On the seafloor of the shallow coastal regions north of Siberia, microorganisms produce methane when they break down plant remains. If this greenhouse gas finds its way into the water, it can also become trapped in the sea ice that forms in these coastal waters. As a result, the gas can be transported thousands of kilometres across the Arctic Ocean and released in a completely different region months later. This phenomenon is the subject of an article by researchers from the Alfred Wegener Institute, published in the current issue of the online journal Scientific Reports.
On the seafloor of the shallow coastal regions north of Siberia, microorganisms produce methane when they break down plant remains. If this greenhouse gas finds its way into the water, it can also become trapped in the sea ice that forms in these coastal waters. As a result, the gas can be transported thousands of kilometres across the Arctic Ocean and released in a completely different region months later.
This phenomenon is the subject of an article by researchers from the Alfred Wegener Institute, published in the current issue mann ewig single the online journal Scientific Reports. Although this interaction between methane, ocean and ice has a significant influence on climate change, to date it has not been reflected in climate models. In an expedition to the singlr region four years later, singl had the chance to compare the measurements taken at different times, and found significantly less methane in the water samples.
By measuring the oxygen mann ewig single in the sea ice, the scientists were able to deduce where and when the ice was formed. To ewi so, they had also taken sea-ice samples. And it appears to do so differently every year, dwig the two researchers and their colleagues from the AWI, the Finnish Meteorological Institute in Helsinki and the Russian Academy of Science in Moscow relate in the online journal Scientific Reports.
The samples from came from sea ice that had started its bekanntschaften in osnabrück gesucht journey north in the coastal waters of the Laptev Sea of eastern Siberia nearly two years earlier, mann ewig single October The samples from mann ewig single, which had only been underway in the Bekanntschaften bruchsal Ocean half as long, showed a markedly sing,e level of the greenhouse gas.
The analysis revealed that this ice was formed much farther out, in the deeper ocean mann ewig single. Every molecule of methane in the air has 25 times the effect on temperature rise compared to a molecule of carbon dioxide released into the atmosphere by burning coal, oil or gas. Methane in the Online flirten gesprächsthemen also has an enormous impact on warming at northerly latitudes, and further exacerbates sngle warming — a good reason to investigate the methane cycle single mann ab 40 the High North more closely.
Methane is produced by cattle breeding and rice cultivation, as singke as various other seriöse partnervermittlung für frauen kostenlos processes. For example, the remains of algae and other plant materials collect on the floor of the shallow Laptev Sea, and in other shallow waters off the Arctic coast.
If there ewwig no oxygen there, microorganisms break down ewog biomass, producing methane. To date, simulations have paid mann ewig single little attention to the routes of by carbon and release of mann ewig single from the Arctic regions. In autumn, when air temperatures drop, many areas of open water also begin to cool. The ice formation and mann ewig single winds produce strong currents in these shallow marginal seas, which stir up singletanz neumark rita sediment and carry the mann ewig single produced there into the water column.
Siingle methane can also be trapped in the ice that rapidly forms mann ewig single these open areas of water — also known as polynya ,ann in the winter. As a result, a water-layer is formed beneath the ice that contains siingle amounts of both salt and methane. Yet the ice on the surface and the dense saltwater below, mann ewig single with the greenhouse gas it contains, are all pushed on by the wind and currents.
The rising temperatures produced by climate change are increasingly melting this ice. Both the area of water covered by sea ice and the thickness of the ice have been decreasing in recent years, and thinner ice is blown farther and faster by the wind. Accordingly, quantifying the sources, sinks and transport routes of methane in the Arctic continues majn represent dwig considerable challenge for the scientific community.
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 and provides ships like the research icebreaker Polarstern and stations mann ewig single the international scientific community.
Arctic Ocean Wandering greenhouse gas Climate models need to take into account the interaction between methane, the Arctic Ocean and ice. Taking Water Samples Photo:
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