Dataset: CTD and underwater mass spectrometer data

Name: CTD and underwater mass spectrometer (SWIMS) data acquired between 2016 and 2017 aboard the RV/Endeavor (cruise EN575 and EN602) in the the subtropical Atlantic using a Triaxus tow vehicle.
Published: 2020-11-12
Keywords: O2/Ar, triaxus, SWIMS, underwater mass spectrometer, photic zone gases, oceans

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Temporal Extent: 2016-03-07 - 2017-07-18

Project:

Collaborative Research: Inventories of Primary Productivity by In-situ Mass Spectrometry in the Upper Ocean (ZIPP)

Principal Investigator:

Brice Loose (University of Rhode Island, URI)

Co-Principal Investigator:

R. Timothy Short (SRI International, SRI)

Contact:

Brice Loose (University of Rhode Island, URI)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-11-12

Restricted:

Validated:

Current State:

Preliminary and in progress

CTD and underwater mass spectrometer (SWIMS) data acquired between 2016 and 2017 aboard the RV/Endeavor (cruise EN575 and EN602) in the the subtropical Atlantic using a Triaxus tow vehicle.

Abstract:

CTD and underwater mass spectrometer(SWIMS) data acquired between 2016 and 2017 aboard the RV/Endeavor (cruise EN575 and EN602) in the the subtropical Atlantic using a Triaxus tow vehicle (ZIPP project).

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Acquisition Description

The ocean data set was collected along a dynamic section of the subtropical Atlantic. The quadrupole mass analyzer (QMS) was incorporated into a Submersible Wet Inlet Mass Spectrometer (SWIMS), which is capable of in-situ gas analysis to a water depth of 2000 m. In this application we towed the mass-spectrometer through water depths from 0 to 150 m aboard a Triaxus tow vehicle, corresponding to region where sunlight penetrates the surface ocean. The SWIMS position can be visualized by the gray saw-tooth pattern. The SWIMS was being used to measure oxygen, argon, carbon dioxide, nitrogen and methane in the surface ocean. Each of these dissolved gases has significance for biology and geochemistry of the ocean.

Processing Description

Data from Triaxus CTD and SWIMS was merged in real time.

Post-processing includes:

Introduction of a 20 second lag between CTD and SWIMS data, because SWIMS measurements pass through a rubber tube with 20 second travel time.
Wild_edit Seabird-like removal of values that fall outside 5 standard deviations of the mean.
Linear interpolation across data gaps.
SWIMS ion currents have not been calibrated. These require a special calibration to account for pressure effects. The method is still under peer review.

BCO-DMO Processing Notes:

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1429940

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN575		2016-03-03	R/V Endeavor	Brice Loose (Chief Scientist)	data info
EN602		2017-07-07	R/V Endeavor	Brice Loose (Chief Scientist)	data info

Instruments

CTD Sea-Bird MicroCAT 37

Supplied Name: SBE 37

Supplied Description:

Triaxus tow vehicle from U. Of Minnesota, Duluth, equipped with SBE 37, SBE43, and Wetlabs ECOpuck.

Instrument Type

Generic Name: CTD Sea-Bird MicroCAT 37

Acronym: CTD MicroCAT 37

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/350/

Generic Description:

The Sea-Bird MicroCAT CTD unit is a high-accuracy conductivity and temperature recorder based on the Sea-Bird SBE 37 MicroCAT series of products. It can be configured with optional pressure sensor, internal batteries, memory, built-in Inductive Modem, integral Pump, and/or SBE-43 Integrated Dissolved Oxygen sensor. Constructed of titanium and other non-corroding materials for long life with minimal maintenance, the MicroCAT is designed for long duration on moorings.

In a typical mooring, a modem module housed in the buoy communicates with underwater instruments and is interfaced to a computer or data logger via serial port. The computer or data logger is programmed to poll each instrument on the mooring for its data, and send the data to a telemetry transmitter (satellite link, cell phone, RF modem, etc.). The MicroCAT saves data in memory for upload after recovery, providing a data backup if real-time telemetry is interrupted.

Membrane Inlet Mass Spectrometer

Supplied Name: SWIMS

Supplied Description:

SWIMS: Submersible Wet Inlet Mass Spectrometer is a membrane inlet mass spectrometer that is submersible to 2000 m and samples every 2 seconds for pre-chosen masses.

Instrument Type

Generic Name: Membrane Inlet Mass Spectrometer

Acronym: MIMS

Generic Description:

Membrane-introduction mass spectrometry (MIMS) is a method of introducing analytes into the mass spectrometer's vacuum chamber via a semipermeable membrane.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE43

Supplied Description:

 Triaxus tow vehicle from U. Of Minnesota, Duluth, equipped with SBE 37, SBE43, and Wetlabs ECOpuck.

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

towed undulating vehicle

Supplied Name: Triaxus Tow Vehicle

Supplied Description:

Triaxus tow vehicle from U. Of Minnesota, Duluth

Instrument Type

Generic Name: towed undulating vehicle

Acronym: TUV

Generic Description:

A towed undulating vehicle is a generic class of instruments. See the data set specific information for a detailed description. These are often prototype instrument packages designed to make very specific measurements.

Wet Labs ECO Puck

Supplied Name: Wetlabs ECOpuck

Supplied Description:

Triaxus tow vehicle from U. Of Minnesota, Duluth, equipped with SBE 37, SBE43, and Wetlabs ECOpuck.

Instrument Type

Generic Name: Wet Labs ECO Puck

Generic Description:

The Puck is a miniature version of the ECO series of sensors, specifically designed for use in AUVs, profiling floats, and Slocum gliders with a dry science bay. This compact optical sensor is available in combinations of backscattering and fluorescence measurements.
Manufacturer's website: https://www.seabird.com/auv-rov-sensors/eco-puck/family?productCategoryId=55352274651

Parameters

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Database

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Dataset: CTD and underwater mass spectrometer data