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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 845-845 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE reported1 influence of the solar and interplanetary magnetic sector structure on terrestrial atmospheric vorticity at the 500-mbar level during the winters of 1963-73 has been disputed by Williams and Gerety2. We consider, however, that the response has been remarkably constant if an apparent ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 277 (1979), S. 635-637 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At Stanford the relative velocity between a central circular area of radius 0.5/? on the solar disk and most of the remaining area of the solar disk is measured. An optical scheme similar to that described in refs i and 2 is used and is described in detail by Dittmer3. Fig. 1 Superposed epoch ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 353-354 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Top: mean value of the solar magnetic field1 (dots) and polarity of the interplanetary magnetic field (bars). The interplanetary field is displaced by five days to allow for the transit time of solar wind plasma from the Sun to the Earth. Bottom: contribution of sunspot magnetic fields1 to ...
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  • 4
    Publication Date: 2013-08-31
    Description: This brief history is organized around the long problem of the solar M region, i.e. the structure on the sun that is responsible for recurrent geomagnetic disturbances.
    Keywords: SOLAR PHYSICS
    Type: SU-IPR-665 , NASA-CR-148565
    Format: application/pdf
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  • 5
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    In:  CASI
    Publication Date: 2013-08-31
    Description: The advantages of a regular program of daily observations of the magnetosphere, ionosphere and atmosphere are described. Such synoptic observations may be one of the best routes to understanding the physical mechanisms involved in sun-weather influences. Some specific examples of such observations are given.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: SU-IPR-663 , NASA-CR-148568
    Format: application/pdf
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  • 6
    Publication Date: 2013-08-31
    Description: A description is given of the relationship observed between enhancements in the far ultraviolet solar irradiance and the position of the solar magnetic sector boundaries. The ultraviolet observations were made with the monitor of ultraviolet solar energy (MUSE) experiments which were launched aboard Nimbus 3 in April 1969 and Nimbus 4 April 1970. A comparison between the positions of solar magnetic sector boundaries and ultraviolet enchancements of the sun seems to show, at least during the year of 1969, that the ultraviolet maxima tend to occur near the times when a solar sector boundary is near the central meridian. An estimate of the magnitude of the variable ultraviolet solar energy input into the atmosphere resulting from the rotation of active solar longitudes is that for wavelengths less that 175 nm and down to H Lyman alpha it exceeds the annual variation whereas at longer wavelengths it is less. The total observed peak to peak variation in the ultraviolet irradiance from 120 to 300 nm over a solar rotation is typically at least 230 ergs/sq cm sec.
    Keywords: SPACE RADIATION
    Type: NASA-TM-X-70674 , X-912-74-135
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  • 7
    Publication Date: 2013-08-31
    Description: The persistent large-scale coronal magnetic structure associated with a sector boundary appears to consist of a magnetic arcade loop structure extending from one solar polar region to the other in approximately the North-South direction. This structure was inferred from computer coronal magnetic field maps for days on which a stable magnetic sector boundary was near central meridian, based on an interplanetary sector boundary observed to recur during much of 1968 and 1969.
    Keywords: SPACE RADIATION
    Type: SU-IPR-574 , NASA-CR-136315
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  • 8
    Publication Date: 2013-08-31
    Description: An observed influence is studied of the interplanetary magnetic sector structure on the geomagnetic variations in the polar cap which appears to be due to the component of the interplanetary magnetic field near the ecliptic perpendicular to the earth-sun direction. It is suggested that the observed effect on the ground originates in the front of the magnetosphere.
    Keywords: GEOPHYSICS
    Type: NASA-CR-129165 , DMI-GEOPHYS-PAPERS-R-30
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  • 9
    Publication Date: 2013-08-31
    Description: The solar oscillation with period near 160 minutes is found to be unique in a spectrum computed over the range of periods from about 71 to 278 minutes. A best estimate of the period is 160.0095 + or - 0.001 minutes, which is different from 160 minutes (one ninth of a day) by a highly significant amount. The width of the peak is approximately equal to the limiting resolution that can be obtained from an observation lasting 6 years, which suggests that the damping time of the oscillations is considerably longer than 6 years. A suggestion that this peak might be the result of a beating phenomenon between the five minute data averages and a solar oscillation with period near five minutes is shown to be incorrect by recomputing a portion of the spectrum using 15 second data averages.
    Keywords: SOLAR PHYSICS
    Type: SU-IPR-865 , NAS 1.26:168911 , NASA-CR-168911
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  • 10
    Publication Date: 2013-08-31
    Description: The warped heliospheric current sheet in early 1976 was calculated from the observed photospheric magnetic field using a potential field method. Comparisons with measurements of the interplanetary magnetic field polarity in early 1976 obtained at several locations in the heliosphere at Helios 1, Helios 2, Pioneer 11 and Earth show a rather detailed agreement between the computed current sheet and the observations. It appears that the large scale structure of the warped heliospheric current sheet is determined by the structure of the photospheric magnetic field, and that "ballerina skirt" effects may add small scale ripples.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-164827 , SU-SUIPR-803
    Format: application/pdf
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