Tuesday, 17 July 2012

Fukushima Radiation On West Coast of North America Could End Up Being 10 Times HIGHER than in Japan

In 10 Years, Peak Cesium Levels Off West Coast Could Be 10 Times Higher Than at Coast of Japan

We’ve extensively documented the fact that ocean currents bring Japanese radiation to the West Coast of North America, and that – rather than adequate ocean dilution -  there could be “pockets” and “streams” of highly-concentrated radiation.
Joke F Lübbecke of the National Oceanic and Atmospheric Administration’s (NOAA) Pacific Marine Environmental Laboratory and 3 scientists from the GEOMAR Research Center for Marine Geosciences poured tracer dye into coastal waters off of Fukushima, and monitored its progress as it traveled to the West Coast of North America, to find out what might really happen.
They have revealed their results in a new paper published by journal Environmental Research Letters.
The paper shows that the West Coast of North American could end up with 10 times more radioactive cesium 137 than the coastal waters off of Japan itself.
How could radiation levels be lower closer to the source of contamination: Fukushima?
Because the currents are swift off of the Eastern coast of Japan, and quickly move the contaminated water away.

The paper explains:

In the following years, the tracer cloud continuously expands laterally, with maximum concentrations in its central part heading east. While the northern portion is gradually invading the Bering Sea, the main tracer patch reaches the coastal waters of North America after 5–6 years, with maximum relative concentrations ( > 1 × 10−4) covering a broad swath of the eastern North Pacific between Vancouver Island and Baja California. Simultaneously some fraction of the southern rim of the tracer cloud becomes entrained in the North Equatorial Current (NEC), resulting in a westward extending wedge around 20°N that skirts the northern shores of the Hawaiian Archipelago. After 10 years the concentrations become nearly homogeneous over the whole Pacific, with higher values in the east, extending along the North American coast with a maximum (~1 × 10−4) off Baja California. The southern portion of the tracer cloud is carried westward by the NEC across the subtropical Pacific, leading to increasing concentrations in the Kuroshio regime again.
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Radiation On West Coast of North America Could End Up Being 10 Times HIGHER than in Japan

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