UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Date Entered . oi REPORTDOCUMENTATION PAGE NUMBER BERREADINSTRUCTIONS . GOVT ACCESSION NO] 3. RECIPIENT'S CaTatosc numeza NYO-4645 (EX) [ @. TITLE (and Subtiiioc) 8. TYPE OF REPORT & PEMOD COVERED WORLD-WIDE FALLOUT FROM OPERATION CASTLE 6. PERFORMING ORG. REPORT NUMBER NY0-4645 (EX) [7.auTnonce) 6. CONTRACT OR GRANT NUMBE Me) | Robert J. List sat 10. PROGRAM ELEMENT. PROJECT, TASK 9. PERFORMING ORGANIZATION NAME AND ADORESS AREA & WORK UNIT NUMBERS Weather Bureau Washington, D. C. tt. CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE United States Atomic Energy Commission Technical Information Service May 17, 1955 13. NUMBER OF PAGES . MONITORING AGENCY NAME 8 ADORESS/(i! different from Controlling Office) 18. SECURITY CLASS. (of thie report) Oak Ridge, Tennessee UNCLASSIFIED Se.DECL ASSIFICATION/ DOWNGRA SCWHEOULE COMNGRADING AS 16. CUSTRIBuUTION STATEMENT (of this Report) Approved for public release; unlimited distribution. 18. OISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different trom Report) SUPPLEMENTARY NOTES This report has had the classified information removed and has been republished in unclassified form for public release. This work was performed by Kaman Tempo under contract DNA001-83-C-0286 with the close cooperation of the Classification Management Division of the Defense Nuclear Agency. 19. a 17. roa ¢ KEV WORDS (Continue on reverse side if necessary and identily by block number) Operation CASTLE World-Wide Fallout following Operation Castle. Although meteorological data were poor, a general connection of tropospheric flow patterns with observed fallout was evident. There was a tendency for debris to remain in tropical latitudes, with incursions into the temperate regions associated with meteorological disturbances of the predominantly zonal flow. As the season advanced, such incursions became more evident. Outside of the tropics, the southwestern United States received the greatest total fallout, about five times that received in Japan. DD [anos 1473 evition oF 1 nov 6818 oBsoLETE UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) wee} 20. ABSTRACT (Continue an reverse side if necessary end identity by biock number) A world-wide network of gummed film stations was established to monitor fallout