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helth and &f&y Divirlon The worldwide falicat monitorlq progtaa ror 3perstlon IVY CII otiardlnated by the Rew York Opnrstionr Offib. at tha requert of tha Dlvlalon of Biology and MediOiao~ When the plan 5OC mll*a from Bnlwetok wan alaltn*d to IWOO. It no aontemplatod that Joint fmrk Foror 132 would monitor the lrlandr rithln thlr inoludo all of’ the l#landr of’ the Trurt Territory woapt lnlntok The ronltorlng progru employed a rorldrida network of 111 rtatlonr loonted on *I1 contlnantr but oonoantratod in the northern healrphero, and l ryetai for aorlal monltorln& or the m8twn h0iri0. the latter feature of the pro(ru ma dovired to moot Um rquirrant ror pu?ok and reliable redlation noawr.- tnrtrummt@ of l typo rrhioh -10 not myvhwo lrallable la Septombor, 1952, when tha tierion na aralgn*d to NUO. The program bar rqulred the ooopntioa of l dlrerie lirt of orgrniratlonr rhlob, in addition to the Dirirlon of Biology and kdloiao and Joint TmP ?oror 132, Ineluder the kathor Bureau, thr Air Foroe, Naq and Coart Guard, the Caludlas Lathor Swrioe and the AtWo Boab Carualty Collarion. lbrt of at whloh our data wore obtslned, Tha Iwy provided llrortift for for Health and Safety Diririon perronnsl in t..e Aolflo. The 8peclal Rojootr Sootion, 0. A, Weather Burwu, rurnlrhed oloud trr>aotory informtlon and I’or.iaarte aa L part of our joint lssL8tanoe to the photograph10 indubxy. They arm rrulyrfng the monitoring data and their flndlngr ~111 be reported
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M), dab for wslmtmg the ltfwtr of mdlomtiw dobrlr on oounting of daily rattled durt uplm fra l worldu?~ 4Amrk of 107 station., and by radiation uamuommtr rfth rpwially deaignrd inrtnwntr, in fllgbtr owr the north holflo lrlaadr.. _ The higbrst & hour hllout a~ 5,600,OOC woq it MIXBand for the nwt 51 tiym. Dlrporrion of thr mdimotiw aloud throughhoutthe mrld ltmorphro lppere to hare beon rrmnti~lly oaplrted during the reoond two wwkm. CwLttirm hllout to Jmmry 1, 1953, lroordod 10,000 d/daq Pt lt fire looatlonr and na In the hundredr or lor thouwadr at nouliy awry ruiniq Ctetl6x0 Conorntrrtionr of radioaotin dart, aowured in Dmry rntro ware approxiutmly proprtionnl to the 1.h power of the &gm OC the lotlrlty, iartmd of the 1.2 power
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the k&alla, the Cl~olInor, the krianao, the Japasoae lalmdr the oovorage protided for in the orIgIna curvy dmlgn (3) p1t.t additional f’llghtr to the north snd northwart of the Yrianaa. Tha l&tar fllghtr nro undwtakon on the baolm of wcrarunta northern bdp of thr fallout aon*. Tha rooonrulrunor in thil Foll&s( Km, a haa l xtoarirr, WI wy, lllitad to the Yroklla, rir, laatwn Carolin~r and tho Yrirnsr ww mdo. Vnutr of the *bore flight* a~) deferred to Chapter 2, lo that thr monitoring raaltr, rtrioh fork part of the rubfoot rttor of that ohapter. my bo prowntod on the uo rpr 1.1, oonrIrtIn(l of’ l g- doteotor and a rwxarding unit, was daripted aad fabrioeted rithin the Aulth aad Surety Mvlcton.
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motivity, on Ih8 prdro that the 8olntllos rwdiq8 TWO & artlret to rlrdiatloa fron the ground A -her. but w hto m
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To Pacllltate ld~atlfioation of the Mation the data The rprwd. of fallout around the glob* was follorsl . . tlrlty cleal; C,?eaterthan normal. The dater, uppd In F&are 2.11, rhor how th. dabria aproad around tho world. rig. 2.12 follow the i+-ovamoot of r*dloaatl- dabrir within the Unltsi 2.2.1 hllout during thr First Flftmn Dxyr after YLII me avera&. fallout in the United gtatea during thir Mart of the activity contributing to thr latter figure felt at Iwo Jir on the thlrd, fourth md fifth dayr tit..r IIXI. rho fallout on thll island me found to be 83,000 a/deq ft on the of 165,000 d/daq ft on Jmumry lst, due to iaiiout on the irth to th. day the fallout ooourred. 2.2.2 Fallout Curia& the Eaoond Fiftmn Deyr The drop la the worlMdo lrwq,e ic duo almort lnflroQ to dooreared falLout at Iwo Jima. If thlr ialan had not bean lnoluded, th. lvmwgm for ths first fiftwn &yr would hara bma only 2300
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Decay rata da:a fer 23 gwmwd paper samples fielded an avertrge rall~e for the uponsnt of ths time of - 1.37. The values of the decay elope calculatad from counts of tm filtered dust samples uers - 1.19 ti - 0.95. In FQure 2.U the actfelties of typical samples are plotted a&nst the age of the aaterial (&~a after KIKE). We harr not disctvered the ciuw of ths regular fluctuations, We am unable to rule out the pos3Fbilit.y that it 1s due ta aome unhwm hi.88 in the counting procedure. Ike value of the decay r&to exponent was the lnst piece of inforration obtained. It was wt. use4 for extrapolation which was based, instead,
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plattwi Qalnrt time, rhowIng the rhrp rlasr after ea:h weapon, teat aerlaa and the auhraquent falling off due to droay. It 10 lntwdad to show the aoclrulatad rmdioaollrity on the ewth’a eurfaoe in the northeastern United Starer, neglecting redirtribution due to min. The poakr would be higher If it mre praotioal to plot the portionr of the ours corrarponding to the weapona teat parlodr. 1. nro4505 ‘Radioaotf.ra Dabrir from Operationa Tumblw and (SSCRET) Jan@ - January 28, 1952, Bealth lud Safety Diririon, “Radiorotlre Debris from Opwatlcnr Tumbler and IJ. 9. Rarthsr Durmu, February, 1953.
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