When we consider life as a biogeochemical agent in the Earth system then it is quite well understood how bioactivity has altered the composition of Earth's atmosphere from a CO 2 dominated to the present nitrogen-oxygen composition (e.g., [1]). In the present review article [2], A. Kleidon attempts
Design in nature, thermodynamics, and the constructal law: Comment on “Life, hierarchy, and the thermodynamic machinery of planet Earth” by A. Kleidon
✍ Scribed by Adrian Bejan
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 356 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1571-0645
No coin nor oath required. For personal study only.
✦ Synopsis
a) A growing body of knowledge shows that "design" (configurations, rhythms, scaling rules) is present in all flow systems in nature. (b) Design phenomena are not covered by the old laws of physics.
The empirical (a) has far outpaced the theoretical (b). From the clash between (a) and (b) results the better science of design in nature. Earlier attempts to address (b) consisted of contradictory statements of optimality (max, min) that, at best, have ad-hoc (limited) applicability:
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Axel Kleidon has provided this provocative attempt to construct a theory of power generation in the hierarchy of processes operating on our planet [1]. This paper reasserts the relevance of Maximum Entropy Principle. I look forward to a vigorous debate. I challenge his main conclusion that biology h