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Concept

POC/Th-234 ratio

URI http://vocab.nerc.ac.uk/collection/S06/current/S0600295/
Within Vocab BODC parameter semantic model parameter entity names
Alternative Labels
Definition The ratio of particulate organic carbon (POC) concentration to thorium-234 activity. Thorium is insoluble in seawater and is scavenged by particles as they form and/or sink through the water column. This causes a radioactive disequilibrium between 238U and 234Th in the upper water column, which is proportional to the numbers of particles exported. The POC/Th-234 ratio is hence used to estimate particle and elemental export fluxes.
Date 2022-10-10T14:39:15
Identifier SDN:S06::S0600295
Note accepted
Has Current Version 1
version 1
Narrower
P01 BODC Parameter Usage Vocabulary - (4) [+]
P01:POCTHP07 POC/Th-234 ratio of particles in the water body [particulate >0.7um phase] Mapping: 1742562
P01:POCTHP50 POC/Th-234 ratio of particles in the water body [particulate >50um phase] Mapping: 1742570
P01:POCTHU07 POC/Th-234 ratio uncertainty of particles in the water body [particulate >0.7um phase] Mapping: 1742636
P01:POCTHU50 POC/Th-234 ratio uncertainty of particles in the water body [particulate >50um phase] Mapping: 1742646

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