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

• 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

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.