TY - JOUR
T1 - Reply to comment on the paper “ on a role of quadruple component of magnetic field in defining solar activity in grand cycles” by Usoskin (2017)
AU - Zharkova, Valentina
AU - Shepherd, Simon
AU - Popova, Elena
AU - Zharkov, Sergei
PY - 2018/9
Y1 - 2018/9
N2 - In this communication we provide our answers to the comments by Usoskin (2017) on our recent paper (Popova et al, 2017a). We show that Principal Component Analysis (PCA) allows us to derive eigen vectors with eigen values assigned to variance of solar magnetic field waves from full disk solar magnetograms obtained in cycles 21–23 which came in pairs. The current paper (Popova et al, 2017a) adds the second pair of magnetic waves generated by quadruple magnetic sources. This allows us to recover a centennial cycle, in addition to the grand cycle, and to produce a closer fit to the solar and terrestrial activity features in the past millennium.
AB - In this communication we provide our answers to the comments by Usoskin (2017) on our recent paper (Popova et al, 2017a). We show that Principal Component Analysis (PCA) allows us to derive eigen vectors with eigen values assigned to variance of solar magnetic field waves from full disk solar magnetograms obtained in cycles 21–23 which came in pairs. The current paper (Popova et al, 2017a) adds the second pair of magnetic waves generated by quadruple magnetic sources. This allows us to recover a centennial cycle, in addition to the grand cycle, and to produce a closer fit to the solar and terrestrial activity features in the past millennium.
KW - solar activity
KW - principal components
KW - dynamo waves
KW - Gleissberg cycle
UR - https://www.scopus.com/pages/publications/85030658704
U2 - 10.1016/j.jastp.2017.09.019
DO - 10.1016/j.jastp.2017.09.019
M3 - Article
SN - 1364-6826
VL - 176
SP - 72
EP - 82
JO - Journal of Atmospheric and Solar-Terrestrial Physics
JF - Journal of Atmospheric and Solar-Terrestrial Physics
ER -