Abstract
Abstract Despite the importance of peatlands in the global carbon cycle, no widely applicable ecosystem model exists for peatlands. Simulations of three montane fens in Colorado, USA were conducted to test the capabilities of the CENTURY ecosystem model to simulate 1) long-term carbon accumulation and 2) short-term changes in carbon accumulation due to hydrologic changes. The CENTURY model was calibrated to simulate long-term carbon accumulation in two fens for up to 10,000 years by adjusting three variables that represent anaerobic soil conditions. CENTURY was unable to simulate long-term carbon accumulation in a third fen using settings for the two calibrated fens. However, CENTURY correctly simulated total carbon storage by adjusting two of the three anaerobic variables. A sensitivity analysis revealed that carbon accumulation in CENTURY is highly sensitive to anaerobic soil conditions. CENTURY predicted that half of the fen peat is composed of structural root material. The majority of the remaining pe...
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