Dataset: CTD Profiles
Deployment: EN524

CTD profile data from EN524 cruise.

Principal Investigator:

Joan M. Bernhard (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Ocean Acidification, Hypoxia and Warming: Experimental Investigations into Compounded Effects of Global Change on Benthic Foraminifera (OA, Hypoxia and Warming)

Current State:

Final no updates expected

Version:

31 May 2013

Version Date:

2013-06-18

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/455990/data

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Description

Data from 4 CTD casts made during the May 2013 EN524 cruise aboard R/V Endeavor. Data have been preliminarily processed by the ship's technician during the cruise for initital sensor check. No post-cruise processing or calibrations have been applied.

Methods & Sampling

Dataset acquisition description

Notes from the ship's technician:
No CTD "in water" tests were done during the cruise. Four CTD “on deck” tests were done during the cruise. Sampling casts were to ~72m, or shallower ~4m above bottom. The PAR and SPAR sensors were not installed at all during the cruise. Unless otherwise requested, only Primary Cond is advanced in deck unit. However, our Version 2 of SBE Model 11 plus deck unit can advance both. The Secondary Cond is advanced in processing. Max winch speed was 30 m/min. 12 place frame with 12 OTE external tension sample bottles were used.

CTD gets GPS from bridge switch. Whatever GPS they have selected is the unit that is used (most likely Northstar/Furuno WAAS or Furuno WAAS). 4800 baud.

The seas were calm for most of the cruise with rain and winds to ~25kts on 20 May 2013.

The CTD for all four casts had Pressure, dual Temperature and Conductivity sensors and Pumps, WET Labs C-Star 25cm Transmissometer, WET Labs ECO Fluorometer, Benthos Altimeter, SBE43 Oxygen 1, Oxygen 2 sensors and 12 OTE 10L Niskin bottles on the smaller (12pl) of GSO’s SBE frames. CTD was horizontally mounted.

Data Processing Description

Dataset Processing Description

Notes from the ship's technician:
Data have been preliminarily processed by the ship's technician during the cruise for intitial sensor check. No post-cruise processing or calibrations have been applied. Pressure and blocked transmissometer values from a deck test were used to create con files with updated pressure and transmissometer sensor coefficients. All casts were processed with updated con files (con file used named "EN524_0444d_NoPS.xmlcon").

Configuration Reports (PDF files):
CTD con report
CTD psa report

BCO-DMO Processing Notes:
Modified parameter names to conform with BCO-DMO naming conventions;
Removed several columns from data display: flag (all values were 0), nbin, pump_status (all values were 1), voltages, DepSM2 (all values identical to DepSM), scan;
Added starting date, time, lat, and lon from the CTD file headers.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1219948	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird SBE 911plus

Supplied Description:

Sea-Bird 911+ CTD w/ 12 OTE 10L water samplers.

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
sci_event	Event number designation provided by science party.	integer	event
date	Date of CTD cast event.	mmddYYYY	date
time_start	Time (UTC) at start of CTD cast.	HHMM.mm	time_start
lat_start	Latitude at start of cast. Positive values = North.	decimal degrees	lat_start
lon_start	Longitude at start of cast. Negative values = West.	decimal degrees	lon_start
ISO_DateTime_UTC_start	Start date/time (UTC) formatted to ISO 8601 standard. T indicates start of time string; Z indicates UTC.	YYYY-mm-ddTHH:MM:SS.ssZ	ISO_DateTime_UTC
press	Pressure (Digiquartz); originally named 'PrDM'.	decibars	press
depth	Depth; originally named 'DepSM'.	meters	depth
alt	Altitude of instrument above the bottom; originally named 'AltM'.	meters	altitude
lat	Latitude. Positive values = North.	decimal degrees	lat
lon	Longitude. Negative values = West.	decimal degrees	lon
time_elapsed	Time elapsed; originally named 'TimeS'.	seconds	time_elapsed
temp	Temperature (ITS-90) from primary sensor; originally named 'T090C'.	degrees Celsius	temp
temp2	Temperature (ITS-90) from secondary sensor; originally named 'T190C'.	degrees Celsius	temp2
temp_diff	Temperature difference; secondary - primary (temp2 - temp); originally named 'T2-T190C'.	degrees Celsius	no_bcodmo_term
cond	Conductivity from primary sensor; originally named 'C0S/m'.	siemens per meter (S/m)	cond
cond2	Conductivity from secondary sensor; originally named 'C1S/m'.	siemens per meter (S/m)	cond2
cond_diff	Conductivity difference; secondary - primary (cond2 - cond); originally named 'C2-C1S/m'.	siemens per meter (S/m)	no_bcodmo_term
sal	Salinity from primary sensor; originally named 'Sal00'.	PSU	sal
sal2	Salinity from secondary sensor; originally named 'Sal11'.	PSU	sal2
O2	Oxygen from from primary SBE 43 sensor; originally named 'Sbeox0ML/L'.	milliliters per liter (mL/L)	O2
O2_2	Oxygen from secondary SBE 43 sensor; originally named 'Sbeox1ML/L'.	milliliters per liter (mL/L)	O2
O2_v	Raw oxygen (volts) from primary SBE 43 sensor; originally named 'Sbeox0V'.	volts	O2_v
O2_v2	Raw oxygen (volts) from secondary SBE 43 sensor; originally named 'Sbeox1V'.	volts	O2_v
beam_c	Beam Attenuation from WET Labs C-Star; originally named 'CStarAt0'.	reciprocal meters (1/m)	beam_c
trans	Beam Transmission from WET Labs C-Star; originally named 'CStarTr0'.	%	trans
fluor	Fluorescence from WET Labs ECO-AFL/FL; originally named 'FlECO-AFL'.	milligrams per cubic meter (mg/m^3)	fluor
sigma_0	Density (sigma-theta) from primary sensor; originally named 'Sigma-e00'.	kilograms per cubic meter (kg/m^3)	sigma_0
sigma_0_2	Density (sigma-theta) from secondary sensor; originally named 'Sigma-e11'.	kilograms per cubic meter (kg/m^3)	sigma_0
potemp	Potential Temperature (ITS-90) from primary sensor; originally named 'Potemp090C'.	degrees Celsius	potemp
sound_vel	Sound velocity (Chen-Millero) from primary sensor; originally named 'SvCM'.	meters per second (m/s)	sound_vel
sound_vel2	Sound velocity (Chen-Millero) from secondary sensor; originally named 'SvCM1'.	meters per second (m/s)	sound_vel
descent_rate	Descent rate; originally named 'Dz/dtM'.	meters per second (m/s)	descent_rate
geop_anomaly	Geopotential anomaly; originally named 'Gpa'.	joules per kilogram (J/kg)	no_bcodmo_term

Database

Contribute Data

Dataset: CTD Profiles
Deployment: EN524

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD ProfilesDeployment: EN524

Dataset acquisition description

Dataset Processing Description

Dataset: CTD Profiles
Deployment: EN524