|
ACSYS Final Science Conference: Book of Abstracts
| P r e s e n t a t i o n M e t a d a t a |
|---|
| Title | Russian Arctic and Siberia natural methane fluxes diagnosis and modelling |
| First Author | Lagun, Victor
Organization: Arctic and Antarctic Research Institute
Country: Russia
E-Mail: lagun@aari.nw.ru |
| Co-Author | Iagovkina, Svetlana
Karol, Igor
Paramonova, Nina |
| Session | 3- Process Studies and Modelling |
| Abstract | Atmospheric methane plays an important role in the global greenhouse effect. Net methane emission can be accelerated by atmospheric warming processes. The Russian Arctic and Siberian region are among the most intensive sources of natural methane. Natural sources in Arctic and sub-Arctic areas are very large, especially wetlands, tundra, permafrost, lakes, river deltas, coastal bogs, fens, and boreal marshes. Since direct measurements are rare, inhomogeneously distributed in space and as a rule describe a small area, it seems reasonable to use the empirical relationships between local measurements of high precision and some external parameters of the surroundings. Numerical estimations of the spatial distribution of natural methane fluxes from Greatest Siberian wetland massif were executed using available multiyear field experimental results based on hydrometeorological, ecological, hydrogeological and geobotanic measurements and their statistical relationships. Using the local statistical dependence between methane flux values and wetland environment parameters it is possible to estimate the spatial distribution of CH4 fluxes with high resolution. A specially developed 3D regional atmospheric transport model based on calculated methane fluxes describes adequately the tropospheric methane distribution. The results of the 3-D regional model are verified by direct measurements of methane concentrations and calculated on the basis of empirical relationships with the methane flux field in West Siberian region. Integral input of summer surface methane flux from Arctic and sub-Arctic area wetlands to the global methane budget is estimated. Summer natural methane emissions from the northern part of West Siberia are estimated as 10.5 Mt CH4/year. Original results of direct methane concentration measurements over the Arctic Seas and North Pole area are presented. |
| Type | Poster 117 |
| Download | Not Available |
|
|
