Dataset: Velocity from ADV at station E

Name: Current velocity at station E at an oyster reef in Wassaw Sound, Georgia in November of 2014 (SensoryNCE project)
Published: 2018-07-12
Keywords: oceans

Cite This Dataset

Spatial Extent: N:31.9199 E:-81.1392 S:31.9199 W:-81.1392

Temporal Extent: 2014-11-03 - 2014-11-06

Project:

The role of the sensory environment and predator chemical signal properties in determining NCE strength in cascading interactions on oyster reefs (SensoryNCE)

Principal Investigator:

Marc Weissburg (Georgia Institute of Technology, GA Tech)

Co-Principal Investigator:

Julia Kubanek (Georgia Institute of Technology, GA Tech)

Donald Webster (Georgia Institute of Technology, GA Tech)

Contact:

Donald Webster (Georgia Institute of Technology, GA Tech)

BCO-DMO Data Manager:

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

Version:

Version Date:

2018-07-12

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/709379/data

Current velocity at station E at an oyster reef in Wassaw Sound, Georgia in November of 2014 (SensoryNCE project)

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Description

This dataset contains velocity measurements at an intertidal and subtidal oyster reefs in Wassaw Sound, Georgia from November 3rd to 6th, 2014.

These data were published in Young et al., 2016 (see Fig. 3)

In addition to the "Get data" button above which provides various options to download the data in ASCII format, the originally submitted data is available in MATLAB .mat format (FinalADV07_11032014.mat, 346 KB)

A subset of these data corresponding to Figure 3 in Young et al., 2016 can be downloaded as (ADV_E_Velocity_11032014.mat, 203 KB)

Acquisition Description

The equipment used is an Acoustic Doppler Velocimeter (ADV, Nortek Vector – Nortek AS, Rud, Norway). ADVs measure the fluid velocity at essentially a point in the flow. The ADV measurements have a resolution of 1 mm/s and were collected continuously at 1 Hz.

Sampling Location Map:

Image courtesy of David Young

Processing Description

Data collected during low tide (determined by instances of the PT at station D being dry) were discarded. Following the recommendations of Chanson et al. (2008) and Wilson et al. (2013), data for which the average correlation coefficient of the three beams was less than 70% for 45 consecutive samples, or for which the average over 300 samples of the mean correlation coefficient of the three beams dropped below 70%, were discarded. This filtering predominately removed data collected while the instrument was not submerged, and less than 2% of the submerged instrument data were removed due to filtering.

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* data extracted from MATLAB .mat files to ASCII flat files to serve in the BCO-DMO system
* modified parameter names to conform with BCO-DMO naming conventions
* added approximate lat and lon of sampling location to data
* data rounded to three decimal places
* Time format changed from matlab datenum to Date and Time (yyyy-mm-dd,HH:MM:SS)
* Data version 2 (2018-07-12) replaces data version 1 (2017-07-20) - improved metadata, added timestamp in UTC in addition to local date/time

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1234449

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SensoryNCE_2014	RoseDhu11.03.2014	2014-11-03	Wassaw_Sound_GA	Marc Weissburg (Principal Investigator)	data info

Instruments

Acoustic Doppler Velocimeter

Supplied Name: ADV, Nortek Vector

Supplied Description:

Acoustic Doppler Velocimeter (ADV, Nortek Vector – Nortek AS, Rud, Norway).

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

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
date	Date (local EST) in format yyyy-mm-dd	unitless	date
time	Time (local EST) in format HH:MM	unitless	time
velocity_mag	Velocity magnitude	centimeters per second(cm/s)	curr_speed_abs
velocity_dir	Velocity direction; angle relative to east	radians	curr_dir_rel
lat_approx	Approximate latitude	decimal degrees	lat
lon_approx	Approximate longitude	decimal degrees	lon
ISO_DateTime_UTC	Timestamp (UTC) in standard ISO 8601:2004(E) format YYYY-mm-ddTHH:MM:SSZ	unitless	ISO_DateTime_UTC

Database

Geospatial Access

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Dataset: Velocity from ADV at station E