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Displaying Tag 'atmospheric'
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Researchers at the University College Dublin in Ireland, the Smithsonian Institute in Washington DC in the United States and the “Oxford University in the United Kingdom have detected a sudden decrease in plant diversity in the Former Greenland, there are 200 million years, coupled with a relatively small increase in the level of atmospheric carbon dioxide.
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After impact the asteroid that hit the earth’s surface 65 million years ago, nearly 80% of marine life became extinct and the climate cooled dramatically. An international team of researchers in Science now reveals that the ocean, marine productivity or photosynthesis recovered in less than a century.
The new geochemical study by researchers at the University of Bremen (Germany), the Massachusetts Institute of Technology (MIT, its acronym in English), and the University of Jena (Germany) shows that photosynthesis, the basis of the marine food web, was only interrupted for 100 years, so that his recovery was “surprisingly” fast.
“The oceans were able to recover quickly after the environmental disaster associated with impact of the meteorite, and apparently could reorganize ecosystems very rapidly,
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 What may be more common than the study of daily weather forecasts? However, it would be useful in many cases not only predict weather changes, but also to control them. It is doable to some extent. For example, if the weather is required on a small plot of land, a special reagent is dispersed by aircraft above the clouds. But if something more complicated is needed – the experts are still unable to control time. In early June, for example, Moscow has seen several hurricanes. Meteorologists have known that cumulonimbus clouds approaching Moscow and they have storm alerts, a significant destruction was avoided. It would be interesting to prevent the occurrence of such events.
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 The carbon dioxide from human activities is largely responsible for the increase in atmospheric temperature: This point is widely recognized in the scientific world and the general public for many years. Less publicized but equally disturbing, CO2 is also the origin of a process of acidification of the oceans with consequences on wildlife and marine life can be considerable.
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 Researchers at the German Center for Aerospace Research (DLR) in the specialized field of marketing have made visible to hypersonic flows. They made their measurements in high enthalpy wind tunnel (HEG) Gottingen, following a procedure for measuring optical velocity field.
To achieve this, the DLR researchers have used the method of image velocimetry of particles (PIV), originally developed for low speeds. The principle of PIV is the method of seeding the flow with very fine particles and briefly illuminate these particles using a laser cutting plan.
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