Sometimes the rants of Alarmists amuse me. Rather than moan softly and roll my eyes, I sit back and admire how something ordinary can be turned into something that sells newspapers (and/or attracts grant-money.)
In my last post I mentioned how a “blocking high-pressure” has persisted over Greenland, leading to lots of sunshine and far fewer North Atlantic gales ramming into the mountains and dumping copious amounts of snow onto the icecap. I warned this would reduce the yearly increase in Greenland’s “ice-balance”, even without including any summer melting. A massive amount flows off the ice-cap as glaciers and calves off into the sea, all year long, and, if not replaced by huge snows, the “ice-balance” dips. Alarmists were mute when the “ice-balance” blipped upwards the past two years, but I warned they would find their voices this summer as the ice-balance fell.
I neglected to include a further warning. Some ice might actually melt, especially with the blocking high-pressure making sunshine so persistent. Ice and snow always does melt on Greenland, especially at the very edge, although it doesn’t melt back as far now, as it did in the Medieval Warm Period, when the Vikings were able to raise several thousand cattle and over 100,000 sheep and goats. Though summer thaw is normal, when any sort of thaw occurs you can expect the Press to beat their drums. As the start of summer thaw has occurred yet again, and the Press has gone ape, I thought I’d give examples of some of the stages the Press’s hoop-la typically goes through.
First, a dramatic photograph is needed. Such pictures are usually of the dramatic meltwater rivers that form in the south of Greenland, where very thick ice pushes south into milder Alantic air and nearly twenty-four-hour-a-day sunshine, and also slopes down from an altitude of over 10,000 feet, where its cold, towards sea-level, where its above freezing. Obviously the top of the ice will melt, especially where a slope faces south, and the streams of melt-water that then get going in June and July can thunder. In New England we call such abrupt melting of snow and ice a “freshet” and they are usually brief, as we run out of snow to melt, while in Siberia the Lena River can rise sixty feet as the snows melt. However in Greenland the supply of snow and ice is not only boundless, but the streams are not running over rock and sand, but ice, and they cut crystal canyons and even find crevasses where they plunge underground. Ice-geologists have to be very careful, because one slip and you get no second chance and can’t hit the “replay button”, be they do take wonderful pictures of fantastic formations. The holes melt-water pours into are called “moulins” and they can be small:
Or they can be huge:
And I can understand why a young, strong geologist would want to get someone to pay him to look at such wonders. I myself prefer to stay home and, on a hot day in July, to type “Moulin images” into my search engine, and then sift through the thousands of pictures from glaciers all over the world.
I assume the Press does the same, to find a picture to sensationalize the screaming headline GREENLAND MELTING, (though sometimes they accidentally use a moulin from a glacier in Alaska or Tasmania.) But the picture the Press used this year was really unique, and made me chuckle.
The Press of course will fail to mention this is not an icecap. It is a lake or inlet, nice and flat, which does what lakes and inlets do, (freeze in the fall and thaw in the spring). This is a picture of some coastal-Greenland meteorologists heading out to retrieve some equipment before it sinks to the bottom.
You can tell this pictures is taken from a lower elevation because the mountains are snow-less and brown. To the upper right of the picture there is some evidence of the edge of the true Greenland icecap.
Once you move up onto the actual icecap and move away from the edges, temperatures rarely nudge above freezing, and are often far below. The deep snow compacts under the weight of year after year’s worth of snow, becoming this compact (yet surprisingly drafty) stuff called “firn”, and then finally compacts into the glacial ice, roughly a mile thick, from which ice cores are drilled. These ice-cores, when examined, do show a difference between winter snow and summer snow, which creates a yearly layer and allows the dating of cores. But they apparently show something else which is interesting.
Around once every 40 years a “blocking high-pressure” creates enough sunshine to actually create a thaw which can be noticed in the ice core records.
Such a thaw can’t merely be a few minutes above freezing. It must last long enough to soften at least the top sixteenth of an inch of snow, making it more like the sticky stuff that boys fling at each others in snowball fights, than the drifting powder which boys find fairly useless.
Please observe that, in the eyes of the media, a photo of the sun softening the top sixteenth inch of snow up at 10,000 feet would make a boring picture, (which is why the Press uses pictures from other places, in order to increase the sense of drama and sell more papers).
Also sometimes the temperatures nudge above freezing for such a brief time that the snow doesn’t even soften, nor leave a permanent record for ice cores. I assume the recent event was just such a brief thaw. However it is still possible to drum up drama and sell newspapers, even from such an inconsequential event….as follows:
First of all, the Press can stress the inconsequential event occurred over a vast area, and a sub-headline may scream, “40% of Greenland thawing.” Then the Press will include a graphic that is honest, but misleading if misinterpreted, such as this:
The above map has nothing to do with how much water was produced, or how much the sea–levels rose, but rather shows where temperatures inched above freezing enough to make snow sticky. It is a large area, for June. To me it demonstrates how the “blocking high-pressure” has made it especially sunny up there (and especially dismal, cold and rainy down in New England, where I live.)
The next step is to take the above data, (which involves “area” and not “amount”), and sensationalize how early the “area” is. But in fact, even if the top sixteenth of an inch of the snow over the entirety of Greenland softened, it wouldn’t produce even a trickle of water. It takes more serious melting to produce melt-water creeks and moulins. However to sell newspapers (and get grants) a graphic is created that is all about “area.”
It may be true that the mid-June “area” is “unprecedented” for so “early” (though in actual fact it should be expected, as the sun is near its highest), and it furthermore may be true the word “unprecedented” sells headlines, (especially when coupled with pictures of floods), but I must say, at the risk of being a “party poop” and “wet blanket”, that “area” is not the same thing as “amount”.
The records we have from the Greenland icecap are gathered by tough men in rough conditions, and I will not put such men down, but the data they gather are records that are recent, and can’t show the scope of history. The “average” of the above graph can’t include unseen variations hinted at by the history of Vikings in the Medieval Warm Period. And they don’t include “amount”.
Let me give you an example of how “area” can mean next to nothing, in terms of “amount”.
When we read that this “unprecedented” area is above freezing, it involves individual stations. Let us look at such a station, way up over 10,000 feet.
As you can see, at this station temperatures poked above freezing twice in a period of roughly fifteen minutes. (Not enough to flood Florida or the Netherlands). (And maybe not even long enough to soften the snow enough to be noted in future ice-core records.)
Yet this station’s temperatures are included in the blaring headline, “40% of Greenland Above freezing. Thaw Unprecedentedly Early.”
I suppose the above station deserves its fifteen minutes of fame as much as the next man, but I am not expecting a wall of melt-water to descend upon us, from the north, any time soon.