Geospace effects of high-speed solar wind streams

Thu, 2014-11-06 12:28 -- Joanna Harries

A Proceedings A Special Feature organised by Steven K. Morley

Geospace can be defined as the region of near-Earth space dominated by the Earth's, rather than the Sun's, magnetic field. The terrestrial magnetosphere forms a cavity in the interplanetary medium that partially shields our planet from cosmic rays, solar energetic protons and numerous other phenomena potentially harmful to terrestrial life and technological systems. The solar wind, in which the magnetosphere is immersed, is structured on many scales and is generally hard to predict; high-speed solar wind streams (HSS), which have their origins in the outflow from coronal holes, form a large-scale repeatable driver for Earth's magnetosphere and the parts of geospace coupled to it. It is the role of this repeatable driver, and the responses in the various regions of geospace, that is the focus of this special feature.

The articles in this Proceedings A special feature present a snapshot of current research into the effects of stream interaction regions, and their attendant HSS, on geospace. While both space weather and its effects remain difficult to predict, progress in understanding the effects of this most repeatable of solar wind phenomena enhances both our basic understanding of the Sun-Earth system and our ability to predict the geospace response to solar variability.

The issue comprises the following papers:

by Steven K. Morley

An investigation of the magnetosphere-ionosphere response to real and idealized co-rotating interaction region events through global magnetohydrodynamic simulations
by R. Ilie, M. W. Liemohn, J. Kozyra and J. Borovsky

CIR versus CME drivers of the ring current during intense magnetic storms
by Michael W. Liemohn, Matt Jazowski, Janet U. Kozyra, Natalia Ganushkina, Michelle F. Thomsen and Joseph E. Borovsky

Dropouts of the outer electron radiation belt in response to solar wind stream interfaces: global positioning system observations
by Steven K. Morley, Reiner H. W. Friedel, Emma L. Spanswick, Geoffrey D. Reeves, John T. Steinberg, Josef Koller, Thomas Cayton and Evan Noveroske

High-speed stream driven inferences of global wave distributions at geosynchronous orbit: relevance to radiation-belt dynamics
by Elizabeth A. MacDonald, Lauren W. Blum, S. Peter Gary, Michelle F. Thomsen and Michael H. Denton

Generation of magnetic and particle Pc5 pulsations during the recovery phase of strong magnetic storms
by V. Pilipenko, O. Kozyreva, V. Belakhovsky, M. J. Engebretson and S. Samsonov

High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes
by D. Pokhotelov, P. T. Jayachandran, C. N. Mitchell and M. H. Denton

Short-term periodic features observed in the infrared cooling of the thermosphere and in solar and geomagnetic indexes from 2002 to 2009
by Martin G. Mlynczak, Linda A. Hunt, Janet U. Kozyra and James M. Russell III