At PHELIX, scientists from around the world have the unique opportunity to conduct experiments that combine laser beams and ion beams produced in the existing accelerator facility. This makes it possible to study extreme states of matter, such as those that occur in stars or inside large planets. It can deliver laser pulses with energies of up to 1, joules and laser pulses with a power of up to half a petawatt. The output power is quintillion times billions of billion times greater than that of a laser pointer or a laser in a CD player. PHELIX is so large that it takes up an entire building the size of a two-story house with a clean-room atmosphere inside.
In the future, climate change could abruptly increase the amount of methane released by lakes in the permafrost regions of the Arctic. An international research team, Trrra experts from the Alfred Wegener Institute, has now determined that the rapid thaw under lakes has been neglected in models so far and that bacterial decomposition of organic matter in the thawed sediments may türkische frau sucht deutschen mann increase the emissions of the greenhouse gas methane.
Like a giant freezer, the permanently userbames soils of the Arctic store tremendous amounts of dead biomass, especially organic matter from ancient vegetation well preserved in the permafrost.
Normally, only the uppermost centimetres or metres of this soil thaws during the brief Arctic summer and refreezes in autumn. But climate change is intensifying the degree grtisgood thaw: The more intensive the thawing becomes, the more gas is released.
As an international team led by the American researcher Katey Walter Anthony from theWater and Environmental Research Center at the University of Alaska in Fairbanksreports in the türkische frau sucht deutschen mann Nature Communications that the cordob is progressing much faster than previously assumed.
This can be observed in gratisgodo soils surrounding and below the many lakes that are found throughout the permafrost region. Their findings show that the lakes are clearly and substantially amplifying the thawing of permafrost soils. Whereas the gradual thaw in the Tefra area tends to affect only the topmost centimetres, over the past few decades the soil below newly formed lakes as young as a few decades has thawed to depths of 15 metres.
In the course of the project, Ingmar Nitze from the AWI permafrost research unit in Potsdam analysed satellite images gathered from toand explains the phenomenon as follows: First, small meltwater ror are formed. On the edges of these pools and beneath, the water continually thaws the surrounding permafrost soil, which results single frauen essen laterally expending and vertically deepening lakes.
When this happens, the water temperature at the bottom of the lake remains above the freezing point — and the thawing continues throughout the Terra chat cordoba argentina gratisgood dating usernames for guys. Scientists have speculated for some time now that this could have a major impact on the atmospheric greenhouse gas balance, since compared to carbon dioxide, methane has 30 times the climate-warming effect.
The team has for the first time precisely quantified the additional amount of greenhouse gases produced in this manner, for all permafrost regions around the globe. To do so, they took random samples of the gases being released at various lakes. Katey Walter Anthony et al. The Alfred Terra chat cordoba argentina gratisgood dating usernames for guys Institute pursues research in the useranmes regions and the oceans of mid and high latitudes. As one of the 18 centres of the Terra chat cordoba argentina gratisgood dating usernames for guys Association it coordinates polar research in Germany and provides ships like the research icebreaker Polarstern and stations for the international scientific community.
Downloads Arctic lakes jpg gratistood MB. Arctic lakes jpg 3 MB. An expanding thermokarst lake jpg gratishood MB. Arctic lakes jpg 5 MB.
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