U.S.-China Cooperative Research: Solar Seismological and Long-Term Variability Studies

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The research objectives are to obtain and analyze observations of solar oscillations and long-term solar variability taken at SCLERA (The University of Arizona Santa Catalina Laboratory for Experimental Relativity by Astrometry) and at Yunnan Observatory near Kunming, China. The international collaboration has been organized in order to furnish observations of the Sun covering a sizeable fraction of a day and, consequently, to significantly reduce the otherwise serious effects of false diurnal signals present in the data of a single site. The observations will be obtained with the SCLERA solar seismographs currently in operation at the University of Arizona and at Yunnan Observatory. The set of facilities offers research and educational opportunities that are at the forefront of solar physics for both U.S. and Chinese scientists through a relatively low-cost ground-based program. The first results from the international cooperation are expected to yield improved information about the structure of the interior regions of the Sun and about long-term solar variability, which may have an impact on long-term variations in the Earth's climate.