The Solar Wind.pdf

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• The heliospheric current sheet shows markedvariation during the solar cycle.– The “waviness” of the current sheet increases at solarmaximum.– The current sheet is rather flat during solar minimum butextends to high latitudes during solar maximum.– During solar minimum CIRs are confined to the equatorialregion but cover a wide range of latitudes during solarmaximum.– The average velocity of the solar wind is greater during solarminimum because high-speed streams are observed morefrequently and for longer times
• A coronal mass ejection in space– A time sequence of differencesbetween four images taken with theSolar Maximum Missioncoronagraph during a coronal massejection on 14 April 1980 and asingle "pre-event" image.– Positive differences (brightenings ofthe corona since the pre-eventimage) are shown in red andorange, negative differences inblue.– A pair of bright (red) loops movedoutward through the coronabetween 0544 and 0709 UT,leaving a wedge of depleted (blue)corona behind them (as at 0847UT).– Coronal features to the sides of theloops were progressively pushedaway from the ejection during itspassage through the coronagraphfield of view, and are thus visible onthese difference images
Page 1 and 2: ESS 200CLectures 6 and 7The Solar W
Page 3 and 4: • Solar wind speeds (heavy lines)
Page 5 and 6: • It is useful to describe the so
Page 8 and 9: • The transition from subsonic to
Page 10 and 11: • For the solar wind to continue
Page 12 and 13: • Waves and turbulence?- One poss
Page 15: • In summary the outer layer of t
Page 19: ω > Sunv ϕϕSun r r- At large dis
Page 22: • A meridian view of the IMF- The
Page 26 and 27: • Observations of high speed stre
Page 28: • Time series of parameters assoc
Page 31: • Plasma measurementsshow a drama
Page 35 and 36: • The magnetic field configuratio
Page 37 and 38: •The solar wind forms abubble, ca
Page 39: • The Voyager passage through the

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