Carbon cycle and natural vegetation/Description: Difference between revisions
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===Model linkage and simulation procedure=== | ===Model linkage and simulation procedure=== | ||
Before the IMAGE-LPJml coupled simulation is started, vegetation and soil carbon pools need to be initialised. This is achieved by using LPJmL first in a 1000-year spin-up in order to initialise the natural ecosystems and their carbon pools and fluxes. This is followed by a 390-year spin-up, in which the agricultural land is gradually expanded based on historical [[HYDE database| HYDE land-use data]]. Timber product pool sizes of 1970 are based on literature estimates (Lauk et al., 2012). The coupled IMAGE-LPJmL simulations start in 1970 with observed climate, followed by simulated climate for the years from 2000 onwards ( | Before the IMAGE-LPJml coupled simulation is started, vegetation and soil carbon pools need to be initialised. This is achieved by using LPJmL first in a 1000-year spin-up in order to initialise the natural ecosystems and their carbon pools and fluxes. This is followed by a 390-year spin-up, in which the agricultural land is gradually expanded based on historical [[HYDE database| HYDE land-use data]]. Timber product pool sizes of 1970 are based on literature estimates ([[Lauk et al., 2012]]). The coupled IMAGE-LPJmL simulations start in 1970 with observed climate, followed by simulated climate for the years from 2000 onwards ([[Atmospheric composition and climate]]). As the interannual variability of weather conditions is needed for the simulation of vegetation dynamics in IMAGE-LPJmL, smooth annual climate trends from IMAGE [[Atmospheric composition and climate]] model are superimposed by interannual variability fields, extracted from observed climate over the 1971–2000 period. To avoid repeating climate trends within these 30-year periods, annual anomalies are ordered at random before superimposition. | ||
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Revision as of 11:45, 7 January 2014
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