Influence of atmospheric dust on non-telescopic sunspot observations |
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Authors: | Sultan Hameed Gaofa Gong |
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Institution: | (1) Institute of Terrestrial and Planetary Atmospheres, State University of New York, 11790-2300 Stony Brook, NY, U.S.A.;(2) Present address: Institute of Geography, Academia Sinica, Beijing, China |
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Abstract: | Catalogues of non-telescopic sunspot observations from the Orient have been presented by several authors. Since atmospheric dust facilitates naked-eye observation of the Sun we investigate its possible influence by comparing the historical records of sunspot sightings and atmospheric dust storms. A distinction is made between the record up to the end of the Ming dynasty that is based on court documents and the post-Ming reports that are all provincial sightings. The earlier record is found to be significantly anti-correlated with C-14 fluctuations while the latter one is weakly anti-correlated. The provincial sightings contain a much larger signature of atmospheric turbidity, as is also indicated by their poor comparison with telescopic data. |
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