Increased environmental gamma-ray dose rate during precipitation: a strong correlation with contributing air mass

Development and deployment of an underway radioactive cesium monitor off the Japanese coast near Fukushima Dai-ichi

“…Rain washout of radon daughters is known to increase ambient dose rates in terrestrial settings (Mercier et al, 2009), but at this time it is unclear to what extent these radionuclides, namely 214 Bi, may have contributed to the measured fluctuations of radioactivity throughout the cruise.…”

Detecting changes in maps of gamma spectra with Kolmogorov–Smirnov tests

“…Two options are to smooth spectra in space [16] or to use a spatial false discovery procedure [17,18]; it is not clear which will bring the greatest benefits, but either method would further improve sensitivity. We can also incorporate automated energy calibration [19] and rain detection [7] to better estimate background spectra with less variance.…”

Performance of data acceptance criteria over 50 months from an automatic real-time environmental radiation surveillance network

“…It is known that several natural causes affect the radiological measurements (Mercier et al, 2009;Smetsers and Blaauboer, 1997;Blaauboer and Smetsers, 1997;Gómez et al, 1996;Smetsers and Blaauboer, 1994). Some of these are rainfall, wind, temperature, humidity, air pressure and variations in the cosmic radiation intensity.…”