Weathering computer simulation

Note If you don t have a computer handy, imagine a bunch of marbles bouncing around inside a container and following the rules I ve described. Ball bearings in a closed petri dish also work well. If you re doing this with a classroom full of kids, you can have the kids pretend to be molecules in an enclosure. I describe such an activity in the Stop Faking It books Energy and Air, Water, and Weather. Of course, the best way to visualize a gas is with the computer simulation, so do your best to use that. 

Computer simulation of the weathering processes involving reducing environments. 

Gourmelon C., Nichard G., and Boulegue J., Netastable equilibria in sulfide rich waters. Application to a computer simulation of the weathering of pyrite rich sandstones and sulfide ore formation, p. 56-65, in "Proceedings of 2nd Intern. Symp. on Water-Rock Interaction , vol. 4, Sciences Geologiques, Uni-versite de Strasbourg, 1977. 

Figure 22 A IDREACT computer simulation of (a) residual primary silicate distributions and secondary porosity and (b) secondary mineral distributions with depth for Los Pijiguaos bauxite deposit, Venezuela after 2 Ma years of weathering (after Soler and Lasaga, 1998).

Figure 2. Computer printout of connected data points from a spilled No. 4 fuel oil and a suspect. It also shows the computer-simulated weathering data for the suspect as a near overlay for the spill.

Ross JW, Miller WA, Weatherly GC (1981) Dynamic computer-simulation of viscous-flow sintering kinetics. J Appl Phys 52 3884—3888... 

Bain and Griffen (2002) studied three Scottish soil profdes adjacent to each other and developed on similar schistose parent material but imder different land use. The profile imder 50-year old Sitka spruce trees was the most acidic the second profile under rough grassland was less acidic and the third profile in an arable field which had been fertilized was the least acidic. The clay fractions of all three profiles are similar. However, computer simulations of the X-ray diffraction patterns of the clay phases using a modified version of NEWMOD revealed two possible weathering trends ... 

Kuhl, F., Weatherly, R., Dahmann, J. (1999). Creating Computer Simulation Systems An Introduction to the High Level Architecture Prentice Hall PTR. 

FY Hunt, MA Galler, JW Martin. Microstructure of weathered paint and its relation to gloss loss Computer simulation and modeling. J Coatings Technology 70(880) ... 

Computer simulations with an interactive chemistry GCM have been performed at T63 resolution (1.8° latitude and longitude). The chemistry GCM has been described by G.J. Roelofs and J. Lelieveld [Tellus 49B, 38 (1997)] and E. Roecknta- et aL [Journal of Climate, 12 3004 (1997)]. To represent actual meteorology, we assim-ilated analyses from the European Centre for Medium-Range Weather Forecasts (ECMWF), as described by A,T.J. de Laat et al. (35). The T63 resolution model version has been evaluated by A,S. Kentarchos, G.J. Roelofs, and J. Lelieveld Journal of the Atmospheric Sciences, SI 2824 (2000)]. The chemistry scheme includes a representation of higher hydrocarbons as described by G.J. Roelofs and J. Lelieveld Journal of Geophysical Research, 105 22697 (2000)]. 

The MM5 model will eventually need to be replaced by the new-generation Weather Research and Forecasting (WRF) model (e.g., Klemp 2004) to provide meteorological data inputs to HPAC. WRF has many improved features over MM5 and will enhance our ability to generate more timely and accurate near-surface flow for dispersion computation in an urban setting. Also, we would like to evaluate the impact of ACARS data on WRF/HPAC simulations. An interesting experiment would be to assimilate both WTM and ACARS data simultaneously into the WRF model. 

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