Climate, melting ice and sea level

Warming and Climate Change: causes, consequences, analysis ... Debate on CO2 and other greenhouse gas.
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stipe
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by stipe » 05/05/11, 14:44

dedeleco wrote:If we exceed happily the doubling of CO2 and other greenhouse gases (almost certain, because the peak of fuels is imaginary))


[HS]
Dedeleco, you usually do things with such confidence that I tend to believe you, but concerning the peak of fuels, it is not so imaginary in my opinion ...
I would like to believe that there is as much oil as you say, but I am not at all convinced that we can extract it in a profitable way (for example, the day it will take more than one barrel of oil). oil to extract one from the soil, it can remain as much as you want, oil, we will use another source of energy, which will seem very cheap compared to fossil fuels ....
[/ HS]
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Christophe
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by Christophe » 14/09/11, 11:47

The terrible record of Arctic ice melt

The fears of Greenpeace and many scientists have proven to be justified. The year 2011 will beat the sad record of the minimum level of the pack ice in the Arctic. With 4,24 million square kilometers, the ice extent is about 0,5% lower than the previous September record 2007 and is the lowest since satellite observations began in 1972. This is the result of studies conducted by scientists from the Institute of Environmental Physics at the University of Bremen (Germany),
In addition, right now, Greenpeace is conducting a scientific expedition to the region, made up of independent scientists from the University of Cambridge's Department of Oceanology (Nick Toberg and Till Wagner), who are conducting research on the thickness and volume of Arctic sea ice. These two data are, beyond the measurement of the extent of the ice, indispensable for measuring the retreat of the pack ice.

The sea ice could disappear in summer before 2050

Temperatures in the Arctic region would have increased twice as fast as average temperatures over the last fifty years. The extent and thickness of Arctic ice has also been significantly reduced in recent decades. According to scientists, the melting of ice during the summer is an excellent indicator of global warming but it is also a real key to the phenomenon. The decline of the pack ice can no longer be explained by the natural variability from one year to the next. Instead, the climate models show that this decline is linked to global warming, which is particularly pronounced in the Arctic because of the "albedo" phenomenon, the fraction of solar energy reflected back into space.

In addition, scientists at NSIDC (a US center specializing in snow and ice observations) noted the near-complete disappearance of ice in the channels of the Northwest Passage. The southern route would therefore also be free of ice.

Another blatant proof of the dramatic effects of climate change in the Arctic came out last week. Alan Hubbard, a Welsh glaciologist at Aberystwyth University and a specialist in the Petermann Glacier (in northern Greenland), found that the glacier that had broken off last August, more than 260 km2 ice, had totally melted and gone.

The atmosphere over the Far North is warming up faster than elsewhere and if the trend continues the sea ice could completely disappear in the summer period by 30 years, forty years earlier than estimated by the IPCC ( Intergovernmental Panel on Climate Change).
The last time the Arctic was completely free of ice in the middle of summer was 125 000 years ago, at the heart of the last great interglacial period.

The melting of the Arctic sea ice is one of the most visible impacts of climate change, with significant consequences not only for the native populations, the fauna and flora of this region, but also for the entire planet.
What a bitter irony is that the burning of oil plays a major role in the melting of the pack ice, and that the same melting is seen by many as an additional opportunity to create markets for oil companies ... The loop is complete.


http://energie-climat.greenpeace.fr/le- ... n-arctique
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moinsdewatt
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by moinsdewatt » 14/09/11, 20:32

You do not seem to know the nsidc you others.

http://nsidc.org/data/seaice_index/imag ... series.png

the end of the summer is approaching, the maximum extension obtained?

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moinsdewatt
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by moinsdewatt » 05/02/12, 20:49

http://nsidc.org/data/seaice_index/imag ... series.png

What is happening up north while shivering in Europe?

Well the high ca does not really promote the formation of the pack ice ....
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dedeleco
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by dedeleco » 06/02/12, 01:02

The current cold that comes from the north and from Siberia, is much weaker than formerly, as in 1956 or 1954 and it allows the heat of the south to go up north and to have the colder poles, in a closed circuit , the air circulating in circles through the poles, to return to the south, which are therefore less cold than formerly.
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by Obamot » 06/02/12, 06:44

In spite of that with these freezing temperatures: which is the current one of the earth, in shallow depth?

If someone has placed a probe, it would be time to check ...
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the middle
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by the middle » 07/02/12, 08:13

Found this morning in the infos:
Studies by the Alfred Wegeneer Institute for Polar and Marine Research in Germany and the National Snow & Ice Data Center in the United States come to the same conclusions as those of climatologist Stefan Rahmstorf: global warming will cause harsher winters in our regions. You might as well prepare for it.

http://www.rtbf.be/info/societe/detail_ ... id=7522573
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by bidouille23 » 29/02/12, 14:29

bday,

I think that Al Gore's movie is quite well done on the subject, and unfortunately all (so to speak) the forecasts made in 2006 are confirmed at the moment.
there is a direct relationship between the sea current and the climate, the less active the gulfstream is, the colder it will be in europe, but not a cold to laugh a cold that kills.

The forecasts did not take into account the effect of spill on the ice floes, puddles form heats up the ice and destroys the bases thus allowing large iceberg to detach ...

Balance is better to prepare to have more and harder winter (well a priori not in Brittany here it is rather the opposite, our winter lasted two weeks see three to four in the center, on the coast we do not we have them a little fortnight of freezes in the morning, and 4 cold days 3 ° C so not really cold, at the time when I speak to you it is 14 ° C I am in Tshirt in the shade, the roses made flowers very late, the bees worked a month and a half longer than usual etc etc the changes are more than visible).
next to that in italy in the center, the wolves have no more food and go to town ...
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dedeleco
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by dedeleco » 10/04/12, 02:42

highflyaddict wrote:Hold ! http://www.futura-sciences.com/fr/news/t/climatologie-1/d/le-co2-aurait-bien-mis-fin-au-dernier-acentge-de-glace_37995/.

A big stick in the wheels of the deniers of global warming of anthropic origin!


Nature's article is very important, because huge US, Chinese and French work, all over the globe in 80 locations, measurements in ice and sediment on 22000 past years past temperatures and values ​​of CO2, which is not a simulation, but shows the reality past, that the average temperature of the globe followed the CO2 and especially that the T of the northern hemisphere was very late on the CO2 and the global T, warmed well before melting the icecap in the north.
So it is proved by this past experience that the CO2 released by a first local warming, triggered a global warming of the whole earth, which released even more CO2, which then melted with thousands of years of delay, the ice cap in the north. With these ice caps, the climate of the earth is very unstable.

This scientific article is so important that I put on econology with figures.
It is to read with great care, because he has measured the climatic reality of the deglaciation on the 22000 years spent on all the earth, and conditions all our future, with the current CO2 that will melt still a lot of ice caps, about 20 m of rising sea, with the current CO2 and much more if we continue to make it mount this CO2 !!

https://www.econologie.info/share/partag ... XYam3n.pdf

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dedeleco
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by dedeleco » 10/04/12, 14:51

This does not seem to excite crowds on econology, so it is about the future of our children and grandchildren !!
Even though I wrote with errors.

The climate of the earth is more and more unstable over the last million years (fundamental image to keep in the brain which notes this instability with the amplification of the least effect like that of CO2):

http://en.wikipedia.org/wiki/Ice_age
Image


Read all these very informative links:
http://fr.wikipedia.org/wiki/Histoire_du_climat
http://de.wikipedia.org/wiki/Klimageschichte
http://en.wikipedia.org/wiki/Ice_core
http://fr.wikipedia.org/wiki/Carotte_de_glace
http://fr.wikipedia.org/wiki/Glaciation[/ Quote]
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