Comments on: Greenland ice sheet reflectivity at record low, particularly at high elevations http://www.meltfactor.org/blog/?p=476 the ice and climate web log of Jason E. Box, Ph.D. Fri, 17 May 2013 10:54:25 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: david jefferson http://www.meltfactor.org/blog/?p=476&cpage=1#comment-3508 david jefferson Wed, 25 Jul 2012 15:16:11 +0000 http://www.meltfactor.org/blog/?p=476#comment-3508 Looks like you got it right re: tipping point. good call! http://www.nasa.gov/topics/earth/features/greenland-melt.html all it took was a little warm air and the entire surface melted. i did find info on internal ice temps here, it's a free report. http://www.sciencemag.org/content/282/5387/268.full but the above mentioned report doesn't seem to support recent observations (recorded data for last 150 years) of warming in northern hemisphere. it shows falling temps. since 1930. Any idea why? Looks like you got it right re: tipping point. good call!
http://www.nasa.gov/topics/earth/features/greenland-melt.html

all it took was a little warm air and the entire surface melted.

i did find info on internal ice temps here, it’s a free report.
http://www.sciencemag.org/content/282/5387/268.full

but the above mentioned report doesn’t seem to support recent observations (recorded data for last 150 years) of warming in northern hemisphere. it shows falling temps. since 1930. Any idea why?

]]> By: Jason Box http://www.meltfactor.org/blog/?p=476&cpage=1#comment-2669 Jason Box Thu, 28 Jun 2012 00:53:04 +0000 http://www.meltfactor.org/blog/?p=476#comment-2669 there is a ton of work measuring ice sheet internal temperatures, for example http://www.agu.org/pubs/crossref/1997/96JC03981.shtml there is a ton of work measuring ice sheet internal temperatures, for example http://www.agu.org/pubs/crossref/1997/96JC03981.shtml

]]> By: F. L. Hurst http://www.meltfactor.org/blog/?p=476&cpage=1#comment-2660 F. L. Hurst Wed, 27 Jun 2012 19:55:49 +0000 http://www.meltfactor.org/blog/?p=476#comment-2660 Is there any work you know of to measure the internal temperature of the ice sheet??? Is there any work you know of to measure the internal temperature of the ice sheet???

]]> By: John Russell (Twitter@JohnRussell40) http://www.meltfactor.org/blog/?p=476&cpage=1#comment-2617 John Russell (Twitter@JohnRussell40) Wed, 27 Jun 2012 11:43:50 +0000 http://www.meltfactor.org/blog/?p=476#comment-2617 When I was a kid in the 1950's, growing up in Sheffield, UK; snow in winter, as it melted, turned blacker and blacker. This was because the atmospheric particulates held in the snow (and falling on the snow) would concentrate on the surface as the snow melted. I would guess that what's being described here in Greenland is that as annual and multi-year ice melts, soot normally distributed within the ice will concentrate on the surface, reducing albedo. I hope it doesn't turn as black as I remember it did in Sheffield -- even on the surrounding moors many miles out of the city. I even remember that the soot would collect in hollows and ridges on the pitted surface -- perhaps caused by the heat the soot was absorbing? Has research been done to determine how much 'dark material' is held within the ice that's melting? When I was a kid in the 1950′s, growing up in Sheffield, UK; snow in winter, as it melted, turned blacker and blacker. This was because the atmospheric particulates held in the snow (and falling on the snow) would concentrate on the surface as the snow melted. I would guess that what’s being described here in Greenland is that as annual and multi-year ice melts, soot normally distributed within the ice will concentrate on the surface, reducing albedo.

I hope it doesn’t turn as black as I remember it did in Sheffield — even on the surrounding moors many miles out of the city. I even remember that the soot would collect in hollows and ridges on the pitted surface — perhaps caused by the heat the soot was absorbing? Has research been done to determine how much ‘dark material’ is held within the ice that’s melting?

]]> By: Greenland melt record likely http://www.meltfactor.org/blog/?p=476&cpage=1#comment-2612 Greenland melt record likely Wed, 27 Jun 2012 11:01:57 +0000 http://www.meltfactor.org/blog/?p=476#comment-2612 [...] Box reports that the Greenland ice sheet darkening recorded in satellite albedo1 measurements is setting new [...] [...] Box reports that the Greenland ice sheet darkening recorded in satellite albedo1 measurements is setting new [...]

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