The term '''box model''' ismay usedrefer into: ▼{{otheruses4|the modelling of complex systems|the 3D modelling system|box modeling{{!}}box modelling|problems with the implementation of [[Cascading Style Sheets]] in older versions of the [[Internet Explorer]] web browser|Internet Explorer box model bug}}
*[[Box modeling]], in computer graphics
▲The term '''box model''' is used in:
*[[Climate box models]], in Earth sciences
*[[Computer graphics]] - see [[box modeling]]
*[[Gravity current#Box models|Gravity current box models]], in fluid mechanics
*[[Cascading style sheets]] (CSS)
*[[CSS box model]] in web development
*[[Climatology]]
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'''Box models''' are simplified versions of complex systems, reducing them to boxes (or [[reservoir]]s) linked by fluxes. The boxes are assumed to be mixed homogeneously. Within a given box, the concentration of a ''species'' (e.g. a solute) is therefore uniform. However, the abundance of a species within a given box may vary as a function of time due to the input to (or loss from) the box or due to the production, consumption or decay of this species within the box.
==See also==
Simple box models, i.e. box model with a small number of boxes whose properties (e.g. their volume) do not change with time, are often useful to derive analytical formulas describing the dynamics and steady-state abundance of a species. More complex box models are usually solved using numerical techniques.
*[[Internet Explorer box model bug]], in the implementation of the CSS box model
{{disambig}}
Box models are used extensively to model environmental systems or ecosystems and in studies of [[ocean circulation]] and the [[carbon cycle]].<ref name=Sarmiento1984>{{cite journal
| author = Sarmiento, J.L.
| coauthors = Toggweiler, J.R.
| year = 1984
| title = A new model for the role of the oceans in determining atmospheric P CO 2
| journal = Nature
| volume = 308
| pages = 621–624
| doi = 10.1038/308621a0
| url = http://www.nature.com/nature/journal/v308/n5960/abs/308621a0.html
| accessdate = 2007-06-06
}}</ref>
==References==
{{reflist|1}}
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