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  Subjects -> METEOROLOGY (Total: 106 journals)
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Journal of Weather Modification
Number of Followers: 2  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0739-1781
Published by Weather Modification Association Homepage  [1 journal]
  • Editor Message - 2019

    • Free pre-print version: Loading...

      Authors: David J. Delene
      PubDate: Wed, 07 Feb 2024 00:00:00 +000
       
  • Editor's Message - 2022

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      Authors: Tom DeFelice
      PubDate: Wed, 02 Aug 2023 00:00:00 +000
       
  • The Kenya hail suppression program

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      Authors: Thomas Henderson
      Abstract: Beginning in October 1967, an operational hail suppression program was initiated in an area located some 130 miles northwest of Nairobi, Kenya, East Africa. The project was supported by private companies which have approximately 45,000 acres of select tea in production. Within the operational area, average precipitation is about 71 inches and hail on the ground is experienced on more than 200 days per year. During the period October 1967 through January 1975, silver iodide was applied by aircraft at cloud base in the inflow area identified to be relevant to that volume of cloud which gives birth to, and allows growth of, hailstones. Program design included a rate of silver iodide application sufficient to produce ice nuclei concentrations of 100 - 1,000 per liter effective at -15C within this important hail producing volume of cloud. A total of 1582 operational days and 2,910 seeding flight hours have been logged. More than 5,700 individual cumulus cells have been seeded. In comparisons of hail damage from seeded and non- seeded cumulus developments, the average damage to tea has apparently been reduced by approximately 40%.
       
  • Background and summary information on the Kings River weather modification
           program conducted during the 19-year period from 1954 through 1973

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      Authors: Thomas Henderson
      Abstract: The Kings River is one of several streams which originates in the high snowfields along the western slope of the Sierra Range in California and flows from its 1600 square mile watershed to the rich San Joaquin Valley. Emerging from the foothills east of Fresno, the total annual flow has ranged from a minimum of less than 400,000 acre feet to a maximum of more than 4,300,000 acre feet. The average for the past 40 years has been approximatel1y, 600,000 acre feet......
       
  • Background and summary information on the Kings River weather modification
           program conducted during the 19-year period from 1954 through 1973

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      Authors: Thomas Henderson
      Abstract: The Kings River is one of several streams which originates in the high snowfields along the western slope of the Sierra Range in California and flows from its 1600 square mile watershed to the rich San Joaquin Valley. Emerging from the foothills east of Fresno, the total annual flow has ranged from a minimum of less than 400,000 acre feet to a maximum of more than 4,300,000 acre feet. The average for the past 40 years has been approximatel1y, 600,000 acre feet......
       
  • Survey of industry practices in weather modification: preliminary report
           of WMA committee on industry practices

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      Authors: Keith Brown; Arnett Dennis, Ronald Lininger
      Abstract: Some time ago the Weather Modification Association made a commitment to attempt to determine "industry practice" in the weather modification field. There were a number of reasons for undertaking this study, but one of the major reasons was the federal rule on weather modification reporting. This rule states that if a weather modification activity report indicates a significant departure from practices generally employed in similar circumstances then state officials will be notified. Since these industry practices have never been specified, it is important that the full range of practices be determined......
       
  • Present and future of weather modification: regional issues

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      Authors: Stanley Changnon Jr.
      Abstract: This paper 1) reviews potential weather modification technologies, 2) speculates about the applicability of these technologies in regions of the United States, and 3) estimates the efforts needed and required to get technologies operationat lhroughout the States.....
       
  • Weather modification and public opinion in South Dakota, preliminary
           findings

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      Authors: Barbara Farhar
      Abstract: The South Dakota Weather Modification Program (SDWMP) has become institutionalized in the State of South Dakota. The Program, begun in 1972, has since expanded to include about 60% of the land area of the state at a cost of approximately $1 million a year. The SDWMP has become a standard item in the Governor’s budget for presentation to the South Dakota legislature each year.....
       
  • Proof of legal causation in weather modification litigation: Reinbold v.
           Sumner Farmers, Inc., and Irving P. Krick, Inc.

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      Authors: Ray Davis; Pierre St.-Amand
      Abstract: In 1974 there was a "bumper crop" of weather modification litigation. There were only a dozen or so cloud seeding lawsuits tried during the preceeding twenty-five years of artificial weather alteration. Two cases were filled and disposed of in 1974; one case was filed, but has not yet come to a hearing; and another case which had been initiated in 1972 was tried last year. Perhaps no statistical significance can be drawn from moving from an average of one case every two years to four cases in a single year, but happily-employed lawyers and expert witnesses undoubtedly found comfort in the increased volume of litigation. Fortunately for weather modifiers and their insurers, the 1974 crop of cases yielded no defeats....
       
  • Study of dropsize distribution in warm clouds subjected to repeated
           seeding

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      Authors: R. Kapoor; S. Paul, A. Murty, K. Krishna, Bh. Murty
      Abstract: Warm seeding experiments, using aircraft, were conducted in three different regions in India during the summer monsoon of 1973. Cloud drop samples were obtained, during these experiments, in a few cases of isolated cumulus/cumulus complexes while they had been repeatedly seeded. For this purpose, glass slides coated with magnesium-oxide smoke were exposed by hand operated gadgets through the window of the seeder aircraft. Analysis of the data collected pointed out marked changes in the microstructure of the clouds following seeding. The drop size distribution broadened. The median volume diameter increased. The drop concentration decreased. The liquid water content increased. It was argued that the features noticed as above could be due to the combined effect of the accelerated condensation and coalescence processes following seeding.
       
  • Study of dropsize distribution in warm clouds subjected to repeated
           seeding

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      Authors: R. Kapoor; S. Paul, A. Murty, K. Krishna, Bh. Murty
      Abstract: Warm seeding experiments, using aircraft, were conducted in three different regions in India during the summer monsoon of 1973. Cloud drop samples were obtained, during these experiments, in a few cases of isolated cumulus/cumulus complexes while they had been repeatedly seeded. For this purpose, glass slides coated with magnesium-oxide smoke were exposed by hand operated gadgets through the window of the seeder aircraft. Analysis of the data collected pointed out marked changes in the microstructure of the clouds following seeding. The drop size distribution broadened. The median volume diameter increased. The drop concentration decreased. The liquid water content increased. It was argued that the features noticed as above could be due to the combined effect of the accelerated condensation and coalescence processes following seeding.
       
  • Hail suppression in Alberta 1956-1968

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      Authors: Irving Krick; Newton Stone
      Abstract: A brief review of the evolution of weather modification has been traced with main emphasis on hail suppression and rain increase as progressed by our group. Hail suppression techniques employed in Alberta have been discussed and the present status of our own capabilities for carrying out commercial operations are reviewed. Specific benefit to cost ratios for hail suppression and rain increase are included.
       
  • Evaluation of an operational hail suppression project in Texas

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      Authors: Stanley Changnon Jr.
      Abstract: An investigation was performed to evaluate statistically the results of the first four years of an ongoing hail suppression project in Texas so as to gain information relative to a decision on a future hail suppression effort in Illinois. Continuous hail suppression operations over a 4-year period and in a fixed area offer a good opportunity to assess the effects of cloud base seeding as reflected in surface hail data. Two sets of hail data with long-term historical records in and around the 2-county area in Texas with hail suppression projects in the 1970-73 period were investigated.
       
 
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  Subjects -> METEOROLOGY (Total: 106 journals)
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