In reply to Spaceman Spiff & new member "tmfpaer"
I am not sure why there is this sudden interest in solar modulation of planetary cloud cover. See the Baud thread “solar cycle 24” for details concerning the hypothesized solar cloud modulating mechanisms (electroscavenging and GCR modulation).
Spaceman Spiff, my comments are included your links. For example see your second here, my comment #99 (made in 2006) which is:
The criticism of Svensmark and colleagues’ search for a solar forcing mechanism is perhaps unfair, as there is significant Palaeoclimatic proxy data that links concurrent changes in cosmogenic isotopes (solar forcing evidence) with ice core and other proxy evidence of rapid climatic changes. There is a smoking gun, so to speak. If the smoking gun data is accepted, the question then becomes how the sun likely causes rapid climatic change events, not if the sun causes rapid climatic change events.
For example the paper: “The role of solar forcing upon climate change” Published 1999.
http://www.gg.rhbnc.ac.uk/elias/teaching/VanGeel.pdf
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“A number of those Holocene climate cooling phases… most likely of a global nature (eg Magney, 1993; van Geel et al, 1996; Alley et al 1997; Stager & Mayewski, 1997) … the cooling phases seem to be part of a millennial-scale climatic cycle operating independent of the glacial-interglacial cycles (which are) forced (perhaps paced) by orbit variations.”
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“… we show here evidence that the variation in solar activity is a cause for the millennial scale climate change.”
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Last 40 kyrs
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Figure 2 in paper. (From data last 40 kyrs)… “conclude that solar forcing of climate, as indicated by high BE10 values, coincided with cold phases of Dansgaar-Oeschger events as shown in O16 records”
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Recent Solar Event
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“Maunder Minimum (1645-1715) “…coincides with one of the coldest phases of the Little Ice Age… (van Geel et al 1998b)
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Periodicity
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“Mayewski et al (1997) showed a 1450 yr periodicity in C14 … from tree rings and …from glaciochemicial series (NaCl & Dust) from the GISP2 ice core … believed to reflect changes in polar atmospheric circulation..”
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