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Extreme climate change over 100000 years!!

 
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User ID: 659317
Sweden
06/10/2009 03:07 AM
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Extreme climate change over 100000 years!!
[link to translate.google.com]

The temperatures has shifted up to 30 celisius.
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User ID: 659317
Sweden
06/10/2009 03:09 AM
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Re: Extreme climate change over 100000 years!!
Entirely new analysis showing differences in the Swedish environment for a very long time. In a perspective of one hundred thousand years average annual temperature can vary by more than 30 degrees.
.
- In new research study, we describe within the limits climate are likely to vary by presenting three periods of extreme conditions, say climate scientists Erik Kjellström and Gustav Strandberg.
A recently completed research project on the Swedish environment over a period of one hundred thousand years fills gaps in knowledge about the historical development, but also provides guidance for future climate.

- The analysis increases the understanding of climate extremes for three periods but also provides more insight into the various linkages and feedback loops, which we read in our climate. For the first time we have made climate estimates for time-scales, both at the global level and also in more high-resolution regional level, "says climate researcher Erik Kjellström, SMHI.

- A large part of today's climate research focuses on scenarios one hundred years ahead. For the more long-term development, we can not specifically say where and exactly when something happens. In the new research study, we describe within the limits climate are likely to vary by presenting three scenarios with extreme conditions.

Permafrost, glacial, warmer future climate
The three examples that were calculated using the climate is a cold climate with limited isutbredning, a glacial climate, and a future warm climate. As the basis for the calculations have used conditions corresponding to a period of permafrost for 44 000 years ago and the last ice age 20 000 years ago. The hot example is meant to reflect the climate of 6 000 years.

-We know that the carbon dioxide released into the atmosphere remains very long. The warm future period shows therefore a very similar pattern as the scenarios we have a hundred years. The results also suggest that if Greenland's ice melts, it will not re-formed again.

Large temperature differences
Temperature differences between the warm and cold periods is very large in the study. Particularly significant is the variation in winter, when the average temperature is more than 40 degrees higher in the warm period compared to during the Ice Age. The large differences in temperature environment depends, in addition to the general climate was much colder during the Ice Age, even at that temperature is affected by the altitude of the inland ice. Although rainfall varies between the periods, the warmer the more rain.


Results from the research shows the difference in average temperature in winter during ice age, compared with a warmer climate 6 000 years forward.


Factors affecting
An important part of the research project has been to identify various factors that affect climate, such as isutbredning, land uplift and vegetation change. Warmer climate leads in general to more växlighet which in turn can produce additional heating. Major influence on climate has also dust and particulate matter - during the cold periods of lower ocean surface swirls more dust up with COOLING effect on climate.

Climate projections have been analyzed together with the information you can get on the climate from eg pollen and algae from prehistoric times. In the Mediterranean is a fairly good access to these data, giving an estimate of the climate in different periods. For the ice age in Sweden is missing, however, this type of climate guidance and therefore also provides research entirely new basis.

The research was carried out over two years on behalf of SKB in cooperation with the Royal Institute of Technology, Lund and Stockholm University.
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User ID: 659317
Sweden
06/10/2009 05:49 AM
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Re: Extreme climate change over 100000 years!!
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DANE
User ID: 181805
Denmark
06/10/2009 06:14 AM
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Re: Extreme climate change over 100000 years!!
cool and very interesting, i think we soon are in for an little ice-age...lets see next winter :-)=



DANE
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User ID: 659317
Sweden
06/10/2009 09:24 AM
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Re: Extreme climate change over 100000 years!!
cool and very interesting, i think we soon are in for an little ice-age...lets see next winter :-)=



DANE
 Quoting: DANE 181805

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