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Earth and Space Sciences · 术语表

什么是 Plate cooling model？

Definition 5.5 University Earth and Space Sciences — Year 3 · 第 5 章 — Thermal Models of the Lithosphere

The plate cooling model of the oceanic lithosphere takes each column as a layer $0 \le z \le L$ of uniform diffusivity, at the uniform temperature $T_m$ when it leaves the ridge, whose surface is held at $T_0$ and whose base is held at $T_m$ from then on.

$The two cooling models with the parameters of the text. (a) Depth of the isotherms from 200\, C (top) to 1400\, C (bottom): those of the half-space go on sinking as √ t, those of the plate stop as the profile becomes linear. (b) Surface heat flow: the plate model levels off at 47\, mW\, m-2, the half-space falls as 1/√ t.$

The two cooling models with the parameters of the text. (a) Depth of the isotherms from

200\,{}^{\circ}\mathrm{C}

(top) to

1400\,{}^{\circ}\mathrm{C}

(bottom): those of the half-space go on sinking as

\sqrt t

, those of the plate stop as the profile becomes linear. (b) Surface heat flow: the plate model levels off at

47\,\mathrm{mW}\,\mathrm{m}^{-2}

, the half-space falls as

1/\sqrt t

.

Depth of the ocean floor against its age: the median and the quartiles of the depths of the one-degree cells of each five-million-year bin (sea floor deeper than 1000\, m, ages from a global age grid, depths from a global relief model, no correction for sediment, seamounts or swells), with the two cooling models of the text. — Depth of the ocean floor against its age: the median and the quartiles of the depths of the one-degree cells of each five-million-year bin (sea floor deeper than $1000\,\mathrm{m}$ , ages from a global age grid, depths from a global relief model, no correction for sediment, seamounts or swells), with the two cooling models of the text.

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