Dataset: optics_trap

Name: Optics from floating sediment traps from R/V Thomas G. Thompson cruise TT007 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project
Published: 1996-02-14
Keywords: oceans

Cite This Dataset

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Program:

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

Principal Investigator:

Dr Charles C. Trees (San Diego State University, SDSU)

BCO-DMO Data Manager:

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

Version:

February 14, 1996

Version Date:

1996-02-14

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/2666/data

Optics from floating sediment traps from R/V Thomas G. Thompson cruise TT007 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project

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Description

Optics from floating sediment traps

Acquisition Description

   PI:              Charles Trees
   of:              San Diego State University
   dataset:         Bio Optics deployed with Murray's Floating Sediment Traps
   dates:           February 11, 1992 to February 13, 1992
   location:        N: 5.1083  S: 5.0158  W: -140.0305  E: -139.8817
   project/cruise:  EQPAC/TT007 - Spring Survey
   ship:            Thomas Thompson

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	Dr James W. Murray (Chief Scientist)	data info

Instruments

Bio-Optical Profiling System

Supplied Description:

Instrument Type

Generic Name: Bio-Optical Profiling System

Acronym: BOPS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

Bio-Optical Profiling System (BOPS) is an updated version of the BOPS originally developed by Smith et al. (1984) and is used to collect optical data. The heart of the BOPS is a Biospherical instruments MER-1048 Spectroradiometer which measures up and downwelling spectral irradiance and upwelling spectral radiance. The MER-1048 also has sensors for Photosynthetically Available Radiation (PAR), depth, tilt and roll. In addition, temperature and conductivity are measured with a Sea-Bird CTD, chlorophyll fluorescence is measured with a Sea Tech fluorometer and beam transmission with a Sea Tech 25-cm transmissometer. The Mer-1048 acquires all the data 16 times a second, averages it to four records a second and sends it up the cable to a deck box and a Compaq-286 computer which stores the data on the hard disk. Additionally, a deck cell measures the downwelling surface irradiance in four spectral channels. Also surface PAR is measured continuously using a Biospherical Instruments QSR-240 Integrating PAR sensor. The profile data is commonly filtered to remove obvious data spikes and then binned into one-meter averages.

Raymond C. Smith, Charles R. Booth, and Jeffrey L. Star, "Oceanographic biooptical profiling system," Appl. Opt. 23, 2791-2797 (1984).

Sediment Trap - Floating

Supplied Name: Floating Sediment Trap

Supplied Description:

Instrument Type

Generic Name: Sediment Trap - Floating

Acronym: Sed Trap - Float

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/33/

Generic Description:

Floating sediment traps are specially designed sampling devices deployed to float in the water column (as opposed to being secured to a mooring at a fixed depth) for periods of time to collect particles from the water column that are falling toward the sea floor. In general a sediment trap has a container at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. The 'Sediment Trap -Floating' designation is used for a floating type of sediment trap about which no other design details are known.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
file	a unique file number assigned to each data set		unknown
sta	station number from event log		unknown
lat_n	nominal latitude (- values are South)	whole degrees	unknown
event	event number from event log		event
date_end	end date/time of the data or the mooring deployment (reported as MMDDHHmm)		unknown
date	date of data cycle (reported as MMDDYY)		unknown
time	time of data cycle (reported as (HHmmss)		unknown
par	photosynthetically available radiation at the reported depth	uE/m2/sec	PAR
fluor	natural fluorescense - upwelled radiance at 683 nm	nE/m2/ster/sec	fluor
depth	water depth of recording instrument	meters	depth
temp	water temperature at reported depth	deg C	temp

Database

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Dataset: optics_trap