Dataset: poc_pon
Deployment: TT049

Particulate Organic Carbon and Particulate Organic Nitrogen

Principal Investigator:

Hugh W. Ducklow (Marine Biological Laboratory Ecosystems Center, MBL - Ecosystems)

BCO-DMO Data Manager:

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

Project:

U.S. JGOFS Arabian Sea (Arabian Sea)

Version:

June 3, 1997

Deployment Synonyms:

TTN049, TN049, TTN-049

Version Date:

1997-06-03

Data URL:

https://www.bco-dmo.org/dataset-deployment/450630/data

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Description

Particulate Organic Carbon and Particulate Organic Nitrogen

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:                Hugh Ducklow
   of:                Virginia Institute of Marine Science 
   dataset:           Particulate Organic Carbon and Particulate Organic Nitrogen
   dates:             July 18, 1995 to August 13, 1995
   location:          N: 22.5001  S: 9.911  W: 57.2997  E: 68.7507
   project/cruise:    Arabian Sea/TTN-049, Process cruise 4 (Middle SW Monsoon)
   ship:              R/V Thomas Thompson


  Particulate organic carbon and nitrogen were collected from standard
  hydrocasts and filtered over low vacuum onto precombusted GF/F
  filters, and stored for subsequent analysis following JGOFS
  protocols. Samples were acidified, and represent organic
  carbon. Samples were
  analyzed at the Bermuda Biological Station for Research by BATS
  personnel using the BATS/JGOFS protocols.

  In general the deep water (> 1000 m) values for C and N are greater
  than in March. This was not expected. The data should be used with
  care pending further discussion.

meaning of 'flag', where 'nd' indicates no data:
          N = Particulate Organic Nitrogen flagged as suspect
          C = Total Particulate Carbon flagged as suspect
          C,N = Both Carbon and Nitrogen flagged as suspect
          C_to_N = Carbon Nitrogen ratio flagged as suspect, cannot easily 
                tell which parameter is suspect

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown Arabian Sea NSF	National Science Foundation

Instruments

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

CTD/Niskin Rosette bottles.

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 number from event log		event
sta_std	Arabian Sea standard station identifier		no_bcodmo_term
sta	station number from event log		no_bcodmo_term
cast	CTD rosette cast number from event log		cast
bot	CTD rosette bottle number		no_bcodmo_term
press	sample depth reported as pressure	decibars	press
POC	particulate organic carbon	micromoles/liter	POC
PON	particulate organic nitrogen	micromoles/liter	PON
C_to_N	carbon to nitrogen molar ratio		no_bcodmo_term
flag	flags to identify suspect values: N = Particulate Organic Nitrogen; C = Particulate Organic Carbon; C_and_N = Both Carbon and Nitrogen; C/N = Carbon:Nitrogen ratio; cannot easily tell which parameter is suspect		no_bcodmo_term
depth_n	nominal sample depth	meters	no_bcodmo_term

Database

Contribute Data

Dataset: poc_pon
Deployment: TT049

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: poc_ponDeployment: TT049

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: poc_pon
Deployment: TT049