Questions tagged [biogeochemistry]
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Why don't most organisms use magnesium in their shells and bones if it is lighter and more common than calcium?
Magnesium is one of the most abundant elements in the Universe and on Earth....
So why is it not used in the forms of Magnesium Carbonate and Magnesium Phosphates (Hydroxyapatites, etc.) to make ...
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How do I convert an element measurement to oxides?
So, I did some measurements in ICP-OES and the results were given to me in elemets. However, I need to convert the results to oxides. After some googling I found out that I need to use simple ...
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Why does decreasing surface alkalinity increase surface pCO2?
According to Takahashi et al. (1993), pCO2 (partial pressure of CO2) in the surface ocean changes due to 4 surface variables: temperature, salinity, total carbon (dissolved inorganic carbon, DIC) and ...
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Can base saturation percentage be greater than 100%?
I have been doing some quality analysis on soil analytical data that I've gathered from some environmental impact assessments. Many of the values for base saturation percentage are well over 100% (...
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How to convert Carbon stored in surface sediments (kg/m2) to percent?
I need to convert organic carbon provided in kg C/m2 to percent.
Any help would be appreciated.
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How far into the past would you have to go before you couldn't breathe the atmosphere?
Not counting temporary events, like mass extinctions.
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convert mol/m2 to μg/m3 [duplicate]
Sentinel-5P satellite provides high-resolution data products on concentration levels for several atmospheric trace gases (NO2, SO2, O3, and others), which are measured in mol/m2 within the total or ...
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Atmospheric $\ce{CO2}$ fell at a Pleistocene interglacial-glacial transition. Ocean absorption vs biosphere absorption
CO2 levels fell during the last interglacial-glacial transition until the Last Glacial Maximum in the Pleistocene.
I can think of two causes for the reduction of CO2:
Ocean absorption. The ...
user20559
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Do trees capture more CO2 during a fast growth stage?
I understand that trees capture CO2 from the air and use that carbon to grow. As trees reach mature height, do they begin to capture less CO2 as they would only need carbon for "maintenance" as ...
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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 ...
user18590
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Is the ocean a carbon sink when considering only the biospheric component?
Most people knows that the ocean overall is a carbon sink, but a big part of the sink is due to chemical equilibrium (via dissolution) with the atmosphere (for ref: https://link.springer.com/article/...
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Where does molecular hydrogen in the atmosphere come from?
This figure from Wikipedia's Atmosphere of Earth shows a hydrogen fraction of 0.000055 percent by volume.
Question: Where does molecular hydrogen in the atmosphere come from?
Does this come directly ...
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How much net carbon can coral sequester?
So I am wondering how much carbon any given coral can sequester given that carbon dioxide dissolves in water and forms carbonic acid, and coral uses that carbonic acid in their own calcification ...
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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 ...
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How quickly can coral fossilize?
On a trip to Honduras a few years ago I visited one of the islands off its north coast with a friend and went to a section of it mostly with nothing but residences which looked far less visited by ...
