James A. Peden - better known as Jim or "Dad" - Webmaster of Middlebury Networks and Editor of the Middlebury Community Network, spent some of his earlier years as an Atmospheric Physicist at the Space Research and Coordination Center in Pittsburgh and Extranuclear Laboratories in Blawnox, Pennsylvania, studying ion-molecule reactions in the upper atmosphere. As a student, he was elected to both the National Physics Honor Society and the National Mathematics Honor Fraternity, and was President of the Student Section of the American Institute of Physics. He was a founding member of the American Society for Mass Spectrometry, and a member of the American Institute of Aeronautics and Astronautics. His thesis on charge transfer reactions in the upper atmosphere was co-published in part in the prestigious Journal of Chemical Physics. The results obtained by himself and his colleagues at the University of Pittsburgh remain today as the gold standard in the AstroChemistry Database. He was a co-developer of the Modulated Beam Quadrupole Mass Spectrometer, declared one of the "100 Most Significant Technical Developments of the Year" and displayed at the Museum of Science and Industry in Chicago.
Read his Editorial: 'The Great Global Warming Hoax?'
Gavin: I needed some refreshing.
me too and is why I suggested to ask you I thought maybe you had some more recent experience with it. You have my apolgy for the imposition.
whoops, concatenating
Luke,
As insolation is a "measurement" of solar radiation, your graph above,is quite problematical.
Given we only recently had the technical ability measure insolation, say 200 years?, then the rest are non-measurements and clearly concatening oranges and figs.
So how did our neolithic forbears measure insolation?
A real scientist would not make such a gaffe.
http://amper.ped.muni.cz/gw/articles/graphs/ins-5-2.png is the correct url as Gavin has deduced.
It is a graph of -500 ka to 200 ka from present, made for a rather low 1366.3 W/m2 solar constant again. -400 ka summer insolation minimum was some 10 W/m2 lower than that one we have almost reached already. No pronounced decline of solar orbital summer forcing at 65° N is ahead of us next 50 ka (low solar orbital summer forcing at 65° N being needed for onset of glaciation).
Jan Hollan says we should not extrapolate past trends (like decline in summer insolation, or the shape of the past glaciation cycles). We should look at reliably computed past, current and future forcings instead. It's evident we have almost reached the near-future insolation minimum already.
Before the atmosphere returns to normal (thousands of years), we will be on the increasing part of the insolation curve again...
(The Laskar reference (Harvard) is the basis behind the calculations).
Gavin - it was Critec in Tasmania that did much of the lightning and transient suppression research - their products live on - http://www.erico.com/
Jan: some patience required, see my link correction
http://amper.ped.muni.cz/gw/articles/graphs/ins-5-2.png
Re superstition of waves, beats, sum and difference, destructive interference, shock waves etc I needed some refreshing.
http://www.kettering.edu/~drussell/Demos/superposition/superposition.html
Tesla, coils, pulses, damped waves, phase locked loops and so on is another branch. From a very fuzzy memory, I can recall asking an important electrical utility operator where the network control depended on signals added to high voltage transmission cables how they protected their system from external pulses. I got a long story over the phone. Australia at that time was leading technical design in lightening arresting techniques, phase shift with load and drop out back flash.
Re Simulation: This chip (note the wave diagrams), a video tube and a modulated solid state RF device became someone’s idea for their crude radio cam.
http://www.cds.caltech.edu/~murray/books/AM05/wiki/index.php?title=Phase_locked_loop
See also Broadband on power lines.
http://www.acma.gov.au/WEB/STANDARD/pc=PC_2847
Luke:hamper.ped.muni.cz/gw/articles/graphs/ins-5-2.png
Doesn't work.
I like the Harvard one.
Why a long interglacial?
http://amper.ped.muni.cz/gw/articles/html.format/orb_forc.html
http://www.sciencemag.org/cgi/content/summary/297/5585/1287
http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993A%26A...270..522L&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf
and
hamper.ped.muni.cz/gw/articles/graphs/ins-5-2.png
Mr T,Yes, seems that warming is rapid and cooling is slow
the secular cooling is steady the warming is irregular - it's all in the perspective.
perhaps you should ask Gavin about superposition of small high frequency signals on large low frequency ones. Perhaps he can also explain beating and why 3 overlapping Milankovich cycles should cause a longer interglacial than usual.