Via Eurekalert, maybe Tedesco just isn’t looking hard enough, or maybe he only looks at data, as these and other photos previously published on WUWT and Mother Jones demonstrate:
![box-snow-1-630[1]](https://wattsupwiththat.files.wordpress.com/2015/04/box-snow-1-6301.jpg?quality=83)
Greenland darkening to continue, predicts CCNY expert Marco Tedesco
Darkening of the Greenland Ice Sheet is projected to continue as a consequence of continued climate warming, Dr. Marco Tedesco, a City College of New York scientist, said at the European Geosciences Union (EGU) General Assembly in Vienna today.
Tedesco told a press conference in the Austrian capital that the projection is based on a model that only accounts for the effects of warming on snow grain size and melting.
An associate professor in City College’s Division of Science and head of its Cryospheric Processes Laboratory that he founded, Tedesco is an authority on the Greenland Ice Sheet where he has conducted annual research.
He noted that a darkening of the Greenland Ice Sheet associated with increasing temperatures and enhanced melting occurred between 1996 and 2012. It was promoted by:
- Extensively and persistently increased surface snow grain size;
- The expansion and persistency of the areas of exposed bare ice and by the increased surface impurities concentration associated with the appearance of dirty ice;
- Increased impurities concentrations due to consolidation with snowmelt.
Tedesco, however, added that his research had not found any evidence that points to either increased atmospheric deposition of impurities or to the number of fires over Eurasia and North America as being factors.
The EGU General Assembly 2015 brings together some 12,000 geoscientists from all over the world into one meeting covering all disciplines of the Earth, planetary and space sciences.
###
Maybe Tedesco lives in a cocoon and missed the “Dark Snow Project” which took this video last year:
Published on Oct 29, 2014video taken during a 23 August 2014 maintenance tour of promice.org climate stations on the southern Greenland ice sheet. Higher on the ice sheet, the surface is not this dark. But down low, where the highest melt rates happen, this darkness amplifies absorbed sunlight, the dominant energy source for melt.
Tedesco must be either incompetent, blind, an activist or all three, because the data on northern hemisphere fires contradicts his claim of “his research had not found any evidence that points to either increased atmospheric deposition of impurities or to the number of fires over Eurasia and North America as being factors.“
![box-snow-8-630[1]](https://wattsupwiththat.files.wordpress.com/2015/04/box-snow-8-6301.jpg?quality=83)
You can watch the pattern of flow which puts particulates into the Greenland ice sheet:
I’m sorry, but I think Tedesco’s claim amounts to nothing more than “science climate activism by press release”.
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Icelandic volcanos have no effect either I suppose.
Ah. Retrograde metamorphism of glacial ice in the ablation zone (a change in the C-crystallographic axis relative to flow).
Seems much of the “Glaciological Community” yet fail in knowing let even understanding crystallography and thermodynamics of rocks, including the forms of Ice (1H).
With every photograph there is a lie that the photographer disparately (e.g. NSF funding) needs to exploit.
Ha ha 😀
So if we ask a warmist whats best for mother nature, a thin white ice or a thick grey ice, he will not be able to come up with an answer. Talking about sea ice thickness is all important. Talking about ice on Greenland colour is most important. If albedo is the important bit then thickness doesnt mather. A layer of carpaint is less than a mm, and still the difference from black and white colour is messurable.
Is this blackening of ice a cumulative process?
Every year more black particles are deposited?
If the ice melt is intense to completely melt previous year, and that one year before and so on, I would say Yes. Thus, we may have 20 or more years of ash accumulation in a single layer, accelerating melting even further.
In a few hundreds or more years someone will be analysing top ice cores, and since annual markers are lost, it may conclude that thickness of accumulated ash indicates a cataclysmic fire caused by a impact of a meteorite or whatever .
“Tedesco must be either incompetent, blind, an activist or all three, because the data on northern hemisphere fires contradicts his claim of “his research had not found any evidence that points to either increased atmospheric deposition of impurities or to the number of fires over Eurasia and North America as being factors.“”
he did not say, there is no evidence, he said, he found no evidence, and you provide no evidence. you just show correlation.which is not the same as causation.
A picture is worth a thousand threads of biased gibberish burying a plank of reality.
I am sceptical about reliability of the photographs. Lifting gama by 2 revels different looking horizon.
http://www.vukcevic.talktalk.net/ArcticIce.jpg
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I was surprised by the darkness of the snow at first, but then realized that a lot of it comes from ruts and crevices and the shadows they produce. Then the darkness of the sky suggests a polarizing filter, which has a big impact on the surface appearance also.
The clouds are wrong. ?
And mankind will stop this geologic event with tweaking our co2 output. Ok, got it. grrrrrr……
Remember the Gold-White Black-Blue skirt?
Perception and optics play tricks on all of us, especially Jason Box and Marco Tedesco. Safe to say they god Ds in Physics class, if they ever took a class in physics.
http://ilively.com/Art/15548-8-mind-blowing-optical-illusions-how-they-work