To: Wharf Rat who wrote (1110475 ) 1/14/2019 5:04:50 PM From: maceng2 Respond to Interesting paper. I would probably agree with your conclusions on it, and I will read it later. youtube.com siliconinvestor.com theguardian.com Ilya Usoskin , head of the Oulu Cosmic Ray Station and Vice-Director of the ReSoLVE Center of Excellence in Research, published a critique of Zharkova’s solar model making those points. Most importantly, the model fails in reproducing past known solar activity because Zharkova’s team treats the sun as a simple, predictable system like a pendulum. In reality, the sun has more random and unpredictable (in scientific terms, “stochastic”) behavior: For example, a perfect pendulum – if you saw a few cycles of the pendulum, you can predict its behavior. However, solar activity is known to be non-stationary process, which principally cannot be predicted (the prediction horizon for solar activity is known to be 10-15 years). Deterministic prediction cannot be made because of the essential stochastic component. Just imagine a very turbulent flow of water in a river rapid, and you throw a small wooden stick into water and trace it. Then you do it second time and third time ... each time the stick will end up in very different positions after the same time period. Its movement is unpredictable because of the turbulent stochastic component. This is exactly the situation with solar activity.
