Dataset: dye_bh

Name: Scanfish data from dye injection studies on Georges Bank from R/V Oceanus cruise OC342 in 1999 as part of the U.S. GLOBEC program (GB project)
Published: 2006-03-28
Keywords: oceans

Cite This Dataset

Spatial Extent: N:42.15668 E:-66.51578 S:40.91682 W:-67.63352

Temporal Extent: 1999 - 1999

Project:

U.S. GLOBEC Georges Bank (GB)

Program:

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)

Principal Investigator:

Robert W. Houghton (Lamont-Doherty Earth Observatory, LDEO)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2006-03-28

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Scanfish data from dye injection studies on Georges Bank from R/V Oceanus cruise OC342 in 1999 as part of the U.S. GLOBEC program (GB project)

Abstract:

Scanfish data from dye injection studies on Georges Bank from R/V Oceanus cruise OC342 in 1999 as part of the U.S. GLOBEC program.

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2006-03-28	National Oceanographic Data Center (NODC)	0104401	2013-04-07

Description

Dye Experiment Study of Cross-Frontal Exchange, R/V Oceanus Cruise 342
DMO notes:
The documentation below describes a two ship operation. The data reported here are from the Bob Houghton cruise on the Oceanus 342.

PI documentation:
Two cruises were undertaken in May and June 1999 in which dye patches were released to study cross-frontal exchange. On Oceanus Cruise 342, led by Bob Houghton of LDEO, dye was released in the bottom mixed layer. A Scanfish towed unit was used to moniter the dispersion of dye as well as locate the frontal system on the Southern flank of Georges Bank. Jim Ledwell and Jim Churchill of WHOI led Endeavor Cruise 323/324 in which dye and drifters were deployed in the pycnocline and in the surface layer. Sampling on this cruise was done by the WHOI VPR group, yielding plankton distributions.

Figure 1 shows the location of dye and drifter deployments during these cruises. The LDEO dye was Fluorescein injected into the bottom mixed layer on the stratified side of the tidal front. The WHOI dye was Rhodamine-WT: #1 injected into the surface (1-3 m ) layer and #2-4 into the pycnocline. During the WHOI dye injections additional WHOI drifters drogued at various depths were deployed in the dye patch. Drifters also drogued at various depths were deployed by Manning in April and May on NOAA cruises. See the time line for the temporal distribution of the experiments.

Additional information about this experiment is available at the on-line report entitled Distribution of Salinity on the Cap of Georges Bank

The work is described in more detail in the following cruise reports:

Houghton, R. W., R/V Oceanus Cruise 342 to Georges Bank, Cruise Report, U. S. GLOBEC Northwest Atlantic/Georges Bank Program, 1999.

Ledwell, J. R., T. G. Donoghue, C. J. Sellers, J. H. Churchill, D. Torres, D. McGillicuddy, V. Kosnyrev, C. S. Davis, S. M. Gallager, C. J. Ashjian, A. P. Girard, P. Alatalo, and Q. Hu, Lagrangian Studies of the Tidal Mixing Front on Georges Bank, R/V Endeavor Cruises 323 and 324, Cruise Report, U. S. GLOBEC Northwest Atlantic/Georges Bank Program, 2000.

McGillicuddy, D. J., and V. K. Kosnyrev, Real-Time Modeling on Cruises EN323 and EN324, Cruise Report, U. S. GLOBEC Northwest Atlantic/Georges Bank Program, 1999.

Questions concerning these data should be directed to:
Bob Houghton
Lamont-Doherty Earth Observatory of Columbia Univ. 202 Oceanography
Palisades, NY 10964
Phone: 845-365-8328
E-mail: houghton@ldeo.columbia.edu

Last updated March 28, 2006

Methods & Sampling

On Oceanus Cruise 342, led by Bob Houghton of LDEO, dye was released in the bottom mixed layer. A Scanfish towed unit was used to moniter the dispersion of dye as well as locate the frontal system on the Southern flank of Georges Bank. Jim Ledwell and Jim Churchill of WHOI led Endeavor Cruise 323/324 in which dye and drifters were deployed in the pycnocline and in the surface layer. Sampling on this cruise was done by the WHOI VPR group, yielding plankton distributions.

Data Processing Description

Additional information about this experiment is available at the on-line report entitled Distribution of Salinity on the Cap of Georges Bank

Data Files

File
dye_bh.csv (Comma Separated Values (.csv), 49.99 MB) MD5:4593f1754ac2c1f24787bfff06a4e9f9 Primary data file for dataset ID 2420

More Information about this dataset

Funding Sources

Funding Source	Award Number
National Oceanic and Atmospheric Administration	unknown GB NOAA
NSF Division of Ocean Sciences	OCE-9806361

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
OC342		1999-05-20	R/V Oceanus	Robert W. Houghton (Chief Scientist)	data info

Instruments

Drifter Buoy

Supplied Description:

Drifter buoy to include the Beardsley Drifter (BDFT)

Instrument Type

Generic Name: Drifter Buoy

Generic Description:

Drifting buoys are free drifting platforms with a float or buoy that keep the drifter at the surface and underwater sails or socks that catch the current. These instruments sit at the surface of the ocean and are transported via near-surface ocean currents. They are not fixed to the ocean bottom, therefore they "drift" with the currents. For this reason, these instruments are referred to as drifters, or drifting buoys.

The surface float contains sensors that measure different parameters, such as sea surface temperature, barometric pressure, salinity, wave height, etc. Data collected from these sensors are transmitted to satellites passing overhead, which are then relayed to land-based data centers.

definition sources: https://mmisw.org/ont/ioos/platform/drifting_buoy and https://www.aoml.noaa.gov/phod/gdp/faq.php#drifter1

Scanfish

Supplied Description:

Towed vehicle provided by the University of Rhode Island. Scanfish towed unit was used to moniter the dispersion of dye

Instrument Type

Generic Name: Scanfish

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/131/

Generic Description:

The Scanfish is a remotely operated, towed, undulating vehicle system designed for collecting 3D profile data of the water column. It includes a Conductivity, Temperature, Depth (CTD) profiler as part of the instrument package. The Scanfish housing has fins to allow it to dive and rise, an altimeter to determine the depth of the unit, a pump that moves water through the system and a data cable that reports data back to the ship as the fish is being towed through the water behind the vessel. The Scanfish can be configured with additional sensors, e.g. fluorometer.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	cruise identification		cruiseid
year	Year of cruise, 4 digit year		year
injection	dye injection number		no_bcodmo_term
survey	survey number		no_bcodmo_term
line	Line number		no_bcodmo_term
yrday_gmt	Year day based on Julian Calendar, year day 1.5 = Jan 1 at 1200 hrs	YYY.Y	yrday_gmt
lat	latitude, negative = South	DD.D	lat
lon	longitude, negative = West	DD.D	lon
press	depth of sample reported as pressure	decibars	press
temp	water temperature	Deg. C	temp
sal	salinity, PSU	dimensionless	sal
sigma_t	density	kg/m<sup>3</sub>	sigma_t
flvolt	fluorescence, from CTD mounted fluorometer	volts	flvolt
dye	dye amount	kg of water/kg of dye * 10<sup>11</sup>	no_bcodmo_term

Status message

Database

Contribute Data

Dataset: dye_bh