Lecture 3 - Atmospheric Evolution, Box Models

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Stratopause Tropopause (log scale)

description

Lecture on Box models and atmosphere.

Transcript of Lecture 3 - Atmospheric Evolution, Box Models

  • Stratopause

    Tropopause

    (log scale)

  • Cosmic abundanceof elements in theof elements in theUniverse as a function of atomic number. Abundancesare scaled so thatSilicon = 104.Adapted from Mason (1966).Mason (1966).

    Derived from spectroscopic studies

    f th l t dof the sun, supplemented by chemical analyses of meteorites.

    Atomic Number

  • Rise of oxygen: yg

    emergence of visible

    life

    Atmospheric composition i t ll dis controlled,

    to a large extent, by , y

    bio-geo-chemical

    processesprocesses

  • Earths atmospheric composition evolved over billions of yearsy

    Rise of O2 & O3