|
| | In the atmosphere or biosphere a sequence of events in
repetitive motion in which the final output feeds back into the initial input.
Examples of this include biogeochemical cycles, including the nitrogen,
carbon, and sulfur cycles in which these species are chemically processed in
gas, solid, and solution phase by physical and biological processes which
change their form, oxidation state, and physical state. [Living in the
Environment; Miller, Tyler; pg 244; 1994; Wadworth; Belmont.] [The Chemistry
of the Atmosphere and Oceans; Holland, Heinrich; pg. 1-14; 1978; Wiley
Interscience, NY.]
| |
|
