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Andrew Xnn
New York
Father, Chemical-Nuclear Engineer and Cyclist
Interests: Health & Nutrition
Climate & Science
Recent Activity
Looking at the average thickness graph, I can see why it may be more than just a few year to an ice free arctic.
It has taken close to 30 years to lose 1 meter and there is still just over 1 meter to go.
PIOMAS September 2013
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: The cold, cloudy and calm conditions of the past weeks have made themselves felt in the volume numbe...
Useful to remember that multi - year ice is still a very significant portion of the total during the September minimum.
Wondering if multi-year ice will disappear all at once, or if there will be a gradual reduction in the oldest ice first.
That is could we expect to have a time in the near future where only First, 2nd, 3rd and 4th year ice is present or will it all be gone in 1 summer?
NSIDC Arctic sea ice news September 2012
A couple of days ago the NSIDC released its latest analysis for the month of September. For the exact numbers with regards to the shattered record I refer you to the article itself. This graph says it all: The analysis then moves on to some interesting comparisons with 2007. First off, the ...
Somewhat off topic, but a report has come out about the first sailboat to traverse the Northwest Passage. Several nice photos including one from site of graves from Franklin expedition.
http://belzebub2.com/?lang=en
http://www.cbc.ca/news/canada/north/story/2012/08/29/north-northwest-passage-sailors.html
Why Arctic sea ice shouldn't leave anyone cold
The sea ice is leaving us a bit more every year. It's time to start contemplating its absence, which is why I teamed up with Kevin McKinney to write an extended version of the shorter piece you might see pop up here and there. Because you know, disappearing sea ice isn't without consequences. An...
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Posted Jun 1, 2012 at CyclingNutritionSkiingClimateScience
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Natural Gas Storage
Posted Jun 1, 2012 at CyclingNutritionSkiingClimateScience
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TEST
Posted May 25, 2012 at CyclingNutritionSkiingClimateScience
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April 8 2012 Yearly Global Temperature Anamolies
Posted Apr 8, 2012 at CyclingNutritionSkiingClimateScience
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April 4,2012
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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April 6, 2011
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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March 10 2010
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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March 11 2009
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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March 2011 thickness
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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Mercator Ice Thickness March 7 2012
Posted Apr 4, 2012 at CyclingNutritionSkiingClimateScience
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Best way I know to create images is to use Paint.net.
For Excel stuff, just paste it and then resize to 420 pixels wide. Then post it to a blog
and use the img src="....." line of html (include < before and > after).
April 2012 Open Thread
Just like with calling the CT SIA maximum, I can't even get the timing for the last open thread right. But the March open thread was getting full. This should be the last one. I think. image by Paul Nicklen, found on the Narwhal's Left Tooth blog I'll be gone for a couple of days, but should be...
Global Temp Anamolies
Posted Apr 2, 2012 at CyclingNutritionSkiingClimateScience
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The 90 day surface temp anomaly map shows below normal temps over most of the Bering and portions of the Chukchi and Beaufort seas. However, these areas almost always melt out. So, ice formation this winter over the rest of the Arctic was likely below normal; especially the Barents and Kara seas.
April 2012 Open Thread
Just like with calling the CT SIA maximum, I can't even get the timing for the last open thread right. But the March open thread was getting full. This should be the last one. I think. image by Paul Nicklen, found on the Narwhal's Left Tooth blog I'll be gone for a couple of days, but should be...
90 Day Temp Anomalies (April 2, 2012)
Posted Apr 2, 2012 at CyclingNutritionSkiingClimateScience
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Walt Meier is stating that the ice is only 10 to 30 cm thick at most (4 to 12 inches)!
http://earthobservatory.nasa.gov/IOTD/view.php?id=77513
NSIDC calls maximum extent
The National Snow and Ice Data Center in Boulder, Colorado, has called it: On March 18, 2012 Arctic sea ice likely reached its maximum extent for the year, at 15.24 million square kilometers (5.88 million square miles). The maximum extent was 614,000 square kilometers (237,000 square miles) bel...
The volume of ice melt is not related by any simple mathematical expression to atmospheric temperatures. This is because, the Arctic is so large and there are many other factors as well.
For example, ocean currents and temperature play a role as does the mechanical properties of ice as it breaks up. The intensity and direction of the wind can either enhance or diminish the export of ice from the Arctic to southern (and warmer) waters.
Finally, ice itself tends to keep the ocean heat contained within the ocean. So, in some respects, melting of ice results in greater export of heat from the Arctic and cooler temperatures.
March 2012 Open Thread
This will be the last open thread of the freezing season. Use it wisely. image found here
One problem with extrapolating the PIOMAS data is that there is a possibility that the data set contains a bias that is growing over time.
The system works by measuring the time difference for microwaves bouncing off the ice and the water. However, there are also melt ponds on the ice which could be throwing off these measurements. More melt ponds could mean a greater bias.
March 2012 Open Thread
This will be the last open thread of the freezing season. Use it wisely. image found here
JC; One reason why there is so much data over the last 30+ years is we only have good satellite data starting from 1979.
A first clue
However unpredictable it is, we still like to gather as much information as we can about the coming melting season. Obviously it's important to get an idea of what happened to the Arctic sea ice during the last freezing season. We've just witnessed the spectacular retreat of ice and late freezin...
80N temps upto March 11 2012
Posted Mar 11, 2012 at CyclingNutritionSkiingClimateScience
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March 11 2012 Polar Temps
Posted Mar 11, 2012 at CyclingNutritionSkiingClimateScience
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It maybe that something else has happened with 2010 and 2011. Both of these years show a dramatic late season loss followed by a later recovery.
Could it be that melt ponds are becoming much more common and in turn are not being measured by the satellites accurately?
Alternatively, the melt ponds may be occurring earlier in the season of 2010 and 11.
I'm suggesting this because it seems very odd that the amount of melting in the 2nd part of the season has fallen so much for 2010 & 2011.
PIOMAS March 2012
The Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center has been updated: Slightly lower than last year... Wipneus has produced a new graph for which he calculated the "expected" 2012 values, based on the s...
So, this paper is stating that in the past 12 years, despite warming temps and melting ice, there has been a net cooling of the ice sheet from more fresh snow in some areas.
However, with a little bit more continued warming, the albedo will shift so that higher elevation dry areas begin to feed back positively and result in net warming over the entire sheet.
In other words, the sheet has not reached a state of maximum melting, since it's only the lower elevation area that have positive feedbacks.
Arctic Glaciers
Below are research papers on glaciers in the Arctic circle, to be more precise: Greenland, the Canadian Archipelago, Svalbard, Franz Josef Land, Novaya Zemlya and other Siberian islands. Click on the discussion page of a paper to read excerpts, download a copy and discuss the paper. If there are...
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