A basic modelling primer. 69EG3137 – Impacts & Models of Climate Change. Details for Today: DATE: 14 th October 2004 BY: Mark Cresswell FOLLOWED BY: Practical. Lecture Topics. Introduction (what is a model?) Modelling philosophy The systems approach to modelling Systems analysis
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69EG3137 – Impacts & Models of Climate Change
Details for Today:
DATE: 14th October 2004
BY: Mark Cresswell
FOLLOWED BY: Practical
What is a Model?
What is a Model?
What is Modelling?
There are three broad categories of model as outlined by Hardisty, 1995:
Example of a very basic model
When modelling a dynamic process (like the climate) we are concerned with the following paradigm:
Future value (or state) = present value + change
We may also consider the following re-arrangement:
Change = future value – present value
The MOST important principle of modelling
garbage in = garbage out
Fundamental equations solved in GCMs
1. Conservation of momentum
2. Conservation of mass
3. Conservation of energy
4. Ideal gas law
Hardisty J, Taylor DM and Metcalfe SE (1995). Computerised environmental modelling: A practical
introduction using Excel. Published by John Wiley & Sons, England.
Berry J and Houston K. (1995). Mathematical modelling. Published by Edward Arnold, London
Giordano F, Weir M and Fox W. (1997). A first course in mathematical modeling. Published by
Brooks and Cole, California.
Deaton M and Winebrake J. (1999). Dynamic modelling of environmental systems. Published by
Springer Verlag, New York
Climate change is influenced by complex interlinked processes. This interactive model lets you explore the system and how we can change it, simply by moving controls with your mouse and observing the effect instantly on plots ranging from emissions to impacts. The calculation methods are based on those used in the recent Intergovernmental Panel on Climate Change Third Assessment Report, implemented efficiently in the java language to work within your web browser.
The model can be accessed from the J:\ drive: J:\EG3137\JCM\Index.html
Some additional resources relating to climate change in Africa can be found at: