Truth To Power wrote:https://www.thegwpf.org/content/uploads/2019/03/SvensmarkSolar2019.pdf
Lurkers, this is most of the Executive Summary in that report.
Snip the 1st 25%. This
is nearly an order of magnitude larger than what would be expected from solar irradiance
alone, and suggests that solar activity is getting amplified by some atmospheric process.
Three main theories have been put forward to explain the solar–climate link, which are:
• solar ultraviolet changes
• the atmospheric-electric-field effect on cloud cover
• cloud changes produced by solar-modulated galactic cosmic rays (energetic particles
originating from inter stellar space and ending in our atmosphere).
Significant efforts has gone into understanding possible mechanisms, and at the moment
cosmic ray modulation of Earth’s cloud cover seems rather promising in explaining the size of
solar impact. This theory suggests that solar activity has had a significant impact on climate
during the Holocene period. This understanding is in contrast to the official consensus from
the Intergovernmental Panel on Climate Change, where it is estimated that the change in
solar radiative forcing between 1750 and 2011 was around 0.05 W/m2, a value which is entirely negligible relative to the effect of greenhouse gases, estimated at around 2.3 W/m2.
However, the existence of an atmospheric solar-amplification mechanism would have implications for the estimated climate sensitivity to carbon dioxide, suggesting that it is much
lower than currently thought.
In summary, the impact of solar activity on climate is [I don't see any actual evidence that it is, so I would change this to "it may be"] much larger than the official consensus suggests. This is therefore an important scientific question that needs to be addressed by the scientific community.
That last sentence of the summary says it all. As I read it, it says something like, "We don't know yet what this effect is, how large it is, or anything concrete. But, we think it is worth looking into, and *hope* will prove that there is nothing we can do to stop climate change."
This is the best that TtP can find to provide some evidence that his POV is correct. IMHO, this falls far short of proving anything. But, I just read the summary.
Also, IMHO, this has been looked at by other scientists and they found no 'there' there. But, I'm just assuming this based on my understanding of how the scientific community works.
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