Results 121 to 130 of about 34,958 (163)

Particulate organic carbon in Atlantic surface waters

Nature, 1977
PARTICIPATE organic matter (POM) in the oceans has a vital role in marine ecology as it is the major food source for living organisms in surface and deep waters. Nearly all of the suspended organic matter in the oceans originates from phyto-plankton productivity in the euphotic layers and is comprised of living plankton and dead organisms (detritus ...
S. KRISHNASWAMI, D. LAL
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Particulate organic carbon flux in the subarctic Pacific

Deep Sea Research Part A. Oceanographic Research Papers, 1983
Abstract Particulate organic carbon flux was observed at 51°N, 145°W with a moored sediment trap array. Carbon leaving the euphotic zone was equivalent to 7% of the measured daily primary production. The flux decreased non-linearly with depth, and the carbon reaching the sea floor was equivalent to 3.7% of the daily primary production.
Carl J. Lorenzen, Nicholas A. Welschmeyer, Andrea E. Copping   +2 more
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Measurements of Particulate Organic Carbon, Nitrogen, and Phosphorus

2020
Carbon, nitrogen, and phosphate are three macroelements of organisms. These elements are core components of organic matter and biological macromolecules. For this reason, interest in the measurement of particulate organic carbon (POC), nitrogen (PON), and phosphorus (POP) is becoming a hot research topic.
Kai Xu, Kunshan Gao, Fei-xue Fu, David A. Hutchins   +3 more
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Particulate organic carbon in the deep sea

Deep Sea Research and Oceanographic Abstracts, 1967
Abstract Data showing the distribution of particulate and dissolved organic carbon in the tropical Pacific and Atlantic Oceans are given and support the following conclusions : (1) surface standing crop has no measurable influence on the concentration of organic particles occurring at depth; (2) below a given distance of the surface, the distribution
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Dissolved and Particulate Organic Carbon in Chesapeake Bay

Estuaries, 1998
We measured dissolved and particulate organic carbon (DOC and POC) in samples collected along 13 transects of the salinity gradient of Chesapeake Bay. Riverine DOC and POC end-members averaged 232±19 μM and 151±53 μM, respectively, and coastal DOC and POC end-members averaged 172±19 μM and 43±6 μM, respectively.
Thomas R. Fisher, James D. Hagy, Emma Rochelle-Newall   +2 more
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Carbon of Particulate Organic Matter

1984
At present the particulate material, one of the components of which in natural waters is OM, is assumed to comprise that part of OM which is retained in the filters with 0.45 – 1 µm pore size or in separators. Large OM particles in natural waters are present in an extremely scattered state and are usually not to be found in filtration particulate ...
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Dominant Edaphic Controls on Particulate Organic Carbon in Global Soils [PDF]

Global Change Biology
ABSTRACTThe current soil carbon paradigm puts particulate organic carbon (POC) as one of the major components of soil organic carbon worldwide, highlighting its pivotal role in carbon mitigation. In this study, we compiled a global dataset of 3418 data points of POC concentration in soils and applied empirical modeling and machine learning algorithms ...
Ziyu Guo, Jianzhao Liu, Liyuan He, Jorge L. Mazza Rodrigues, Ning Chen, Yunjiang Zuo, Nannan Wang, Xinhao Zhu, Ying Sun, Lihua Zhang, Yanyu Song, Dengjun Zhang, Fenghui Yuan, Changchun Song, Xiaofeng Xu   +14 more
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Can Particulate Organic Matter Reveal Emerging Changes in Soil Organic Carbon?

Soil Science Society of America Journal, 2014
This study assessed whether particulate organic matter (POM) in sand fractions, isolated by wet sieving after treatment with Na hexametaphosphate, can be a sensitive indicator of incipient changes in the content and composition of soil organic matter.
Simonsson, Magnus, Kirchmann, Holger, Magid, Jakob, Kätterer, Thomas   +3 more
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Determining true particulate organic carbon: bottles, pumps and methodologies

Deep Sea Research Part II: Topical Studies in Oceanography, 2003
The primary means of determining particulate organic carbon (POC) concentrations in aquatic environments is by filtering from water bottles or by in situ filtration with pumps and analyzing the filters. The concentrations measured by these two methods, however, can differ by a factor of 1.2–5 in temperate waters, and by factors as large as 200 in cold,
Wilford D Gardner, Mary Jo Richardson, Craig A Carlson, Dennis Hansell, Alexey V Mishonov   +4 more
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Particulate Organic Carbon and Its Composition in Jiaozhou Bay

2019
The seasonal variations of particulate organic carbon (POC) in Jiaozhou Bay were consistent with those of chlorophyll-a (Chl-a), primary productivity, particulate nitrogen (PN) and organic matters in surface sediments, and all of the highest values were found in summer. The average mass ratio of POC and PN in seawater was 6.5.
Zhiliang Shen, Heming Yang, Qun Liu
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