In the North, the radiator is lighted
By Denis Delbecq • June 19th, 2008 in 9:36 · Category: Actuality
Bets are opened. After winter richer in sea ice, waters of the Arctic seem to warm themselves up with a quicker rhythm than last year. Mid-June, the expanse of the floe found weak level of last year at the same time, according to the American national Centre of data on the snow and the ice (NSIDC). In 2007, the floe had established a new record of weakness, with a little more than 4,2 million square kilometres covered with at least 15 % of ice, against 7,8 million kilometres ensconced themselves in 2000. If situation persists this year, a new record should be established next September.
According to NSIDC, the minimal surface of ice diminishes from now on by 10 % every ten years, the upper rhythm in what envisage the climatic models. The progressive putting in operation of a new satellite of measure should not change observations considerably. "Old" DMSP F13, who begins giving signs of weakness, works in unison with his substitute, F15, so as to test measures. The distance between both instruments should not exceed thirty thousand square kilometres, for surfaces which measure in million square kilometres.
As last year, the very quick disappearance of sea ice this spring is to put in the credit of conditions of abnormal temperatures. On most Arctic, distance is of +1°C in +3°C, but it achieves 6°C in the Baffin bay. Progressively, the thickness of sea ice is reduced year by year, to the point of attaining the melting point. The re-formed ice the winter on zones in free waters is too slim to resist spring and a hotter summer than a normal. A long succession of cold winters and cool summers would be needed so that the floe re-forms in a lasting way.
One week ago, the Centre of atmospheric researches of Boulder (the United States, Colorado) had shown that the meteorological modifications led by the disappearance of sea ice watch each other from now on up to one thousand five hundred kilometres inside lands. Notably because the disappearance of the floe changes the absorption of the solar radiation (the water is a radiator of the Earth, the ice a fridge) and exchange rate at the same time the cloud cover and the regimes of wind.
Picture: © Shari Gearheard, National Snow and Ice Data Center.
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Comments in 
J’ have 100 watt / m ²/s for 2 continuous months and I find 200 000 Thousand millions of kwatth what makes over 2 months d’ be a considerable energie who serves for warming up masses d’ important water!
Summers to you d’ agreement with my calculation?
Mr to Go too far
They see there that the blue curve of 2008 moves away now upwards to the curve of 2007. It would be simpler for bets.
In Meeting c’ timetable on l’ year therefore is 208 on average by making and another 5 kwhm ² / day on l’ year on average
calculation gives
100 watt / m ²/s *surface exposée* time d’ exhibition 2 months * difference d’ albédo 57 I find 200 Tera kwh
c’ am consistent because j’ brought closer to this calculation with l’ solar energy arriving l there’ space of 2 months on the Earth (the power of the sun is from 174 Tera kw and I find well the fact that the south zones groenland recoivent 2 kwh / m ²/day on l’ year while the tropical zones 7 in Arabia notemment
In fact 200 Tera kwh figure is to give an order of magnitude of l’ additional energy cashed by artiques waters