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Messages - 1rover1

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1
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

2
Glaciers / Re: Canadian Glaciers
« on: April 12, 2018, 01:59:54 AM »
https://www.thestar.com/edmonton/2018/04/11/cool-find-u-of-a-student-discovers-lakes-under-700-metres-of-ice.html

Interesting article about a new find of a hypersaline subglacial lake under the Devon Ice Cap in Nunavut, Canada.

The full published article is here:

http://advances.sciencemag.org/content/4/4/eaar4353.full

3
Arctic sea ice / Re: The 2017 melting season
« on: August 16, 2017, 06:52:07 AM »
At risk of getting too far off topic, but noting the discussion of the Canadian wildfire smoke and trajectory, affecting melt, there is a website which forecasts hourly smoke levels in Canada based on the inputs of known fires, location, size, and weather.  Forecast does not extend all the way into the CAA, but some indication.

http://firesmoke.ca/forecasts/viewer/run/ops/BSC-CA-01/current/

Regarding the number of fires mentioned by Werther, Alberta has had a below average number of hectares burn this year (14,794 ha compared to 5 year average 294,000 ha).  Alberta sitrep here:  http://wildfire.alberta.ca/reports/sitrep.html

Somewhat more detailed, but here is Canada's national wildfire sitrep. http://www.ciffc.ca/firewire/current.php



4
Arctic sea ice / Re: What's new in the Arctic ?
« on: June 14, 2017, 09:32:53 PM »
Good question Mamooth. I just checked the Canadian Ice service report and they report the following in the Strait :  "Special ice warning in effect.  1 tenth of first-year ice including a trace of old ice. Unusual presence of sea ice."

https://weather.gc.ca/marine/forecast_e.html?mapID=14&siteID=16100#warnings


5
Arctic sea ice / Re: What's new in the Arctic ?
« on: June 13, 2017, 04:52:04 PM »

A Canadian Ice breaker was diverted from a Science Mission in the arctic to rescue missions off Newfoundland due to dangerous ice conditions.

About 40 scientists from five Canadian universities were scheduled to use the icebreaker CCGS Amundsen for the first leg of a 133-day expedition across the Arctic. It's part of a $17-million, four-year project led by the University of Manitoba that looks at both the effects of climate change as well as public health in remote communities.

http://www.cbc.ca/beta/news/canada/manitoba/climate-change-study-1.4157216

6
Antarctica / Re: Rift in Larsen C
« on: May 31, 2017, 06:48:29 PM »
The rift has grown by 17 km since May 25!
 
"In the largest jump since January, the rift in the Larsen C Ice Shelf has grown an additional 17 km (11 miles) between May 25 and May 31 2017. This has moved the rift tip to within 13 km (8 miles) of breaking all the way through to the ice front, producing one of the largest ever recorded icebergs. The rift tip appears also to have turned significantly towards the ice front, indicating that the time of calving is probably very close."

http://www.projectmidas.org/blog/another-step-closer/


7
Antarctica / Re: Rift in Larsen C
« on: May 02, 2017, 05:20:17 PM »

https://www.eurekalert.org/pub_releases/2017-05/su-air050217.php

https://scienceblog.com/493824/larsen-c-antarctic-ice-rift-spreads/

The linked articles note the rift in the Larsen C ice shelf in Antarctica now has a second branch, which is moving in the direction of the ice front.  "While the previous rift tip has not advanced, a new branch of the rift has been initiated. This is approximately 10km behind the previous tip, heading towards the ice-front.  "This is the first significant change to the rift since February of this year. Although the rift length has been static for several months, it has been steadily widening, at rates in excess of a metre per day."

8
Consequences / Re: Wildfires
« on: December 28, 2016, 02:19:47 AM »
My old laptop crashed last month and with it all the bookmarks I had which included nation and worldwide wildfire reports/maps.

Can anyone recommend a few sights for me? Google searches have proven disappointing.

Canadian Interagency Forest Fire Center Sitrep:   http://www.ciffc.ca/index.php?option=com_content&task=view&id=25&Itemid=212

Canadian Fire Smoke Forecast: http://firesmoke.ca/

American NIFC National Interagency Coordination Center Sitrep is linked from here:  https://www.nifc.gov/nicc/



10
Consequences / Re: Places becoming less livable
« on: August 27, 2015, 10:09:33 PM »
Western canada experienceing drought, heat fires, agricultural emergencies, low river flows for hydroelectric power and drinking, limited water use.

http://calgaryherald.com/uncategorized/snowy-canada-suffers-drought-heat-fires-as-earth-gets-warmer

11
Arctic background / Re: Arctic Wildfires
« on: August 25, 2015, 07:18:02 AM »
The Siberian wildfires are in the boreal forest, an environment that needs wildfire to maintain itself, so from that perspective, whether ignited by man or lightning, they are a natural event to a point.  But the wildfire fighting community has a bit of a problem; they got too good at it for their own good.  Since the end of WWII they got really good at fighting wildfires, finding them early, hitting them hard, using helicopters, air tankers, heavy equipment, and gas powered pumps.   Or at least they got really good at fighting the low intensity wildfires who's spread and behaviour were already somewhat limited by small amounts of forest fuel loading in the understory. 

On the parts of the landscape with timber we used logging to, in some respects, emulate wildfire.  It removes the fuels, we re-establish the trees and keep the forest young.  But there are many parts of the landscape, the black spruce bogs, slow growing soil types, steep slopes, sensitive areas, parks, and residential subdivisions in the forest, where, through firefighting, we almost eliminated fire, the landscape.  This, in an ecosystem, that relies on fire as a natural disturbance, as it's only natural method to replenish itself.   Over this last 70 years the amount of fuels on the landscape has been changing, increasing, well beyond what might be within the natural range of variability. 

So now, many of our wildfires in the boreal forest are driven by a much higher fuel loading than they saw before.  The network, or patchwork, of small or low intensity wildfires is gone from the landscape, and we experience the mega fire phenomenon.  (Google mega fire and you get lots of good reading).   These fuel driven mega fires are further complicated by changes in the weather.  Wildfire behaviour is incredibly sensitive to relative humidity, temperature, wind speed, and fuel type, and all of these are sensitive to climate change. 

One small example of a seemingly minor weather change with big implications.  The temperature of our overnight lows seem to be changing, increasing, although our daytime high temps seem less changed, (according to a few small local data sets we looked at, nothing publishable).  But this one small change means more frost free days, earlier snow melt in spring, less relative humidity recovery (increase) overnight, a longer effective wildfire burning period during the day,  grass curing earlier in the season so more cured (flammable) grass,  and I’m sure a whole number of more complications.

12
Arctic background / Re: Arctic Wildfires
« on: August 11, 2015, 07:45:48 AM »
For Canadian wildfire smoke forecasts, - smoke drift-  based on locations of Canadian fires, bluesky has a good website updated daily

http://firesmoke.ca/forecasts/

Bluesky smoke forecasts also available for Alaska and US:

http://www.airfire.org/data/bluesky-daily/

For daily updates of the Canadian wildfire situation and stats you can look at the CIFFC - the Canadian Interagency Forest Fire Centre

http://www.ciffc.ca/index.php?option=com_content&task=view&id=25&Itemid=212

For the US wildfire situation and wildfire stats (in acres), NIFC - The National Interagency Wildfire Coordination Center has a sitrep updated daily

https://www.nifc.gov/nicc/sitreprt.pdf



13
Arctic sea ice / Re: Arctic Image of the Day
« on: April 01, 2015, 07:10:12 PM »
Would be interesting to add the Churchill Port cam on Hudson's Bay to the webcam page over in sea ice graphs.  http://www.portofchurchill.ca/port-media/live-feed

14
Arctic sea ice / Re: The 2015 melting season
« on: April 01, 2015, 07:47:30 AM »

That is how you get major flooding events in the spring in snow country.
[/quote]

In snowy mountain country it is rain, warm rain on snow and ice in the mountains will flood the valleys below.  I imagine rain on ice will melt it in the arctic as well.  And warm air is one thing, but warm moist air holds a lot more energy and melting power than warm dry air.  Wind will melt the snow fast, as well, because it mixes the air and keeps the warm air near the snow.  But warm wind does not usually cause flooding, because it also causes evaporation of whatever it melts.  Not that flooding is actually a problem in the arctic, but I wonder if it affects melt pond formation.

15
Arctic sea ice / Re: Arctic Image of the Day
« on: May 29, 2014, 06:45:23 AM »
Ice in the port of Churchill is looking pretty rotten now.  Shows up in the live camera feed.

http://www.omnitrax.com/media-center/portofchurchillcamerafeeds


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