Cassandra has moved. Ugo Bardi publishes now on a new site called "The Seneca Effect."

Wednesday, March 13, 2013

The World is a Fountain


The world is complex, variegated, convoluted, multi-faceted, interconnected, complicated, circuitous, and more. And, yet, there is a logic in the way it works.

Look at the Trevi Fountain, in Rome, it is complex and variegated, but in the end there is a logic: water always goes down. It is physics: it is the gravitational potential that makes water move.

The same is true for the whole world. Lot's of things are going on, but there is a logic: energy goes down, it degrades, it is a chemical potential driven by the second law of thermodynamics.

So, no matter how complicated the Trevi Fountain is, water always goes down. No matter how complicated is the world, chemical potentials always "go down."

This is the idea at the basis of the paper that I published in "Sustainability", titled "Mind-Sized World Models." as part of a special issue dedicated to the 40th anniversary of "The Limits to Growth"

The term "mind-sized" comes from the ideas of Seymour Papert, who said that models should be simple enough to be understandable, if one has to act on them. On the basis of this idea, I tried to put together simple, "mind-sized", models which can still tell us something of the way the world works. World Models, in short.

So, I build these models as if they were multi-level fountains, one basin, two basins, three basins, and more.




Each basin represents a stock of energy, which is dissipated in steps, going from top to bottom (in energy terms). It is a concept that I already described in a post of mine titled "Entropy, Peak Oil, and Stoic Phylosophy" but that now I examined more in depth.

Now, imagine a multi-level fountain; imagine that it is dry at start. Then put some water in the top basin. It will go down, step by step, until it reach the bottom basin, and then disappear falling on the ground. It is, in the end, what we have been doing with fossil fuels; burning them until they disappear as they become atmospheric pollution.

Here is the model for the "three-level" fountain. It is the one that gives rise to the "Seneca Effect" (When things go wrong, they go wrong fast)


This is the model that originates the "Seneca Cliff" that we may also call "collapse" and that we may experience at some moment in the future.



My paper in "Sustainability" is "open access". Here is the link


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Note: there is a tendency, recently, to say that all "free access" journals are hoaxes and that all you have to do to see your paper published in one of them is to pay some money. It may be for some journals, but surely not for all of them. About  "Sustainability", I can testify that submissions go through a very serious review and that it is not easy at all to publish in it. Try and see by yourself. 

Here are some thoughts of mine on "open access" science.

  


Who

Ugo Bardi is a member of the Club of Rome, faculty member of the University of Florence, and the author of "Extracted" (Chelsea Green 2014), "The Seneca Effect" (Springer 2017), and Before the Collapse (Springer 2019)