ctd-TMR

Data Object CTD_TMR_SFX_RR

contact PIs:

name	title
Dr Ken Johnson	Principal Investigator

Dataset description

CTD pressure, temperature, salinity profiles from Trace Metal Clean Rosette (TMR) CTD instrument package

Acquisition description

 dates:           11 January 2002 to 10 February 2002  (20020111-20020210)
 location:        N: -54.093  S: -66.602  W: -172.038  E: -169.242 
 project/cruise:  SOFeX/RR

Processing description

 DMO notes: original version prepared from CTD (TMR CTD) casts
 Added to OCB: 10 January 2006 by Cyndy Chandler (cchandler@whoi.edu)
 
 Questions:
 are times UTC or GMT ?
 still unsure about some user sensors

10 January 2006: Prepared for OCB data system by Terry McKee (PO Dept, WHOI) and Cyndy Chandler, OCB DMO (WHOI).

Data were processed using the standard set of Seabird utilities, to generate final 1-decibar pressure sorted downtrace files for all CTD casts. All final processed *.asc CTD files were downloaded by the OCB DMO in December 2005 from the SOFeX web site:
http://www.mbari.org/SOFeX/Revelle_Data/Revelle_Station_Data/Revelle_TMR_CTD_data.htm

The event number, date, time, latitude and longitude position information were taken from the *.hdr CTD header files. For TMR1 station 7, the latitude may have been entered incorrectly during data acquisition (55 °W) but was not changed to be consistent with the cruise Activity Log (56 °W).

Final CTD station header record showing history of processing steps:
TMR-CTD station 7

Final CTD station configuration (con report) files were not provided with .asc files.

MATLAB data processing scripts:
Physical properties of seawater function was used to compute potential density:: PhyPropSW sw_pden.m

Field Names List

Parameter	Description	Units
sta	station identifier	dimensionless
ev_type	event type descriptor string	dimensionless
event	unique sampling event composite of date and time	YYYYMMDDhhmm
date	date sampling began	YYYYMMDD
time	time sampling began	hhmm
lon	longitude, negative denotes West	decimal degrees
lat	latitude, negative denotes South	decimal degrees
press	pressure, from CTD Strain Gauge	decibars
depth	depth, calculated from pressure	meters
temp	temperature, from CTD, ITS-90	degrees Celsius
sal	salinity, from CTD, PSS-78 (PSU)	dimensionless
sigma_0	sigma theta (potential density) (from primary T0,C0 sensors)	kilograms/meter^3
potemp	potential temperature, ITS-90 (from primary T0,C0 sensors)	degrees Celsius
fluor	fluorescence, from CTD profiler (is this fluor_chla ??)	micrograms/liter ??
V0	unknown	unknown ??
cond	conductivity, from CTD (from primary C0 sensor)	S/m

Platforms List

R/V Roger Revelle DRFT08RR

Instruments List

CTD Seabird 25:

This document is created from the content of the BCO-DMO metadata database. 2009-11-22 09:45:44

info app: /home/ocb/dbase v.090827 CLC
Data URL: http://ocb.whoi.edu/jg/serv/OCB/SOFeX/Revelle/ctd-TMR.