03-18-2012, 11:41 AM
This is a particle debris plume, over ocean currents.
It is also very important to remember that there are different Half Life times associated with different emission isotopes, the 2 most common emission isotopes from Fukushima Daiichi were Iodine 131 (~8 day half life) & Cesium 134 (~2 year half life), added to the dilution potential of the Pacific Ocean. Probably the air plume last year was more to worry about than the ahi next year...
just for those data geeks, link to half life times for different isotopes:
http://www.iem-inc.com/toolhalf.html
It is also very important to remember that there are different Half Life times associated with different emission isotopes, the 2 most common emission isotopes from Fukushima Daiichi were Iodine 131 (~8 day half life) & Cesium 134 (~2 year half life), added to the dilution potential of the Pacific Ocean. Probably the air plume last year was more to worry about than the ahi next year...
just for those data geeks, link to half life times for different isotopes:
http://www.iem-inc.com/toolhalf.html