Dataset: ADCP - TRANSPORT Fixed Station Moored

Name: Moored ADCP data from the Fixed Station cruises of the TRANSPORT program collected from the R/V Hugh R. Sharp cruises in the Choptank River, Chesapeake Bay during 2011-2012 (TRANSPORT project)
Published: 2015-09-21
Keywords: oceans

Cite This Dataset

Spatial Extent: N:38.642333 E:-76.198333 S:38.614333 W:-76.331667

Project:

Integrating field methods and numerical models to quantify the links between larval transport, connectivity, and population dynamics (TRANSPORT)

Principal Investigator:

Elizabeth North (University of Maryland Center for Environmental Science, UMCES/HPL)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2015-09-21

Validated:

Yes

Current State:

Final no updates expected

Moored ADCP data from the Fixed Station cruises of the TRANSPORT program collected from the R/V Hugh R. Sharp cruises in the Choptank River, Chesapeake Bay during 2011-2012 (TRANSPORT project)

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Description

The ADCP data were collected in the Choptank River at four fixed locations in July 2011 and 2012.

Data Processing Description

BCO-DMO Processing:

- added conventional header with dataset name, PI name, version date
- renamed parameters to BCO-DMO standard
- created toplevel file to serve individual files as a single object
- added cruise_name, cruise_id

Versions:
- v2: 2015-09-21: added ISO_DateTime_UTC and time_UTC columns
- v1: 2015-09-14: served data

Data Files

File
ADCP_FSBT.csv (Comma Separated Values (.csv), 8.10 MB) MD5:c21c5471beca46271a070a64b818072e Primary data file for dataset ID 566880

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0829512

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
HRS110714EN	FSBT11	2011-07-14	R/V Hugh R. Sharp	Elizabeth North (Chief Scientist)	data info
HRS120711EN	FSBT12	2012-07-10	R/V Hugh R. Sharp	Elizabeth North (Chief Scientist)	data info

Instruments

Acoustic Doppler Current Profiler

Supplied Name: ADCP

Supplied Description:

TRDI Workhorse sentinel 1200 KHz, with mode 12 (high ping rate)

Instrument Type

Generic Name: Acoustic Doppler Current Profiler

Acronym: ADCP

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/115/

Generic Description:

The ADCP measures water currents with sound, using a principle of sound waves called the Doppler effect. A sound wave has a higher frequency, or pitch, when it moves to you than when it moves away. You hear the Doppler effect in action when a car speeds past with a characteristic building of sound that fades when the car passes. The ADCP works by transmitting "pings" of sound at a constant frequency into the water. (The pings are so highly pitched that humans and even dolphins can't hear them.) As the sound waves travel, they ricochet off particles suspended in the moving water, and reflect back to the instrument. Due to the Doppler effect, sound waves bounced back from a particle moving away from the profiler have a slightly lowered frequency when they return. Particles moving toward the instrument send back higher frequency waves. The difference in frequency between the waves the profiler sends out and the waves it receives is called the Doppler shift. The instrument uses this shift to calculate how fast the particle and the water around it are moving. Sound waves that hit particles far from the profiler take longer to come back than waves that strike close by. By measuring the time it takes for the waves to bounce back and the Doppler shift, the profiler can measure current speed at many different depths with each series of pings. (More from WHOI instruments listing).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_name	Cruise name as given by PI	unitless	cruise_name
cruise_id	Official cruise identification	unitless	cruise_id
year	Calendar year	YYYY	year
month	Calendar month	mm	month
day	Day of month	dd	day
hr_UTC	Hour in UTC time base (same as GMT)	HH	hour_gmt
min	Minutes of hour	MM	minute_gmt
sec	Seconds of minute	SS	seconds_gmt
julian_day	Numeric time in Julian day for year in UTC time base	unitless	julian_day
deploy_id	Deployment identification string	unitless	deployno
ensemble	ADCP ensemble number. Each recorded profile has a unique ensemble number. Ensembles were recorded at 1 second intervals. Mean current data represents average of 300; 1 Hz ensembles each; therefore from one avg ensemble to the next jumps by 300.	unitless	no_bcodmo_term
lat_start	Latitude geographic coordinate of site in decimal degree format	decimal degrees	lat_start
lon_start	Longitude geographic coordinate of site in decimal degree format. Minus indicates western hemisphere	decimal degrees	lon_start
bin_range	Distance from ADCP transducer to center of measurement bin in meters	meters	no_bcodmo_term
elev	Elevation in meters of center of measurement bin above seabed	meters	altitude
depth	Depth in meters to center of measurement bin; determined from water depth estimate from ADCP pressure sensor (if available) or ADCP acoustic surface tracking.	meters	depth
total_depth_echo	Total water depth in meters from ADCP acoustic surface tracking estimate. This method can be unreliable under certain environmental conditions and is generally used as back-up if pressure sensor is unavailable	meters	depth
curr_spd	Current magnitude (speed)	meters/second	curr_speed_abs
curr_dirT	Direction of current travel in degrees true (Oceanographic convention)	degrees	curr_dir_abs
east_vel	Easterly current velocity in meters per second. Negative values mean westerly directed current component	meters per second	U
north_vel	Northerly current velocity in meters per second. Negative values mean southerly directed current component	meters per second	V
vert_vel	Vertical (+ up) current velocity in meters per second	meters per second	curr_vtvel
error_vel	Error velocity from ADCP in meters per second	meters per second	no_bcodmo_term
dudz	Resultant vertical velocity shear [s-1]. Used in Richardson Number calculation	per second	no_bcodmo_term
princax	Direction of principal axis in degrees true	degrees	no_bcodmo_term
along_vel	Along channel current velocity in meters per second. Ebb direction is positive	meters per second	curr_speed_abs
cross_vel	Cross channel current velocity in meters per second. Right-hand coordinate system used with thumb pointing in up direction	meters per second	curr_speed_abs
percent_good	Percent good pings from internal ADCP quality checks	percent	no_bcodmo_term
temperature	Water temperature at ADCP transducer	degrees Celsius	temp
heading_M	ADCP heading in degrees magnetic from internal compass	degrees	heading
heading_T	ADCP heading in degrees true. Local magnetic variation applied to Heading_M (mv=-11.2)	degrees	heading
pitch	ADCP pitch from internal tilt sensor	degrees	pitch
roll	ADCP roll from internal title sensor	degrees	roll
corr_bm1	ADCP beam 1 correlation value (0-255 scale)	unitless	no_bcodmo_term
corr_bm2	ADCP beam 2 correlation value (0-255 scale)	unitless	no_bcodmo_term
corr_bm3	ADCP beam 3 correlation value (0-255 scale)	unitless	no_bcodmo_term
corr_bm4	ADCP beam 4 correlation value (0-255 scale)	unitless	no_bcodmo_term
intens_bm1	ADCP beam 1 echo intensity	decibels	no_bcodmo_term
intens_bm2	ADCP beam 2 echo intensity	decibels	no_bcodmo_term
intens_bm3	ADCP beam 3 echo intensity	decibels	no_bcodmo_term
intens_bm4	ADCP beam 4 echo intensity	decibels	no_bcodmo_term
ISO_DateTime_UTC	UTC time; ISO formatted,yyyy-mm-ddTHH:MM:SS[.xx]		ISO_DateTime_UTC
time_UTC	UTC time; formatted as HHMM		time_utc

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Dataset: ADCP - TRANSPORT Fixed Station Moored