Net DOC production (NDP) in the upper 74 metres (a) and net DOC export (NDX) below 74 metres (b). At steady state, the global summation of NDX is equal to that of NDP, and is 2.31 ± 0.60 PgC yr.[1]
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Dissolved organic carbon (DOC) is the fraction of organic carbon operationally defined as that which can pass through a filter with a pore size typically between 0.22 and 0.7 micrometers.[2] The fraction remaining on the filter is called particulate organic carbon (POC).[3]
Dissolved organic matter (DOM) is a closely related term often used interchangeably with DOC. While DOC refers specifically to the mass of carbon in the dissolved organic material, DOM refers to the total mass of the dissolved organic matter. So DOM also includes the mass of other elements present in the organic material, such as nitrogen, oxygen and hydrogen. DOC is a component of DOM and there is typically about twice as much DOM as DOC.[4] Many statements that can be made about DOC apply equally to DOM, and vice versa.
DOC is abundant in marine and freshwater systems and is one of the greatest cycled reservoirs of organic matter on Earth, accounting for the same amount of carbon as in the atmosphere and up to 20% of all organic carbon.[5] In general, organic carbon compounds are the result of decomposition processes from dead organic matter including plants and animals. DOC can originate from within or outside any given body of water. DOC originating from within the body of water is known as autochthonous DOC and typically comes from aquatic plants or algae, while DOC originating outside the body of water is known as allochthonous DOC and typically comes from soils or terrestrial plants.[6] When water originates from land areas with a high proportion of organic soils, these components can drain into rivers and lakes as DOC.
The marine DOC pool is important for the functioning of marine ecosystems because they are at the interface between the chemical and the biological worlds. DOC fuels marine food webs, and is a major component of the Earth's carbon cycling.[7]
^Roshan, S. and DeVries, T. (2017) "Efficient dissolved organic carbon production and export in the oligotrophic ocean". Nature Communications, 8(1): 1–8. doi:10.1038/s41467-017-02227-3.
^"Organic Carbon". Bio-geochemical Methods. Retrieved 27 November 2018.
^Kenny, Jonathan E.; Bida, Morgan; Pagano, Todd (October 2014). "Trends in Levels of Allochthonous Dissolved Organic Carbon in Natural Water: A Review of Potential Mechanisms under a Changing Climate". Water. 6 (10): 2862–2897. doi:10.3390/w6102862.
^Moody, C.S. and Worrall, F. (2017) "Modeling rates of DOC degradation using DOM composition and hydroclimatic variables". Journal of Geophysical Research: Biogeosciences, 122(5): 1175–1191. doi:10.1002/2016JG003493.
^Hedges, John I. (3 December 1991). "Global biogeochemical cycles: progress and problems" (PDF). Marine Chemistry. 39 (1–3): 67–93. doi:10.1016/0304-4203(92)90096-s.
^Kritzberg, Emma S.; Cole, Jonathan J.; Pace, Michael L.; Granéli, Wilhelm; Bade, Darren L. (March 2004). "Autochthonous versus allochthonous carbon sources of bacteria: Results from whole-lake 13C addition experiments" (PDF). Limnology and Oceanography. 49 (2): 588–596. Bibcode:2004LimOc..49..588K. doi:10.4319/lo.2004.49.2.0588. ISSN 0024-3590. S2CID 15021562.
^Lønborg, C., Carreira, C., Jickells, T. and Álvarez-Salgado, X.A. (2020) "Impacts of global change on ocean dissolved organic carbon (DOC) cycling". Frontiers in Marine Science, 7: 466. doi:10.3389/fmars.2020.00466. Material was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.
and 27 Related for: Dissolved organic carbon information
Dissolvedorganiccarbon (DOC) is the fraction of organiccarbon operationally defined as that which can pass through a filter with a pore size typically...
Total organiccarbon (TOC) is an analytical parameter representing the concentration of organiccarbon in a sample. TOC determinations are made in a variety...
Colored dissolvedorganic matter (CDOM) is the optically measurable component of dissolvedorganic matter in water. Also known as chromophoric dissolved organic...
organic or inorganic, and as dissolved or particulate, depending on their composition. Organiccarbon forms the backbone of key component of organic compounds...
responsible for transforming dissolved inorganic carbon (DIC) into organic biomass and pumping it in particulate or dissolved form into the deep ocean. Inorganic...
Like inorganic carbon, there are two main forms of organiccarbon found in the ocean (dissolved and particulate). Dissolvedorganiccarbon (DOC) is defined...
responsible for transforming dissolved inorganic carbon (DIC) into organic biomass and pumping it in particulate or dissolved form into the deep ocean. Inorganic...
inorganic carbon (CT or TIC) is the sum of the inorganic carbon species. Carbon compounds can be distinguished as either organic or inorganic, and dissolved or...
microbial loop describes a trophic pathway where, in aquatic systems, dissolvedorganiccarbon (DOC) is returned to higher trophic levels via its incorporation...
Soil carbon is the solid carbon stored in global soils. This includes both soil organic matter and inorganic carbon as carbonate minerals. It is vital...
Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial...
not only phytoplankton, as basal resource, but also dissolvedorganiccarbon. Dissolvedorganiccarbon is used by heterotrophic bacteria for growth are predated...
Particulate organiccarbon (POC) is a closely related term often used interchangeably with POM. POC refers specifically to the mass of carbon in the particulate...
although small amounts of carbon leave the terrestrial biosphere and enter the oceans as dissolvedorganiccarbon (DOC). Most carbon in the terrestrial biosphere...
representing of subset of TC is measured; examples include Total organiccarbon (TOC), Particulate inorganic carbon (PIC), and Dissolvedorganiccarbon (DOC)....
microbial pump is responsible for the production of old recalcitrant dissolvedorganiccarbon (DOC) which is >100 years old. Plankton in the ocean are incapable...
sequester huge amounts of carbon. Wild seaweed will sequester large amount of carbon through dissolved particles of organic matter being transported to...
initially incorporated into a four-carbonorganic acid (either malate or aspartate) in the mesophyll. The organic acids then diffuse through plasmodesmata...
than 98% of the dissolved inorganic carbon pool, along with a rapid sedimentation rate that results in low particulate organiccarbon inputs. It is yet...
of dissolvedorganiccarbon". Journal of Plankton Research. 27: 27–35. doi:10.1093/plankt/fbh147. Møller, Eva Friis (2007). "Production of dissolved organic...
International License. Hansell DA and Craig AC (2015) "Marine DissolvedOrganic Matter and the Carbon Cycle". Oceanography, 14(4): 41–49. doi:10.5670/oceanog...
Carbon dioxide removal (CDR) is a process in which carbon dioxide (CO2) is removed from the atmosphere by deliberate human activities and durably stored...
substances that have not yet been decomposed in the dissolvedorganiccarbon (DOC) pool. In any form, if the carbon gets respired or decomposed by any living organism...
particulate organic carbon (POC) and dissolvedorganiccarbon (DOC). POC is the largest component of organiccarbon delivered to the bathypelagic zone;...
cover. Positive carbon cycle feedbacks occur when organic matter burns or decays, releasing CO2 back into the atmosphere. Loss of organic matter can happen...
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Material was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.
