EnvThes
type: ConceptScheme

secchi depth
type: Concept

deprecated concept
type: Concept

secchi depth
type: Concept
in scheme: EnvThes
note: [controlled by ] Alessandro Oggioni 23.05.2013 , "[controlled by ] Alessandro Oggioni 23.05.2013
is replaced by: secchi depth
alternative label: secchi
scope note: US LTER controlled vocabulary
definition: n. is a measure of water trasparency in oceans and lakes. N. is measured by Secchi disk created in 1865 by Pietro Angelo Secchi. Secchi disk is a circular disk mounted on a pole or line, and the depth at which the pattern on the disk is no longer visible is taken as a measure of the transparency of the water.
broader: deprecated concept
deprecated: true