Dataset: combined CTD

Name: Combined CTD profiles for two CTD sensor packages on R/V Knorr KN192-05 from November to December 2007
Published: 2019-07-29
Keywords: oceans

View Data: Data not available yet

Cite This Dataset

Spatial Extent: N:-11 E:14.5 S:-25 W:-30

Temporal Extent: 2007-11-18 - 2007-12-11

Project:

Cobalt, Iron and Micro-organisms from the Upwelling zone to the Gyre (GAc01) (CoFeMUG)

Program:

Ocean Carbon and Biogeochemistry (OCB)

U.S. GEOTRACES (U.S. GEOTRACES)

Principal Investigator:

Mak A. Saito (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Mathew Biddle (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-07-29

Restricted:

Validated:

Current State:

Data not available

Combined CTD profiles for two CTD sensor packages on R/V Knorr KN192-05 from November to December 2007

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Description

Three transects were sampled using the Trace Metal Rosette (TMR) on the CoFeMUG cruise aboard R/V Knorr in 2007. This dataset contains the combined two CTD sensor packages deployed during the transect. Refer to Noble et al. (2012) for detailed information on acquisition and processing.

Related Publications:
Noble, A.E, C. H. Lamborg, D. C. Ohnemus, P. J. Lam, T. J. Goepfert, C. I. Measures, C. H. Frame, K. L. Casciotti, G. R. DiTullio, J. Jennings, M. A. Saito. 2012. Basin-scale inputs of cobalt, iron, and manganese from the Benguela-Angola front to the South Atlantic Ocean. Limnology and Oceanography, 57(4) 989-1010. doi:10.4319/lo.2012.57.4.0989

Sohm, J. A., J. A. Hilton, A. E. Noble, J. P. Zehr, M. A. Saito, and E. A. Webb. 2011. Nitrogen fixation in the South Atlantic Gyre and the Benguela Upwelling System. Geophys. Res. Letters. 38: L16608, doi:10.1029/2011GL048315

Methods & Sampling

CTD: Two CTD packages were employed on KN-192-5, the Knorr's Seabird 911+ CTD package and the science party's Seabird-19 sensor package. The Seabird-19 was deployed on the science party's trace metal rosette for the deep casts to ~5000m, while the ship's CTD was deployed to 800m for upper water casts. The two packages were needed due to wire time constraints, as there was insufficient time to send both rosettes deep at each station. Oxygen data for the two CTD were calibrated with shipboard winkler titrations as described in Noble et al. Limnol. Oceanogr. 2012. The Seabird-19 was calibrated in the factory immediately prior to the cruise.

Data Processing Description

BCO-DMO Processing Notes:
-Modified original parameter names to conform with BCO-DMO naming conventions;
-Missing values (blank) were replaced with 'nd' to indicate 'no data'.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0452883

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KN192-05	GAc01 CoFeMUG KN192-5	2007-11-16	R/V Knorr	Mak A. Saito (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: Seabird 911+ CTD

Supplied Description:

the Knorr's Seabird 911+ CTD package was deployed to 800m for upper water casts

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

CTD Sea-Bird SEACAT 19

Supplied Name: Seabird-19

Supplied Description:

The Seabird-19 was deployed on the science party's trace metal rosette for the deep casts to ~5000m.

Instrument Type

Generic Name: CTD Sea-Bird SEACAT 19

Acronym: CTD SBE 19

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0042/

Generic Description:

The Sea-Bird SBE 19 SEACAT Recorder measures conductivity, temperature, and pressure (depth). The SEACAT is self-powered and self-contained and can be deployed in profiling or moored mode. The SBE 19 SEACAT was replaced in 2001 by the 19plus. more information from Sea-Bird Electronics

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
lon	longitude; East is positive; West is negative	decimal degrees	lon
lat	latitude; North is positive; South is negative	decimal degrees	lat
Potemp090C	potential temperature	degrees C	no_bcodmo_term
pot_dens	sigma-e00 sigma-theta potential density	kilograms per cubic meter (kg/m^3)	no_bcodmo_term
depth_w	water depth	meters (m)	depth_w
depth	Sample depth	meters (m)	depth
Cpar	Cosine Photosynthetically Available Radiation	microEinsteins/meter^2/second	par_cosine
Spar	Surficial Photosynthetically Available Radiation	microEinsteins/meter^2/second	SPAR
Par	Photosynthetically Available Radiation	microEinsteins/meter^2/second	PAR
O2	dissolved oxygen concentration	micromole per kilogram (umol/kg)	O2
fluor	FlECO-AFL fluorescence	miligrams per cubic meter (mg/m^3)	fluor
Sal00	salinity	parts per thousand	no_bcodmo_term
cond	conductivity	Seimens per meter (S/m)	cond
cruise_id	Ship's cruise designation	unitless	cruise_id
Station	Station number	unitless	sta
Type	Type of cast	unitless	no_bcodmo_term
mon_day_yr	date; reported in GMT as MM-DD-YYYY	unitless	date
hh_mm	time of day; reported in GMT as hhmm	unitless	time
Xmiss	transmissivity	unknown	trans_v
ISO_DateTime	date and time in UTC of CTD cast in ISO-8601 format	yyyy-MM-dd'T'HH:mm:ss	ISO_DateTime_UTC

Database

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Dataset: combined CTD