Certainly! Let’s break down the carbon cycle and highlight specific processes that move carbon between different spheres:
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Atmosphere to Biosphere:
- Process: Photosynthesis
- Description: Plants in the biosphere absorb carbon dioxide (CO2) from the atmosphere and convert it into glucose and oxygen using sunlight. This process not only helps in the growth of plants but also acts as a significant carbon sink.
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Biosphere to Lithosphere:
- Process: Decomposition
- Description: When plants and animals die, decomposers such as bacteria and fungi break down their organic matter, releasing carbon back into the soil (lithosphere) in the form of organic carbon compounds. Some of this may eventually become fossilized as fossil fuels over geological time.
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Lithosphere to Atmosphere:
- Process: Combustion
- Description: When fossil fuels (coal, oil, natural gas) are burned for energy, carbon that had been stored in the lithosphere is released back into the atmosphere as CO2. This is a significant contributor to greenhouse gas emissions.
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Atmosphere to Hydrosphere:
- Process: Dissolution
- Description: CO2 from the atmosphere can dissolve in oceans, lakes, and rivers (the hydrosphere). This process is vital for maintaining the carbonate equilibrium in ocean water.
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Hydrosphere to Atmosphere:
- Process: Evaporation
- Description: Some dissolved CO2 can be released back into the atmosphere from water bodies through evaporation or gas exchange processes.
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Biosphere to Hydrosphere:
- Process: Runoff
- Description: Carbon from plants and soil can be washed into rivers and oceans through surface runoff during rain or melting snow, introducing carbon into the hydrosphere.
Each of these processes shows how carbon is continuously cycled through the different spheres, affecting and regulating the global climate and ecosystem health.