Parameter: YSI_depth_surface_m

Dataset: 
Pseudo-nitzschia counts, nutrients and more
Parameter: 
depth
Master parameters information
Short Name:
 depth
Short Description:
 depth
Official Name:
 depth
No Data Value:
 nd
Description:
 

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

When used in a JGOFS/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.

Dataset-parameters information
Supplied Name: 
YSI_depth_surface_m
Supplied Units: 
meters
Datatype: 
Float
Conversion Necessary: 
no
Conversion Utility: 
No Data Value: 
nd
Description: 
The depth at which water temperature and salinity measurements were recorded for surface water samples. The depth sensor on the YSI ProDSS was calibrated each day of use using the internal calibration on the device following manufacturer's protocol and the depth was offset by the probe sensors' tip distance from bulkhead which was 0.272 m. It was unknown what the calibration for depth was for the other YSI instrument models. If not indicated (nd) and there are YSI measurements: the shallowest measurement was used as the surface value typically on the upcast