Biographical Memoirs Volume 74 (1998) / Chapter Skim
Currently Skimming:
Scott Ellsworth Forbush
Scott Ellsworth Forbush
Pages 92-109
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From page 93... ...
Among the latter were magnetic storms, solar activity, rotation of the Earth, en c! rotation of the Sun.
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From page 94... ...
This characteristic of his work is well illustrates! by his classical review article "Time-Variations of Cosmic Rays" in the Handbuch der Physik ~ ~ 966)
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From page 95... ...
Two years later he joiner! the staff of the famous nonmagnetic sailing ship Carnegie, a vessel built specifically for DTM's worIc~wicle survey of the geomagnetic fielcI.
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From page 96... ...
of the primary cosmic radiation after its traversal of the Earth's external magnetic field and its interaction with the overlying atmosphere. Forbush macle a cletailec!
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From page 97... ...
This was a challenging task in the face of statistical fluctuations and variability due to multiple and perhaps unrelated physical causes. Following in the footsteps of the German geophysicist Julius Bartels, he became a master of this process, often clepencling on Bartels' concept of the harmonic clial in searching for perioclicities en c!
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From page 98... ...
causer! magnetic storms whose main phase was plausibly attributable to a westward-flowing equatorial ring current (Stormer ring current)
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From page 99... ...
Over two clecacles elapses! before the physical causes of Forbush decreases were convincingly iclentifiecI.
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During this periocI, he clirectec! a mathematical analysis division of an operations research office baser!
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From page 101... ...
from the abstract of that paper: Annual means from continuous registration of cosmic-ray ionization at four stations from 1937 to 1952 show a variation of nearly four per cent, which is similar at all stations and which is negatively correlated with sunspot numbers. This variation in cosmic-ray intensity is quite similar for the annual means of all days, international magnetic quiet days, and international magnetic disturbed days, which indicates that it is not due to transient decreases accompanying some magnetic storms....
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From page 102... ...
his earlier seminal work on the relationships among solar activity, geomagnetic storms, en c! cosmic-ray intensity.
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From page 103... ...
As of 1997, scores of Forbush decreases have been observec! by instruments on spacecraft near the Earth en c!
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From page 104... ...
solar ciata. GENERAL COMMENTS Scott Forbush was profoundly influenced by Julius Bartels, who was a research associate at the Department of Terrestrial Magnetism of the Carnegie Institution from 1936 to 1940, and by Sydney Chapman, who occasionally visited there.
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From page 105... ...
papers on statistical methods for analyzing geophysical data en c! he extenclec!
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From page 106... ...
the especially appropriate John Adam Fleming Awarc! of the American Geophysical Union "in recognition of outstanding contribution to the description and understanding of electricity en c!
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From page 107... ...
SCOTT ELLSWORTH FORBUSH 107 founclec!
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From page 108... ...
Intensity variations in outer Van Allen radiation belt.
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From page 109... ...
The variation with a period of two solar cycles in the cosmic ray diurnal anisotropy for the nucleonic component.
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