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Author Topic: Rift in Larsen C  (Read 48079 times)

Tor Bejnar

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Re: Rift in Larsen C
« Reply #200 on: July 24, 2017, 03:55:34 PM »
I figured out a fallacy in my July 14 post.  The relationship between Iceberg A68 and the remaining Larsen C Ice Shelf is not just a transverse fault, although it looks pretty much like one within the red oval.  The purple arrow pairs are collinear and equally gapped.  One set shows the actual relative movement, the other pair doesn't.  (Whereas the red pair of arrows shows actual relative movement.) (PolarView image from July 22.)

PS: the paper linked by this post may explain my July 14 behavior!
...
link
An excellent paper on how students in Earth and Atmospheric Sciences have difficulty in conceptualizing complex systems.
Students’ Understanding of Complex Dynamic Systems
« Last Edit: July 24, 2017, 04:09:54 PM by Tor Bejnar »
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johnm33

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Re: Rift in Larsen C
« Reply #201 on: July 24, 2017, 07:28:11 PM »
Tor that makes better sense, the tide arrives from the south and given the inertia of this block isn't going to push it north in a hurry, but something has to give so it begins to rotate.

Susan Anderson

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Re: Rift in Larsen C
« Reply #202 on: July 28, 2017, 08:21:44 AM »
Was just over at Earth Observatory where they used parallel parking as a metaphor.
https://earthobservatory.nasa.gov/ (main site because Hudson Bay ice is most recent fwiw)

https://earthobservatory.nasa.gov/IOTD/view.php?id=90627&eocn=home&eoci=iotd_grid
A Fracturing Berg in the Polar Night
“The back-and-forth movement of A-68 looks akin to maneuvering a parallel-parked car out of a tight parking space—like an Austin Powers three-point turn,” said Christopher Shuman, a cryospheric scientist at NASA’s Goddard Space Flight Center and the University of Maryland, Baltimore County.

Tor Bejnar

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Re: Rift in Larsen C
« Reply #203 on: July 28, 2017, 07:54:23 PM »
Nothing exceptional (per my eyes) re A68.  Here's a screen shot from yesterday's PolarView image. (click for larger view; use link for looking at details)
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Tor Bejnar

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Re: Rift in Larsen C
« Reply #204 on: July 31, 2017, 01:56:42 PM »
A68's northern mini-bergs from the July 30 PolarView image.  (The Polar View Antarctica page gives access to recent images.)
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AbruptSLR

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Re: Rift in Larsen C
« Reply #205 on: August 03, 2017, 02:08:44 AM »
With the cracks still spreading in the remaining Larsen-C Ice Shelf, the world (& satellites) will be watching to see how itself integrity holds-up:

Title: “Cracks are still spreading where that massive Antarctic iceberg broke free”

https://www.theverge.com/2017/8/2/16081998/ice-berg-larsen-c-ice-shelf-collapse-antarctica-climate-change

Extract: “Cracks continue to spread on the Antarctic ice shelf where a trillion-ton iceberg roughly the size of Delaware broke free in July, scientists say.”
“It is not the strongest or the most intelligent who will survive but those who can best manage change.”
― Leon C. Megginson

J Cartmill

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« Last Edit: August 06, 2017, 08:06:54 PM by J Cartmill »

Tor Bejnar

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Re: Rift in Larsen C
« Reply #207 on: August 06, 2017, 06:30:40 AM »
August 5 PolarView of the northern corner with the several 'little' icebergs with A68.

Also, fast ice, bergy bits and a gap between fast ice and new ice growing on A68 - near the southern end of A68.
« Last Edit: August 06, 2017, 06:36:41 AM by Tor Bejnar »
Arctic ice is healthy for children and other living things.