TITLE:
The effect of the feedback cycle between the soil organic carbon and the soil hydrologic and thermal dynamics
AUTHORS:
Kensuke Mori, Takeshi Ise, Miyuki Kondo, Yongwon Kim, Hiroyuki Enomoto
KEYWORDS:
Soil Organic Carbon; High-Latitude Soil; Soil Hydrology; Soil Thermal Regime; Land Surface Model; Organic Carbon Decomposition Model; Feedback Cycle
JOURNAL NAME:
Open Journal of Ecology,
Vol.2 No.2,
May
30,
2012
ABSTRACT: Biogeochemical feedback processes between soil organic carbon (SOC) in high-latitude organic soils and climate change is of great concern for projecting future climate. More accurate models of the SOC stock and its dynamics in organic soil are of increasing importance. As a first step toward creating a soil model that accurately represents SOC dynamics, we have created the Physical and Biogeochemical Soil Dynamics Model (PB-SDM) that couples a land surface model with a SOC dynamics model to simulate the feedback cycle of SOC accumulation and thermal hydrological dynamics of high-latitude soils. The model successfully simulated soil temperatures for observed data from a boreal forest near Fairbanks, and 2000 year simulations indicated that the effect of the feedback cycle of SOC accumulation on soil thickness would result in a significant differences in the amount of SOC.