Dataset: ETNP Iodine Speciation
Deployment: RR1804

Iodine Speciation

Principal Investigator:

James W. Moffett (University of Southern California, USC)

Contact:

Rintaro Moriyasu (University of Southern California, USC)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

The role of cryptic nutrient cycling within sinking particles on trace element transport in oxygen minimum zones (OMZ Nutrient Cycling)

Data URL:

https://www.bco-dmo.org/dataset-deployment/776852/data

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Description

Iodine speciation measurements aboard R/V Roger Revelle and R/V Falkor in April and June 2018, respectively.

Methods & Sampling

Dataset acquisition description

Iodate was measured using spectrophotometry based off of Rue et al. 1997. Iodide measured voltammetry based off of Luther et al. 1988. Iodate was converted to triiodide and measured on the spectrophotometer at 350 nm. Iodide was measured on a hanging drop mercury electrode at approximately -0.3 V. Excel was used to process CSV files from the spectrophotometer. Excel was also used to process data from the voltammeter.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- concatenated RR1804 and FK18
- added cruise_id and ISO_DateTime columns
- rounded iodine columns to 1 decimal place for the FK180624 cruise records

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1636332	NSF Division of Ocean Sciences

Instruments

Perkin Elmer Lambda 35 Spectrophotometer

Supplied Name: Perkin Elmer Lamda 35

Supplied Description:

Instrument Type

Generic Name: Perkin Elmer Lambda 35 Spectrophotometer

Acronym: Perkin Elmer Lambda 35

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

The Lambda 35 is a double beam UV/Vis spectrophotometer from Perkin Elmer, packing pre-aligned Tungsten and Deuterium Lamps. It has a wavelength range of 190-1100nm and a variable bandwidth range of 0.5 to 4nm.

Voltammetry Analyzers

Supplied Name: BASi Controlled Growth Mercury Electrode

Supplied Description:

Instrument Type

Generic Name: Voltammetry Analyzers

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB35/

Generic Description:

Instruments that obtain information about an analyte by applying a potential and measuring the current produced in the analyte.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Bottle	bottle number	unitless	bottle
Station	station number	unitless	station
Depth	depth	meters	depth
Iodate	iodate concentration	nanoMolar	no_bcodmo_term
Iodide	iodide concentration	nanoMolar	iodide
Total_Iodine	total iodine concentration	nanoMolar	iodide
Excess_Iodine	excess iodine concentration	nanoMolar	iodide
Longitude	longitude; east is positive	decimal degrees	lon
Latitude	latitude; north is positive	decimal degrees	lat
Date	sampling date	unitless	date
Time_UTC	UTC time	unitless	time_utc
source_file	name of submitted file	unitless	file_name
ISO_DateTime_UTC	ISO formatted UTC date and time	unitless	ISO_DateTime_UTC
cruise_id	cruise identifier	unitless	cruise_id

Database

Contribute Data

Dataset: ETNP Iodine Speciation
Deployment: RR1804

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: ETNP Iodine SpeciationDeployment: RR1804

Dataset acquisition description

Dataset Processing Description

Dataset: ETNP Iodine Speciation
Deployment: RR1804