The heating efficiency of the exothermic reaction H + O3 in themesosphere

Anne K. Smith; Manuel López-Puertas; Jiyao Xu; Martin G. Mlynczak

doi:10.1002/2015JD024061

The heating efficiency of the exothermic reaction H + O₃ in themesosphere

Anne K. Smith, Manuel López-Puertas, Jiyao Xu, Martin G. Mlynczak

Atmospheric Chemistry Observations & Modeling Lab

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

An important source of heating in the mesosphere is the exothermic reaction of ozone with atomic hydrogen, which generates hydroxyl in a vibrationally excited state. Some of the energy from the excited states is lost through emissions in the Meinel bands. The heating efficiency of the exothermic reaction is therefore less than one. In this study, we incorporate a model of the vibrationally excited OH into the Whole Atmosphere Community Climate Model in order to calculate the heating efficiency of this reaction interactively with the model chemistry and dynamics. The global annual mean efficiency is near 60%, but the value can differ by 20% or more depending on altitude and season. A formula for accurately including the dependence of efficiency on atomic oxygen, temperature, and pressure is given.

Original language	English
Pages (from-to)	12,739-12,747
Journal	Journal of Geophysical Research
Volume	120
Issue number	24
DOIs	https://doi.org/10.1002/2015JD024061
State	Published - Dec 27 2015

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title = "The heating efficiency of the exothermic reaction H + O3 in themesosphere",

abstract = "An important source of heating in the mesosphere is the exothermic reaction of ozone with atomic hydrogen, which generates hydroxyl in a vibrationally excited state. Some of the energy from the excited states is lost through emissions in the Meinel bands. The heating efficiency of the exothermic reaction is therefore less than one. In this study, we incorporate a model of the vibrationally excited OH into the Whole Atmosphere Community Climate Model in order to calculate the heating efficiency of this reaction interactively with the model chemistry and dynamics. The global annual mean efficiency is near 60\%, but the value can differ by 20\% or more depending on altitude and season. A formula for accurately including the dependence of efficiency on atomic oxygen, temperature, and pressure is given.",

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T1 - The heating efficiency of the exothermic reaction H + O3 in themesosphere

AU - Smith, Anne K.

AU - López-Puertas, Manuel

AU - Xu, Jiyao

AU - Mlynczak, Martin G.

PY - 2015/12/27

Y1 - 2015/12/27

N2 - An important source of heating in the mesosphere is the exothermic reaction of ozone with atomic hydrogen, which generates hydroxyl in a vibrationally excited state. Some of the energy from the excited states is lost through emissions in the Meinel bands. The heating efficiency of the exothermic reaction is therefore less than one. In this study, we incorporate a model of the vibrationally excited OH into the Whole Atmosphere Community Climate Model in order to calculate the heating efficiency of this reaction interactively with the model chemistry and dynamics. The global annual mean efficiency is near 60%, but the value can differ by 20% or more depending on altitude and season. A formula for accurately including the dependence of efficiency on atomic oxygen, temperature, and pressure is given.

AB - An important source of heating in the mesosphere is the exothermic reaction of ozone with atomic hydrogen, which generates hydroxyl in a vibrationally excited state. Some of the energy from the excited states is lost through emissions in the Meinel bands. The heating efficiency of the exothermic reaction is therefore less than one. In this study, we incorporate a model of the vibrationally excited OH into the Whole Atmosphere Community Climate Model in order to calculate the heating efficiency of this reaction interactively with the model chemistry and dynamics. The global annual mean efficiency is near 60%, but the value can differ by 20% or more depending on altitude and season. A formula for accurately including the dependence of efficiency on atomic oxygen, temperature, and pressure is given.

UR - https://www.scopus.com/pages/publications/84957441120

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DO - 10.1002/2015JD024061

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SP - 12,739-12,747

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

IS - 24

ER -

The heating efficiency of the exothermic reaction H + O₃ in themesosphere

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