Modeling of the net ecosystem exchange, gross primary production, and ecosystem respiration for peatland ecosystems of Western Siberia

[摘要] Observed and simulated carbon dioxide fluxes in oligotrophic peatlands of Western Siberia are discussed. Net ecosystem exchange, gross primary production, and ecosystem respiration are measured at a ridge-hollow complex in the South Taiga zone (Bakchar bog - field station "Vasjuganie") and Middle Taiga zone (Mukhrino bog - field station "Mukhrino"). A model of net ecosystem exchange is used to study the influence of different environmental factors and to calculate daily the growing season carbon budget for an oligotrophic bog. The model uses the air and soil temperature, the incoming photosynthetically active radiation, and the leaf area index as the explanatory factors for gross primary production, heterotrophic and autotrophic respiration. The model coefficients are calibrated using data collected by an automated soil CO2 flux system with a clear long-term chamber. The studied ecosystems are sinks of carbon according to modelling and observation results.

[发布机构] Institute of Monitoring of Climatic and Ecological System, Siberian Branch of Russian Academy of Sciences, Akademicheskii 10/3, Tomsk, Russia^1;Yugra State University, Chekhov st. 16, Khanty-Mansiysk, Russia^2

[效力级别] 计算机科学

[关键词] Autotrophic respiration;Carbon dioxide flux;Ecosystem respiration;Environmental factors;Gross primary production;Net ecosystem exchange;Peatland ecosystems;Photosynthetically active radiation