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Understanding Atmospheric Composition and Radiosonde Data Analysis

This lecture by Paul Connolly and Geraint Vaughan explores the composition of the atmosphere, focusing on trace gases like water vapor, carbon dioxide, and ozone. It includes an analysis of radiosonde data from European stations, discussing how to interpret temperature and potential temperature profiles. The presentation also highlights the differences in atmospheric layers such as the troposphere and stratosphere, using examples from the VOCALS field project to illustrate trends in inversion heights and their relation to oceanic conditions.

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Understanding Atmospheric Composition and Radiosonde Data Analysis

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  1. Lecture 1 Paul Connolly Geraint Vaughan

  2. Atmospheric composition Other gases in trace amounts are water vapour, carbon dioxide and ozone.

  3. Atmospheric composition http://www.cira.colostate.edu/people/view.php?id=65 Images taken from google images.

  4. Radiosondes Vaisala RS80 Vaisala RS92 European radiosonde stations (launch 00 and 12 UTC) Launching a radiosonde Data available from: http://weather.uwyo.edu/upperair/sounding.html

  5. Examples of radiosonde profiles: temperature vs height stratosphere stratosphere T T troposphere troposphere I stratosphere stratosphere T troposphere T T : tropopause; I: inversion (top of boundary layer in this case) troposphere I

  6. Examples of radiosonde profiles: potential temperature vs height Note: θ always increases with height – we can use θ as a vertical coordinate in the stratosphere

  7. Dropsondes from aircraft

  8. VOCALS field project

  9. Examples of potential temperature profiles from VOCALS Note general trend that height of the inversion increases as we move out to sea. This is due to mixing taking place at the interface of the inversion. Geraint will talk more about stability next lecture.

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