Dataset: poc_pon
Deployment: TT054

Particulate Organic Carbon and Particulate Organic Nitrogen

Principal Investigator:

Farooq Azam (University of California-San Diego, UCSD-SIO)

Co-Principal Investigator:

David C. Smith (University of California-San Diego, UCSD-SIO)

BCO-DMO Data Manager:

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

Project:

U.S. JGOFS Arabian Sea (Arabian Sea)

Version:

June 6,1997

Deployment Synonyms:

TTN054, TN054, TTN-054

Version Date:

1997-06-06

Data URL:

https://www.bco-dmo.org/dataset-deployment/450693/data

Expand/Collapse All

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:              Farooq Azam and David Smith
   of:              Scripps Institute of Oceanography
   dataset:         Particulate Organic Carbon, Particulate Organic
                    Nitrogen data from CTD casts
   dates:           December 01, 1995 to December 26, 1995
   location:        N: 22.5005  S: 9.9789  W: 57.302  E: 68.7849
   project/cruise:  Arabian Sea/TTN-054 - Process Cruise 7 (Early NE Monsoon)
   ship:            Thomas Thompson
 
   Note:  The following events have no standard station assigned:
   event# 12250943 is site J1
   event# 12251908 is site E5

Farooq Azam and David C. Smith
Methodology for POC and PON measurements


Water from the CTD rosette was transferred to brown polyethylene or
polycarbonate bottles and shielded from light until filtration (within
two hours of sampling).  The bottles were rinsed with Milli-Q water
after each use and twice with sample before filling.  The water was
then filtered through combusted (4 hours at 480°C) Whatman GF/F
filters at a pressure differential of

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: TT054

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: poc_ponDeployment: TT054

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: poc_pon
Deployment: TT054