Modelling Peatland Land Surface Processes, Vegetation Dynamics and Methane Emissions for Lena River Delta Region

摘要

In the result of project work we have carried out the working plan. We provided detail analysis of LPJ-Why-Me scheme. We looked the scheme of LPJ-Why-Me can be apply inconsistently, so it's necessary take account of error of simulations. We have tested and validate LPJ-Why-Me for the Lena River Delta Region. For it we have used available observations from Russian-German research at the Lena River Delta Region as well as ESA DUE PERMAFROST project has provided us the remote sensing data. We used for the calculations and comparisons the Planet Simulator (Model of Intermediate Complexity from University of Hamburg and Max-Plank Institute for Meteorology) suitable for climate and paleo-climate simulations and time scales up to ten thousand years or more. It was used in couple with LPJ-Why-Me for examining the changes seen in land surface processes of the Lena River Delta Region based on the IPCC SRES B1 and A2 emission scenarios. The LPJ-Why-Me calculations showed permafrost temperature, water table position and net primary production will increase by the end of 21st century. We were estimated contribution of methane emissions from the Lena River Delta ecosystems to global methane budget and variability of the positive feedback of the climate system. The calculations showed methane emissions from the Lena River Delta are not significant for global climate warming.