WHY IS THE SOLAR CONSTANT NOT A CONSTANT?
WHY IS THE SOLAR CONSTANT NOT A CONSTANT?
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DOI：
10.1088/0004-637x/747/2/135
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
Ke-Jun Li;W. Feng;J. Xu;Peng Gao;L. Yang;H. Liang;L. Zhan
中科院分区：
文献类型：
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作者：
Ke-Jun Li;W. Feng;J. Xu;Peng Gao;L. Yang;H. Liang;L. Zhan
In order to probe the mechanism of variations of the solar constant on the inter-solar-cycle scale, the total solar irradiance (TSI; the so-called solar constant) in the time interval of 1978 November 7 to 2010 September 20 is decomposed into three components through empirical mode decomposition and time–frequency analyses. The first component is the rotation signal, counting up to 42.31% of the total variation of TSI, which is understood to be mainly caused by large magnetic structures, including sunspot groups. The second is an annual-variation signal, counting up to 15.17% of the total variation, the origin of which is not known at this point in time. Finally, the third is the inter-solar-cycle signal, counting up to 42.52%, which is inferred to be caused by the network magnetic elements in quiet regions, whose magnetic flux ranges from (4.27–38.01) × 1019 Mx.
