Although the winds, in general, were similar to those of the previous bursts, the westerly winds just below the tropopause attained higher speeds than had occurred during the previous tests, 55 to 65 knots at 40,000 feet. Trajectories are shown in Figure 2.6, Debris reached Mextco Gity on May U, and falloutwas widespread over the western plains states and the Rockies by May 9. Fallouv from this burst continued over the western half of the United States (with the exception of the Pacific Coast) in significant amounts for a period of more than a week. The fallout from Yankee in this Region exceeded, by almost an order of magnitude, the fallout from any of the other tests of the series. The westward moving debris appeared to proceed faster than indicated by the low-level trades, reaching Koror by May 6 and Singapore by May 9. Again, it is very possible that high-level easterlies carried the debris, since the - 25-30 knot winds required are somewhat faster than expected in the trades of the Western Pacific. 2.6 NECTAR The last test of the series, Nectar, was the only burst detonated from Eniwetok. It occurred at 1820 GCT, May 13, 195k, Tha maavltion ated secehe gp 7A Tre PekeT OThe wae easterly winds extend bo cu,we ivet, with Lignt westerlies abov.. to the base of the stratosphere. The trajectories from this burst (Figure 2.7) began with a slightly greater component towards the north then for the previous bursts. Since Yankee and Nectar were separated by only nine days, it is virtually impossible to distinguish between debris from the two bursts. An attempt to separate the two sources of debris was made for the first week following Nactar, but. was not attempted bayond this time. Dafly fallout maps for the remainder of the month, May 22-31, are given with all data extrapolated to 100 days after Nectar because of the arbitrary system of burst assignment used. However, it is likely that the major portion of the fallout reported on these days originated from Yankea. To convert the reported activity to 100 days after Yankee, assuming the debris originating from Yankee, the values given on the maps should be increased by about 30-Lak. -15-