Change Date: 24 Feb 2026, 10:04 a.m.
mass_concentration_of_ope_in_particulate_organic_matter_in_sea_water kg m-3 [UKMC] "Mass concentration" means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". OPE means organophosphate esters with the general structure O=P(OR)3. OPE is the term used in standard names to describe the group of chemical species having this common structure that are represented within a given model. The list of individual species that are included in a quantity having a group chemical standard name can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute. Particulate organic matter (also called POM) means organic matter that does not pass through a reference filter pore size.