Download Simulating Nature: A Philosophical Study of by Arthur C. Petersen PDF

By Arthur C. Petersen

Computer simulation has develop into a big ability for acquiring wisdom approximately nature. The perform of clinical simulation and the common use of doubtful simulation leads to public coverage elevate quite a lot of philosophical questions. such a lot prominently highlighted is the sector of anthropogenic weather change—are people presently altering the weather?

Referring to empirical effects from technological know-how experiences and political technological know-how, Simulating Nature: A Philosophical research of Computer-Simulation Uncertainties and Their position in weather technology and coverage suggestion, moment Edition addresses questions about the kinds of uncertainty linked to medical simulation and approximately how those uncertainties should be communicated.

The writer, who participated within the United countries’ Intergovernmental Panel on weather swap (IPCC) plenaries in 2001 and 2007, discusses the review reviews and workings of the IPCC. This moment variation displays the most recent advancements in weather switch coverage, together with an intensive replace and rewriting of sections that confer with the IPCC.

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Extra info for Simulating Nature: A Philosophical Study of Computer-Simulation Uncertainties and Their Role in Climate Science and Policy Advice, Second Edition

Example text

Let us look at the issue of the reproducibility of simulation in somewhat more detail. Hans Radder distinguishes three types of reproducibility of experiment. Here, I generalise his notion of reproducibility to the reproducibility of simulation. * The three types of reproducibility of simulation that I distinguish are (1) reproducibility of model runs with the same technical model implementation; (2) reproducibility of the simulation under the same theoretical interpretation (conceptual and mathematical model and result), possibly with another technical model implementation; and (3) reproducibility of the result with a different simulation (different conceptual, mathematical, and technical models) or with an experiment, also called ‘replicability’.

36 Simulating Nature understanding of the processes they are studying. 2, for instance, one can see the updraughts and downdraughts and their horizontal shapes in the middle of the boundary layer. Pictures of their vertical shapes and 3-D animations also facilitate an intuitive understanding of the behaviour of these plumes. Karim Benammar (1993: 80) writes about the role of visualisation in simulation practices: Images are vital for understanding spatial relations between numbers and for discerning patterns that involve more than two numbers.

Thus the turbulence processes cannot be resolved in the large-scale air pollution models. My solution was to propose an ‘updraught–downdraught model’ or ‘mass-flux model’ (Petersen et al. 1999) as a parameterisation that could be included—in the simplified form of Petersen and Holtslag (1999)—in the large-scale models. 1. All the air that moves up through turbulent processes within a grid cell of a large-scale model is conceptually lumped together in one ‘updraught’ and vice versa the air that moves down is lumped together in one ‘downdraught’.

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