The caa-greenland mega crack

[uniquorn]

"Should I stay or should I go now?"

Lift off in the Lincoln sea is almost complete.
https://go.nasa.gov/3zrPeKS  light contrast

[uniquorn]

awi sic, v106 of the same area, jul18-22

[uniquorn]

Crack at the edges, press in the middle.  Lift off north of Princesse Thyra
awi sic-leads v110, aug25-sep6

[uniquorn]

"Should I stay or should I go now?"

Lift off in the Lincoln sea is almost complete.
https://go.nasa.gov/3zrPeKS  light contrast

Most of this winter's NW Greenland fast ice now at the entrance to Nares Strait. A hint of low concentration sea ice NE of Kap Kane.

1. https://go.nasa.gov/3Lx1dLJ  aug14-sep21

2. sep21

3. awi sic-leads v110, ngreenland, sep17-21
 

[Glen Koehler]

     The animation showing progress of mega crack ice towards Nares much appreciated.  It has me wondering if the Greenland mega crack and open Nares have occurred simultaneously in the past, or is this a new functional feature of ASI export?  Or does it not matter because that big block is about to plug the Nares gate as winter refreeze gets underway?

[Niall Dollard]

Still much too early for any blockage of the Nares. The earliest blockage I can recall, occurred right after the year of lowest sea ice extent, on Nov 8th 2012.

[uniquorn]

Some last years fixed ice re-fixed just east of the entrance to the Nares. Yesterday it lifted off again. Unlikely that it will stay now.
awi sic-leads v110, oct26-30
https://go.nasa.gov/3WinQIQ

[uniquorn]

"Should I stay or should I go now?"

Lift off in the Lincoln sea is almost complete.
https://go.nasa.gov/3zrPeKS  light contrast

aaaannd.....it's gone.

https://go.nasa.gov/3G6mpY2  oct31-nov11

[HapHazard]

It's looks like it's opening up pretty good right now. Clouds obscuring a lot of it, but here's the progression of the last 3 days:

[uniquorn]

the crack is back.
sic-leads v110, dec1-4

[jdallen]

the crack is back.
sic-leads v110, dec1-4

Yeah, the reign of 10+m thick land-fast sea ice is now a fast fading memory.

[Ajpope85]

Is this crack widening during the freezing season usual? This seems extremely concerning to me but I don't know enough about it.

[johnm33]

Is this crack widening during the freezing season usual? This seems extremely concerning to me but I don't know enough about it.

Whilst the wind plays it's part imo it's facilitated by the movement of water beneath the ice. Imagine a wave in a wave tank arriving at one end, then shift that to the arctic basins, first it pushes up through the ice as it impacts the shelf and shore, then it forms a slope for the ice to move away from the land and it does it repeatedly until the energy is spent. The ocean was recently less mobile and the ice thicker so it's becoming more 'usual'.

[uniquorn]

Lift off of 15km over 8 days, winds mostly westerly or northwesterly. When enlarged some tidal movement is apparent, particularly north of Borden Is, probably not inertial oscillation this near the coast.

rammb, dec1-7

https://col.st/T5lLH
https://go.nasa.gov/3taIS29

[HapHazard]

The crack is crackin' again: