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Solar Cycle Related Variation in Solar Differential Rotation and Meridional Flow in Cycle 24
Shinsuke Imada
Corresponding Author
ORCiD: https://orcid.org/0000-0001-7891-3916
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This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
We studied temporal variation of the differential rotation and poleward meridional circulation during solar cycle 24 using the magnetic element feature tracking technique. We used line-of-sight magnetograms obtained using the Helioseismic and Magnetic Imager aboard the Solar Dynamics Observatory from May 01, 2010 to March 26, 2020 (for almost the entire period of solar cycle 24, Carrington Rotation from 2096 to 2229) and tracked the magnetic element features every 1 hour. We also estimated the differential rotation and poleward meridional flow velocity profiles. The observed profiles are consistent with those of previous studies on different cycles. Typical properties resulting from torsional oscillations can also be observed from solar cycle 24. The amplitude of the variation was approximately $\pm$10 m s$^{-1}$. Interestingly, we found that the average meridional flow observed in solar cycle 24 is faster than that observed in solar cycle 23. In particular, during the declining phase of the cycle, the meridional flow of the middle latitude is accelerated from 10 to 17 m s$^{-1}$, which is almost half of the meridional flow itself. The faster meridional flow in solar cycle 24 might be the result of the weakest cycle during the last 100 years.
Keywords
solar surface flow, solar cycle
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CURRENT STATUS: Published
Published
On 26 Nov, 2020
No community comments so far
Editorial decision: Accept
On 01 Nov, 2020
Editor assigned
On 28 Oct, 2020
Submission checks complete
On 28 Oct, 2020
Editor invited
On 28 Oct, 2020
No comments provided
Review #1 received
Received 26 Oct, 2020
Editorial decision: Minor Revision
On 26 Oct, 2020
Reviewers invited
Invitations sent on 25 Oct, 2020
Reviewer #1 agreed
On 25 Oct, 2020
Editor assigned
On 30 Sep, 2020
Submission checks complete
On 29 Sep, 2020
Editor invited
On 29 Sep, 2020
Version 1
Posted 20 May, 2020
No comments provided
Editorial decision: Minor Revision
On 17 Sep, 2020
Review #1 received
Received 17 Jul, 2020
Reviewers invited
Invitations sent on 26 Jun, 2020
Reviewer #1 agreed
On 26 Jun, 2020
Editor assigned
On 27 May, 2020
Editor invited
On 26 May, 2020
Submission checks complete
On 15 May, 2020
First submitted
On 12 May, 2020
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Subject Areas
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This preprint is under consideration at Earth, Planets and Space. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Full paper
Solar Cycle Related Variation in Solar Differential Rotation and Meridional Flow in Cycle 24
Shinsuke Imada
Corresponding Author
ORCiD: https://orcid.org/0000-0001-7891-3916
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Published
On 26 Nov, 2020
No community comments so far
Editorial decision: Accept
On 01 Nov, 2020
Editor assigned
On 28 Oct, 2020
Submission checks complete
On 28 Oct, 2020
Editor invited
On 28 Oct, 2020
No comments provided
Review #1 received
Received 26 Oct, 2020
Editorial decision: Minor Revision
On 26 Oct, 2020
Reviewers invited
Invitations sent on 25 Oct, 2020
Reviewer #1 agreed
On 25 Oct, 2020
Editor assigned
On 30 Sep, 2020
Submission checks complete
On 29 Sep, 2020
Editor invited
On 29 Sep, 2020
Version 1
Posted 20 May, 2020
No comments provided
Editorial decision: Minor Revision
On 17 Sep, 2020
Review #1 received
Received 17 Jul, 2020
Reviewers invited
Invitations sent on 26 Jun, 2020
Reviewer #1 agreed
On 26 Jun, 2020
Editor assigned
On 27 May, 2020
Editor invited
On 26 May, 2020
Submission checks complete
On 15 May, 2020
First submitted
On 12 May, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Astronomy
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
We studied temporal variation of the differential rotation and poleward meridional circulation during solar cycle 24 using the magnetic element feature tracking technique. We used line-of-sight magnetograms obtained using the Helioseismic and Magnetic Imager aboard the Solar Dynamics Observatory from May 01, 2010 to March 26, 2020 (for almost the entire period of solar cycle 24, Carrington Rotation from 2096 to 2229) and tracked the magnetic element features every 1 hour. We also estimated the differential rotation and poleward meridional flow velocity profiles. The observed profiles are consistent with those of previous studies on different cycles. Typical properties resulting from torsional oscillations can also be observed from solar cycle 24. The amplitude of the variation was approximately $\pm$10 m s$^{-1}$. Interestingly, we found that the average meridional flow observed in solar cycle 24 is faster than that observed in solar cycle 23. In particular, during the declining phase of the cycle, the meridional flow of the middle latitude is accelerated from 10 to 17 m s$^{-1}$, which is almost half of the meridional flow itself. The faster meridional flow in solar cycle 24 might be the result of the weakest cycle during the last 100 years.
Figure 1
Figure 2
Figure 3
Figure 4
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the manuscript can be downloaded and accessed as a PDF.