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Thermodynamics earth system

thermodynam

Thermodynamics earth system

Thermodynamics is a term used to describe the set of natural laws that govern the transfer of energy from one body to another. Thermodynamics (comes from Greek  “therme”, heat and dynamics, power)  control behaviour of energy as it moves in and out of the Earth system, and among its reservoirs. The first law of thermodynamics; It expresses that in any physical or chemical process, energy is conserved (i.e. it is neither created nor destroyed).

It’s simply transformed from one form of energy into another form of energy. This is exactly the same occurrence in Earth system processes when, for example, a growing plant converts sunlight (radiated energy) to make carbohydrates, which, in fact, is a stored chemical energy, a process called photosynthesis. According to the second law of thermodynamics energy always changes from a more useful, more concentrated form to a to a lesser degree compacted form or less available. One important consequence of the degradation is that energy cannot be completely recycled. Furthermore, the energy becomes dispersed as heat in the increased disorganization (the measure of this is called entropy) in the system. Third Law: Absolute Zero. The third law of thermodynamics postulates the existence of the state of absolute zero temperature. Temperature is a measure of heat, the vibrational motion of particles. In a state of absolute zero temperature, all the microscopic molecular motions on which we based our definition of heat (above) would cease.

Sources: Global Warming the complete brief, Sir John Houghton The Laws of Science The blue planet an introduction to earth system science Brian J . Skinner Yale university Barbaramurck university of Toronto 3rd edition John Wiley


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