Thermodynamics Of Natural Systems

Fully updated, this streamlined new textbook is an accessible introduction to thermodynamics for Earth and environmental scientists, emphasising real-world problems.

Thermodynamics deals with energy levels and the transfer of energy between states of matter, and is therefore fundamental to all branches of science. This edition provides a relatively advanced treatment of the subject, specifically tailored for the interests of the Earth sciences. The first four chapters explain all necessary concepts, using a simple graphical approach. Throughout the rest of the book the author emphasizes the use of thermodynamics to construct mathematical simulations of real systems. This helps to make the many abstract concepts acceptable. Many computer programs are mentioned and used throughout the text, especially SUPCRT92, a widely used source of thermodynamic data. An associated website includes links to useful information sites and computer programs and problem sets. Building on the more elementary material in the first edition, this textbook will be ideal for advanced undergraduate and graduate students in geology, geochemistry, geophysics and environmental science.

Thermodynamics deals with energy levels and energy transfers between states of matter, and is therefore fundamental to all branches of science. This new edition provides an accessible introduction to the subject, specifically tailored to the interests of Earth and environmental science students. Beginning at an elementary level, the first four chapters explain all necessary concepts via a simple graphical approach. Throughout the rest of the book, the author emphasizes the importance of field observations and demonstrates that, despite being derived from idealized circumstances, thermodynamics is crucial to understanding ore formation, acid mine drainage, and other real-world geochemical and geophysical problems. Exercises now follow each chapter, with answers provided at the end of the book. An associated website includes extra chapters and password-protected answers to additional problems. This textbook is ideal for undergraduate and graduate students studying geochemistry and environmental science.

The book presents a consistent and complete ecosystem theory based on thermodynamic concepts. The first chapters are devoted to an interpretation of the first and second law of thermodynamics in ecosystem context. Then Prigogine's use of far from equilibrium thermodynamic is used on ecosystems to explain their reactions to perturbations. The introduction of the concept exergy makes it possible to give a more profound and comprehensive explanation of the ecosystem's reactions and growth-patterns. A tentative fourth law of thermodynamic is formulated and applied to facilitate these explanations. The trophic chain, the global energy and radiation balance and pattern and the reactions of ecological networks are all explained by the use of exergy. Finally, it is discussed how the presented theory can be applied more widely to explain ecological observations and rules, to assess ecosystem health and to develop ecological models.

Survival of the fittest” is a tautology, because those that are “fit” are the ones that survive, but to survive, a species must be “fit”. Modern evolutionary theory avoids the problem by defining fitness as reproductive success, but the complexity of life that we see today could not have evolved based on selection that favors only reproductive ability. There is nothing inherent in reproductive success alone that could result in higher forms of life. Evolution from a Thermodynamic Perspective presents a non-circular definition of fitness and a thermodynamic definition of evolution. Fitness means maximization of power output, necessary to survive in a competitive world. Evolution is the “storage of entropy”. “Entropy storage” means that solar energy, instead of dissipating as heat in the Earth, is stored in the structure of living organisms and ecosystems. Part one explains this in terms comprehensible to a scientific audience beyond biophysicists and ecosystem modelers. Part two applies thermodynamic theory in non-esoteric language to sustainability of agriculture, and to conservation of endangered species. While natural systems are stabilized by feedback, agricultural systems remain in a mode of perpetual growth, pressured by balance of trade and by a swelling population. The constraints imposed by thermodynamic laws are being increasingly felt as economic expansion destabilizes resource systems on which expansion depends.

This book takes as a starting point, John Dewey's article, The Reflex Arc Concept in Psychology, in which Dewey was calling for, in short, the utilisation of systems theories within psychology, theories of behaviour that capture its nature as a vastly-complex dynamic coordination of nested coordinations. This line of research was neglected as American psychology migrated towards behaviourism, where perception came to be thought of as being both a neural response to an external stimulus and a mediating neural stimulus leading to, or causing a muscular response. As such, perception becomes a question of how it is the perceiver creates neural representations of the physical world. Gestalt psychology, on the other hand, focused on perception itself, utilising the term Phenomenological Field; a term that elegantly nests perception and the organism within their respective, as well as relative, levels of organisation. With the development of servo-mechanisms during the second world war, systems theory began to take on momentum within psychology, and then in the 1970s William T Powers brought the notion of servo-control to perception in his book, Behavior: The Control of Perception. Since then, scientists have come to see nature not as linear chain of contingent cause-effect relationships, but rather, as a non linear, unpredictable nesting of self referential, emergent coordinations, best described as Chaos theory. The implications for perception are astounding, while maintaining the double-aspect nature of perception espoused by the Gestalt psychologists. In short, system theories model perception within the context of a functioning organism, so that objects of experience come to be seen as scale-dependent, psychophysically-neutral, phenomenological transformations of energy structures, the dynamics of which are the result of evolution, and therefore, a priori to the individual case. This a priori, homological unity among brain perception and world is revealed through the use of systems theories and represents the thrust of this book. All the authors are applying some sort of systems theory to the psychology of perception. However, unlike Dewey we have close to a century of technology we can bring to bear upon the issue. This book should be seen as a collection of such efforts.