| Contributors | Affiliation | Role |
|---|---|---|
| Huettel, Markus | Florida State University (FSU - EOAS) | Principal Investigator |
| Berg, Peter | University of Virginia (UVA) | Co-Principal Investigator |
| Biddle, Mathew | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Velocity and external sensor data recorded by the Nortek Vector ADV logger.
The eddy covariance instrument was deployed August 16-17, 2013 in a subtropical inner shelf environment (Salinity: 35-36, temperature: 30° ± 0.5°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 data are unprocessed raw data as recorded by the Nortek Vector ADV using the following settings:
Sampling rate 64 Hz
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
Output sync VECTOR
Analog output DISABLED
Analog input 1 FAST
Analog input 2 FAST
Power output DISABLED
Output format VECTOR
Velocity scaling 0.1 mm
IMU mode OFF
IMU data type AHRSCC
Powerlevel HIGH
Coordinate system XYZ
Sound speed MEASURED
Salinity 35.0 ppt
Distance between pings 1.01 m
Number of beams 3
Software version 1.37.02
The analysis of the data and their interpretation are reported in the submitted paper:
Technical note: Measurements and data analysis of sediment-water oxygen flux using a new dual-optode eddy covariance instrument by Markus Huettel, Peter Berg and Alireza Merikhi
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 .cvs files)
BCO-DMO Processing Notes:
- Served raw data files.
| File |
|---|
130814_Huettel filename: 130814_Huettel.dat (Octet Stream, 784.98 MB) MD5:d09c18ea860ffa20bc39503a9f2d2505 Current flow and oxygen concentrations recorded by the 2OEC-instrument from August 14-15, 2013.
Time of first measurement 14 Aug. 2013, 10:30:00
Time of last measurement 15 Aug. 2013, 14:14:58
Number of measurements 6,393,542
Data file (data)
Col# Parameter (Unit)
1 Seconds (s)
2 Day (Day in August 2013)
3 Burst counter (counts)
4 Ensemble counter (counts)
5 Velocity (Beam1|X|East) (m/s)
6 Velocity (Beam2|Y|North) (m/s)
7 Velocity (Beam3|Z|Up) (m/s)
8 Amplitude (Beam1) (counts)
9 Amplitude (Beam2) (counts)
10 Amplitude (Beam3) (counts)
11 SNR (Beam1) (dB)
12 SNR (Beam2) (dB)
13 SNR (Beam3) (dB)
14 Correlation (Beam1) (%)
15 Correlation (Beam2) (%)
16 Correlation (Beam3) (%)
17 Pressure (dbar)
18 Analog input 1 (counts)
19 Analog input 2 (counts)
20 Checksum (1=failed)
Vector (Nortek)
Accuracy: ± 0.5% of measured value ±1 mm/s
Velocity precision: typ. 1% of velocity range (at 16 Hz)
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 |
130816_Huettel filename: 130816_Huettel.dat (Octet Stream, 602.87 MB) MD5:2169def105b830570767e07d3e9efbb3 Current flow and oxygen concentrations recorded by the 2OEC-instrument from August 16-17, 2013.
Time of first measurement 16 Aug. 2013, 10:30:00
Time of last measurement 17 Aug. 2013, 11:23:24
Number of measurements 5,734,705
Data file (data)
Col# Parameter (Unit)
1 Seconds (s)
2 Day (Day in August 2013)
3 Burst counter (counts)
4 Ensemble counter (counts)
5 Velocity (Beam1|X|East) (m/s)
6 Velocity (Beam2|Y|North) (m/s)
7 Velocity (Beam3|Z|Up) (m/s)
8 Amplitude (Beam1) (counts)
9 Amplitude (Beam2) (counts)
10 Amplitude (Beam3) (counts)
11 SNR (Beam1) (dB)
12 SNR (Beam2) (dB)
13 SNR (Beam3) (dB)
14 Correlation (Beam1) (%)
15 Correlation (Beam2) (%)
16 Correlation (Beam3) (%)
17 Pressure (dbar)
18 Analog input 1 (counts)
19 Analog input 2 (counts)
20 Checksum (1=failed)
Vector (Nortek)
Accuracy: ± 0.5% of measured value ±1 mm/s
Velocity precision: typ. 1% of velocity range (at 16 Hz)
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 |
140410_Huettel filename: 140410_Huettel.dat (Octet Stream, 695.04 MB) MD5:842bc3cc25fb0990f8e3540ea299168d Current flow and oxygen concentrations recorded by the 2OEC-instrument from April 10-11, 2014
Time of first measurement 10 Apr. 2014, 10:00:00
Time of last measurement 11 Apr. 2014, 14:32:42
Number of measurements 6,576,690
Data file (data)
Col# Parameter (Unit)
1 Seconds (s)
2 Day (Day in April 2014)
3 Burst counter (counts)
4 Ensemble counter (counts)
5 Velocity (Beam1|X|East) (m/s)
6 Velocity (Beam2|Y|North) (m/s)
7 Velocity (Beam3|Z|Up) (m/s)
8 Amplitude (Beam1) (counts)
9 Amplitude (Beam2) (counts)
10 Amplitude (Beam3) (counts)
11 SNR (Beam1) (dB)
12 SNR (Beam2) (dB)
13 SNR (Beam3) (dB)
14 Correlation (Beam1) (%)
15 Correlation (Beam2) (%)
16 Correlation (Beam3) (%)
17 Pressure (dbar)
18 Analog input 1 (counts)
19 Analog input 2 (counts)
20 Checksum (1=failed)
Vector (Nortek)
Accuracy: ± 0.5% of measured value ±1 mm/s
Velocity precision: typ. 1% of velocity range (at 16 Hz)
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 |
| Dataset-specific Instrument Name | Nortek Vector ADV |
| Generic Instrument Name | Acoustic Doppler Velocimeter |
| Dataset-specific Description | Nortek Vector ADV, Serial number VEC 1436
Calibrations:
The Nortek Vector ADV was factory-calibrated prior to the deployments
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). |
| Generic Instrument 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)0152.0.CO;2 |
NSF Award Abstract:
The PIs request funding to build and test robust eddy correlation instruments for unidirectional and oscillating flow environments based on sturdy fiber- and planar-optical sensors and novel signal-processing electronics. The new hardware will be supported by software development to correct potential flux underestimations caused by inadequate oxygen sensor response time and spatial offsets between oxygen and flow sensors. The fragility of the thin glass microelectrode used in aquatic eddy correlation instruments severely limits the use of this powerful technique for flux measurements in benthic environments. This problem represents the major bottleneck preventing the widespread use of this approach.
Broader Impacts:
The PIs have very strong records both in spreading the use of EC technology through the community and in graduate and undergraduate education. They outline clearly the ways in which they will continue their ongoing endeavors in both areas. In addition, the application of this technology to the geochemistry and ecology of shallow-water regions has broad implications for carbon cycling and ocean acidification studies, both of which have important societal ramifications. Better quantify oxygen fluxes in the aquatic environment is important for society. It can e.g. help predict when and if the health of an aquatic system is being weakened, and when e.g. hypoxia or anoxia is approaching. Anoxia leads to death of all higher life
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) | |
| NSF Division of Ocean Sciences (NSF OCE) |