Modelling the role of fires in the terrestrial carbon balance by incorporating SPITFIRE into the global vegetation model ORCHIDEE – Part 1: simulating historical global burned area and fire regimes
Summary: ORCHIDEE-SPITFIRE model could moderately capture the decadal trend and variation of burned area during the 20th century, and the spatial and temporal patterns of contemporary vegetation fires. The model has a better performance in simulating fires for regions dominated by climate-driven fires, such as boreal forests. However, it has limited capability to reproduce the infrequent but important large fires in different ecosystems, where urgent model improvement is needed in the future.
C. Yue, P. Ciais, P. Cadule, K. Thonicke, S. Archibald, B. Poulter, W. M. Hao, S. Hantson, F. Mouillot, P. Friedlingstein, F. Maignan, and N. Viovy Geosci. Model Dev., 7, 2747-2767, 2014 AbstractFinal Revised Paper (PDF, 10114 KB)Supplement (2024 KB)Discussion Paper (GMDD)
21 Nov 2014
SEHR-ECHO v1.0: a Spatially Explicit Hydrologic Response model for ecohydrologic applications
Summary: This paper presents the Spatially Explicit Hydrologic Response of the Laboratory of Ecohydrology of the Ecole Polytechnique Fédérale de Lausanne for hydrologic simulation at the catchment scale. It simulates the mobilization of water at the subcatchment scale and the transport to the outlet through a convolution with the river network. We discuss the parameter estimation and model performance for discharge simulation in the high Alpine Dischmabach catchment (Switzerland).
Verification of a non-hydrostatic dynamical core using the horizontal spectral element method and vertical finite difference method: 2-D aspects
Summary: The non-hydrostatic compressible Euler equations were solved in a two-dimensional slice framework employing a spectral element method for the horizontal discretization and a finite difference method for the vertical. The results from the tests demonstrate that the horizontally spectral element vertically finite difference model is accurate and robust provided sufficient diffusion is applied. The combined spatial discretization method offers a viable method for development of a NH dynamical core.
Response of microbial decomposition to spin-up explains CMIP5 soil carbon range until 2100
Summary: Pre-industrial soil organic carbon (SOC) stocks vary 6-fold in models used in the 5th IPCC Assessment Report. This paper shows that this range is largely determined by model-specific responses of microbal decomposition during the equilibration procedure. As SOC stocks are maintained through the present and to 2100 almost unchanged, we propose that current SOC observations could be used to constrain this equilibration procedure and thereby reduce the uncertainty in climate change projections.
Applicability of an integrated plume rise model for the dispersion from wild-land fires
J. Kukkonen, J. Nikmo, M. Sofiev, K. Riikonen, T. Petäjä, A. Virkkula, J. Levula, S. Schobesberger, and D. M. Webber Geosci. Model Dev., 7, 2663-2681, 2014 AbstractFinal Revised Paper (PDF, 2654 KB)Discussion Paper (GMDD)
13 Nov 2014
The photolysis module JVAL-14, compatible with the MESSy standard, and the JVal PreProcessor (JVPP)
Model–data fusion across ecosystems: from multisite optimizations to global simulations
Summary: A consistent calibration of an advanced land surface model was performed by grouping in situ information on land-atmosphere exchanges of carbon and water using broad ecosystem and climate classes. Signatures of improved carbon cycle simulations were found across spatial and temporal scales, along with insights into current model limitations. These results hold promising perspectives within the ongoing efforts towards building robust model-data fusion frameworks for earth system models.