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Long-term variations of atmospheric transmittance from ... - GEWEX

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Data rescue<br />

Recently, the results <strong>of</strong><br />

direct solar radiation<br />

measurements by<br />

pyrheliomaters were<br />

digitized, providing the<br />

basis for the study <strong>of</strong> long<strong>term</strong><br />

<strong>variations</strong> <strong>of</strong><br />

<strong>atmospheric</strong> <strong>transmittance</strong><br />

for more than 70 years. <br />

An original record <strong>of</strong> pyrheliometer measurements<br />

(at Fukuoka station in Aug. 1932)

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