ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Canopy closure Crown closure is a term used in forestry. Crown closure and crown cover are two slightly different measures of the forest canopy and that determine the amount of light able to penetrate to the forest floor. Wikipedia https://en.wikipedia.org/wiki/Crown_closure Added to support Critical Zone Observatory (CZO) data use cases.