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Leucochloridium Paradoxum

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Mimosa Pudica

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Maratus Speciosus

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Our home

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La mue de quelques animaux

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Balaenoptera musculus

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La différence qu'un petit groupement méthyle peut faire.

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Comment les hormones influencent nos émotions.

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Des champignons "plastiquophage"

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Vantablack

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Popular Science Stock Photos and Pictures - Science Photo Library

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We have selected some of our favourite new images submitted last year, showing examples from all areas of science including healthcare, technology, space, the environment and everything else. Our selection covers ordinary photography and is especially strong on specialist imagining techniques such as x-rays and diagnostic scans.

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Drosera

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Un poisson "magnétique" : le remora

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La chimère Troll

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Naissance d'une coccinelle : nymphose et métamorphose en accéré

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Wind directions in Japan are currently blowing radiation from the troubled Fukushima nuclear power plant eastwards out to the Pacific Ocean (see Figure 1), but a shift in directions Sunday risks sending the radiation plume towards Tokyo (see Figure 2). These models have just been published in a bulletin by Austria's weather service, the Central Institute for Meteorology and Geodynamics in Vienna.

On the colour scale, red represents 100 millisieverts per hour (100 mSv/hr), and purple a maximum of 100 nanosieverts per hour (.0001 mSv/hr). For an explanation of the units see ""http://blogs.nature.com/news/thegreatbeyond/2011/03/fukushima_crisis_radiation_exp.html">Radiation exposure, beyond the numbers". In terms of dose, an exposure of 100mSv is enough to slightly increase the chances of developing cancer later in life; a dose of 100 nanosieverts is neglegible.

Figure 1: Plume as of today, and tomorrow.

<IMG SRC="http://www.zamg.ac.at/pict/aktuell/20110318_bild1_2.gif"

Figure 2: Plume as of Sunday

<IMG SRC="http://www.zamg.ac.at/pict/aktuell/20110318_fuku_I-131-Bild3.gif"

There is also some radionuclide data coming out of station RN38, in Takasaki/Gunma. The station is operated by the Comprehensive Test Ban Treaty Organization (CTBTO) (see the long article I published yesterday on CTBTO data for more details on its data) and recorded many species of radionuclides on 15 March, including iodine-131 and Barium-140, with a preliminary estimate of the concentration of iodine-131 at 15 becquerels per cubic meter. That's a fairly low dose. Radioactive iodine-131 was also detected at the Petropavlovsk station in Russia, but at fourfold-lower levels. That should pose no threat to human health, though its very presence is troubling.

Below is an animation of the plume's predicted path:

For full coverage of the Fukushima disaster, go to Nature's news special.
Images: Central Institute for Meteorology and Geodynamics

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Fukushima Crisis: Latest maps of spread of radiation plumes in Asia-Pacific

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Wind directions in Japan are currently blowing radiation from the troubled Fukushima nuclear power plant eastwards out to the Pacific Ocean (see Figure 1), but a shift in directions Sunday risks sending the radiation plume towards Tokyo (see Figure 2).

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Un phagocyte part à la chasse à la bactérie