Dataset: mulvfs_beamc
Deployment: TT007

Beam attenuation, transmissometer data, MULVFS casts

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)

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Version:

December 9, 1998

Deployment Synonyms:

EqPac Spring Survey

Version Date:

1998-12-09

Data URL:

https://www.bco-dmo.org/dataset-deployment/450813/data

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Description

Beam attenuation, transmissometer data, MULVFS casts

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:              James K. Bishop
   of:              University of Victoria
   dataset:         Beam attenuation, transmissometer data from MULVFS casts
   dates:           February 02, 1992 to March 09, 1992
   location:        N: 13.1796  S: -12.1134  W: -142.0973  E: -135.0167
   project/cruise:  EQPAC/TT007 - Spring Survey
   ship:            Thomas Thompson
 
   Reference:  Bishop, J.K.B. (1986). The correction and suspended mass
   calibration of Sea Tech transmissometer data.
   Deep-Sea Research, 33: 121-134.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

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

Supplied Name	Supplied description	Supplied Units	Standard Name
event	event number from event log format (MMDDhhmm) - time is local time		event
sta	station number from event log		no_bcodmo_term
cast	MULVFS cast number		cast
data_rev	revison date of station data (format YYMMDD)		no_bcodmo_term
lat	latitude at time of start of downcast negative numbers south		lat
lon	longitude at time of start of downcast negative numbers west		lon
cast_type	downcast or upcast		no_bcodmo_term
press	insitu pressure, accuracy +/- 3dBar	decibars	press
temp	in-situ temperature, accuracy +/- 0.01	degrees C	temp
sal	salinity, accuracy +/- 0.01 psu	psu	sal
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

Contribute Data

Dataset: mulvfs_beamc
Deployment: TT007

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: mulvfs_beamcDeployment: TT007

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: mulvfs_beamc
Deployment: TT007