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A Snapshot of the Sun Near Solar Minimum: The Whole Heliosphere Interval |
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| Authors: | Barbara J Thompson Sarah E Gibson Peter C Schroeder David F Webb Charles N Arge Mario M Bisi Giuliana de Toma Barbara A Emery Antoinette B Galvin Deborah A Haber Bernard V Jackson Elizabeth A Jensen Robert J Leamon Jiuhou Lei Periasamy K Manoharan M Leila Mays Patrick S McIntosh Gordon J D Petrie Simon P Plunkett Liying Qian Peter Riley Steven T Suess Munetoshi Tokumaru Brian T Welsch Thomas N Woods |
| Institution: | 1. NASA Goddard Space Flight Center, Greenbelt, MD, USA 2. High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, USA 3. Space Sciences Laboratory, University of California, Berkeley, CA, USA 4. ISR, Boston College, Newton, MA, USA 5. Hanscom AFB Research Laboratory, Hanscom, MA, USA 6. Center for Astrophysics and Space Sciences, University of California San Diego, La Jolla, CA, USA 7. Institute of Mathematics and Physics, Aberystwyth University, Aberystwyth, Wales, UK 8. EOS, University of New Hampshire, Durham, NH, USA 9. JILA, University of Colorado, Boulder, CO, USA 10. Planetary Science Institute, Tucson, AZ, USA 11. Montana State University, Bozeman, MT, USA 12. School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China 13. Radio Astronomy Centre, Tata Institute of Fundamental Research, Ooty, Tamil Nadu, India 14. ORAU at NASA Goddard Space Flight Center, Greenbelt, MD, USA 15. Heliosynoptics, Inc., Boulder, CO, USA 16. National Solar Observatory, Tucson, AZ, USA 17. Naval Research Laboratory, Washington, DC, USA 18. Predictive Science, San Diego, CA, USA 19. National Space Science and Technology Center, 320 Sparkman Drive, Huntsville, AL, USA 20. STELab, Nagoya University, Nagoya, Japan 21. LASP, University of Colorado, Boulder, CO, USA |
| Abstract: | We present an overview of the data and models collected for the Whole Heliosphere Interval, an international campaign to study the three-dimensional solar?Cheliospheric?Cplanetary connected system near solar minimum. The data and models correspond to solar Carrington Rotation 2068 (20 March??C?16 April 2008) extending from below the solar photosphere, through interplanetary space, and down to Earth??s mesosphere. Nearly 200 people participated in aspects of WHI studies, analyzing and interpreting data from nearly 100 instruments and models in order to elucidate the physics of fundamental heliophysical processes. The solar and inner heliospheric data showed structure consistent with the declining phase of the solar cycle. A closely spaced cluster of low-latitude active regions was responsible for an increased level of magnetic activity, while a highly warped current sheet dominated heliospheric structure. The geospace data revealed an unusually high level of activity, driven primarily by the periodic impingement of high-speed streams. The WHI studies traced the solar activity and structure into the heliosphere and geospace, and provided new insight into the nature of the interconnected heliophysical system near solar minimum. |
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