Methane Fluxes Between Terrestrial Ecosystems and the

0,92

MB

Atmosphere at Northern High Latitudes During the Past

35

stron

Century: A retrospective analysis with a process-based

biogeochemistry model

4722

ID

Massachusetts Institute of Technology

2004

rok

Contents

1. Introduction . 2

2. Methods . 3

2.1 Model Framework 3

2.1.1 Methane Module . 3

2.1.2 Soil Thermal Module 6

2.1.3 Hydrologic Module. 6

2.1.4 Carbon/Nitrogen Dynamics Module 7

2.2 Methane Module Parameterization . 9

2.3 Model Testing at the Site Level. 9

2.4 Regional Simulations Using Geographically Explicit Data . 10

3. Results and Discussion 11

3.1 Site-Specific Testing 11

3.2 Contemporary Regional and Sub-Regional Fluxes 11

3.3 Twentieth Century Trends . 15

3.4 Conclusions and Future Directions . 16

4. References . 18

Appendix A. Methane production . 23

Appendix B. Methane oxidation 24

Appendix C. Methane transport. 26

Appendix D. Updated Hydrologic Module. 27