Interesting - I wonder what drives the higher harmonics?
If you have the time, it would be great to make a boot strap reconstruction of the data, and then use it to predict forwards to the next decade. So take the amplitudes andphases of say the 4 largest frequency components, then reconstruct the time waveform from these sine and cosine functions.
Nothing 'drives' them as such, just like nothing drives the harmonics of a violin string. Any signal that is sinusoidal in nature will always yield a regular family of harmonics that will get damped to varying degrees. I'd need at least ten times more data points for a projection that might do the business, but next up will be an expansion back to 1925 that will enable me to engage time series techniques!
Is this related in any simple way to insolation (heat input), which must be a bunch of sine waves due to orbital mechanics? I.e. is it just what you’d expect? I’d guess someone has done this analysis before and may have figured it out?
Orbital mechanics leading to sine waves that induce harmonics (as all sine waves do) is pretty much how I see it. I've not seen anybody talking about sea ice as a musical signal but then again I am married to a professional musician! Coming up will be an attempt to push the annual record back to 1925, and I'm very much looking forward to getting stuck in to that.
"we are looking at the sound of the sea ice . . . "
I like to think I subscribe to see old fashioned maths & rational science, statistics and so on. Actually, I love the finely detailed graphics that you draw with words.
I've been out & about but offline for a week or more & catching up with the output from you & a few others is a bit depressing. My travels reinforced the notion that we few are just that - a very few. 90%-95% of the population continue to demonstrate, or even brag, about their stupidity.
Last night, I made some bread. It'll come in handy later for sopping up several measures of Jamesons' finest triple distilled.
Yes, it can be depressing. On the subject of climate change my brother in law thinks the sun shines out of Thunberg's arse, and on the subject of mask wearing my nephew has disowned me. Both have their smartphone thinking for them. Whenever I make bread I feel there is magic happening; we may take solace in a slice!
Well, speaking as a violinist, that’s extraordinary! And beautiful!
Isn't it just?!
Interesting - I wonder what drives the higher harmonics?
If you have the time, it would be great to make a boot strap reconstruction of the data, and then use it to predict forwards to the next decade. So take the amplitudes andphases of say the 4 largest frequency components, then reconstruct the time waveform from these sine and cosine functions.
Nothing 'drives' them as such, just like nothing drives the harmonics of a violin string. Any signal that is sinusoidal in nature will always yield a regular family of harmonics that will get damped to varying degrees. I'd need at least ten times more data points for a projection that might do the business, but next up will be an expansion back to 1925 that will enable me to engage time series techniques!
Is this related in any simple way to insolation (heat input), which must be a bunch of sine waves due to orbital mechanics? I.e. is it just what you’d expect? I’d guess someone has done this analysis before and may have figured it out?
Orbital mechanics leading to sine waves that induce harmonics (as all sine waves do) is pretty much how I see it. I've not seen anybody talking about sea ice as a musical signal but then again I am married to a professional musician! Coming up will be an attempt to push the annual record back to 1925, and I'm very much looking forward to getting stuck in to that.
"we are looking at the sound of the sea ice . . . "
I like to think I subscribe to see old fashioned maths & rational science, statistics and so on. Actually, I love the finely detailed graphics that you draw with words.
I've been out & about but offline for a week or more & catching up with the output from you & a few others is a bit depressing. My travels reinforced the notion that we few are just that - a very few. 90%-95% of the population continue to demonstrate, or even brag, about their stupidity.
Last night, I made some bread. It'll come in handy later for sopping up several measures of Jamesons' finest triple distilled.
Yes, it can be depressing. On the subject of climate change my brother in law thinks the sun shines out of Thunberg's arse, and on the subject of mask wearing my nephew has disowned me. Both have their smartphone thinking for them. Whenever I make bread I feel there is magic happening; we may take solace in a slice!