Dataset: CTD_Profiles

Name: CTD Profiles from R/V Knorr cruise KN207-03 in the North Atlantic (transect from Ponta Delgada, Azores to Reykjavik, Iceland) in 2012 (NA-VICE project)
Published: 2013-02-08
Keywords: oceans

Cite This Dataset

Spatial Extent: N:63.3478 E:-26.4407 S:40.6573 W:-35.0738

Project:

Lipid lubrication of oceanic carbon and sulfur biogeochemistry via a host-virus chemical arms race (NA-VICE)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Principal Investigator:

Kay D. Bidle (Rutgers University, Rutgers IMCS)

Giacomo DiTullio (College of Charleston, CofC)

Benjamin A.S. Van Mooy (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Co-Principal Investigator:

Marco Coolen (Woods Hole Oceanographic Institution, WHOI)

Assaf Vardi (Weizmann Institute of Science)

BCO-DMO Data Manager:

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

Version:

08 Feb 2013

Version Date:

2013-02-08

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD Profiles from R/V Knorr cruise KN207-03 in the North Atlantic (transect from Ponta Delgada, Azores to Reykjavik, Iceland) in 2012 (NA-VICE project)

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Description

CTD data from a SeaBird 911+ collected during the KN207-03 cruise for the project 'Lipid lubrication of oceanic carbon and sulfur biogeochemistry via a host-virus chemical arms race'.

Methods & Sampling

See the CTD Configuration Report (PDF) and instrument calibration sheets (PDF).

Note regarding the SUNA nitrate sensor: The SUNA was set to output volts on a 0-5V scale. The range was set to 0-20 uM (0V=0uM, 5V=20uM) for casts 1-17. On cast 18, the range was changed to 0-40 uM and stayed that way for the remainder of the cruise.

Data Processing Description

Raw data was processed using Seasave software version 7.21e. BCO-DMO retrieved the processed downcast data files on 18 Feb 2013 and made the following modifications:
- Changed parameter names to conform to BCO-DMO conventions;
- Converted latitude and longitude from degrees and decimal minutes to decimal degrees;
- Added cast, date, time_start, lat_start, lon_start from the CTD file headers (time rounded to nearest minute);
- Removed a duplicate depth parameter (second column named 'DepSM') and the flag column (all values were 0).

Data Files

File
KN207-03_ctd.csv (Comma Separated Values (.csv), 6.61 MB) MD5:f43b03674d435b08cf2f755f169e61ce Primary data file for dataset ID 3875

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1061883

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KN207-03	NA-VICE	2012-06-15	R/V Knorr	Kay D. Bidle (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Description:

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

ISUS Nitrate sensor

Supplied Description:

A SUNA nitrate sensor rated to 500-m depth was used (reported in the 'nitrate_SUNA' column). See the SUNA Manual (PDF).

Instrument Type

Generic Name: ISUS Nitrate sensor

Acronym: ISUS Nitrate

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0135/

Generic Description:

The Satlantic ISUS nitrate sensor is an in-situ UV absorption sensor which calculates nitrate concentration from the seawater spectrum. The ISUS V2 has a 1cm path length, a 200-400 nm wavelength range., and is depth rated to 1000 m. Satlantic's ISUS V3 nitrate sensor uses advanced UV absorption technology to measure nitrate concentration in real-time.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
cast	CTD cast number.	dimensionless	cast
date	Date (GMT) of the CTD cast in YYYYmmdd format.	dimensionless	date
time_start	Time (GMT) at start of the CTD cast in HHMMSS format (rounded to the nearest minute).	HHMMSS	time_start
lat_start	Latitude in decimal degrees at start of CTD cast; negative = South.	decimal degrees	lat_start
lon_start	Longitude in decimal degrees at start of CTD cast; negative = West.	decimal degrees	lon_start
press	Water pressure, in decibars (db). (Originally named 'PrDM'.)	decibars	press
depth	Sample depth. (Originally named 'DepSM'.)	meters	depth
temp	Temperature in degrees Celsius. (Originally named 'T090C'.)	degrees C	temp
temp2	Temperature (in degrees Celsius) measured by secondary sensor. (Originally named 'T190C'.)	degrees C	temp2
cond	Conductivity measured in Siemens per meter. (Originally named 'C0S/m'.)	S/m	cond
cond2	Conductivity (in Siemens per meter) measured by secondary sensor. (Originally named 'C1S/m'.)	S/m	cond2
sal	Salinity in practical salinity units, PSU. (Originally named 'Sal00'.)	PSU	sal
sal2	Salinity in PSU measured by the secondary sensor. (Originally named 'Sal11'.)	PSU	sal2
O2_v	Raw oxygen reading in volts from SBE43 sensor. (Originally named 'Sbeox0V'.)	volts	O2_v
O2	Oxygen measured in milliLiters per Liter from SBE43 sensor. (Originally named 'Sbeox0ML/L'.)	mL/L	O2
trans	Beam transmission, as a percentage; from WET Labs CStar transmissometer. (Originally named 'Xmiss'.)	%	trans
beam_c	Beam attenuation; from WET Labs CStar transmissometer. (Originally named 'Bat'.)	1/m	beam_c
fluor	Fluorescence (in mg per cubic meter). (Originally named 'FlECO-AFL'.)	mg/m^3	fluor
turbidity	Turbidity measured using a Wet Labs FLNTURTD combination fluorometer and tubidity sensor. (Originally named 'Upoly0'.)	NTU	turbidity
par	Irradiance (µmol photons m-2 s-1) measured by Biospherical Instruments PAR sensor.	umol photons per meter^2 per second	PAR
spar	Surface Irradiance (µmol photons m-2 s-1).	umol photons per meter^2 per second	SPAR
sigma_0	Density (sigma-theta). (Originally named 'Sigma-e00'.)	kg/m^3	sigma_0
sigma_0_2	Density (sigma-theta) from secondary sensor. (Originally named 'Sigma-e11'.)	kg/m^3	sigma_0
potemp	Potential temperature in degrees Celsius; ITS-90. (Originally named 'Potemp090C'.)	degrees C	potemp
potemp2	Potential temperature in degrees Celsius; ITS-90 from secondary sensor. (Originally named 'Potemp190C'.)	degrees C	potemp2
sal_diff	Practical salinity difference; sal2 - sal. (Originally named 'SecS-priS'.)	PSU	sal_diff
temp_diff	Temperature difference; temp2 - temp. (Originally named 'T2-T190C'.)	degrees C	no_bcodmo_term
cond_diff	Conductivity difference; cond2 - cond. (Originally named 'C2-C1S/m'.)	S/m	no_bcodmo_term
O2sat	Oxygen saturation in milliLiters per Liter; calculated using Garcia & Gordon method. (Originally named 'OxsolML/L'.)	mL/L	O2sat
sound_vel	Sound velocity measured in meters per second. (Originally named 'SvWM'.)	m/s	sound_vel
geopot_anom	Geopotential anomaly measured in joules per kilogram. (Originally named 'Gpa'.)	J/kg	no_bcodmo_term
nitrate_SUNA	Output from SUNA Nitrate sensor. The sensor output is delivered to the CTD by 0 to +5V analog voltage to a dedicated port on the SBE9. The range was set to 0-20 uM (0V=0uM, 5V=20uM) for casts 1-17. On cast 18 the range was changed to 0-40 uM and stayed that way for the remainder of the cruise.(Originally named 'V6'.)	volts	no_bcodmo_term
ISO_DateTime_UTC	Starting date and time of cast formatted to ISO8601 standard. T indicates start of time string; Z indicates UTC.	YYYY-mm-ddTHH:MM:SS.ss	ISO_DateTime_UTC

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Dataset: CTD_Profiles