The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.

The carbon cycle is thought of including the following major reservoirs of carbon: the atmosphere, the terrestrial biosphere, the oceans, the sediments and the Earth's interior.

The carbon cycle is one of the most important cycles of the Earth and allows for carbon to be recycled and reused throughout the biosphere and all of its organisms.

碳循環(huán)是一個(gè)生物地質(zhì)化學(xué)循環(huán)圈，碳通過(guò)此循環(huán)在生物圈、土壤圈、地層、水圈、大氣中交流。

碳循環(huán)一般包括以下幾個(gè)主要的碳儲(chǔ)藏所：大氣、陸地生物圈、海洋、沉積物以及地球內(nèi)部。

碳循環(huán)是地球最重要的循環(huán)之一，它使碳在整個(gè)生物圈及其所有有機(jī)體中得到循環(huán)和重復(fù)利用。