The Quasi-biennial-oscillation-type Signals in the Subsurface Flow Fields during Solar Cycles 23 and 24

We studied the presence and spatiotemporal evolution of quasi-biennial oscillations (QBOs) in the rotation-rate residuals at target depths of 0.90 R ⊙ , 0.95 R ⊙ , and 0.99 R ⊙ and at low- (0°–30°), mid- (30°–50°), and high-latitudinal (50°–70°) bands. To achieve these objectives we used data from t...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2021-10, Vol.920 (1), p.49
Main Authors: Inceoglu, Fadil, Howe, Rachel, Loto’aniu, Paul T. M.
Format: Article
Language:English
Subjects:
Amplitudes
Astrophysics
Evolution
Observatories
Quasi-biennial oscillation
Rotation
SOHO Mission
Solar activity
Solar cycle
Solar observatories
Solar oscillations
Solar rotation
Storm seepage
Subsurface flow
Time
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We studied the presence and spatiotemporal evolution of quasi-biennial oscillations (QBOs) in the rotation-rate residuals at target depths of 0.90 R ⊙ , 0.95 R ⊙ , and 0.99 R ⊙ and at low- (0°–30°), mid- (30°–50°), and high-latitudinal (50°–70°) bands. To achieve these objectives we used data from the Michelson Doppler Imager on the Solar and Heliospheric Observatory and the Helioseismic and Magnetic Imager on the Solar Dynamics Observatory, covering solar cycles 23 and 24, respectively. The results show that there are QBO-like signals in each latitudinal band and depth; however, they are affected by higher-amplitude and longer-timescale variations. The QBO-like signals found in each target depth and latitudinal bands show different spatiotemporal evolution. The amplitudes of variations of the rotation-rate residuals in the QBO timescale increase with increasing depth.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac16de