Tuesday, December 19, 2017

Missing News: Solar impact on climate seven times greater than climate models suggested

Wow, Great Story from Graham Lloyd at the Oz about a new paper by an ABC missing voice Henrik Svensmark:

The impact of changes in solar activity on Earth’s climate was up to seven times greater than climate models suggested according to new research published today in Nature Communications.
Researchers have claimed a breakthrough in understanding how cosmic rays from supernovas react with the sun to form clouds, which impact the climate on Earth.
The findings have been described as the “missing link” to help resolve a decades long controversy that has big implications for climate science.
Lead author, Henrik Svensmark, from The Technical University of Denmark has long held that climate models had greatly underestimated the impact of solar activity.
He says the new research identified the feedback mechanism through which the sun’s impact on climate was varied.
Read the rest at the link above, or at videnskab.dk you won't read this on "our" ABC.


Increased ionization supports growth of aerosols into cloud condensation nuclei
H. Svensmark 1, M.B. Enghoff 1, N.J. Shaviv2 & J. Svensmark1,3
Ions produced by cosmic rays have been thought to influence aerosols and clouds. In this study, the effect of ionization on the growth of aerosols into cloud condensation nuclei is investigated theoretically and experimentally. We show that the mass-flux of small ions can constitute an important addition to the growth caused by condensation of neutral molecules. Under present atmospheric conditions the growth rate from ions can constitute several percent of the neutral growth rate. We performed experimental studies which quantify the effect of ions on the growth of aerosols between nucleation and sizes >20 nm and find good agreement with theory. Ion-induced condensation should be of importance not just in Earth’s present day atmosphere for the growth of aerosols into cloud condensation nuclei under pristine marine conditions, but also under elevated atmospheric ionization caused by increased supernova activity.

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