Variations of Solar Wind Parameters Over a Solar Cycle: Implications for STEREO Observations

Details Variations of Solar Wind Parameters Over a Solar Cycle: Implications for STEREO Observations Variations of Solar Wind Parameters Over a Solar Cycle: Implications for STEREO Observations

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh21a0321w&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH21A-0321

Physics

2162 Solar Cycle Variations (7536)

Scientific paper

Solar wind parameters such as speed, density, direction and thermal speed (or kinetic temperature) can vary greatly over a complete solar cycle. To study an entire solar cycle, we analyzed data from the Proton Monitor on the SOHO spacecraft; the SWE (Vector Electron Ion Spectrometer) on the Wind spacecraft, and the SWEPAM instrument on the ACE spacecraft. With this combined data set we looked for trends and patterns, as well as extremes in these solar wind parameters. In addition to data analysis from these instruments over the solar cycle, we use remote image data from SOHO to characterize what the sun actually looks like during each stage of the solar cycle. We attempt to correlate sun surface conditions with passing solar wind conditions. By studying the many states of the solar wind parameters over an entire solar cycle, we are able to discuss possible conditions that can be expected in the early phases of the upcoming Solar Terrestrial Relations Observatory (STEREO) mission, in particular for the Plasma and Suprathermal Ion Composition Investigation. STEREO is due to launch this fall into solar minimum conditions. Consequently, special attention is paid to the SOHO/WIND observations of interplanetary coronal mass ejections during the solar minimum of 1996-1997.

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