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Author Topic: Rift in Larsen C  (Read 80571 times)

johnm33

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Re: Rift in Larsen C
« Reply #300 on: May 18, 2018, 12:43:51 PM »
The point of contact has broken.

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johnm33

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Re: Rift in Larsen C
« Reply #301 on: May 26, 2018, 10:37:47 AM »
Nice shot of the continued break-up

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crandles

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Re: Rift in Larsen C
« Reply #302 on: July 09, 2018, 02:30:59 PM »
The 'monster' iceberg: What happened next?

https://www.bbc.co.uk/news/science-environment-44745734

Susan Anderson

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Re: Rift in Larsen C
« Reply #303 on: July 12, 2018, 08:36:15 PM »
The 'monster' iceberg: What happened next?

https://www.bbc.co.uk/news/science-environment-44745734

Thanks. Good informative article. This slightly off topic for here, but anyway: Antarctica's troublesome 'hairdryer winds' https://www.bbc.co.uk/news/science-environment-39759329
« Last Edit: July 12, 2018, 08:41:25 PM by Susan Anderson »

Susan Anderson

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Re: Rift in Larsen C
« Reply #304 on: July 19, 2018, 06:49:37 PM »
Earth Observatory put out a new article about A68:

Iceberg A-68A has moved a relatively short distance in the year since it calved from the Larsen C Ice Shelf: Iceberg A-68A has moved a relatively short distance in the year since it calved from the Larsen C Ice Shelf/b] https://earthobservatory.nasa.gov/images/92420/one-year-adrift-but-not-far



Quote
A-68A’s sluggishness is not surprising. When it calved, the berg was about the size of Delaware and weighed more than a trillion tons. Dense sea ice in the Weddell Sea has made it harder for currents, tides, and winds to move all of that mass. The iceberg has also become stuck at times when its north end encounters the shallow water near Bawden Ice Rise, an ice-covered rock outcrop.

Still, Iceberg A-68A has seen plenty of motion. Throughout the year, tide cycles have shuffled the berg back and forth like a driver trying to get out of a tight parallel-parking spot. Its north end has been repeatedly smashed against Bawden Ice Rise, fracturing and reshaping its northern edge. Also notice how the southeastern edge appears to have grown in area. This is not part of the original iceberg; it is fast ice that has come fastened to the edge of the berg as it shoves through the ice pack.

A-68A will continue this dance in moonlight, as the darkness of austral winter continues through early August. Thermal images ... an important tool for Adrian Luckman and the UK-based Project MIDAS, which has been monitoring the iceberg and how its calving affects the Larsen C Ice Shelf.

There’s no telling how much longer A-68A will stay “stuck” in the Weddell Sea. The smaller A-68B is a good example of the path taken by many Antarctic bergs, as they are carried by currents out of the Weddell and northward toward South Georgia and the South Sandwich Islands.

johnm33

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Re: Rift in Larsen C
« Reply #305 on: July 19, 2018, 11:19:58 PM »
It's actually rotated somewhat this month and is now more broadside on to the tides, i guess once the ice clears it could be moved north more rapidly.  In one of the recent shots from polarview it was hard against the shelf.


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