Temporal Pillars: Queen Anne's Bounty, The Ecclesiastical Commissioners. and the Church of England. By G. F. A. Best. Cambridge: Cambridge University Press, 1964. xiv, 582 pp. $12.50.

Davies, Horton

doi:10.2307/3162916

Cited by 1 publication

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“…respectively. The transit or convective timescale t c = (h 2 /) Ra −2/3 [Davies, 1999] is taken as characteristic, such that nondimensional times reported for the mobile continent model are given by…”

Section: Numerical Modelmentioning

confidence: 99%

Temperature beneath continents as a function of continental cover and convective wavelength

Phillips¹,

Coltice²

2010

J. Geophys. Res.

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[1] Geodynamic modeling studies have demonstrated that mantle global warming can occur in response to continental aggregation, possibly leading to large-scale melting and associated continental breakup. Such feedback calls for a recipe describing how continents help to regulate the thermal evolution of the mantle. Here we use spherical mantle convection models with continents to quantify variations in subcontinental temperature as a function of continent size and distribution and convective wavelength. Through comparison to a simple analytical boundary layer model, we show that larger continents beget warming of the underlying mantle, with heating sometimes compounded by the formation of broader convection cells associated with the biggest continents. Our results hold well for purely internally heated and partially core heated models with Rayleigh numbers of 10 5 to 10 7 containing continents with sizes ranging from that of Antarctica to Pangea. Results from a time-dependent model with three mobile continents of various sizes suggests that the tendency for temperatures to rise with continent size persists on average over timescales of billions of years.Citation: Phillips, B. R., and N. Coltice (2010), Temperature beneath continents as a function of continental cover and convective wavelength,

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Section: Numerical Modelmentioning

confidence: 99%