Dataset: CTD bottle data from RR2201

Name: CTD bottle data collected from R/V Roger Revelle cruise RR2201 in the Argo Basin in the Indian Ocean from February to March of 2022
Published: 2025-02-10
Keywords: discrete samples, bottle file, oceans

View Data: Data not available yet

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Spatial Extent: N:-15.33272 E:118.14802 S:-17.18238 W:114.13506

Northwest Australia, Argo Basin, 11-17°S, 114-124°E, depth 5000m

Temporal Extent: 2022-02-03 - 2022-03-03

Project:

Collaborative Research: Mesoscale variability in nitrogen sources and food-web dynamics supporting larval southern bluefin tuna in the eastern Indian Ocean (BLOOFINZ-IO)

Program:

Second International Indian Ocean Expedition (IIOE-2)

Co-Principal Investigator:

Thomas Kelly (Florida State University, FSU)

Sven A. Kranz (Florida State University, FSU)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2025-02-10

Restricted:

Validated:

Current State:

Data not available

CTD bottle data collected from R/V Roger Revelle cruise RR2201 in the Argo Basin in the Indian Ocean from February to March of 2022

Abstract:

This dataset contains a compilation of CTD bottle sensor values from theR/V Roger Revelle's Indian Ocean cruise RR2201. Data were compiled after export from SBE Processing Tools in R, QA/QC'd based on downcast profiles. All sensors used provided calibration coefficients except for fluorescence, which was calibrated based on in situ chlorophyll-a extractions.

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Description

See the section "Related Datasets" on this page for related data from the same CTD casts. The resulting bottle files were then compiled for bulk QA/QC in tandem with a compiled downcast data file (see associated dataset "CTD downcast from RR2201").

Methods & Sampling

This dataset contains a compilation of CTD bottle data from the R/V Roger Revelle's Indian Ocean cruise RR2201. Raw HEX files were first converted and surface soak removed. The resulting bottle files were then compiled for bulk QA/QC in tandem with a compiled downcast data file (see "Related Datasets" section on this page for associated dataset "CTD downcast from RR2201").

Primary and secondary sensors for temperature and salinity were compared and found to have no significant discrepancies. Only primary sensors were included in the final dataset.

Fluorescence data were calibrated based on a linear regression between recorded fluorescence and extracted Chlorophyll-a taken from discrete samples throughout the cruise.

All other sensors use calibration coefficients provided and are otherwise unverified.

Problems/Issues

The SBE911+ was configured to average every 20 scans before transmitting yielding a major reduction in profile resolution. No major instrumental failures were noted.

Data Processing Description

All data was processed through SBE Processing Tools and then compiled, calibrated, and QA/QC'd using R.

BCO-DMO Processing

* Sheet 1 of submitted file "RR2201 CTD Bottle File v1 (2025-01-09T22_47_56).xlsx" was imported into the BCO-DMO data system for this dataset. Table will appear as Data File: 952687_v1_rr2201-bottle-data.csv (along with other download format options).
* Row 2 was skipped and units information included there added to the "Parameters" section of the dataset.
* Values "nd" imported as missing data values.

Missing Data Identifiers:
** In the BCO-DMO data system missing data identifiers are displayed according to the format of data you access. For example, in csv files it will be blank (null) values. In Matlab .mat files it will be NaN values. When viewing data online at BCO-DMO, the missing value will be shown as blank (null) values.

* "Z" added to values in column datetimeUTC to include the time zone in the value. datetime-> datetime with timezone.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1851558
NSF Division of Ocean Sciences	OCE-1851347
NSF Division of Ocean Sciences	OCE-1851381
NSF Division of Ocean Sciences	OCE-1851395
NSF Division of Ocean Sciences	OCE-2404504

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
RR2201	BLOOFINZ-IO	2022-01-20	R/V Roger Revelle	Michael R. Landry (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name:

Supplied Description:

Overall system was an SBE911+ outfitted with the following sensors:

Primary temperature (sn 6140)
Primary conductivity (sn2572)
Pressure cell (sn 0569)
Secondary temperature (sn 4924)
Secondary conductivity (sn 3023)
PAR Sensor (QCP2300-HP 70444)
Fluorometer (SCF-3781)
Altimeter (PSA-1055)
Transmissometer (Wetlabs 1769)
Oxygen Sensor (sn 0848)

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

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

Supplied Name	Supplied description	Supplied Units	Standard Name
datetimeUTC	ISO8601 datetime with timezone (in UTC). Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
cast	Sequential and continuous cast number.	unitless	cast
cruise	Cruise ID.	unitless	cruise_id
transect	Transect identifier.	unitless	transect
event	Unique event identifier used in the cruise event log.	unitless	event
station	Station identifier used in the cruise event log.	unitless	station
longitude	Longitude in degrees east.	decimal degrees	lon
latitude	Latitude in degrees north.	decimal degrees	lat
bottle	Niskin bottle identifier.	unitless	bottle
depth	Calculated depth	meters (m)	depth
pressure	Observed pressure	decibels (db)	press
temperature	Observed temperature	degrees Celsius (degC)	temp
salinity	Calculated salinity according to (TEOS-10; doi: 10.25607/OBP-1338)	Practical Salinity Units (PSU)	sal
density	Calculated in situ density from (TEOS-10; doi: 10.25607/OBP-1338)	kilograms per cubic meter (kg m-3)	density
transmission	Observed beam transmission according to factory calibration.	per meter (m-1)	trans
oxygen	Observed oxygen concentration	micromoles of oxygen per kilogram (umol O2 kg-1)	O2
oxygenSaturation	Calculated oxygen saturation as a ratio based on calculated equilibrium concentration of seawater at the same salinity and potential temperature.	unitless	O2sat
par	Incident irradiance from 400-700 nm collected from a 2Pi sensor attached to the rosette.	micromoles of photons per meter squared per second (umol photons m-2 s-1)	PAR
fluorescence	Calculated chlorophyll-a concentration	milligrams of chlorophyll a per cubic meter (mg chl-a m-3)	fluor

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Dataset: CTD bottle data from RR2201