Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Evaluating the performance of land surface model ORCHIDEE-CAN v1.0 on water and energy flux estimation with a single-and multi-layer energy budget scheme
Chen, Yiying ; Ryder, James ; Bastrikov, Vladislav ; McGrath, Matthew J. ; Naudts, Kim ; Otto, Juliane ; Ottlé, Catherine ; Peylin, Philippe ; Polcher, Jan ; Valade, Aude ; Black, Andrew ; Elbers, Jan A. ; Moors, Eddy ; Foken, Thomas ; Gorsel, Eva Van; Haverd, Vanessa ; Heinesch, Bernard ; Tiedemann, Frank ; Knohl, Alexander ; Launiainen, Samuli ; Loustau, Denis ; Ogeé, Jérôme ; Vessala, Timo ; Luyssaert, Sebastiaan - \ 2016
Geoscientific Model Development 9 (2016)9. - ISSN 1991-959X - p. 2951 - 2972.

Canopy structure is one of the most important vegetation characteristics for land-atmosphere interactions, as it determines the energy and scalar exchanges between the land surface and the overlying air mass. In this study we evaluated the performance of a newly developed multi-layer energy budget in the ORCHIDEE-CAN v1.0 land surface model (Organising Carbon and Hydrology In Dynamic Ecosystems-CANopy), which simulates canopy structure and can be coupled to an atmospheric model using an implicit coupling procedure. We aim to provide a set of acceptable parameter values for a range of forest types. Top-canopy and sub-canopy flux observations from eight sites were collected in order to conduct this evaluation. The sites crossed climate zones from temperate to boreal and the vegetation types included deciduous, evergreen broad-leaved and evergreen needle-leaved forest with a maximum leaf area index (LAI; all-sided) ranging from 3.5 to 7.0. The parametrization approach proposed in this study was based on three selected physical processes-namely the diffusion, advection, and turbulent mixing within the canopy. Short-term sub-canopy observations and long-term surface fluxes were used to calibrate the parameters in the sub-canopy radiation, turbulence, and resistance modules with an automatic tuning process. The multi-layer model was found to capture the dynamics of sub-canopy turbulence, temperature, and energy fluxes. The performance of the new multi-layer model was further compared against the existing single-layer model. Although the multi-layer model simulation results showed few or no improvements to both the nighttime energy balance and energy partitioning during winter compared with a single-layer model simulation, the increased model complexity does provide a more detailed description of the canopy micrometeorology of various forest types. The multi-layer model links to potential future environmental and ecological studies such as the assessment of in-canopy species vulnerability to climate change, the climate effects of disturbance intensities and frequencies, and the consequences of biogenic volatile organic compound (BVOC) emissions from the terrestrial ecosystem.

Multimodel estimate of the global terrestrial water balance: Setup and first results
Haddeland, I. ; Clark, D. ; Franssen, W.H.P. ; Ludwig, F. ; Voss, F. ; Arnell, N.W. ; Bertrand, N. ; Best, M. ; Folwell, S. ; Gerten, D. ; Gomes, S. ; Gosling, S. ; Hagemann, S. ; Hanasaki, N. ; Harding, R. ; Heinke, J. ; Kabat, P. ; Koirala, S. ; Oki, T. ; Polcher, J. ; Stacke, T. ; Viterbo, P. ; Weedon, G.P. ; Yeh, P. - \ 2011
Journal of Hydrometeorology 12 (2011)5. - ISSN 1525-755X - p. 869 - 884.
land-surface scheme - space-time climate - parameterization schemes - integrated model - project - simulation - resources - runoff - gcm - precipitation
Six land surface models and five global hydrological models participate in a model intercomparison project [Water Model Intercomparison Project (WaterMIP)], which for the first time compares simulation results of these different classes of models in a consistent way. In this paper, the simulation setup is described and aspects of the multimodel global terrestrial water balance are presented. All models were run at 0.5° spatial resolution for the global land areas for a 15-yr period (1985–99) using a newly developed global meteorological dataset. Simulated global terrestrial evapotranspiration, excluding Greenland and Antarctica, ranges from 415 to 586 mm yr-1 (from 60 000 to 85 000 km3 yr-1), and simulated runoff ranges from 290 to 457 mm yr-1 (from 42 000 to 66 000 km3 yr-1). Both the mean and median runoff fractions for the land surface models are lower than those of the global hydrological models, although the range is wider. Significant simulation differences between land surface and global hydrological models are found to be caused by the snow scheme employed. The physically based energy balance approach used by land surface models generally results in lower snow water equivalent values than the conceptual degree-day approach used by global hydrological models. Some differences in simulated runoff and evapotranspiration are explained by model parameterizations, although the processes included and parameterizations used are not distinct to either land surface models or global hydrological models. The results show that differences between models are a major source of uncertainty. Climate change impact studies thus need to use not only multiple climate models but also some other measure of uncertainty (e.g., multiple impact models).
Fluorescence explorer (FLEX): An optimised payload to map vegetation photosynthesis from space
Moreno, J.F. ; Asner, G.P. ; Bach, H. ; Belenguer, T. ; Bell, A. ; Buschmann, C. ; Calera, A. ; Calpe, J. ; Campbell, P. ; Cecchi, G. ; Colombo, R. ; Corp, L.A. ; Court, A. ; Cutter, M.A. ; Disney, M. ; Dudelzak, A. ; Urso, G. D'; Fernandes, R. ; Flexas, J. ; Gege, P. ; Gielen, B. ; Gitelson, A. ; Gloor, E.U. ; Gower, J. ; Green, R.O. ; Hill, J. ; Jacquemoud, S. ; Jia, L. ; Kneubühler, M. ; Laurila, T. ; Lewis, P. ; Lobb, D. ; Magnani, F. ; Maier, S.W. ; Martinez, A. ; Marek, M.V. ; Martinez Cobo, P. ; Mazzinghi, P. ; Menenti, M. ; Merton, R. ; Middleton, E. ; Miguel, E. De; Miller, J. ; Mohammed, G. ; Milton, E.J. ; Morales, F. ; Moya, I. ; Nedbal, L. ; Knorr, W. ; Ottle, C. ; Olioso, A. ; Pace, S. ; Palucci, A. ; Pedros, R. ; Peltoniemi, J. ; Penuelas, J. ; Plaza, A.J. ; Polcher, J. ; Rascher, U. ; Reuter, R. ; Rosema, A. ; Roujean, J.L. ; Saito, Y. ; Saugier, B. ; Schaepman, M.E. ; Serrano, J.B. ; Settle, J.J. ; Sierra, M. ; Sobrino, J. ; Stoll, M.P. ; Su, Z. ; Tobehn, C. ; Tremblay, N. ; Valcke, R. ; Verhoef, W. ; Veroustraete, F. ; Verstraete, M. ; Zarco Tejada, P. - \ 2006
In: Proceedings AIAA 57th International Astronautical Congress, 2 - 6 October, 2006, Valencia, Spain. - Valencia : AIAA - p. 2065 - 2074.
Achieving full data consolidation
Dirmeyer, P.A. ; Halldin, S. ; Hoff, H. ; Hutjes, R.W.A. ; Jenne, R. ; Kabat, P. ; Leese, J. ; Olson, R.J. ; Polcher, J. - \ 2004
In: Vegetation, water, humans and the climate; a new perspective on an interactive system / Kabat, P., Claussen, M., Dirmeyer, P.A., Gash, J.H.C., Bravo de Guenni, L., Meybeck, M., Pielke sr., R.A., Vörösmarty, C.J., Hutjes, R.W.A., Lütkemeier, S., Berlin (Germany) [etc.] : Springer (IGBP Series ) - ISBN 3540424008 - p. 267 - 271.
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