_ 4 Other things belng equal, the higher the tempercture of the fireball ond the — gtecter its size, the greater will be the horizontal extent of the circulation. With the ~~ -~ berger bombs, provided they are exploded in an atmosphere with pronounced cyclonic "shear, @ cyclonic ‘system of opproximately the size and ‘atensity of the weaker tropical depressions of the Marshall Islands could be set up. Whether such a system could , ever become self-perpetuating, through the supply of energy set free by condensation, is a matter about which it Is Impossible to reach definite conclusions as yet; ot the same time, if most be said that the triggering of such a self-sustaining circulation is not af all impossible. The energy for the circulation would be derived, not from thet Initially released in the fireball, but from the atmosphere, the energy source of tropical -depressions and typhoons. Comparisan of the relative energy relecse of typhoons and noclear (or thermonuclear) devices is therefore irrelevant. BOMS MATERIAL CAP CLOUD MOVEMENT -VORTEX RIN "SKIRT" FORMED BY CONDENSATIO IN UPPERMOST LAYERS. - STEM MATERIAL, CHIEFLY DUS AND, DEBRIS ! Figure 3: Cross-section showing morphology of a high level cloud during ascent through an atmosphere relatively dry in the lower layers. LoPign ‘pe BePOE

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