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

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Results<br />

• From 1933 to late 1940s, the <strong>transmittance</strong> remained stable at around<br />

0.74 to 0.75.<br />

• Decreasing phase followed to the mid-1980s when it reached 0.69.<br />

• It then turned into be increasing phase till the early 2000s marking the<br />

level <strong>of</strong> 0.71.<br />

<strong>Long</strong>-<strong>term</strong> <strong>variations</strong> <strong>of</strong> annual mean <strong>transmittance</strong> at 14 stations in Japan.<br />

A black thick line shows average among 14 stations.

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