APPENDIX 8 WIND VECTORS The following wind vector representations (iigse B,1 to B.5) are drawn from data furnished by the Joint Task Force Seven Air Weather Service at Eniwetok to Task Group 7.1. These drawings represent the wind vectors taken at 2000-ft vertical intervals up to 20,000-ft and 5000-ft vertical intervals from 20,000 ft up to the altitude at which data were no longer taken. These vectors show the general wind conditions existing in the vicinity of the shot atolls at about the time of each shot. Contamination on the shot atoll can be adequately explained by observing these wind vectors. More refined patterns based on particle settling rates are not applicable to this experiment, since within the relatively small area sampled no trends of particle size with distance from ground zero or with time after shot were found in the analysis of the samples. 115