Research Highlights

A.G. de Wijn, P.G. Judge, R. Ezzeddine, A. Sainz Dalda recently argued that a region of the solar spectrum in the near-UV between about 250 and 290 nm is optimal for studying magnetism in the solar chromosphere due to an abundance of Mg II, Fe II, and Fe I lines that sample various heights in the solar atmosphere.

Han-Li Liu, Matthias Rempel, Gokhan Danabasoglu, Stanley C. Solomon, and Joseph M. McInerney tackle the problem of clearly identifying solar signal from the very large climate variability on broad time scales. Providing a lower bound of the solar minimum condition according to current understanding of solar physics and specifying the extremely low solar minimum condition in a climate model that considers the effects of ocean and middle atmosphere, they identify significant climate responses.

Bernadett Belucz, Mausumi Dikpati, Scott W. McIntosh, Robert J. Leamon, and Robertus Erdelyi discuss the Extended Solar Cycle (ESC) activity and strong overlapping between cycles. They compute the unstable eigenmodes for MHD Rossby waves at the base of the convection zone and study how the properties of these energetically active Rossby waves change as these band-pairs migrate equatorward.

Mausumi Dikpati, et. al. present findings of a unique evolution of identified shorter periodicities in global solar activity variation, like the Rieger-type, arising from magnetic Rossby waves, throughout the Solar Cycles 19-25. They report is further observational evidence of the strong relationship between the Rieger-type periodicity, magneto-Rossby waves, and major solar flare activity.

Dr. Astrid Maute talked to a large number of heliophysicists while attending the CEDAR 2022 workshop. In this paper she describes a concerning number of heliophysicists that shared terrifying stories and experiences of bullying, harassment, burnout, etc., from across career levels, institution types, and job titles. While writing these position papers, the number of people who privately shared terrifying stories and experiences of bullying and harassment was insane.

S. Danilovic, J. P. Bjørgen, J. Leenaarts, and M. Rempel discuss the important role of Rapid blue- and red-shifted events (RBEs/RREs) in mass-loading and heating the solar corona, but their nature and origin are still debatable. They model these features to learn more about their properties, formation and origin.

B. C. Low reviews the two-plate initial boundary-value problem of Parker, treating the relaxation of a 3D magnetic field prescribed with an arbitrary topology to a terminal force-free field in a cold, viscous, electrically perfect fluid-conductor. Anchored by their foot-points at the perfectly conducting rigid plates, the relaxing field preserves its topology.

K. H. Pham, W. Wang, H. Liu, D. Lin, M. Wiltberger, et al. discuss how during geomagnetic storms, increased activity within the geospace environment causes large scale plasma convection to occur and electrons to precipitate into the upper atmosphere. The enhanced heating of the thermosphere by the plasma convection and electron precipitation can produce large perturbations in the neutral density. 

Wenbin Wang, Liying Qian, et. al. investigate the crests variations and associated ionosphere-thermosphere disturbances following the 2022 Tonga Volcano eruption, dramatic suppression and deformation of the equatorial ionization anomaly (EIA) crests occurred in the American sector ∼14,000 km away from the epicenter.