Dataset: optics

Name: Vertical profiles of PAR, upwelled irradiance and CTD data from R/V Endeavor cruise EN198 in the North Atlantic (U.S. JGOFS NABE project)
Published: 1995-08-02
License: https://creativecommons.org/licenses/by/4.0/
Keywords: oceans

Cite This Dataset

Project:

U.S. JGOFS North Atlantic Bloom Experiment (NABE)

Principal Investigator:

Dr William Broenkow (Moss Landing Marine Laboratories, MLML)

BCO-DMO Data Manager:

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

Version Date:

1995-08-02

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/2567/data

Vertical profiles of PAR, upwelled irradiance and CTD data from R/V Endeavor cruise EN198 in the North Atlantic (U.S. JGOFS NABE project)

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Description

Vertical profiles of PAR, upwelled irradiance w/CTD data

Acquisition Description

   PI:             William Broenkow
   of:             Moss Landing Marine Laboratories
   dataset:        Vertical profiles of PAR, upwelled irradiance w/CTD data from Moss Landing
   dates:          June 30, 1989 to July 4, 1989
   location:       N: 59.5283 S: 59.4900 W: -20.9833  E: -20.8383
   project/cruise  North Atlantic Bloom Experiment/Endeavor 198
   ship:           Endeavor

More Information about this dataset

Funding Sources

Funding Source	Award Number
National Science Foundation	unknown NABE NSF

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN198	END-198	1989-06-28	R/V Endeavor	Dr William Broenkow (Chief Scientist)	data info

Instruments

Bio-Optical Profiling System

(more info)

Short Name: BOPS

Community Standard Description

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).

PI supplied instrument name: Bio-Optical Profiling System

Dataset-specific description

Bio Optical Profiler

CTD profiler

(more info)

Short Name: CTD

Community Standard Description

Generic Description

The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.

PI supplied instrument name: Conductivity, Temperature, Depth

Dataset-specific description

CTD measurements taken, CTD unit unidentified

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
sta	station		unknown
cast	CTD cast number from event log		cast
event	event number from event log		event
lat	latitude from event log	decimal degrees	lat
lon	longitude from event log	decimal degrees	lon
par_ei_norm	Mean incident Ei PAR	uMole/m^2/sec	unknown
depth_cast	nominal maximum depth of cast	meters	depth_cast
time1	Mean Time GMT	decimal hrs	unknown
time_span1	Time Span	min	unknown
repl_1	Replicates per depth		unknown
sal	Mean Salinity	dimensionless	sal
temp1	Mean Temperature	degrees C	unknown
press1	Mean Pressure	decibars	unknown
o2	Mean Oxygen	ml/l	O2
beam	Mean Beam Attenuation 490 nm	1/m	unknown
fluor	Mean Rescaled Fluorescence 680 nm		fluor
time2	Mean Time GMT	decimal hrs	unknown
time_span2	Time Span	minutes	unknown
repl_2	Replicates per depth		unknown
lu_450	Mean Upwelled Radiance Lu 450 nm	uW/cm^2/sr	unknown
lu_500	Mean Upwelled Radiance Lu 500 nm	uW/cm^2/sr	unknown
par_eo	Mean PAR Spherical Irradiance Eo	uMole/m^2/sec	unknown
par_ei	Mean Incidence Irradiance Ei	uMole/m^2/sec	unknown
temp2	Mean Temperature	degrees C	temp2
press2	Mean Pressure	decibars	unknown
lu_450_pc	percent Upwelled Radiance Lu 450 nm	percent	unknown
lu_500_pc	percent Upwelled Radiance Lu (500 nm)	percent	unknown
par_eo_pc	percent PAR Spherical Irradiance Eo	percent	unknown

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Dataset: optics