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@lapogus, Feb 23, 2018 at 4:10 PM

The magnitude of tidal range is not just a result of the gravitational pull of the Sun and Moon. It varies so much mainly due to the oceans effectively sloshing around...

Anyone able/willing to do a comparison of:

EM's http://www.esri.com/news/arcuser/0703/geoid1of3.html

and

http://moocs.southampton.ac.uk/oceans/2014/11/09/amphidromic-points-tidal-spiders-in-a-real-world/

Wondering if tides correlate with EM's highs.

Feb 23, 2018 at 7:25 PM | Registered CommenterPcar

Entropic Man

Thank you for yours at 9.52 a.m.

"Both [science and history] share the same problem, assessing the quality of the data available and reconciling sources which appear to contradict each other."

Absolutely! But I'm not aware (my ignorance probably - you may be able to quote lots of examples) where the historical record suggesting it was warmer in the past (i.e. the past when the written record is available) conflicts with any historical record conflicting with it. In my last post, I pointed out two papers, based on proxies, both directly contradicting each other (as opposed to appearing to contradict each other), both apparently cited by you with approval, and both apparently approved of by the climate alarmist industry. I think there's a difference between the two disciplines (science - or more precisely, climate science - and history) for that reason alone, even if you don't. What does your wife think?

You haven't responded to my query as to which of the two conflicting scientific reports you prefer, and why. However, I do accept that you're busy here at the moment, as you're under fire on several fronts.

I continue to be grateful for your presence here, as you do make me think harder than I otherwise might, and continue to inform me of areas of science of which I would otherwise be ignorant, so thank you for that. But I don't think I "accuse[d] an entire scientific profession of" anything. I speculated about the hypothetical potential motivations of some, which isn't quite the same thing; in fact isn't the same thing at all. A bit of a straw man from you there, I think, to deflect from the fact that you haven't really dealt with the points made in my last post at all?

Feb 23, 2018 at 7:22 PM | Unregistered CommenterMark Hodgson

@kleinefeldmaus, Feb 23, 2018 at 1:20 AM

British Horse Racing is ‘Too White’, Industry Told

Sexist too ! Not enough wimmin jockeys let alone that Metros. are not represented at all. Need a white oops black paper written in parliament.

That's a great idea, women in Metros vs Men on horses - the jumps would be added excitement :)

Feb 23, 2018 at 7:03 PM | Registered CommenterPcar

In my experience the worst teachers were those who went from school to university and back to school without any contract with real life. The best teacher I had were people who had served in WW2 and the Korean war. They had authority and genuine compassion and care about their charges. Pupil spot this immediately and respond positively.

Feb 23, 2018 at 5:35 PM | Unregistered CommenterRoss Lea

Feb 23, 2018 at 4:10 PM | lapogus

Whilst EM's response is awaited .......

As a yottie, tides are really simple. But the more you get involved with them, the more complex they become. They are at least predictable. There is a minor tidal slop across the Adriatic, which can be exacerbated or cancelled out by variations in atmospheric pressure, as a ballpark guestimate 2-300mm.

Biggest Tidal Range, Bay of Fundy, Newfoundland, followed by Channel Islands and Bristol Channel.

The "resonant frequency" of bridges, triggered by soldiers marching on them, was ingrained into the Military before the end of WW2. I don't know any specific details, but many War Time designed and used, relocatable Bailey Bridges were still in use as long term temporary structures into the 1990s (still are?) with very big warning signs banning troops from marching over them. (The Thames Millenium Bridge Designers failed to test for this.)

https://en.m.wikipedia.org/wiki/Bailey_bridge
"The  is a type of portable, pre-fabricated, truss bridge. It was developed by the British during World War II for military use and saw extensive use by British, Canadian and US military engineering units."

I don't know whether the span and design of Bailey Bridges made them particularly vulnerable to the pitter-patter of big booted marching feet.

Feb 23, 2018 at 5:14 PM | Unregistered Commentergolf charlie

Times letter in support of National Trust not allowing Ineos to do seismic testing.
"We North Yorkshire landowners.."
Only recognisable name us Selina Scott
Most are posh names.

Feb 23, 2018 at 4:25 PM | Registered Commenterstewgreen

EM - I have been working all day. The magnitude of tidal range is not just a result of the gravitational pull of the Sun and Moon. It varies so much mainly due to the oceans effectively sloshing around as a consequnce of the Earth's rotation with respect to the Sun and Moon, and the Moon's orbit. Hence the range varies greatly depending on location - it is massive in Newfoundland and considerable in Cornwall, but nothing to write home about elsewhere. The tiny variations in the gravitational force is compounded by other factors including the period of the Earth's rotation, geographic position, bathography and island and coastal obstructions. (Think of a few dozen soldier's marching in unison across a bridge which is designed to take much heavier loads - if their steps coicide with the bridge's resonant frequency each up down movement of the bridge will be amplified, until possibly causing a catastrophic failure of the bridge's fails). [My father once told me that this happened to a bridge in WW2 - the British soldiers always took care to walk across it, but when the Japanese captured the bridge they made the mistake of marching, and the bridge collapsed. I don't know iof the story is true but my father had an uncle who despite the odds survived the Burma railway, so it could be].

If the tidal range is purely due to this minute but direct gravitational force exerted by Moon and Sun as you suggest, then how come there is next to no tide in the Mediteranean, or the Great Lakes, or Loch Rannoch for that matter?

Why don't you just admit that your Greenland Ice sheet theory (that it causes a 30m rise in the local sea level due to it's gravitiational mass) is bollocks? It would save me time and you further embarrasment.

Feb 23, 2018 at 4:10 PM | Registered Commenterlapogus

stewgreen

SpaceX have reasonable "previous" iterating never before tried landing dynamics - they will get it to work.

Tesla Model 3 though ... is looking wobbly.

Feb 23, 2018 at 4:03 PM | Registered Commentertomo

Ah, physicists!

https://www.xkcd.com/793/

Feb 23, 2018 at 4:02 PM | Unregistered CommenterEntropic man

"Ahead of launch, Elon Musk put this image of the boat and net tasked with catching the Falcon 9 fairing on Instagram. Musk said the fairing has onboard thrusters and a guidance system to bring it through the atmosphere intact.
* He later confirmed boat had failed to catch the part *"

Feb 23, 2018 at 3:23 PM | Registered Commenterstewgreen

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