1. Ge103 Lecture May 10 2005 Yuk Yung x6940; yly@gps.caltech.edu
Trace Gases
Ge103 Lecture May
Yuk Yung
x6940;

8. Dictionary Atmosphere = 1. 82x1020 moles = 5
Dictionary Atmosphere = 1.82x1020 moles = 5.27x1018 Kg 1 Tg yr-1 = 109 kg yr-1 = 3.4 x1010 moles yr-1 M = 29

18. Caltech/JPL 2-D model of the atmosphere
January, 60˚ to 70˚ north
CH4
Current H2
Model
elevated H2
Data shown as * and + are SOLVE balloon measurements for H2 and CH4, respectively

19. Variations in H2 concentration with time and location

20. Familiar natural sources of H2
Fires
Volcanoes
Beasts
Rocks

21. The global atmospheric H2 budget based on
concentration records and inventory estimates

22. Stratospheric water vapor predicted for
2 ppm tropospheric H2
% increase over current
Solid lines contour ppmv H2O vapor