Dataset: 2017 Wire Flyer Oxygen data

Name: Oxygen data from 12 Wire Flyer deployments conducted on R/V Sikuliaq cruise SKQ201701S in the Eastern Tropical North Pacific from January to February 2017
Published: 2021-09-01
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.859905.1

Spatial Extent: N:22.604527 E:-117.009013 S:21.222495 W:-118.591761

Temporal Extent: 2017-01-25 - 2017-02-12

Project:

Collaborative Research: A metabolic index to predict the consequences of climate change for midwater ecosystems (Metabolic Index)

Principal Investigator:

Christopher Neil Roman (University of Rhode Island, URI)

BCO-DMO Data Manager:

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

Version:

Version Date:

2021-09-01

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Oxygen data from 12 Wire Flyer deployments conducted on R/V Sikuliaq cruise SKQ201701S in the Eastern Tropical North Pacific from January to February 2017

Abstract:

This dataset includes oxygen data from 12 Wire Flyer deployments conducted on R/V Sikuliaq cruise SKQ201701S in the Eastern Tropical North Pacific from January to February 2017.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2021-09-01	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.859905.1	2022-05-03

Methods & Sampling

Data were collected on R/V Sikuliaq cruise SKQ201701S in the Eastern Tropical North Pacific during January and February 2017. The data have not been corrected for any time lags. Oxygen data are from an Aanderaa Optode 4831F. See the accompanying sensor manual (PDF) for the field details.

The Wire Flyer position was calculated using measurements of the clump weight depth and the wire payout. The layback distance is the Flyer’s distance behind the ship. Refer to the Supplemental Files for more information on the Wire Flyer.

Known Problems/Issues:
There is a time lag in the data due to the sensor's foil response. This is noticeable on adjacent profiles, with similar O2 values appearing at different depths. The data can be lag shifted 5-7 seconds to remove most of the offset.

Data Processing Description

BCO-DMO Processing:
- concatenated data from 12 separate files into one dataset;
- replaced "NaN" with "nd" (no data);
- created new column "deployment_id" (based on original file name);
- converted date/time field to ISO8601 format.

Data Files

File
O2_2017.csv (Comma Separated Values (.csv), 61.58 MB) MD5:0ecc7dae80e1083ee946e0ea95790286 Primary data file for dataset ID 859905

Supplemental Files

File
SKQ201701S Wire Flyer Summary Plots filename: summary_plots.zip (ZIP Archive (ZIP), 16.49 MB) MD5:81e1ebe72d60bf253110a9aa93a5fc21 Summary plots of data from 12 Wire Flyer deployments conducted on R/V Sikuliaq cruise SKQ201701S. There is one PDF for each deployment. The file naming convention is YYYYMMDD_HHMMSS, set at the start of the deployment, e.g. 20170125_151748. The times are all in GMT, not local time.
TD 269 OPERATING MANUAL OXYGEN OPTODE 4330, 4835, 4831 filename: TD269v5_Operating_manual_Oxygen_Optode_4330_4835_and_4831.pdf (Portable Document Format (.pdf), 5.72 MB) MD5:7a18b2248d363da076eedb61e2aed965 Operating manual for Aanderaa oxygen optodes 4330, 4835, and 4831.
Wire Flyer Launch and Recover Document filename: flyer_launch_and_recover_document.pdf (Portable Document Format (.pdf), 7.26 MB) MD5:f9274b8c8b003b9a39083191e4f2c76b Document describing the Wire Flyer launch and recovery procedures.
Wire Flyer Overview 2019 filename: Wire_flyer_overview_2019.pdf (Portable Document Format (.pdf), 15.84 MB) MD5:7c3c14f839142f115c5aa467894395d7 Slides from a presentation by Christopher Roman titled "The Wire Flyer vehicle system and high resolution hydrographic sections".

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1458967

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SKQ201701S		2017-01-19	R/V Sikuliaq	Brad Seibel (Chief Scientist)	data info

Instruments

Aanderaa 4831F (fast-response) oxygen optode

Supplied Name: Aanderaa Optode 4831F

Supplied Description:

Oxygen data are from an Aanderaa Optode 4831F.

Instrument Type

Generic Name: Aanderaa 4831F (fast-response) oxygen optode

Acronym: Aanderaa 4831F

Generic Description:

A stand-alone oxygen optode with integrated temperature sensor, manufactured by Aanderaa. This instrument exploits the physio-chemical principle of dynamic fluorescence quenching to measure absolute oxygen concentration and percent saturation. Depth rating: 300 m, 3000 m or 6000 m; oxygen concentration accuracy of < 8 uM or 5 %, and resolution of < 1 uM; air saturation accuracy of < 5 %, and resolution of 0.4 %; response time (63 %): < 8 s.

Wire Flyer Towed Profiling System

Supplied Name: Wire Flyer

Supplied Description:

Instrument Type

Generic Name: Wire Flyer Towed Profiling System

Acronym: Wire Flyer

Generic Description:

Description from Roman et al. (2019):
The Wire Flyer towed vehicle is a platform able to collect high-resolution water column sections. The vehicle is motivated by a desire to effectively capture spatial structures at the submesoscale. The Wire Flyer profiles up and down along a ship-towed cable autonomously using controllable wings for propulsion. At ship speeds between 2 and 5 kt (1.02–2.55 m s−1), the vehicle is able to profile over prescribed depth bands down to 1000 m. The vehicle carries sensors for conductivity, temperature, depth, oxygen, turbidity, chlorophyll, pH, and oxidation reduction potential. During normal operations, the vehicle is typically commanded to cover vertical regions between 300 and 400 m in height with profiles that repeat at kilometer spacing. The vertical profiling speed can be user-specified up to 150 m min−1. During operations, an acoustic modem is used to communicate with the vehicle to provide status information, data samples, and the ability to modify the sampling pattern.

Detailed information can be found in the following publication:
Roman, C., Ullman, D. S., Hebert, D., & Licht, S. (2019). The Wire Flyer Towed Profiling System. Journal of Atmospheric and Oceanic Technology, 36(2), 161–182. doi:10.1175/jtech-d-17-0180.1

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
deployment_id	identifier for the deployment; indicates the start date and time of deployment in format: YYYYMMDD_hhmmss (time zone is GMT)	unitless	deployno
AirSaturation	air saturation (%) relative to the nominal air pressure	unitless (percent)	no_bcodmo_term
C2Amp	amplitude measurement with red excitation light	millivolts (mV)	no_bcodmo_term
Temperature	temperature	degrees Celsius	temp
C2RPh	phase measurement with red excitation light	degrees	no_bcodmo_term
TCPhase	temperature compensated phase	degrees	no_bcodmo_term
timestamp	time stamp in microunix seconds	microunix seconds	time
C1RPh	phase measurement with blue excitation light	degrees	no_bcodmo_term
O2Concentration	partial pressure of dissolved oxygen in water	micromoles per liter	no_bcodmo_term
C1Amp	amplitude measurement with blue excitation light	millivolts (mV)	no_bcodmo_term
CalPhase	calibrated phase	degrees	no_bcodmo_term
RawTemp	voltage from thermistor bridge	millivolts (mV)	no_bcodmo_term
datestring	date-time string (GMT) in format where xxx represent milliseconds: YYYY-MM-DD hh:mm:ss.xxx	unitless	DateTime
ISO_DateTime_UTC	date-time string converted to ISO8601 format: YYYY-MM-DDThh:mm:ss.xxxxxxZ. Note that data are accurate to milliseconds (not microseconds) Format: %Y-%m-%dT%H:%M:%S.%fZ	unitless	ISO_DateTime_UTC
lat	Latitude. This is either the ship or the flyer position, but it is the best position available. If the Flyer position was known, accounting for the tow cable, this is the value used here. If the flyer position was not known (e.g. maybe the winch cable counter failed), the ship position was recorded.	degrees North	lat
lon	Longitude. This is either the ship or the flyer position, but it is the best position available. If the Flyer position was known, accounting for the tow cable, this is the value used here. If the flyer position was not known (e.g. maybe the winch cable counter failed), the ship position was recorded	degrees East	lon

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Dataset: 2017 Wire Flyer Oxygen data