Some help for the TC model

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Originally posted by Joe Meert:
a)(2).....Here's a bone for you: Increased spreading such as what you propose would generate significant continental flooding without the need for any extra water.

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b)(6)How long does it take to relax the thermal anomaly generated by the decreased viscosity (if that is the cause)? Express this answer quantitatively.

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a)What causes the flooding? Only thing I can think of is the bow waves thrown up by the continents as they steam around at speeds in the miles per hour range, but that would probably cause tsunamis instead of floods per se.....b)Doesn`t the thermal anomaly cause the reduced viscosity? If not what does? If the decrease in viscosity is due to the anomalous temperatures how can the decreased viscosity cause the thermal anomaly?

Hey Joe any chance of providing definitions of the terms in that equation for us thickies who don`t have access to a decent library?

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Originally posted by Joe Meert:
1)t=average age of subducted crust

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2)T₀=surface temperature, nominally taken as zero

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3)k=diffusivity term

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1)t or tau is average age? Theres an integral involving dt so t being a constant seems odd....2)Does it matter what temperature range you use? I`m guessing its not Kelvin if its normally aproximated to zero....So is it Centigrade?(sorry about that second one but certain equations like L = sigmaT⁴ give funny results if you use the wrong scale....)3)Oh thats nice.... Um Joe (insert embaressed looking smilie here) what is the diffusion constant? Is it a constant or a function of something else? Sorry i have to keep asking like this....4)Ummmm.... What is the alpha_v....

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[This message has been edited by joz, 03-22-2002]

[QUOTE]Originally posted by Joe Meert:
[B]1)JM:Average age; however, it falls out of the integration; note the 1/tau term outside the integral will factor into the integration because the integration is done from 0 to tau.2)JM: kappa=K/pc ....It has units of length^2/time, but the K (thermal conductivity) tells you its related to how far/fast heat diffuses. Does that help? It is not a constant (hint: this is a term that will cause TC fits when he starts to model).
[B][/QUOTE]1)Sorry I`m still not getting how t is average age instead of tau....Could you work through a brief example for me please?2)Hmmm k[Kg.m/K.s<sup>3</sup>] so to end up with Kappa [m<sup>2</sup>/s] pc needs units [Kg/K.m.s<sup>2</sup>]...Ok i`ll bite Joe what is pc?

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Originally posted by Joe Meert:
1)JM: Tau, is average age. Sorry, thought that was clear. During integration, the solution is

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2/3t^3/2 evaluated from 0 to tau. the final expression looks the same as I gave earlier except the integral is removed and the expression is multiplied by 1/tau (means the final tau is tau^1/2 and the constant is 4/3.

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2)pc= is actually rho* c....Rho=density and has units of kg/m³. c is specific heat and has units of Joules/kg*C. Now, to anticipate your next question, joules are kg*m²/s²....cancelling all you get

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kappa = kg*m² * m³ * sec²*^oC / m * ^oC * sec³*kg*m²

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if i've copied this correctly, you get kappa= m²/sec

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1)Okey doke... If tau`s average age it makes sense it was the confusion over whether it (average age) was t or tau that got me....2)I was thinking p might be a rho but I figured it would be easier to ask.....Sorry about all the pesky details Joe....

Ok so the units of alpa_v are [K^-1]?If so I think I understand the equation....

You`re a cruel man Joe, making him do all this work to falsify his own hypothesis....Oh and TC you want to use S.I units....(I hope his "collage (sic) level" physics includes S.I units....)

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Originally posted by TrueCreation:
Hm.. well I guess you missunderstood my post, I am not questioning the physics, but the way variables should be expressed such as my example of meters, feet, kilometers, centegrade, kalvin, etc. Do you see what I am getting at? I had just looked over your paper at http://www.clas.ufl.edu/users/jmeert/oceans.htm, I found that you answer my questions at your reference 7 as to the form of expression. Though Velocity, what unit of measure should be used, the same for age, mantle temp, average age of subducted crust, and at what depth is mantle density taken at?

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Already told you TC use SI units....

TC do the work or admit defeat...I am getting tired (and I am sure Joe is as well) of your endless prevarication....