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Author Topic: What the Buoys are telling  (Read 461082 times)

Dharma Rupa

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Re: What the Buoys are telling
« Reply #1800 on: August 23, 2017, 07:59:16 PM »
thanks, didn't know that,

to extend the question a bit, of course without questioning your reply as such, the ice-shelf that broke of in the antarctic is what then, a floe ?

i know its OT but i hope one more question is allowed since it originated on-topic and is just a side-question to further make use of the correct terms and since we're already at it, if an ice-floe ( thick one of course ) would brake loose and later would be sighted somewhere south of greenland from the bridge of a vessel, would there really be made a difference and that one floe would be called floe while all the bergs around it would be bergs ?

i hope it's not too much asked but i really wanna know once and for all :-)

I think the original objective was to distinguish the very hard very old ice from a glacier from the softer newer sea ice.  An ice shelf is more like a glacier in this regard.

A berg is much less likely to give way to even a steel boat than sea ice of the same size.


magnamentis

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Re: What the Buoys are telling
« Reply #1801 on: August 23, 2017, 08:13:03 PM »
Really big icebergs that break off ice sheets rather than glaciers are generally called "tabular icebergs", although the largest are sometimes called "ice islands".

great to get the picture finally, very much appreciated both replies @oren's and yours
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Jim Hunt

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Re: What the Buoys are telling
« Reply #1802 on: August 27, 2017, 06:53:07 PM »
Some wind is rippling the surface of the Northwest Passage.

P.S. Added the next snapshot too:
« Last Edit: August 27, 2017, 07:21:55 PM by Jim Hunt »
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Coffee Drinker

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Re: What the Buoys are telling
« Reply #1803 on: August 29, 2017, 08:24:47 AM »
Buoy 14

Melt ponds start to freeze over?

Andreas T

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Re: What the Buoys are telling
« Reply #1804 on: August 29, 2017, 11:09:53 PM »
There have been some low air temperatures, but the small pieces of ice are still the result of melting, enlarging brine channels are disintegrating icefloes, something which is usually seen in these late stages of bottom melt.

Jim Hunt

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Re: What the Buoys are telling
« Reply #1805 on: August 30, 2017, 12:07:22 AM »
The latest update from IMB buoy 2017B:

http://GreatWhiteCon.info/resources/ice-mass-balance-buoys/summer-2017-imb-buoys/#2017B

August 25th is the day before the buoy became "Free Floating":
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Jim Hunt

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Re: What the Buoys are telling
« Reply #1806 on: August 30, 2017, 12:49:30 AM »
The ripples are back:
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

uniquorn

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Re: What the Buoys are telling
« Reply #1807 on: August 30, 2017, 07:32:35 PM »
Maybe the buoy is doing a bit of icebreaking

Rob Dekker

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Re: What the Buoys are telling
« Reply #1808 on: August 31, 2017, 05:09:36 AM »
Right now there is a fight between bottom melt and top freeze.
Top freeze will win sometime in September, and that will define the minimum.

However, bottom melt is still going on across the Arctic, as witnessed (indirectly) by Warm Buoy 6 (now at  72.76N 147.28W) :



This shows that PAR irradiance that makes it through the ice has tapered off, but is still at some 10 W/m^2. That suggests full irradiance (energy that makes it under the ice) is now running at about 20 W/m^2, which, since most if not all of that goes to bottom-melt, represents about 0.5 cm/day of bottom melt.

With the thin ice floating around in the ice margin, that surely means that ice extent/area will continue to fall until atmospheric temps drop far enough below zero to stop it.


Coffee Drinker

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Re: What the Buoys are telling
« Reply #1809 on: September 03, 2017, 03:52:52 AM »
Look like it has been snowing:


Jim Hunt

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Re: What the Buoys are telling
« Reply #1810 on: September 03, 2017, 08:46:48 AM »
The WARM buoy pushpins have been updated. To my ageing eyes it looks like #6 is now free floating:

Reality is merely an illusion, albeit a very persistent one - Albert Einstein

magnamentis

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Re: What the Buoys are telling
« Reply #1811 on: September 03, 2017, 09:24:55 PM »
Look like it has been snowing:

true that ;)

when looking towards horizon in the pics taken by this buoy it often looks like a lot of open water while at least one side of the buys is heavily surrounded by persisting ice, the thought crossed my mind that the buoy may have it's own freezer on board ;) :)

just to make sure, i hope that everyone got it that i'm just kidding ;)
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oren

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Re: What the Buoys are telling
« Reply #1812 on: September 11, 2017, 11:00:51 PM »
A good word for O-buoy 14 - it survived another whole melting season. Maybe it felt it was the last of its breed.
The movie has been updated to Sep 8th. A lot of ice floating around, but there doesn't seem to be much or even any refreezing going on.
http://obuoy.datatransport.org/monitor#buoy14/movie

Apocalypse4Real

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Re: What the Buoys are telling
« Reply #1813 on: September 15, 2017, 01:40:23 PM »

oren

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Re: What the Buoys are telling
« Reply #1814 on: September 15, 2017, 02:28:09 PM »
US DOD is deploying new Arctic Ocean buoys as announced on Sept 13 2017.

See: https://www.defense.gov/News/Article/Article/1309969/navy-leads-international-effort-to-deploy-buoys-into-the-arctic-ocean/
Does anyone have any links to the data from these buoys?

ghoti

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Re: What the Buoys are telling
« Reply #1815 on: September 15, 2017, 05:02:59 PM »
They claim the data will be on the IABP site.

http://iabp.apl.washington.edu/maps_daily_table.html

I don't see them listed there yet. I also see that there were many buoys deployed in 2017 that are already dead and dozens from 2016 not reporting.