[ForYourChildren]

The post says, "In the next post, we’ll build the solar model, starting with a notch filter."

I went to link provided to look for it, but it must not be released yet. I really look forward to seeing it.

In the comment I see this conversation:

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John, who eats meat & never visits Paddington
June 16, 2014 at 6:41 am
"Thanks David,
I look forward to the additional posts, but I’m already curious what would cause an 11 year notch?. For a notch filter, you need a cancellation signal of the same amplitude and frequncy, but opposing phase. I’m guessing you already have ideas ? Another solar forcing, oceans currents, etc ?"

David Evans
June 16, 2014 at 2:19 pm

"Stumped us for months. Eventually figured it out, we think. Joanne eventually noticed the vital clue. Will be revealed soon…"

[MV=PY]

Ernest_at_the_Beach, great post. Thanks!

"a notch filter, you need a cancellation signal of the same amplitude and frequncy, but opposing phase. "

Hmmm. It may not be due to a cancellation signal (which implies something resonating at that frequency in the climate system). It could be due to something that absorbs energy at that frequency.

They assume that the climate system is linear and invariant. Is it?

Can't wait for the next installment...