Liked

1

Antarctica / Re: Pine Island Glacier (PIG) Calving and Discussion

« on: December 02, 2020, 07:16:37 AM »

I'm mostly a longtime lurker here, but I must say the detailed analysis here is greatly helping my understanding of the dynamic forces at play.  It is apparent to me that as the main PIG has retreated, there is therefore less lateral or constraining forces on the adjacent ice sheets.   The lack of constraint combined with the difference in flow speed between adjacent ice streams is now causing them to  tear each other apart, thereby compounding the whole issue.  I'm sure this was obvious to others, but the clarity provided in the recent animations in how these mechanisms are working is fascinating, and somewhat terrifying.  Thank you everyone for the good work and intelligent conversation in here.   

4 Likes

2

Antarctica / Re: Ice Apocalypse - MULTIPLE METERS SEA LEVEL RISE

« on: September 10, 2020, 02:13:53 AM »

I agree over the long haul that forests have little affect on long term carbon.  In my forestry classes in University 30 years ago, as they explained the carbon cycle, professional foresters. were dubunking the concept of  forests as a carbon storage solution.   If you were to put a dome over a forest, over the life cycle of that forest, the net carbon input vs output is 0.  Yes, trees store carbon as they grow, in the form of wood, and leaves, and roots, and animal biomass.  As that biomass ages and dies, and decays, the leaves and trees and bark and wood, and animal carbon, is all consumed by insects, fungus, micro-organisms and fire, that carbon they consume is then released again, back into the atmosphere.   You can generate some medium term storage of the carbon by harvesting the forest, and storing the products as lumber and paper and stacking things up in libraries, but that too, eventually, will break down and be released as carbon again. The only long term land storage of carbon in a forest is in the peat bogs, which can also burn and decay on occasion.  But farming peat and long term conversion of peat to coals and other fossil fuels for long term storage is a separate discussion from forestry.   

2 Likes

3

Glaciers / Re: Canadian Glaciers

« on: July 07, 2020, 06:50:29 AM »

A short news article regarding the acceleration, retreat, and increased calving of the Trinity and Wykeham glaciers on the eastern side of Ellesmere Island.  The terminus of these glaciers is a fiord that empties into Pikialasorsuaq, the North Water Polynya—an area of year-round open water that’s the largest of its kind in the Arctic. 

In 2000, these two glaciers produced 22 per cent of all of the icebergs in the Canadian Arctic. By 2019, they produced 65 per cent. 

nunatsiaq.com/stories/article/glaciers-that-feed-the-north-water-polynya-are-rapidly-retreating/

1 Like

4

Arctic sea ice / Re: Temperatures at Eureka, Nunavut, Canada

« on: June 29, 2020, 04:35:29 AM »

An Image of the Eureka weather station. 

https://psl.noaa.gov/iasoa/sites/default/files/stations/eureka/eureka_site.jpg

Opal site.  https://www.candac.ca/candac/Facilities/facility.php?type=0PAL


An image of the PEARL site.

https://www.candac.ca/candac/Facilities/Images/PEARL4air1.jpg

3 Likes

5

Arctic sea ice / Re: Temperatures at Eureka, Nunavut, Canada

« on: June 29, 2020, 04:10:25 AM »

My understanding is the Environment Canada station is near the coast at 0 elevation.  The Airfield according to Nav Canada is at 83 meters (272 feet)

Then there is, PEARL,  the Polar Environment Atmospheric Research Laboratory (Canadian Network for Detection of Atmospheric Change).  PEARL has three sites: The PEARL Ridge Laboratory 15km from the Eureka weather station at 610m elevation, the 0PAL laboratory next to the weather station and the SAFIRE site which is far from structures for undisturbed measurements.  Couple of links.

https://www.candac.ca/candac/Data/PEARL_Weather/weather.php

http://cnnro.ca/polar-environment-atmospheric-research-laboratory-pearl/#:~:text=PEARL%20has%20three%20sites%3A%20The,from%20structures%20for%20undisturbed%20measurements.

3 Likes

6

Arctic sea ice / Re: The 2020 melting season

« on: May 22, 2020, 05:06:13 AM »

For some real time images of the snow in the CAA there are a few good cameras at Canadian airports on the Nav Canada WxCam site.     

https://www.metcam.navcanada.ca/hb/index.jsp?lang=e

3 Likes

7

Antarctica / Re: PIG has calved

« on: December 31, 2019, 11:36:06 PM »

I am enjoying the analysis and progress of the NIS and thinking it would become one of my regular go-to items.  However, I suggest the NIS should now have it's own thread and not be on the PIG thread as all they now share is past influence, and the bay.

1 Like

8

Arctic sea ice / Re: Arctic Image of the Day

« on: May 29, 2019, 02:25:20 AM »

Wasn't sure where to post this - For those looking for live images, Nav Canada has a site with Live weather cameras at a lot of Canadian airports.  Many of the cameras at northern Airports have a bit of the sea in the background.   

http://www.metcam.navcanada.ca/hb/index.jsp?lang=e

1 Like