1. Methane Emission to the Atmosphere Bazhin N.M. Institute of Chemical Kinetics and Combustion Novosibirsk RUSSIA

2. Methane in Atmosphere – Concentration 1.8 ppm Content in Atmosphere 5000 Tg (1 Tg = 10 12 g = 1 mln of tons) Flux 500 Tg /year

3. Methane concentration dependence on time

5. Methane concentration and world population

6. Methane sources Emission from Swamps, Rice fields, Lakes and Oceans - 44%

8. Active layer

9. Bubbles formation in rice field model

10. Methane concentrations

12. Upper border of bubbles position Dimensionless unit of depth

13. Artificial atmospheres: nitrogen - oxygen Kuzmin et all, Limnology and Oceanology

14. If W 1 (z) = W 10 then Transport in region I Border conditions N2N2

15. Transport in region II Main idea: - sink to the bubbles - molar part in the bubbles

16. Border conditions

17. Exponential approximation to W(z) W 1 (z) = W 10 exp(-νz)

18. CH 4 and N 2 concentrations on depth, W 1 (z) = W 10 exp(-νz)

19. Bubbles composition on depth

20. on X1BX1B

21. Active layer

23. Methane concentration on depth