Climate and Forecast Standard Names
"Radioactivity" means the number of radioactive decays of a material per second. "Radioactivity concentration" means radioactivity per unit volume of the medium. "Pm" means the element "promethium" and "151Pm" is the isotope "promethium-151" with a half-life of 1.18e+00 days.
Mapping to be determined
radioactivity_concentration_of_151Pm_in_air