Open AccessFurther study of fOF2 and M(3000)F2 in different solar cycles
Author(s) -
P.A. Bradley
Publication year - 1994
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-4227
Subject(s) - sunspot number , term (time) , solar cycle , atmospheric sciences , sunspot , meteorology , environmental science , solar maximum , mathematics , physics , astronomy , quantum mechanics , magnetic field , solar wind
Measured monthly median fOF2 and M(3000)F2 for Slough over six solar cycles from 1932 onwards are examined for a selection of hours and months. Data are shown as a function of twelve-monthly smoothed sunspot number. Comparisons are made for the different solar cycles and for the rising and falling halves of each cycle. Measurements for individual cycles are compared with best-fit parabolic regression lines over all cycles to investigate possible systematic long-term effects