An empirical model of carbon fluxes in Russian tundra

• DOI: 10.1046/j.1365-2486.2001.00380.x
• Publication Date: 2003-03-11T21:36:27Z
• Authors: Dmitri G. Zamolod...; Dmitri V. Karelin
• Keywords: Biome

Summary This study presents an empirical model based on a GIS approach, which was constructed to estimate the large‐scale carbon fluxes over entire Russian tundra zone. The has four main blocks: (i) computer map of landscapes; (ii) data base long‐term weather records; (iii) submodel phytomass seasonal dynamics; and (iv) fluxes. uses exclusively original in situ diurnal CO 2 flux chamber measurements (423 sample plots) conducted during six field seasons (1993–98). research sites represent biome landscapes (arctic, typical, south shrub mountain tundras) latitudinal diapason 65–74°N longitudinal profile 63°E−172°W. greatest possible diversity major ecosystem types within different investigated. majority used obtained from same plots. two dependent [GPP, Gross Respiration (GR)] several input variables (air temperature, PAR, aboveground components). demonstrates good correspondence with other independent regional estimates patterns. annual GPP zone for area 235 × 10 6 ha estimated as −485.8 ± 34.6 tC, GR +474.2 35.0 NF −11.6 40.8 possibly corresponds equilibrium state balance climatic period studied (the first half 20th century). results advocate that simple regression‐based models are useful extrapolating small large spatial scales.