What is DOC and POC?
What is DOC and POC?
Dissolved organic carbon (DOC) is defined as the organic matter that is able to pass through a filter (filters generally range in size between 0.7 and 0.22 um). Conversely, particulate organic carbon (POC) is that carbon that is too large and is filtered out of a sample.
What is DOC and DIC?
Dissolved organic carbon (DOC) Dissolved inorganic carbon (DIC) Particulate organic carbon (POC) Particulate inorganic carbon (PIC)
Why is DIC high in Pacific?
Carbon (C) Concentrations are lowest in the Atlantic, where deep water sinks into the ocean depth, and higher in the deep waters of the Pacific as POC sinks into the deep-sea and is remineralized to DIC (data). Dissolved organic carbon (DOC) concentrations accumulate to high concentrations near the surface, as well.
Where does dissolved inorganic carbon come from?
Biological pump Dissolved inorganic carbon in the form of carbon dioxide is fixed into organic carbon is produced through photosynthesis. Respiration is the reverse process and consumes organic carbon to produce inorganic carbon.
What is the purpose of the doc?
In modern diesel aftertreatment systems, an important function of the DOC is to oxidize nitric oxide (NO) to nitrogen dioxide (NO2)—a gas needed to support the performance of diesel particulate filters and SCR catalysts used for NOx reduction.
How is Doc formed?
DOC is often largely derived from terrestrial vegetation (so-called allochthonous sources), and deposited from lake catchments either by streams or by overland flow. In some environments, however, in situ algal and macrophyte production can give rise to large quantities of DOC (autochthonous sources).
What is DIC in water?
Dissolved inorganic carbon (DIC) refers to the total amount of CO2, HCO3− plus CO32− in sea water, while the partial pressure of CO2 (Pco2) measures the contribution of CO2 to total gas pressure.
Why is the biological pump important?
The particle flux, often termed the biological pump, plays a central role in biogeochemical cycles of carbon and many elements, provides the main food source for life in the ocean interior and controls, in part, ocean uptake of atmospheric carbon dioxide and spatial patterns of ocean productivity.
What is the carbonate pump?
The carbonate pump, sometimes called the carbonate counter pump, starts with marine organisms at the ocean’s surface producing particulate inorganic carbon (PIC) in the form of calcium carbonate (calcite or aragonite, CaCO3). This CaCO3 is what forms hard body parts like shells.
What are the 4 inorganic compounds?
In general, there are four groups of inorganic compound types. They are divided into bases, acids, salts, and water.
What opens a DOC file?
Microsoft Word (version 97 and above) is the primary program used for opening and working with DOC files, but it isn’t free to use. There are free alternatives to Microsoft Office that include support for DOC files, like LibreOffice Writer, OpenOffice Writer, and WPS Office Writer.
What DOC file means?
DOCument file
(DOCument file) The default file format in a version of Word, Microsoft’s word processing application prior to Microsoft Office 2007. DOC files use a . TXT extension) because they contain proprietary codes that must be opened in Word or software that reads the Word format.
What is the difference between Doc and POC?
Dissolved organic carbon (DOC) is defined as the organic matter that is able to pass through a filter (filters generally range in size between 0.7 and 0.22 um). Conversely, particulate organic carbon (POC) is that carbon that is too large and is filtered out of a sample.
What is particulate organic carbon (POC)?
Conversely, particulate organic carbon (POC) is that carbon that is too large and is filtered out of a sample. If you have ever seen a body of water that appears straw, tea, or brownish in color, it likely has a high organic carbon load. This color comes from the leaching of humic substances from plant and soil organic matter.
What are the requirements for measuring POC in soil samples?
The method also requires that the sample has a measurable amount of organic carbon present. POC in soil samples can also be measured by mass loss by measuring the dry weight of a given volume of sample before and after combustion.
