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- W4311993713 abstract "The Ca-K spectroheliograms obtained at the Kodaikanal observatory (KO) are used to generate a uniform time series using the equal contrast technique (ECT) to study the long and short-term variation in the solar chromosphere. The percentage of plage, Enhanced network (EN), Active network (AN), and Quiet network (QN) area at various latitudes is compared with the activity at 35$^{circ}$ latitude and also with the sunspot number for the period of 1907 -- 1984. The values of phase differences indicate that the activity begins at $sim$45$^{circ}$ latitude and shift progressively to the lower latitude at a speed of $sim$~9.4~m~sec$^{-1}$ . The shift speed slows down gradually and reaches $sim$~3~m~sec$^{-1}$ at $sim$5$^{circ}$ latitude. No phase difference between the variations of Ca-K activity at 55$^{circ}$, 65$^{circ}$, and 75$^{circ}$ latitude belts implies that changes in the activity are happening simultaneously. The analysis shows that the activity at polar latitude belts is anti-correlated with the sunspot number. This study indicates that a multi-cell meridional flow pattern could exist in the solar convection zone. One type of cell could transport the magnetic elements from mid-latitude to low-latitude belts through meridional flows, and the other one could be operating in the polar region." @default.
- W4311993713 created "2023-01-03" @default.
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- W4311993713 date "2022-12-16" @default.
- W4311993713 modified "2023-09-30" @default.
- W4311993713 title "Temporal and latitudinal variations of Ca-K plage and network area: An implication to meridional flows" @default.
- W4311993713 doi "https://doi.org/10.48550/arxiv.2212.08382" @default.
- W4311993713 hasPublicationYear "2022" @default.
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