On the effects of the ocean fukusimskaya tragedy far ahead of Chernobyl

Radiation levels in the oceans in 1990. This is mainly the result of nuclear weapons tests. (Here and below the data Woods Hole Oceanographic Institution.)

Ongoing debate on the extent of the accident at the Japanese nuclear power plant "Fukushima-1" in the earthquake and tsunami on March 11. Officials assigned catastrophe "seven" on the international scale, that is, recognized that she went to Chernobyl level, although it does not prevent officials say that comparisons with Chernobyl incorrect.

Ken Busseler of Oceanographic Institution, Woods Hole (USA) believes that, at least on the impact of the ocean fukusimskaya tragedy has left Ukrainian accident behind.

Radionuclides in seawater of drain channel stations were found in 5-10 km south of the "Fukushima-1" and 30 km from the coast. "Levels of some radionuclides at least an order of magnitude higher than in 1986 in the Baltic and Black Seas" — said the researcher, received a grant by the National Science Foundation of the USA to study the background concentrations of several radionuclides in the Atlantic and Pacific oceans. Exact figures will be known upon completion of work.

After Chernobyl, science has become much more aware of the fate of radioactive debris that fall into the oceans. By the way, now on it will learn how to quickly mix ocean water and accumulated sediment. "After Chernobyl, they measured not only in places where emissions could fall plant, but even in the north Pacific Ocean," — said Mr. Busseler.

Since the atmosphere and ocean are linked, scientists expect falling of atmospheric radionuclides in water, albeit at very low levels, adds Henrietta Dulaeva University of Hawaii (USA), received a similar grant. "After the accident there was a situation with which we live for many years — emphasizes Don Rice from the National Science Foundation. — The sooner we sort out what this situation for the better. "

Meanwhile, experts shtudiruet data March 11 earthquake, calling to closely monitor seismic activity in the Ibaraki prefecture, located immediately south of the epicenter. Team leader Mark Simons of the California Institute of Technology (USA) asks not consider this prediction new push. Just fukusimskoe earthquake occurred where it did not expect, and it has forced scientists to take another look at other similar regions.

According to police, an earthquake of magnitude 9.0 and the ensuing tsunami killed 15,019 people. Another 9,506 are still missing. In addition, the radiation leak at the nuclear power plant "Fukushima-1" made of 80 thousand people from their homes in the 20-kilometer zone indefinitely.

Satoshi Ide of the University of Tokyo (Japan), and colleagues report in the journal Science, that the March earthquake started with a little shake in the first three seconds. Then there was a deep 40-second break, which again changed the small movements, lasting around 60-70 seconds. After that lasted more than 100 new deep gap.

On the effects of the ocean fukusimskaya tragedy far ahead of Chernobyl

Human sources of radiation in the ocean compared to the natural.

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