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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Geotherm？

Definition 10.7 University Earth and Space Sciences — Year 1 · 第 10 章 — The Earth’s Heat Budget

The geotherm beneath a point of the surface is the temperature as a function of depth there, $T(z)$ . It is a steady conductive geotherm when it does not change with time and heat is carried along it by conduction alone.

Steady conductive geotherms of a continent with heat production A_0 = 2.5\, µ W\, m-3 decreasing over D = 10\, km, k = 2.5\, W\, m-1\, K-1, for three surface heat flows (reduced heat flow 15, 30 and 45\, mW\, m-2). Each follows its conductive curve (dashed beyond) down to the mantle adiabat, which it meets at the dot: the base of the thermal lithosphere. The ocean-floor geotherm is that of a half-space cooled for 60\, Myr. Uniform conductivity is a simplification. — Steady conductive geotherms of a continent with heat production $A_0 = 2.5\,\text{µ}\mathrm{W}\,\mathrm{m}^{-3}$ decreasing over $D = 10\,\mathrm{km}$ , $k = 2.5\,\mathrm{W}\,\mathrm{m}^{-1}\,\mathrm{K}^{-1}$ , for three surface heat flows (reduced heat flow 15, 30 and $45\,\mathrm{mW}\,\mathrm{m}^{-2}$ ). Each follows its conductive curve (dashed beyond) down to the mantle adiabat, which it meets at the dot: the base of the thermal lithosphere. The ocean-floor geotherm is that of a half-space cooled for $60\,\mathrm{Myr}$ . Uniform conductivity is a simplification.

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