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The averaged and normalized long-term (yy2012–2014 vs. yy2007–2009) SSI changes, as observed by OMI (black lines with representative ±1σ error bars) and predicted by the models. For reference, the scaled OMI solar spectrum is shown as a dotted line, along with the marked major solar lines and line blends. The small inset shows the full-scale variation of the Mg II line doublet. Dotted green lines follow the SORCE SOLSTICE (v15) data; full green lines show the SORCE SIM (v22) set.
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