Dataset: chl
Deployment: TT007

CTD Fluorometric chlorophyll a and total phaeopigment

Principal Investigator:

James W. Murray (University of Washington, UW)

Jan Newton (University of Washington, UW)

BCO-DMO Data Manager:

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

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Version:

June 24, 2002

Deployment Synonyms:

EqPac Spring Survey

Version Date:

2002-06-24

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/450836/data

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Description

CTD Fluorometric chlorophyll a and total phaeopigment

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:              Jan Newton/James Murray
   of:              University of Washington
   dataset:         CTD Fluorometric chlorophyll a and total phaeopigment
   dates:           February 05, 1992 to March 08, 1992
   location:        N: 12.0284  S: -12.2083  W: -140.7452  E: -134.7269
   project/cruise:  EQPAC/TT007 - Spring Survey
   ship:            Thomas Thompson
 
   PI note:  Due to chlorophyll degradation by the acetone (reagent grade,
   in cans) the data for the following CTD casts have been deleted
   from the file:  1, 3, 5, 6, 7, 8, 20, 23, 25, 30, 33, 35, 37 and 38.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Instruments

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

CTD clean rosette (Niskin) bottles were used to collect water samples.

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
event	event/operation number from event log		event
sta	station number from event log		no_bcodmo_term
cast	CTD cast number from event log		cast
comment	free text data quality notes		no_bcodmo_term
bot	CTD rosette bottle number		no_bcodmo_term
depth_n	nominal sample depth	meters	no_bcodmo_term
fluor_vol_filt	volume of sample filtered	liters	no_bcodmo_term
scale	sensitivity scale on the fluorometer		no_bcodmo_term
df	door factor; true value of sensitivity scale		no_bcodmo_term
B	calibration factor		no_bcodmo_term
Fo	original fluorometer reading		no_bcodmo_term
Fa	fluorometer reading after 2 drops 1N HCL		no_bcodmo_term
chl_a_fluor	chlorophyll a; fluorometric method	micrograms/liter	no_bcodmo_term
phaeo	total phaeopigment	micrograms/liter	phaeo
Fo_to_Fa	Fo to Fa ratio. ranges between max. 2.10, all chlorophyll-a no Phaeopigment min. 1.00, no chlorophyll-a all Phaeopigment		no_bcodmo_term

Database

Contribute Data

Dataset: chl
Deployment: TT007

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: chlDeployment: TT007

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: chl
Deployment: TT007