Document Details


Title:
OPERATION GREENHOUSE, SCI DIR REPORT OF ATOMIC WEAPON TESTS AT ENEWETAK, 1951: ANNEX 4.1 - CLOUD STUDIES; PARTS I, II, & III (DELETED)
Author(s):
ANDERSON, C E [AIR FORCE CAMBRIDGE RESEARCH CENTER]; GUSTAFSON, P E [AIR FORCE CAMBRIDGE RESEARCH CENTER]; MCPHERSON, P E [UNIVERSITY OF CALIFORNIA, LOS ANGELES]; MCKOWN, R E [UNIVERSITY OF CALIFORNIA, LOS ANGELES]; KELLOGG, W W [UNIVERSITY OF CALIFORNIA, LOS ANGELES]
Subject Terms:
GREENHOUSE OPERATION; RADIOACTIVE CLOUDS; RESEARCH PROGRAMS; MEASURING METHODS; PHYSICAL PROPERTIES; AIR; CLOUD TRACKING; PHOTOGRAPHS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1951 Dec 31
Declassification Status:
Sanitized
Document Pages:
0179
Accession Number:
NV0051045
Document Number(s):
WT115EX
Originating Research Org.:
AIR FORCE CAMBRIDGE RESEARCH CENTER
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE CLOUD-PROJECT WAS PRIMARILY INTENDED TO FULFILL A REQUIREMENT FOR DETAILED INFORMATION ON THE METEOROLOGICAL MICROSTRUCTURE OF ATOMIC CL OUDS. THIS REQUIREMENT AROSE FROM THE SPECULATION THAT RADIOACTIVE MA TERIAL COULD BE DEPOSITED BY THE SCAVENGING ACTION OF RAIN FALLING FRO M THE ATOMIC CLOUD. MORE FACTUAL INFORMATION WAS REQUIRED ON THE PROP ERTIES OF ATOMIC CLOUDS BEFORE DEFINITE ANSWERS COULD BE GIVEN TO THES E QUESTIONS. WITH THE TIME AVAILABLE, ADVANTAGE HAD TO BE TAKEN OF EX ISTING EQUIPMENT RATHER THAN WAIT FOR THE DEVELOPMENT OF MORE SUITABLE GEAR. AEROGRAPHS WERE CHOSEN AS THE TEST EQUIPMENT SINCE THEY OFFERE D THE BEST SOLUTION TO THE MANY CONDITIONS. THESE DEVICES WERE INSTAL LED IN THE DRONE AIRCRAFT, AND THEY OPERATED SATISFACTORILY IN EACH OF THE AIRCRAFT ON ALL TESTS. THE EQUIPMENT MEASURED AND RECORED THE AI RSPEED, AIR-TEMPERATURE, RELATIVE-HUMIDITY, AND STATIC-PRESSURE PARAME TERS. INSPECTION OF THE RECORDS LED TO THE CONCLUSION THAT THE MAJORI TY OF THE DRONES PENETRATED THE STEM CLOUD BENETH THE MAIN MUSHROOM CL OUD. CONFIRMATION OF THIS CONCLUSION WAS OBTAINED FROM THE DIRECTOR O F PROGRAM 4, WHO STATED THAT THE FLIGHTS WERE PLANNED THIS WAY SINCE I T WAS FEARED THAT SEVERE TURBULENCE IN THE MAIN CLOUD WOULD CAUSE A HI GH LOSS OF DRONE AIRCRAFT. ANALYSES OF DATA OBTAINED BY THE AEROGRAPH EQUIPMENT REVEALED THE FOLLOWING CONCLUSIONS CONCERING THE METEOROLOG ICAL PROPERTIES OF ATOMIC CLOUDS. 1. THE CLOUD PROPERTIES DEPENDED G REATLY ON THE CONDITIONS IN THE ENVIRONMENT AIR, PARTICULARLY THE MOIS TURE CONTENT. THE STEMS OF BOTH DOG AND EASY CLOUDS WERE FOUND TO BE DRY. GEORGE CLOUD, WHICH WAS FORMED IN AIR HAVING HIGH HUMIDITIES UP TO 10,000 FT, HAD A STEM CLOUD COMPOSED OF WATER DROPS. 2. THE TEMPE RATURES INSIDE THE STEMS, EVEN AT RELATIVELY SHORT TIMES AFTER THE EXP LOSIONS, DIFFERED VERY LITTLE FROM AMBIENT TEMPERATURES. 3. THE CIRC ULATION OF AIR INSIDE THE STEM WAS SIMILAR, PERHAPS, TO THE CIRCULATIO N INSIDE THE CORE OF INTENSE CUMULO-NIMBUS CLOUDS. 4. THE POSSIBILIT Y OF RAIN FALLING FROM AN ATOMIC CLOUD WAS EXTREMELY REMOTE, EVEN IN T HE EVENT OF SEEDING. THE ROOT CLOUDS ASSOCIATED WITH THE LOWER END OF THE STEM CLOUDS COULD DEVELOP AS NATURAL CONVECTIVE CLOUDS INTO SHOWE R CLOUDS, BUTH THS DEVELOPMENT DEPENDS GREATLY ON THE PROPERTIES OF TH E ATMOSPHERE AT THE TIME OF EXPLOSION.


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