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Sensitivity Of Different Evapotranspiration Calculation Methods In Different Crop-Weather Models, J. Eitzinger, D. Marinkovic, J. Hosch
Sensitivity Of Different Evapotranspiration Calculation Methods In Different Crop-Weather Models, J. Eitzinger, D. Marinkovic, J. Hosch
International Congress on Environmental Modelling and Software
The calculation of evapotranspiration and its components transpiration and evapotranspiration is of crucial importance in dynamic crop-weather models, irrigation models and SVAT models. Although many approaches were developed and adapted for various applications and based on available input data, there is still a remarkable range of uncertainty related for a representative calculation. However, many of the problems are based on weak quality of model input data, but others are related to the method itself and its sensitivity to various environmental conditions. In our study, several methods of evapotranspiration estimation in different crop weather models are compared and tested against data …
Sensitivity Of The Inca Model To N Process Parameters And Hydrological Input, Katri Rankinen, A. Lepistö, Kirsti Granlund
Sensitivity Of The Inca Model To N Process Parameters And Hydrological Input, Katri Rankinen, A. Lepistö, Kirsti Granlund
International Congress on Environmental Modelling and Software
The Integrated Nitrogen in CAtchments (INCA) model simulates nitrogen transport and processes within catchments. It was applied to the Simojoki river basin in northern Finland where major human impacts are forest management and atmospheric nitrogen deposition. In this work the main emphasis is to evaluate the sensitivity of the INCA model to hydrological input. Parameters defining vegetation nitrogen uptake and denitrification rate were also studied. A simple univariate parametric (one-at-a-time) sensitivity analysis was conducted for NO3-N leaching, NH4-N leaching and denitrification in forest cut areas. Mineral nitrogen leaching was mainly influenced by hydrologically effective rainfall (HER). The parameter that controls …
Sensitivity Testing Of A Biophysical Toolbox For Exploring Water Resources Utilisation And Management Options, Wendy S. Merritt, B. G. W. Croke, A. J. Jakeman
Sensitivity Testing Of A Biophysical Toolbox For Exploring Water Resources Utilisation And Management Options, Wendy S. Merritt, B. G. W. Croke, A. J. Jakeman
International Congress on Environmental Modelling and Software
This paper investigates the sensitivities of model outputs to model parameter values within a Biophysical Toolbox developed as part of a Decision Support System (DSS) for integrated catchment assessment and management of land and water resources in the highland regions of northern Thailand. The toolbox contains a hydrological module based upon the IHACRES rainfall-runoff model, a crop model (CATCHCROP), and an erosion model (USLE) modified to suit conditions in northern Thailand. Emphasis in the development of the individual models within the Biophysical Toolbox was placed upon limiting model complexity. Limited data availability commonly restricts the complexity of the model structure …
Emissions Corridors Preserving The Atlantic Ocean Thermohaline Circulation, K. Zickfeld, T. Bruckner
Emissions Corridors Preserving The Atlantic Ocean Thermohaline Circulation, K. Zickfeld, T. Bruckner
International Congress on Environmental Modelling and Software
The Atlantic thermohaline circulation (THC) transports large amounts of heat northward, acting as a heatingsystem for the northern North Atlantic and north-western Europe. Paleo-reconstructions and a large numberof model simulations have shown the THC to be stable only within certain limits beyond which the circulationshuts down. In this paper we derive emission corridors for the 21st century preserving the Atlanticthermohaline circulation. To this end a multi-gas reduced-form climate model has been coupled to a dynamicfour-box model of the Atlantic thermohaline circulation. Both models allow for the relevant uncertainties (i.e.,climate and hydrological sensitivity) to be taken into account. The emission corridors …
Global And Annex I Emissions Corridors For The 21st Century, E. Kriegler, T. Bruckner
Global And Annex I Emissions Corridors For The 21st Century, E. Kriegler, T. Bruckner
International Congress on Environmental Modelling and Software
We analyze global and Annex I emissions corridors for the 21st century. Emissions corridors represent the range of admissible emissions futures which observe some predefined constraints. They are calculated on the conceptual and methodological basis of the tolerable windows approach. We assess the sensitivity of the corridors to limits on the non-intolerable magnitude of climate change, the acceptable rate of emissions reductions and the feasible transition pace towards a decarbonizing economy. In addition we consider the influence of climate sensitivity on the corridors. While we calculate the global emissions corridors for the idealized assumption of a single global emitter, the …
Environmental Foresight And Structural Change, M. B. Beck
Environmental Foresight And Structural Change, M. B. Beck
International Congress on Environmental Modelling and Software
Policy-makers and the public, it has famously been said [Brooks, 1986], are more interested in the possibility of non-linear dislocations and surprises in the behavior of the environment than in smooth extrapolations of current trends. How indeed should we design our models to generate environmental foresight, to detect, in particular, threats to our environment lying “just beyond the horizon”? In facing this prospect of potentially profound dislocations in behavior, the problem is that the number of state variables in the model, whether they interact, how they interact, and the form of their interactions, may be evolving over time. What may …