Dataset: NBP1201 CTD Profiles

Name: CTD profile casts collected on the RVIB Nathaniel B. Palmer cruise NBP1201 in the Ross Sea from December 2011 to February 2012
Published: 2024-08-28
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.933216.1

Spatial Extent: N:-64.237 E:-98.505 S:-77.796 W:164.25

Ross Sea

Temporal Extent: 2011-12-31 - 2012-02-05

Project:

Processes Regulating Iron Supply at the Mesoscale - Ross Sea (PRISM-RS)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Integrated Marine Biogeochemistry and Ecosystem Research -US (IMBER-US)

Principal Investigator:

Dennis J. McGillicuddy (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Thomas Bibby (University of Southampton)

Michael Dinniman (Old Dominion University, ODU)

Blair Greenan (Bedford Institute of Oceanography, BIO)

Eileen E. Hofmann (Old Dominion University, ODU)

John M. Klinck (Old Dominion University, ODU)

Peter N. Sedwick (Old Dominion University, ODU)

Walker O. Smith (Virginia Institute of Marine Science, VIMS)

Contact:

Olga Kosnyrev (Woods Hole Oceanographic Institution, WHOI)

Dennis J. McGillicuddy (Woods Hole Oceanographic Institution, WHOI)

Data Manager:

Olga Kosnyrev (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Version:

Version Date:

2024-08-28

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD profile casts collected on the RVIB Nathaniel B. Palmer cruise NBP1201 in the Ross Sea from December 2011 to February 2012

Abstract:

This dataset of CTD profile casts was collected on the RVIB Nathaniel B. Palmer, cruise ID NBP1201, in the Antarctic. The cruise took place from December 24, 2011 to February 10, 2012, and was conducted as part of the PRISM-RC project, "Processes Regulating Iron Supply at the Mesoscale - Ross Sea".

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2024-08-28	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.933216.1	2024-08-28

Methods & Sampling

Standard station CTD profiles were conducted (down casts) with water sampling conducted during the up casts.

This dataset is comprised of the down cast data from station numbers 1-118, except for stations #2 and #100 in which the down casts failed, and thus the upcast data are included instead. Note the CTD fluorescence and oxygen data have not been adjusted using the bottle data for chlorophyll and oxygen as a calibration in the final CTD data.

Please disregard station #51 primary oxygen profiles - both voltage and ml/L measurements. This was a single cast test comparison, and measurements were taken from another sensor.

Problems/Issues

Bad data are indicated by a value of -9.990e-29. Station 51 primary oxygen measurements (both voltage and ml/L measurements) failed and have been replaced with the bad data flag.

Data Processing Description

Data were processed using the Sea-Bird Software SBE Data Processing, version 7.21k. Data acquisition used SBE Seasave, version 7.14e.

BCO-DMO Processing

- Converted the orignal file "nbp1201_ctd_list.txt" from tab-separated to comma-separated; saved as "nbp1201_ctd_list.csv".
- Imported file "nbp1201_ctd_list.csv" into the BCO-DMO system.
- Imported the original .cnv files (one per CTD cast; 120 total) into the BCO-DMO system.
- Concatenated the cast files into a single data file.
- Created columns for cruise_id and station number.
- Changed station 4.2 to 4a in the cast list.
- Joined the cast data to the "nbp1201_ctd_list" file by matching on station number.
- Renamed fields to comply with BCO-DMO naming conventions.
- Created date-time field in ISO 8601 format.
- Sorted data by station number.
- Added "down_or_up" column to indicate direction of cast.
- Replaced values at station 51 in the sbeox0V (raw primary O2) and sbeox0ML_L (dissolved primary O2) columns with the bad data flag "-9.990e-29".
- Saved the final file as "933216_v1_nbp1201_ctd.csv".

Data Files

File
933216_v1_nbp1201_ctd.csv (Comma Separated Values (.csv), 17.96 MB) MD5:dcf7408b6b402a162adba43963e3e407 Primary data file for dataset ID 933216, version 1

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Antarctic Sciences	ANT-0944165

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
NBP1201		2011-12-24	RVIB Nathaniel B. Palmer	Dennis J. McGillicuddy (Chief Scientist)	data info

Instruments

Biospherical PAR sensor

Supplied Name: LI-COR Biospherical SPAR Sensor

Supplied Description:

The LI-COR Biospherical SPAR Sensor is used to measure Surface Photosynthetically Available Radiation (SPAR).

Instrument Type

Generic Name: Biospherical PAR sensor

Generic Description:

An irradiance sensor designed to measure Photosynthetically Active Radiation (PAR), manufactured by Biospherical Instruments Inc.

CTD Sea-Bird SBE 911plus

Supplied Name: CTD Sea-Bird 911

Supplied Description:

SeaBird 911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors At each station, CTD casts measured temperature, salinity and PAR. Water samples collected at depths of 500, 300, 250, 200, 150, 120, 100, 80, 60, 40, 30, 20, 10 m, and the surface were filtered, processed or preserved for further analysis.

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

LI-COR Biospherical PAR Sensor

Supplied Description:

Instrument Type

Generic Name: LI-COR Biospherical PAR Sensor

Acronym: LI-COR Biospherical PAR

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0074/

Generic Description:

The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.

Pressure Sensor

Supplied Name: Pressure, Digiquartz with TC

Supplied Description:

Instrument Type

Generic Name: Pressure Sensor

Generic Description:

A pressure sensor is a device used to measure absolute, differential, or gauge pressures. It is used only when detailed instrument documentation is not available.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43 Dissolved Oxygen

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic Description:

The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Wet Labs ECO-AFL/FL Fluorometer

Supplied Description:

Instrument Type

Generic Name: Wet Labs ECO-AFL/FL Fluorometer

Acronym: ECO AFL/FL

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0172/

Generic Description:

The Environmental Characterization Optics (ECO) series of single channel fluorometers delivers both high resolution and wide ranges across the entire line of parameters using 14 bit digital processing. The ECO series excels in biological monitoring and dye trace studies. The potted optics block results in long term stability of the instrument and the optional anti-biofouling technology delivers truly long term field measurements.
more information from Wet Labs

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise ID number	unitless	cruise_id
station	Station number	unitless	station
ISO_DateTime_UTC	Date and time (UTC) in ISO 8601 format Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
year	NMEA UTC year	unitless	year
month	NMEA UTC month	unitless	month
day	NMEA UTC day	unitless	day
hour	NMEA UTC hour	unitless	hour_gmt
minute	NMEA UTC minute	unitless	minute_gmt
second	NMEA UTC second	unitless	seconds_gmt
latitude	NMEA latitude; negative values = South	decimal degrees	lat
longitude	NMEA longitude; negative values = West	decimal degrees	lon
timeS	Elapsed time	seconds	time_elapsed
prDM	Pressure, Digiquartz	decibars (db)	press
t090C	Temperature from primary sensor, ITS-90	degrees Celsius	temp
t190C	Temperature from secondary sensor, ITS-90	degrees Celsius	temp
c0S_m	Conductivity from primary sensor	siemens per meter (S/m)	cond
c1S_m	Conductivity from secondary sensor	siemens per meter (S/m)	cond
flECO_AFL	Fluorescence, WET Labs ECO-AFL/FL	milligrams per cubic meter (mg/m^3)	fluor
xmiss	Percent Beam Transmission, Chelsea/Seatech	unitless (percent)	trans
altM	Altimeter	meters (m)	altitude
par	PAR/Irradiance, Biospherical/Licor	microEinsteins per square meter per second (uE/m^2/s)	PAR
cpar	CPAR/Corrected Irradiance (%)	unitless (percent)	CPAR
spar	SPAR/Surface Irradiance	microEinsteins per square meter per second (uE/m^2/s)	SPAR
sbeox0V	Oxygen raw from primary sensors, SBE 43	volts (V)	O2_v
sbeox1V	Oxygen raw from secondary sensors, SBE 43	volts (V)	O2_v
potemp090C	Potential temperature from primary sensors, ITS-90	degrees Celsius	potemp
potemp190C	Potential temperature from secondary sensors, ITS-90	degrees Celsius	potemp
sbeox0ML_L	Dissolved oxygen concentration from primary sensor, SBE 43	milliliters per liter (mL/L)	O2
sbeox1ML_L	Dissolved oxygen concentration from secondary sensor, SBE 43	milliliters per liter (mL/L)	O2
sal00	Practical salinity, from primary sensors	PSU	sal
sal11	Practical salinity, from secondary sensors	PSU	sal
sigma_e00	Sigma-theta density from primary sensors	kilograms per cubic meter (kg/m^3)	sigma_0
sigma_e11	Sigma-theta density from secondary sensors	kilograms per cubic meter (kg/m^3)	sigma_0
flag	Bad data flag (-9.990e-29)	unitless	q_flag
cnv_file_name	Original name of .cnv file	unitless	file_name
down_or_up	Indicates if the data are from an upcast or downcast of the CTD. (During stations 2 and 100, the downcasts failed, and thus the upcast data are included instead.)	unitless	cast_type