Wednesday

Macrospicules are localized small-scale jet-like phenomena in the solar atmosphere transporting a considerable amount of momentum and energy from the photosphere to the overlaying chromosphere, transition region and the low corona (and possible even further). A detailed statistical analysis of the temporal behavior and spatial properties of macospicules indicated a link to the solar global dynamo. Using observations yielded by the Atmospheric Imaging Assembly of Solar Dynamics Observatory, we constructed a database covering a 6.5-year-long period, containing around 350 macrospicules that occurred between 2010 June and 2016 December. In this talk, the long-term variation of the physical properties of macrospicules in coronal holes and Quiet Sun areas both in the northern and southern hemisphere of the Sun are discussed. Cross-correlation of the properties of macrospicules shows a relatively strong correlation, but not always a dominant one. However, a more detailed analysis indicates a wavelike signature in the global, long-term behavior of macrospicule properties in time. The periods of these long-term oscillatory behaviors are just under two years. Also, in terms of solar north/south hemispheres, a strong asymmetry was found in the spatial distribution of MS properties, which may be accounted for by the solar dynamo.