carbon cycle


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Related to carbon cycle: nitrogen cycle, water cycle, Oxygen cycle

car·bon di·ox·ide cy·cle

, carbon cycle
the circulation of carbon as CO2 from the expired air of animals and decaying organic matter to plant life where it is synthesized (through photosynthesis) to carbohydrate material, from which, as a result of catabolic processes in all life, it is again ultimately released to the atmosphere as CO2.

carbon cycle

n.
1. Physics See carbon-nitrogen-oxygen cycle.
2. Ecology The combined processes, including photosynthesis, decomposition, and respiration, by which carbon as a component of various compounds cycles between its major reservoirs—the atmosphere, oceans, and living organisms.

carbon cycle

the steps by which carbon in the form of carbon dioxide is extracted from and returned to the atmosphere by living organisms, especially human beings. The process starts with the photosynthetic production of carbohydrates by plants, progresses through the consumption of carbohydrates by animals and human beings, and ends with the exhalation of carbon dioxide by those same animals and human beings and with the release of carbon dioxide during the decomposition of dead plants and animals. Various chemical processes intervene between the ingestion of carbohydrates and the release of carbon dioxide. Carbohydrate metabolism starts with the movement of glucose through plasma membranes and subsequently involves glycolysis, the processes of the citric acid cycle, electron transport, and oxidative phosphorylation. See also citric acid cycle.

carbon cycle

A general term for the flux of CO2 from the point of fixation by photosynthesis to its release into the atmosphere by anthropogenic activities.

car·bon di·ox·ide cy·cle

, carbon cycle (kahr'bŏn dī-oks'īd sī'kĕl)
The circulation of carbon as CO2 from the expired air of animals and decaying organic matter to plant life where it is synthesized (through photosynthesis) to carbohydrate material, from which, as a result of catabolic processes in all life, it is again ultimately released to the atmosphere as carbon dioxide.

carbon cycle

The important biological cycle in which carbon in carbon dioxide in the atmosphere is taken up by plants, incorporated, by photosynthesis, into carbohydrates which are eaten by animals, and the carbon then oxidised and finally returned to the atmosphere as carbon dioxide waste gas.
Carbon cycleclick for a larger image
Fig. 90 Carbon cycle . The main steps.

carbon cycle

the circulation of carbon by the metabolic processes of living organisms in an ECOSYSTEM so that it always returns to an arbitrary starting point.
References in periodicals archive ?
I believe our industry has to help balance the carbon cycle by engaging and dialoguing with the brand owner.
If we look at the carbon cycle and its implications, it is clear that its simple, yet radical, slogan points to the only effective and lasting way to combat global climate change.
High-precision and high-accuracy measurements of atmospheric composition, like those acquired by the Picarro EnviroSense analyzer, are essential to our ability to observe and understand the earth's carbon cycle.
Richard Feely, another of the lead authors, adds: "These numbers are used to constrain the global carbon cycle models.
It is an essential instrument in the science of quantifying the global carbon cycle for the U.
Do members of the council understand the carbon cycle (they probably think it's a bike)?
That this is even being discussed as a serious possibility shows how quickly the carbon cycle has gone from what seems to many to be an arcane science to securing a place in the world's economic and political arena.
He rejoices in turns of phrase like "protoctists pop out of their protective cysts" and "the great mycelial clot beneath a toadstool"; of the burning of fossil fuels he remarks that the carbon released in the process "floods the carbon cycle, as if the dead should arise from their graves and flood the job market.
WASHINGTON, March 13, 2015 /PRNewswire-USNewswire/ -- NASA is beginning work on a new satellite mission that will extend critical climate measurements of Earth's oceans and atmosphere and advance studies of the impact of environmental changes on ocean health, fisheries and the carbon cycle.
Some of the most rapid changes associated with warming are occurring in polar terrestrial, freshwater and marine ecosystems, associated with changes in the carbon cycle (C-cycle), sea ice dynamics, nutrient loadings and perturbation of sinks of persistent organic pollutants (POPs) and greenhouse gases.
LOS ANGELES (CyHAN)- NASA's Orbiting Carbon Observatory-2, or OCO-2, is designed to study the global carbon cycle from a whole new perspective.
Mark Torres, a doctoral fellow at the USC Dornsife College of Letters, Arts and Sciences, said that life's presence on Earth is dependent upon this carbon cycle, asserting that this shy it is able to survive.