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What is Global Dimming?

What is Global Dimming?-example-1
User Nondv
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Answer:

is the reduction in the amount of global direct irradiance at the earth surface that has been observed since systematic measurements began in the 1950.

User Sergey Sergeyev
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Answer:

Global dimming is the reduction in the amount of global direct irradiance at the Earth's surface that has been observed since systematic measurements began in the 1950s. The effect varies by location, but worldwide it has been estimated to be of the order of a 4–20% reduction.

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User David Scarlett
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