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Solar Variability, Weather, and Climate reassesses the question of solar variability and its effects on weather and climate, taking into account new measurements and more recent theories of the earth's atmosphere. The papers, which make up this book, were presented at an American Geophysical Union meeting in December 1978. Besides a review of the current basic knowledge on the topic, fundamental questions requiring additional research form the basis of the conclusions and recommendations.

Eight papers, five stating the background and three the possible mechanisms, comprise the book. Solar, weather, and climate variability and evidence of the effect of solar variations on the atmosphere are reviewed. Solar variability is recognized to exist at different time scales (from minutes to decades), and these variations cover a broad range of the spectral irradiance (from X rays and extreme ultraviolet to the centimeter wavelengths). Regarding total luminosity, the parts of the solar constant that are known to vary constitute less than 1% of the total budget of energy that the earth receives from the sun and is far less than the total energy required to force direct changes in atmospheric circulation. Moreover, the variable portions of the solar output are mainly absorbed or dissipated in the upper atmosphere. Thus, for known solar changes to perturb the dynamics of the troposphere they must work through mechanisms that are complex and indirect. A number of such possible dynamic, radiative, chemical, and electrical couplings of solar inputs through various regions of the atmosphere are discussed in chapters 6, 7, and 8.