Difference between revisions of "Total solar irradiance"

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<div class="definition"><div class="short_definition">(Abbreviated TSI.) The amount of [[solar radiation]] received outside the earth's  [[atmosphere]] on a surface normal to the incident [[radiation]], and at the earth's mean distance from  the sun.</div><br/> <div class="paragraph">Reliable measurements of solar radiation can only be made from space and the precise record  extends back only to 1978. The generally accepted value is 1368 W m<sup>&minus;2</sup> with an [[accuracy]] of  about 0.2%. Variations of a few tenths of a percent are common, usually associated with the passage  of sunspots across the solar disk. The [[solar cycle]] variation of TSI is on the order of 0.1%.</div><br/> </div>
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<div class="definition"><div class="short_definition">(Abbreviated TSI.) The amount of [[solar radiation]] received outside the earth's  [[atmosphere]] on a surface normal to the incident [[radiation]], and at the earth's mean distance from  the sun.</div><br/> <div class="paragraph">Reliable measurements of solar radiation can only be made from space and the precise record  extends back only to 1978. The generally accepted value is 1368 W m<sup>-2</sup> with an [[accuracy]] of  about 0.2%. Variations of a few tenths of a percent are common, usually associated with the passage  of sunspots across the solar disk. The [[solar cycle]] variation of TSI is on the order of 0.1%.</div><br/> </div>
 
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Latest revision as of 16:20, 20 February 2012



total solar irradiance

(Abbreviated TSI.) The amount of solar radiation received outside the earth's atmosphere on a surface normal to the incident radiation, and at the earth's mean distance from the sun.

Reliable measurements of solar radiation can only be made from space and the precise record extends back only to 1978. The generally accepted value is 1368 W m-2 with an accuracy of about 0.2%. Variations of a few tenths of a percent are common, usually associated with the passage of sunspots across the solar disk. The solar cycle variation of TSI is on the order of 0.1%.


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