Saturday, May 18, 2013

Fukushima Update - Study: Concentrated Radioactive Plume on narrow path toward U.S. — Same latitude as Northern California (MAP)

Study: Concentrated Fukushima radioactive plume staying on narrow path toward U.S. — Moving with surface water along 40 N — Same latitude as Northern California (MAP)


Study: Concentrated Fukushima radioactive plume staying on narrow path toward U.S. — Moving with surface water along 40 N — Same latitude as Northern California (MAP)

http://www.biogeosciences.net/10/3067/2013/bg-10-3067-2013.pdf
Published: May 17th, 2013 at 3:51 pm ET
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Title: Surface pathway of radioactive plume of TEPCO Fukushima NPP1 released 134Cs and 137Cs
 
Source: Biogeosciences
 
Authors: M. Aoyama, M. Uematsu, D. Tsumune, and Y. Hamajima
Date: May 7, 2013

[...] The main body of radioactive surface plume of which activity exceeded 10 Bq m−3 travelled along 40° N and reached the International Date Line on March 2012, one year after the accident. A distinct feature of the radioactive plume was that it stayed confined along 40° N when the plume reached the International Date Line. [...]

A distinct feature of the radioactive plume was that it stayed confined along 40 N when the plume reached the International Date Line, as stated in Sect. 3.2. The radioactive plume travelled 1800 km (from 160 E to 178 E) for 270 days (9 months) (Fig. 5); therefore, an average zonal speed (u) of the surface radioactive plume was calculated to be about 8 cm s−1 which was consistent with the speed of the reported surface current of 4–16 cm s−1 in the region (Maximenko et al., 2009). [...]
We can also assume that the Fukushima radioactive plume moved with surface water [...]

Full study here

Published: May 17th, 2013 at 3:51 pm ET
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38 comments

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