dcterms created | ||
---|---|---|
definition | A package lowered and raised vertically from a surface platform usually a ship. A CTD measures Conductivity, Temperature and Depth. Despite the name, all CTDs actually measure pressure. The CTD is attached to a frame fitted with a number of large water-collecting bottles called Niskins, the instrument together with the bottles is called the CTD rosette. The Niskin bottles are designed so that they have lids at both ends. They are sent down open, and triggered to close electronically at the depth that water needs to be collected. Additional optional sensors include ADCP, fluorometers, transmissometers and radiometers. |
dcterms created | ||
---|---|---|
dcterms modified | ||
definition | Instrument that simultaneously measures electrical conductivity and temperature in the water column. To reduce costs, the instrument may not include a pressure sensor, because the deployment depth is know (approximately). | |
narrower |
dcterms created | ||
---|---|---|
dcterms modified | ||
definition | Instrument that measures wind speed and direction at a single elevation | |
narrower |
dcterms created | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
dcterms modified | ||||||||||||||||
definition | Instrument that measures water column surface wave parameters including height period direction and energy spectra. | |||||||||||||||
narrower |
|
dcterms created | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
dcterms modified | ||||||||||||||||||||
definition | Instrument that make smoothed measurements of the elevation of the sea surface relative to a fixed vertical datum | |||||||||||||||||||
narrower |
|
dcterms created | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
definition | Instrument that measures the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into the water column | |||||||||||
narrower |
|
dcterms created | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
definition | Instrument that measures current speed and direction at a single depth | |||||||||
narrower |
|
dcterms created | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
dcterms modified | ||||||||||||||||||||
definition | Instrument that measures current speed and direction at multiple predetermined depths simultaneously | |||||||||||||||||||
narrower |
|
dcterms created | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
dcterms modified | ||||||||||||||||||
definition | Instrument that measures the intensity of electromagnetic radiation in either the atmosphere or the water column | |||||||||||||||||
narrower |
|