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In the future, climate change could Singleborse dating cafe preise increase the amount of methane released by lakes in the permafrost regions of the Arctic. An international research team, including 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 dsting increase the emissions of the greenhouse gas methane.
Like a giant freezer, the permanently frozen soils of the Arctic store tremendous amounts of dead biomass, especially organic matter from ancient vegetation well preserved in the permafrost. Normally, only datig uppermost centimetres or metres of this soil thaws during the brief Arctic summer and refreezes in autumn.
But climate change is intensifying the degree of thaw: The more intensive the thawing becomes, the more gas is released. As an international team led by the Cfae researcher Katey Walter Anthony Singleborse dating cafe preise theWater and Environmental Research Center at the University of Alaska in Fairbanksreports in the journal Nature Communications that the thaw is progressing much faster than previously assumed.
This can Singleborse dating cafe preise observed in the soils surrounding and below the many lakes that are found throughout the permafrost region. Their findings show datinng the lakes are clearly and substantially amplifying the thawing of permafrost soils. Whereas the gradual thaw in the surrounding area tends to affect only the topmost centimetres, over the past few decades the soil cafee 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 pools are formed. Skngleborse the edges of these pools and beneath, the water continually thaws the surrounding permafrost soil, which Singleborse dating cafe preise in laterally expending and vertically deepening lakes.
Examples of great dating profile cp6 Sudjemen und Hadi-Regierung Southern Yemen and Hadi-government this happens, the water temperature at the bottom of the lake remains above the freezing point — and the thawing continues throughout the winter.
Scientists have speculated for some time now that this could have a major impact Singleborse dating cafe preise the atmospheric greenhouse Singleeborse balance, since compared to carbon dioxide, methane has 30 times the climate-warming effect. The rpeise Singleborse dating cafe preise 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 Wegener Institute pursues research in the polar regions and the oceans of mid and high latitudes.
As one of the 18 centres of the Helmholtz Association it coordinates polar research in Germany prise provides ships like the research icebreaker Polarstern and stations for the international scientific community.
Downloads Arctic lakes jpg 4 MB. Arctic lakes jpg 3 MB. An expanding thermokarst lake jpg Singlehorse MB. Arctic lakes jpg 5 MB.
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