3 a. Fallout without precipitation near the coreof the trade wind portion of he cloud after one day may be ced a lieedeeae of the order of 1 x 10° d/m and perhaps 1 x 10° in rain. . The period of deposition in each case is 2hours. thuestnade. b. Under very special weather conditions in the Hawaiian Islands, the rainout might be of the order of 1 x 10’ d/m or a dose of 10 roentgens. integrated over thirteen weeks. iJnis is based on the maximm ' painout activity at Albany-Troy during Upshot-Knothole and a scaling factor (to megatons). ¢. Based on the rainout over Washington, D.C. and HL _ Rochester, N. Y., during GREENHOUSE DOG test and the ‘appropriate scaling factor is estimated the highest activity in rain expected it for the United Stages from a test the size of MIKE is of the order of 1LOo~ d/m. d. Radioactivity from fallout or rainout for almost any populated area of the earth, outside of the North ‘Pacific, appears to be negligible. Eastern and southeastern Asia appears to be the only area in which the peak surface deposition for o « ne day might be greater than 10° d/m. 7.3 | SUMMARY OF METEOROLOGICAL ANALYSIS Meteorological data and analysis were employed to explain the world-wide distribution of atomic debris. The limited success of this attempt leads to the following conclusions. a. The radiological data, if correct, has indicated a few cases in which the meteorological estimates of speed were too low, due partly to complicated three- dimensional motion that cannot be deduced from the available data. ‘tests more than a few days or at elevations above about. ho, 000 feet. ce. There appears to be no way of determining whether any of the stratospheric debris has been transported to the ground. Such data would yield important information concerning the exchange of matter between. the stratosphere and the troposphere. - S7 «- cy hesaleieal, bd. It is not possible to use meteorology at present adequately to track the atomic clouds from Pacific ms :