Dataset: 3OEC-instrument Current Flow

Name: Current flow, pressure, and oxygen concentrations recorded by the 3OEC-instrument in the Florida Keys from 11-17 July 2017
Published: 2021-04-21
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.849934.1

Spatial Extent: N:24.7253 E:-80.83083 S:24.7253 W:-80.83083

Temporal Extent: 2017-07-11 - 2017-07-17

Project:

Collaborative Research: Robust optode-based eddy correlation systems for oxygen flux measurements in aquatic environments (Robust optode-based eddy correlation systems)

Principal Investigator:

Markus Huettel (Florida State University EOAS, FSU - EOAS)

Co-Principal Investigator:

Peter Berg (University of Virginia, UVA)

Contact:

Markus Huettel (Florida State University EOAS, FSU - EOAS)

BCO-DMO Data Manager:

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

Version:

Version Date:

2021-04-21

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Current flow, pressure, and oxygen concentrations recorded by the 3OEC-instrument in the Florida Keys from 11-17 July 2017

Abstract:

This dataset presents the velocity and external sensor data recorded by the Nortek Vector ADV logger. The eddy covariance instrument was deployed July 11-17, 2017 in a subtropical inner shelf environment (Salinity: 35-36, temperature: 28-31°C) approximately 9 km south of Long Key in the Florida Keys (24° 43.52'N, 80° 49.85'W). The site was located at 9 ± 1 m water depth near the center of a large flat carbonate platform covered with coral sand. The measuring volume of the ADV was adjusted to be ~35 cm above the sediment-water interface.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2021-04-21	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.849934.1	2021-04-23

Methods & Sampling

The Nortek Vector ADV logger was deployed July 11-17, 2017 in a subtropical inner shelf environment (Salinity: 35-36, temperature: 28-31°C) approximately 9 km south of Long Key in the Florida Keys (24° 43.52'N, 80° 49.85'W). The site was located at 9 ± 1 m water depth near the center of a large flat carbonate platform covered with coral sand. The measuring volume of the ADV was adjusted to be ~35 cm above the sediment-water interface.

The velocity data are unprocessed raw data as recorded by the Nortek Vector ADV using the following settings.
Sampling rate: 64 Hz, down-averaged to 8Hz
Nominal velocity range: 0.30 m/s
Burst interval: CONTINUOUS
Samples per burst: N/A
Sampling volume: 14.9 mm
Measurement load: 59 %
Transmit length: 4.0 mm
Receive length: 0.01 m
Number of beams: 3
Software version: 1.37.02

Measurements and data analysis are reported in Huettel et al. (2020).

Known Problems:
Deployment 11-12 July: Measurements could not start before 14:00 due to bad weather preventing earlier deployment.

Data Processing Description

Data Processing:
Vector 1.39.06 (Nortek) software (for downloading the data from the Nortek Vector ADV)
ORIGIN 2017, Origin labs (for converting Vector data files into .csv files)

BCO-DMO Processing:
- renamed fields to comply with BCO-DMO naming conventions;
- concatenated separate files from each deployment into one dataset; added the 'deployment' column.

Data Files

File
3OEC_current_flow.csv (Comma Separated Values (.csv), 202.88 MB) MD5:3a6c75ebec89337c60d80a6ab85f4115 Primary data file for dataset ID 849934

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1334117
NSF Division of Ocean Sciences	OCE-1334848

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Diodon_2017-07-11-12	3OEC Deployment 1	2017-07-11	R/V Diodon	Markus Huettel (Chief Scientist)	data info
Diodon_2017-07-13-14	3OEC Deployment 2	2017-07-13	R/V Diodon	Markus Huettel (Chief Scientist)	data info
Diodon_2017-07-15-16	3OEC Deployment 3	2017-07-15	R/V Diodon	Markus Huettel (Chief Scientist)	data info
Diodon_2017-07-16-17	3OEC Deployment 4	2017-07-16	R/V Diodon	Markus Huettel (Chief Scientist)	data info

Instruments

Acoustic Doppler Velocimeter

Supplied Name: Nortek Vector ADV

Supplied Description:

Flow measurements used an Acoustic Doppler Velocimeter (Vector, Nortek); Serial number VEC 1436; Calibrations: The Nortek Vector ADV was factory-calibrated prior to the deployments.

Accuracy: ± 0.5% of measured value ±1 mm/s
Velocity precision: typ. 1% of velocity range (at 16 Hz)

Instrument Type

Generic Name: Acoustic Doppler Velocimeter

Acronym: ADV

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/384/

Generic Description:

ADV is the acronym for acoustic doppler velocimeter. The ADV is a remote-sensing, three-dimensional velocity sensor. Its operation is based on the Doppler shift effect. The sensor can be deployed either as a moored instrument or attached to a still structure near the seabed.

Reference:
G. Voulgaris and J. H. Trowbridge, 1998. Evaluation of the Acoustic Doppler Velocimeter (ADV) for Turbulence Measurements. J. Atmos. Oceanic Technol., 15, 272–289. doi: http://dx.doi.org/10.1175/1520-0426(1998)015<0272:EOTADV>2.0.CO;2

Oxygen Sensor

Supplied Name: Pyrosience oxygen sensors

Supplied Description:

The Pyrosience oxygen sensors were pre- and post calibrated using air saturated seawater (100% air saturation) and seawater with addition of sodium sulfite (0% air saturation).

Oxygen sensor (Pyroscience) Accuracy:
at 5% a.s./0.44 mg/L ±0.1% a.s. ±0.01 mg/L
at 95% a.s./8.8 mg/L ±1% a.s. ±0.1 mg/L

Resolution:
at 5% a.s./0.44 mg/L 0.05% a.s. 0.005 mg/L
at 95% a.s./8.8 mg/L 0.25% a.s. 0.025 mg/L

Detection Limit: 0.1% a.s. 0.01 mg/L

Instrument Type

Generic Name: Oxygen Sensor

Acronym: Dissolved Oxygen Sensor

Generic Description:

An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
deployment	Name of original data file; date range of the deployment (YYYY MM Day_Start Day_End)	unitless	deploy
t	Time	hours	time_elapsed
t_increase	Time increase	seconds	time_elapsed
Vx	Velocity x	centimeters per second (cm s-1)	no_bcodmo_term
Vy	Velocity y	centimeters per second (cm s-1)	no_bcodmo_term
Vz	Velocity z	centimeters per second (cm s-1)	no_bcodmo_term
P	Pressure	kilopascals (kPa)	P
O2_S1	Oxygen concentration	micromoles per liter (umol l-1)	O2
O2_S2	Oxygen concentration	micromoles per liter (umol l-1)	O2
O2_S3	Oxygen concentration	micromoles per liter (umol l-1)	O2

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Database

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Dataset: 3OEC-instrument Current Flow