Dataset: PE22-03 Binned CTD

Name: Processed CTD data (binned) from 24 casts conducted on R/V Pelican cruise PE22-03 in the Northern Gulf of Mexico in August 2021
Published: 2023-07-06
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.879704.1

Spatial Extent: N:29.71696 E:-87.68239 S:27.69985 W:-94.58739

Temporal Extent: 2021-08-03 - 2021-08-07

Project:

CAREER: Investigating aerobic microbial respiration dynamics in coastal hypoxia (Coastal O2 Respir)

Principal Investigator:

J. Cameron Thrash (University of Southern California, USC)

BCO-DMO Data Manager:

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

Version:

Version Date:

2023-07-06

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Processed CTD data (binned) from 24 casts conducted on R/V Pelican cruise PE22-03 in the Northern Gulf of Mexico in August 2021

Abstract:

This dataset includes the processed CTD data from 24 casts conducted on R/V Pelican cruise PE22-03 in the Northern Gulf of Mexico in August 2021. Data were averaged into bins of 0.25 meters.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2023-07-06	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.879704.1	2023-07-06

Methods & Sampling

Sampling was conducted on R/V Pelican cruise PE22-03 in the Northern Gulf of Mexico in August 2021. All CTD casts were conducted according to standard ship operator procedure.

The data were collected using a SeaBird 911 plus system with twelve 12-liter Niskin bottles. The instruments included in the 911 plus suite are dual Temperature (SBE 3), dual Conductivity (SBE 4), and dual Oxygen (SBE 43) sensors. Additionally, the suite included an SBE 27 pH/Oxidation, Chelsea Aquatracka 3 Chl-a, and a Wetlabs CDOM sensor. Serial numbers and calibration information is stored in the Header Information included in the .cnv files (see Supplemental Files).

Data Processing Description

Data Processing:
The data were processed using Seabird's SBEDataProccessing_Win32 software. The data were converted from hexadecimal to engineering units first. Using the software's Bin Averaging tool, it was also averaged in bins of 0.25 meters. The attached Supplemental File, "PE22-03_Seabird_CTD_File_Header.txt", contains the complete Seabird header from one cast (C6C_2).

For the unbinned data, see the related dataset https://www.bco-dmo.org/dataset/879930.

BCO-DMO Processing:
- captured starting latitude, starting longitude, and starting date/time from the Seabird headers as columns;
- replaced "-9.990e-29" with "nd" (no data);
- concatenated separate files (one per cast) into one dataset;
- converted starting latitude and longitude to decimal degrees (rounded to 5 decimal places);
- converted starting date/time to ISO8601 format;
- created Cast column based on the original file name;
- removed three rows of data where CTD recording started too early resulting in unusually low data values;
- renamed fields to comply with BCO-DMO parameter naming conventions.

Data Files

File
binned_ctd_all.csv (Comma Separated Values (.csv), 524.42 KB) MD5:0766e5c365c4a1055cfc40486d5f4960 Primary data file for dataset ID 879704.

Supplemental Files

File
PE22-03_Seabird_CTD_File_Header.txt (Octet Stream, 12.21 KB) MD5:ac2079ec2a802f63b0cc18c61a5af7f1 Seabird CTD file header from a binned PE22-03 .cnv file.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1945279

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
PE22-03	Microbial DO respir	2021-08-03	R/V Pelican	J. Cameron Thrash (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: SeaBird 911 plus system

Supplied Description:

SeaBird 911 plus system with twelve 12-liter Niskin bottles

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

Fluorometer

Supplied Name: Wetlabs CDOM

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Fluorometer

Supplied Name: Chelsea Aquatracka 3 Chl-a

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

Niskin bottle

Supplied Name: 12-liter Niskin bottles

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Sea-Bird SBE 27 pH/O.R.P. sensor

Supplied Name: SBE 27 pH/Oxidation

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 27 pH/O.R.P. sensor

Acronym: SBE 27 pH/Oxidation sensor

Generic Description:

The SBE 27 pH and O.R.P. (Redox) sensor combines a pressure-balanced, glass-electrode, Ag/AgCl reference probe and platinum O.R.P. electrode to provide in-situ measurements at depths to 1200 m. The replaceable pH probe is permanently sealed and is supplied with a soaker bottle attachment that prevents the reference electrode from drying out during storage. The SBE 27 is intended for use as an add-on auxiliary sensor for profiling CTDs (SBE 9plus; SBE 19, 19plus, and 19plus V2 SeaCAT; and SBE 25 and 25plus Sealogger).

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: dual Oxygen (SBE 43) sensors

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

Sea-Bird SBE-3 Temperature Sensor

Supplied Name: dual Temperature (SBE 3) sensors

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE-3 Temperature Sensor

Acronym: SBE-3 Temperature

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The SBE-3 is a slow response, frequency output temperature sensor manufactured by Sea-Bird Electronics, Inc. (Bellevue, Washington, USA). It has an initial accuracy of +/- 0.001 degrees Celsius with a stability of +/- 0.002 degrees Celsius per year and measures seawater temperature in the range of -5.0 to +35 degrees Celsius. more information from Sea-Bird Electronics

Sea-Bird SBE-4 Conductivity Sensor

Supplied Name: dual Conductivity (SBE 4) sensors

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE-4 Conductivity Sensor

Acronym: SBE-4 Conductivity

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0417/

Generic Description:

The Sea-Bird SBE-4 conductivity sensor is a modular, self-contained instrument that measures conductivity from 0 to 7 Siemens/meter. The sensors (Version 2; S/N 2000 and higher) have electrically isolated power circuits and optically coupled outputs to eliminate any possibility of noise and corrosion caused by ground loops. The sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Because the outer electrodes are connected together, electric fields are confined inside the cell, making the measured resistance (and instrument calibration) independent of calibration bath size or proximity to protective cages or other objects.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cast	Cast identifier	unitless	cast
Lat_Start	Latitude at start of cast	degrees North	lat
Lon_Start	Longitude at start of cast	degrees East	lon
ISO_DateTime_Start_UTC	Date and time (UTC) at start of cast in ISO8601 format: YYYY-MM-DDThh:mm:ssZ Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
latitude	Latitude	degrees North	lat
longitude	Longitude	degrees East	lon
depSM	Depth	meters (m)	depth
t090C	Temperature [ITS-90]	degrees Celsius	temp
t190C	Temperature, 2 [ITS-90]	degrees Celsius	temp
c0mS_cm	Conductivity	millSiemens per centimeter (mS/cm)	cond
c1mS_cm	Conductivity, 2	millSiemens per centimeter (mS/cm)	cond
sal00	Practical salinity	PSU	sal
sal11	Practical salinity, 2	PSU	sal
sbeox0Mg_L	Oxygen, SBE 43	milligrams per liter (mg/L)	O2
sbeox1Mg_L	Oxygen, SBE 43, 2	milligrams per liter (mg/L)	O2
flC	Fluorescence, Chelsea Aqua 3 Chl Con	micrograms per liter (ug/L)	fluor
ph	pH	unitless	pH
orp	Oxidation Reduction Potential	millivolts (mV)	Ox_Red
wetCDOM	Fluorescence, WET Labs CDOM	milligrams per cubic meter (mg/m^3)	fluor
flag	Flag	unitless	q_flag

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Database

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Dataset: PE22-03 Binned CTD