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Pages 151-151

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From page 151...
... Our intention here is not to review the field of environmental radioactivity but rather to point out that over land the ionization in the PBL depends primarily on ground radiation and radioactive gases and to emphasize the necessity of studying the geographical variation of ground radioactivity and the dynamics of the dispersion of radioactive gases if we are to understand atmospheric electricity in the PBL. Over the oceans far from land the ionization rate is determined solely by cosmic rays.


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