Solar mean magnetic field variability: A wavelet approach to Wilcox Solar Observatory and SOHO/Michelson Doppler Imager observations
(2002) In Journal of Geophysical Research 107(A10: 1318).- Abstract
- Solar mean magnetic field (SMMF) measurements from the Wilcox Solar Observatory and with the SOHO/MDI instrument are described and analyzed. Even though two completely different methods of observation are used, the two data sets obtained show a strong similarity. Using continuous wavelet transforms, SMMF variability is found at a number of temporal scales. Detected SMMF signals with a 1–2 year period are considered to be linked to variations in the internal rotation of the Sun. Intermediate SMMF oscillations with a period of 80–200 days are probably connected to the evolution of large active regions. We also find evidence for 90 min variations with coronal mass ejections as a suggested origin.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/119921
- author
- Boberg, Fredrik LU ; Lundstedt, Henrik ; Hoeksema, J T ; Scherrer, P H and Liu, W
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- coronal mass ejections, Solar magnetic field, active regions, wavelet analysis, internal rotation
- in
- Journal of Geophysical Research
- volume
- 107
- issue
- A10: 1318
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000180353900053
- scopus:41749119669
- ISSN
- 2156-2202
- DOI
- 10.1029/2001JA009195
- language
- English
- LU publication?
- yes
- id
- 548416a0-3232-4908-9ceb-9522e9dd9b31 (old id 119921)
- date added to LUP
- 2016-04-01 12:28:08
- date last changed
- 2024-01-08 21:32:48
@article{548416a0-3232-4908-9ceb-9522e9dd9b31, abstract = {{Solar mean magnetic field (SMMF) measurements from the Wilcox Solar Observatory and with the SOHO/MDI instrument are described and analyzed. Even though two completely different methods of observation are used, the two data sets obtained show a strong similarity. Using continuous wavelet transforms, SMMF variability is found at a number of temporal scales. Detected SMMF signals with a 1–2 year period are considered to be linked to variations in the internal rotation of the Sun. Intermediate SMMF oscillations with a period of 80–200 days are probably connected to the evolution of large active regions. We also find evidence for 90 min variations with coronal mass ejections as a suggested origin.}}, author = {{Boberg, Fredrik and Lundstedt, Henrik and Hoeksema, J T and Scherrer, P H and Liu, W}}, issn = {{2156-2202}}, keywords = {{coronal mass ejections; Solar magnetic field; active regions; wavelet analysis; internal rotation}}, language = {{eng}}, number = {{A10: 1318}}, publisher = {{Wiley-Blackwell}}, series = {{Journal of Geophysical Research}}, title = {{Solar mean magnetic field variability: A wavelet approach to Wilcox Solar Observatory and SOHO/Michelson Doppler Imager observations}}, url = {{https://lup.lub.lu.se/search/files/2936020/623930.pdf}}, doi = {{10.1029/2001JA009195}}, volume = {{107}}, year = {{2002}}, }