National Solar-Terrestrial Research Program

Seitenzahl:

48

Gewicht:

82 g

Erschienen bei:

Cambridge Scholars Publishing

Kurzbeschreibung

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: 4 JUSTIFICATION FOR THE RECOMMENDATIONS RECOMMENDATION 1. CATEGORY A. Major Components The National Solar-Terrestrial Research Program outlined here seeks to emphasize the interconnections between disciplines by a coordinated observational and analytical study. This requires sophisticated simultaneous measurements of each of the key regions, by in situ measurements or by remote sensing as needed. The major spacecraft missions provide important observations and a focus for coordinating ground-based, rocket, balloon, and Shuttle experiments. We are confident that great new discoveries and insights will result from these improved measurements and new instrumentation. The field of solar-terrestrial research has seen a revolution in the last few years, with many unexpected but important coupling phenomena observed. Exciting new discoveries have shown the impact on the magnetosphere of outflowing energized ionospheric plasma. The existence of electrostatic double layers have been demonstrated, leading to an alternative outlook based more on the continuity of electric current than on the motion of magnetic field lines. Such double layers may be of basic importance on the Sun, and within the auroral circuit, and give a new importance to small-scale phenomena in the global system. The discovery of coronal holes as a major source of high-speed solar-wind streams has led to a necessity for three-dimensional models of solar-wind generation. Variability in solar ultraviolet flux can affect stratospheric ozone levels, with serious consequences to the biosphere. Magnetospheric convection has been shown to drive upper-atmospheric motions via ion-neutral colli- sions, and surprisingly, the converse has also been shown to be true?the upper atmosphere keeps the magnetosphere in notio...

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Mehr von:  National Instruments, Cambridge Scholars Publishing