Confirmation of solar cycle-dependent intermediate-degree p-mode frequency shifts

Results of intercomparisons of seven different sets of frequencies of intermediate-degree p-modes obtained at several different locations between 1981 and 1989 are presented. It is shown that the frequency shifts exhibited by all of these intermediate-degree p-modes are consistent with the intermedi...

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Bibliographic Details
Main Authors: Rhodes, Edward J., Jr., Cacciani, Alessandro, Korzennik, Sylvain G., Ulrich, Roger K.
Format: Other/Unknown Material
Language:unknown
Published: 1993
Subjects:
92
Mount Wilson
South Pole
Woodward
South pole
Online Access:http://ntrs.nasa.gov/search.jsp?R=19930049529
Description
Summary:Results of intercomparisons of seven different sets of frequencies of intermediate-degree p-modes obtained at several different locations between 1981 and 1989 are presented. It is shown that the frequency shifts exhibited by all of these intermediate-degree p-modes are consistent with the intermediate-degree frequency shifts presented by Libbrecht and Woodward (1990) and also with the low-degree frequency shifts presented by Elsworth et al. (1990). It is also shown that these frequency shifts correlate with solar cycle-dependent changes in sunspot number, area, and irradiance. Unbinned and binned differences between 1984 Mount Wilson Observatory and revised 1981 South Pole frequencies are illustrated.

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