Questions tagged [biogeochemistry]

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Effect of snow on BVOC emmisions of plants/trees

Plants re-emit a substantial fraction of their assimilated carbon into the atmosphere as Biogenic Volatile Organic Compounds (BVOCs) that affect the chemical and physical properties of the atmosphere. ...
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5 votes
1 answer
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Has Earth's atmosphere lost mass throughout the geological ages due to biological $\small\sf{CO_2}$ fixation?

Stromatolites and other organisms have been storing $\small\sf{CO_2}$ in the form of $\small\sf{CaCO_3}$ throughout the geological ages, forming extensive limestone deposits scattered across Earth's ...
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4 votes
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Sulfate reduction

I read a document in which the authors stated "Sulfate and sulfide ( bisulfide and dihydrogen sulfide) both exist within a system just in varying proportions, and aqueous speciation is dependent on Eh/...
Don's user avatar
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4 votes
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A question about the disruption of global geochemical cycle in anthropocene

We often only hear of problems with the carbon, nitrogen & water cycles etc. I would like to know if there have been any observed problems with other cycles - for example, the iron cycle, ...
y chung's user avatar
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3 votes
0 answers
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Formation of dolomite

What are the kinetic barriers to dolomite precipitation? Does it precipitate out in solution as quickly as Calcite does?
chrisuw92's user avatar
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1 vote
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Do living things have a magnetic field capable of any level of solar protection?

I understand how anything with an electrical current have a magnetic field including living things. Would a densely populated rain forest or jungle have enough combined magnetic field among the living ...
Muze's user avatar
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1 vote
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Formation of minerals from decomposition of soil

I was wondering if aerobic decomposition of organic rich soils, also rich in calcium and sulfur, can result in the precipitation of gypsum. My thinking is the decomposition would release the ...
Henry's user avatar
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