Dataset: NH4_NO3_PO4_SiO2
Deployment: OC415-04

Nutrient measurements from Niskin bottle samples

Principal Investigator:

James R. Ledwell (Woods Hole Oceanographic Institution, WHOI)

Technician:

Paul B. Henderson (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Project:

Eddies Dynamics, Mixing, Export, and Species composition (EDDIES)

Version:

13 March 2007

Deployment Synonyms:

EDDIES 2005 Tracer 2, OC415-4, OC415_T2

Version Date:

2007-03-13

Data URL:

https://www.bco-dmo.org/dataset-deployment/452314/data

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Description

Methodology: none provided with data. Analyses performed by Paul Henderson (phenderson@whoi.edu) at WHOI Nutrients Facility.

DMO note: The SiO4 silicate data were originally called SiO2; Paul Henderson in the nutrients facility confirmed the data are SiO4. Cast number was matched in the Niskin bottle data to retrieve event, date, time, lon and lat, as well as depth_n, press and depth.

Methods & Sampling

Dataset acquisition description

Deployment-specific acquisition description

 PI:              James Ledwell
 of:              Woods Hole Oceanographic Institution
 dataset:         Nutrient measurements from Niskin bottle samples
 dates:           01 September 2005 to 11 September 2005  (20050901-20050911)       
 location:        N: 30.460  S: 29.558  W: -70.374  E: -69.236 
 project/cruise:  EDDIES/OC415-4 2005 Tracer 2
 platform:        R/V Oceanus
 
 Methodology: none provided with data.  Analyses performed by Paul Henderson
              (phenderson@whoi.edu) at WHOI Nutrients Facility.
 
 Change history: 
    070305: original data contributed by email from Larry Anderson;
            /eddies/data/2005_data/oc415-4/nutrients/EddiesOC415-4.txt.1
    070309: prepared for OCB database by Nancy Copley (OCB DMO)
            and Cyndy Chandler (OCB DMO)
    070313: changed bot param name and reordered depths to match Niskin data
    070529: data is considered final; no change from preliminary version; 
            data identical to EddiesOC415-4.txt.1
    
DMO note: 
    The SiO4 silicate data were originally called SiO2; Paul Henderson 
    in the nutrients facility confirmed the data are SiO4. Cast number was 
    matched in the Niskin bottle data to retrieve event, date, time, lon and
    lat, as well as press and depth. Cast 5 data originally recorded on 
    nutrient sample log sheet as cast 6, but this was corrected after 
    Chief Scientist checked the original CTD cast log sheets.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Instruments

Niskin bottle

Supplied Description:

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	unique sampling event number from cruise event log	YYYYMMDDhhmm	event
date	date of cast (UTC)	YYYYMMDD	date
time	time of cast (UTC)	hhmm	time
lon	longitude, negative denotes West	decimal degrees	lon
lat	latitude, negative denotes South	decimal degrees	lat
cast	CTD cast number	dimensionless	cast
Nis	Niskin bottle order number	dimensionless	bottle
depth_n	nominal depth	meters	depth_n
press	pressure, from CTD	decibars	press
depth	depth, calculated from CTD pressure	meters	depth
SiO4	Silicate	micromoles/liter	SiO4
PO4	Phosphate	micromoles/liter	PO4
NO2_NO3	Nitrite plus Nitrate (NO2 in this region is essentially non-detectable)	micromoles/liter	NO3_NO2
bot	Niskin bottle number	dimensionless	bot
SID_nuts	sample ID; Nutrients	alphanumeric	sample

Database

Contribute Data

Dataset: NH4_NO3_PO4_SiO2
Deployment: OC415-04

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: NH4_NO3_PO4_SiO2Deployment: OC415-04

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: NH4_NO3_PO4_SiO2
Deployment: OC415-04