glaciers started in 1995:-).

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #77 on: August 15, 2014, 12:16:11 PM »
Lots of action in and around Jøkelbugt:
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Shared Humanity

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Re: Jøkelbugt / North East Greenland
« Reply #78 on: August 15, 2014, 02:22:52 PM »
This area is FYI, right?

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #79 on: August 15, 2014, 04:19:56 PM »
This area is FYI, right?

Yes, 99%, just a fraction was left from last season in the middle, not along the coast.
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Andreas T

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Re: Jøkelbugt / North East Greenland
« Reply #80 on: August 15, 2014, 11:13:38 PM »
i think that some of it is ice which drifted there from up north and froze together in October but other parts kept breaking open and formed new ice as late as December. This explains differences in break up now and appearence earlier. The ice which formed later would have had less snow cover wich did melt sooner.
This is an IR image from 2.Dec 2013 http://ocean.dmi.dk/arctic/images/MODIS/Joekelbugt/201312020601.NOAA.jpg

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Re: Jøkelbugt / North East Greenland
« Reply #81 on: August 31, 2014, 12:53:18 PM »
The Untouchable seems to survive another year, this little fast ice island (off-shore) was the only fast ice that survived along the whole north east coast of Greenland  in the melting season of 2013, the "island" is marked with a * :
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Shared Humanity

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Re: Jøkelbugt / North East Greenland
« Reply #82 on: August 31, 2014, 02:39:35 PM »
Can you please explain that. Is there a small island there?

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #83 on: August 31, 2014, 08:06:58 PM »
Can you please explain that. Is there a small island there?

Shared Humanity,
No it is not a real island, but a piece of sea ice or more likely former glacier ice, and be because of the shallow water in the area it is somehow grounded there.
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Sonia

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Re: Jøkelbugt / North East Greenland
« Reply #84 on: September 18, 2014, 10:22:42 PM »
Nice clear view of the Belgica Bank today.  Quite a bit of ice is still holding fast!

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #85 on: September 19, 2014, 06:59:03 PM »
Hello Sonia,

The Belgica Bank survived, on a larger scale than I expected and "The Untouchable" is still there!
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Wipneus

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Re: Jøkelbugt / North East Greenland
« Reply #86 on: April 15, 2015, 07:58:29 AM »
Some of the sea ice in front of Jøkelbugt has broken of. Early?

(pls click to animate)

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #87 on: April 16, 2015, 08:42:04 PM »
Some of the sea ice in front of Jøkelbugt has broken of. Early?

(pls click to animate)

Yeas at many points we are closer to the coast than recent earlier years.
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Neven

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Re: Jøkelbugt / North East Greenland
« Reply #88 on: April 16, 2015, 11:46:26 PM »
That looks interesting...
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Re: Jøkelbugt / North East Greenland
« Reply #89 on: April 20, 2015, 09:01:22 AM »
More ice breaking off.

Espen

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Re: Jøkelbugt / North East Greenland
« Reply #90 on: August 21, 2015, 06:41:41 PM »
The "fast" ice off Jøkelbugt is really getting a punch at the moment:
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Wipneus

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Re: Jøkelbugt / North East Greenland
« Reply #91 on: September 04, 2015, 08:33:57 AM »
That fast ice is still hanging around, due to almost total absence of movements in the Fram, although most of it is not so "fast" anymore.

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Re: Jøkelbugt / North East Greenland
« Reply #92 on: September 23, 2015, 08:25:00 AM »
A giant slab of formerly fast ice is sliding southward.

(click!)

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Re: Jøkelbugt / North East Greenland
« Reply #93 on: July 31, 2016, 05:43:26 PM »
Sequence made from Terra/MODIS images of 29,30 and 31th of July. The former fast ice is now moving counter-current between the main land and a piece of fast ice grounded on Belgica Bank (if I am not mistaken).

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Re: Jøkelbugt / North East Greenland
« Reply #94 on: August 03, 2016, 08:58:21 PM »
I don't have the skill to make an animated sequence but toggling between the last 4 days on worldview shows a dramatic lunge eastwards in the icebergs calved from Zachariae over the last few years and also further south east where an opening starts to be made between the islands which have held the older melange in place since 2013.
try it for yourself at
http://go.nasa.gov/2aNM5uy
This could be another year of open water at the calving front.

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Re: Jøkelbugt / North East Greenland
« Reply #95 on: August 19, 2016, 09:45:21 PM »
Polarstern is taking profiles along the top of belgica bank it seems. Pity there are no current reports from the ship.

Air and water temperatures are here http://www.sailwx.info/shiptrack/shipposition.phtml?call=DBLK

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Re: Jøkelbugt / North East Greenland
« Reply #96 on: August 20, 2016, 10:44:42 PM »
This place keeps surprising again and again this year. Some places are moving back and forth while other place move  forth and back (in antiphase ). When not much seems to be changing suddenly another part of ice gets going. 
at the southern end of Joekelbugt  there is this plume of sediment laden water which flips north and south quite dramatically when there seems to be little reason for water moving along the coast which I find quite intriguing. Where is this stuff coming from? is there more of this coming out under the calving front?

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Re: Jøkelbugt / North East Greenland
« Reply #97 on: August 20, 2016, 11:09:43 PM »
They're not huge, maybe 1m, but the tides are peaking just now.
http://www.tide-forecast.com/locations/Cape-Borgen-Greenland/tides/latest this is from a couple of degrees south

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Re: Jøkelbugt / North East Greenland
« Reply #98 on: September 05, 2019, 12:10:47 PM »
This is something that doesn't happen often, but within hours from now the real fast ice in Jøkelbugt will be gone: Fast ice is becomming very rare in and around Greenland, the only fast ice left, to speak about is in the mouth of the Independence Fjord system.

Fast ice is sea ice that is more than one season old!
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Re: Jøkelbugt / North East Greenland
« Reply #99 on: September 05, 2019, 05:43:07 PM »
Espen, is there a name for landfast ice younger than that?
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