Dataset: mulvfs_beamc

Name: Beam attenuation, transmissometer data, MULVFS casts from R/V Thomas G. Thompson cruises TT007, TT011 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project
Published: 1998-12-09
Keywords: oceans

View Data: to access data, check the deployments below

Cite This Dataset

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Program:

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)

Principal Investigator:

James K.B. Bishop (E.O. Lawrence Berkeley, LBNL)

BCO-DMO Data Manager:

Cynthia L. Chandler (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

December 9, 1998

Version Date:

1998-12-09

Validated:

Yes

Current State:

Final no updates expected

Beam attenuation, transmissometer data, MULVFS casts from R/V Thomas G. Thompson cruises TT007, TT011 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project

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Description

Beam attenuation, transmissometer data, MULVFS casts

Methods & Sampling

See Platform deployments for cruise specific documentation

More Information about this dataset

Funding Sources

None available yet

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TT007	EqPac Spring Survey	1992-01-30	R/V Thomas G. Thompson	James W. Murray (Chief Scientist)	data info
TT011	EqPac Fall Survey	1992-08-05	R/V Thomas G. Thompson	Richard Barber (Chief Scientist)	data info

Instruments

Multiple Unit Large Volume Filtration System

Supplied Name: Multi Unit Large Volume Filtration System

Supplied Description:

MULVFS(Multiple Unit Large Volume in situ Filtration System) was used to collect water samples.

Instrument Type

Generic Name: Multiple Unit Large Volume Filtration System

Acronym: MULVFS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/32/

Generic Description:

The Multiple Unit Large Volume Filtration System (MULVFS) was first described in Bishop et al., 1985 (doi: 10.1021/ba-1985-0209.ch009). The MULVFS consists of multiple (commonly 12) specialized particulate matter pumps, mounted in a frame and tethered to the ship by a cable (Bishop et al., 1985; Bishop and Wood, 2008). The MULVFS filters particulates from large volumes of seawater, although the exact protocols followed will vary for each project.

Sea Tech Transmissometer

Supplied Name: SeaTech Transmissometer

Supplied Description:

Instrument Type

Generic Name: Sea Tech Transmissometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0003/

Generic Description:

The Sea Tech Transmissometer can be deployed in either moored or profiling mode to estimate the concentration of suspended or particulate matter in seawater. The transmissometer measures the beam attenuation coefficient in the red spectral band (660 nm) of the laser lightsource over the instrument's path-length (e.g. 20 or 25 cm). This instrument designation is used when specific make and model are not known. The Sea Tech Transmissometer was manufactured by Sea Tech, Inc. (Corvalis, OR, USA).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
temp	in-situ temperature, accuracy +/- 0.01	degrees C	temp
sta	station number from event log		no_bcodmo_term
sal	salinity, accuracy +/- 0.01 psu	psu	sal
press	insitu pressure, accuracy +/- 3dBar	decibars	press
lon	longitude at time of start of downcast negative numbers west		lon
lat	latitude at time of start of downcast negative numbers south		lat
event	event number from event log format (MMDDhhmm) - time is local time		event
data_rev	revison date of station data (format YYMMDD)		no_bcodmo_term
cast_type	downcast or upcast		no_bcodmo_term
cast	MULVFS cast number		cast
beam_c	beam attenuation coefficient (calibrated) 1-m pathlength SeaTech transmissometer @675 nm data are reproducible to better than 0.001 in deep water between TT007 and TT011. clear water value for beamc is 0.364.	meters^-1	beam_c
beamc	beam attenuation coefficient (calibrated) 1-m pathlength SeaTech transmissometer @675 nm data are reproducible to better than 0.001 in deep water between TT007 and TT011. clear water value for beamc is 0.364.	meters^-1	no_bcodmo_term

Database

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Dataset: mulvfs_beamc