Joint assembly AGU-GAC-MAC-CGU
Year of publication:
The impact of interactive phenology on the land surface state, particularly on albedo and on the partitioning of surface fluxes, is assessed first by comparing two simulations of the Canadian Land Surface Scheme (CLASS) - one with interactive phenology (through the dynamic vegetation model CTEM) and the other with prescribed phenology, driven by ECMWF reanalysis data (ERA40 and ERA-Interim) for the 1971-2012 period. A deep soil configuration is used in order to quantify the impacts of interactive phenology on permafrost in terms of extent and active layer thickness. Soil organic matter is included to improve the representation of the thermal and hydraulic properties of soil. The performance of the model is assessed by comparing simulated fields, such as leaf area index, primary productivity and vegetation height, to observation-based datasets. The simulated variables show a high degree of correlation with their observation-based counterparts in both location and magnitude in the simulations with interactive phenology. The differences in the representation of interannual variability are analyzed in order to quantify the added value of interactive phenology. Some preliminary results from two Canadian Regional Climate Model simulations, with and without interactive phenology, will also be presented and the impacts on regional climate discussed.