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A Radiation Course based upon Numerical Methods Björn-Martin Sinnhuber & Stefan Bühler

A Radiation Course based upon Numerical Methods Björn-Martin Sinnhuber & Stefan Bühler University of Bremen Summer semester 2005. Contact. Björn-Martin Sinnhuber bms@iup.physik.uni-bremen.de NW1 - W3190 Stefan Bühler sbuehler@uni-bremen.de NW1 - N3371. Aim and Scope of the Course.

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A Radiation Course based upon Numerical Methods Björn-Martin Sinnhuber & Stefan Bühler

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  1. A Radiation Course based upon Numerical Methods Björn-Martin Sinnhuber & Stefan Bühler University of Bremen Summer semester 2005

  2. Contact Björn-Martin Sinnhuber bms@iup.physik.uni-bremen.de NW1 - W3190 Stefan Bühler sbuehler@uni-bremen.de NW1 - N3371

  3. Aim and Scope of the Course The aim of the course is to: • understand the processes and • learn how to calculate the transfer of radiation in the atmosphere. Main applications of atmospheric radiative transfer are: • Impact of radiation on climate • Atmospheric remote sensing

  4. Organisation of the Course The course will consist of: • About 7 introductory lectures • About 7 practical exercises at the computers For the Diploma students: Kriterium um einen Schein über„erfolgreiche Teilnahme“ zu bekommen: • Aktive Teilnahme an den praktischen Übungen(höchstens zweimal fehlen)

  5. Outline of the Next Few Weeks • Introduction • Radiative Transfer, Part 1 • Spectroscopy • Radiative Transfer, Part 2

  6. Introduction • What are numerical methods? • Why use numerical methods? • How does this look like in practise?

  7. SZA = 87.0°

  8. SZA = 89.5°

  9. 1.0 Blackbody Radiation

  10. 1.1 Planetary Equilibrium Temperature • Heating by absorption of (shortwave) solar radiation • Cooling by emission of (longwave) terrestrial radiation

  11. 1.1 Planetary Equilibrium Temperature • Incoming solar radiation needs to be balanced by outgoing terrestrial radiation. • Solar constant at top of Earth‘s atmosphere:1376 W m-2 • Outgoing longwave radiation:

  12. 1.2 A Simple Model of the Greenhouse Effect Assumptions: • Single layer atmosphere with constant temperature • Atmosphere is transparent for shortwave solar radiation • Atmosphere is a blackbody for longwave radiation

  13. 1.3 Outgoing Longwave Radiation

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