Dataset: GT10-11 - Fe Speciation
Deployment: KN204-01

Profiles of concentrations of dissolved iron-binding ligands and their respective conditional stability constants

Principal Investigator:

Kristen Nicolle Buck (Bermuda Institute of Ocean Sciences, BIOS)

BCO-DMO Data Manager:

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

Project:

U.S. GEOTRACES North Atlantic Transect (GA03) (U.S. GEOTRACES NAT)

Version:

Deployment Synonyms:

GA03, GT11, KN204-01A, KN204-01B, USGT-NAT-2011, USGNAZT, GNAT, 316N20111106, KN204-1

Version Date:

2016-12-08

Data URL:

https://www.bco-dmo.org/dataset-deployment/456000/data

Expand/Collapse All

Description

Concentrations of dissolved iron-binding ligands and their respective conditional stability constants in water column samples from full depth stations occupied during the first leg (KN199-4) of the U.S. GEOTRACES North Atlantic zonal transect cruises on the R/V Knorr in 2010.

The FISH and BOTTLE data have been split into separate columns as per GEOTRACES Parameter Naming Conventions. The FISH data are to the far right.

Versions:

version 6, 2016-12-08: separate columns for Fish and Bottle samples; quality flags added.
version 5, 19 Nov. 2014: Added L3 data.
version 4, 14 April 2014: Revised values for KN204-1 measurements.
version 3, 26 June 2013: KN199-04 station 7 values corrected.
version 2, 10 June 2013: KN199-04 data updated, KN204-01 data added.
version 1, 31 Dec. 2012: Initial data submitted.

Methods & Sampling

Dataset acquisition description

Sample collection and filtering: Water column samples were collected by the U.S. GEOTRACES sampling team from 24 modified 12 L Teflon-lined GoFlo samplers (General Oceanics) deployed on the GEOTRACES clean CTD rosette system. The U.S. GEOTRACES sampling team filtered the samples through 0.2 µm Supor Acropak filter cartridges (Pall) inside the U.S. GEOTRACES clean-air laboratory van. Near-surface samples (~2 m depth) were collected underway either on approach or leaving each station using the Ken Bruland lab towfish (“GeoFish”) deployed to collect surface samples from outside the wake of the ship. Seawater from the towfish was pumped directly into the Bruland lab clean air laboratory van and filtered through 0.2 µm Supor Acropak filter cartridges. Filtered seawater samples for Fe speciation (organic complexation) analyses were collected in 500 mL acid-cleaned Nalgene narrow-mouth fluorinated high-density polyethylene bottles that were conditioned with a Milli-Q fill for at least two weeks, and rinsed three times with filtered sample prior to sample collection. All filtered seawater samples for dissolved iron speciation from leg 1 were provided directly to the PI (Buck), who either analyzed the sample shipboard or froze the sample at -20 ºC for laboratory-based analyses post cruise.

Dissolved iron speciation (organic complexation) analyses: Dissolved Fe speciation (organic complexation) was analyzed using a competitive ligand exchange- adsorptive cathodic stripping voltammetry (CLE-ACSV) method with salicylaldoxime as the added competing ligand (Buck et al. 2007, 2010, 2012), modified from the original Rue and Bruland (1995) method. Dissolved Fe additions of 0 to 7.5 nM were used in the titrations, for a total of at least 10 points in each titration. Deposition times of 90 to 120 s were applied to the analyses. All analyses were performed on Bioanalytical Systems (BASi) Controlled Growth Mercury Electrodes (static mercury drop setting, size 14) with Epsilon e2 (BASi) electrochemical analyzers. There are no reference samples available for iron speciation/ organic complexation measurements of iron in seawater, though this method was shown to compare well with other labs and techniques in the GEOTRACES intercalibration exercises (Buck et al. 2012, 2016).

Data Processing Description

Dataset Processing Description

Dissolved iron (DFe) concentrations determined by flow injection analysis (FIA) in Peter Sedwick’s lab at Old Dominion University were used in the data interpretation to calculate ligand concentrations and conditional stability constants from the sample titrations. The DFe values used for this dataset are provided in the speciation submission for reference, please see Sedwick et al. (2015) for the complete dissolved iron data and methods.

Titration data was interpreted with a combination of Scatchard (Scatchard 1949) and van den Berg-Ruzic (Ruzic 1982; van den Berg 1982) linearization techniques, as has been described previously (Buck et al. 2012, 2015, 2016). An inorganic side reaction coefficient, a_Fe_¢, of 10¹⁰ was used in the iron speciation calculations (Buck et al. 2012). Ligand concentrations and conditional stability constants determined from each linearization of a titration dataset were then combined for a final ligand concentration and conditional stability constant for each sample. When available, results from replicate titration analyses were averaged together and the average with standard deviations of all sample titrations were then reported for each parameter in the spreadsheet.

The detection limit for the electroactive Fe-SA complex has been found to be 0.01 nM (Buck et al. 2007), calculated as three times the standard deviation of measured peak height from a 0.05 nM Fe addition to UV-oxidized and chelexed seawater with a 900 s deposition time. For a 90 s deposition time, the detection limit for Fe-SA is ~0.1 nM. Two stations from the US GTNA cruises (2010-Stn5 and 2010-Stn 9) were analyzed in triplicate complete titrations, typically two conducted shipboard and one in the laboratory after storing frozen (-20 ºC). Over the full water column from both stations, the average standard deviation from the triplicate titrations of each sample was 0.11 nM (n = 36 samples, 108 titrations), and three times this standard deviation estimates a detection limit for ligand concentrations of 0.33 nM. For log K₁ values of this ligand class, from the same profiles, the average standard deviation was 0.15 (log units).

Related files and references:

Buck, K. N., L. J. A. Gerringa, and M. J. A. Rijkenberg. 2016. An intercomparison of dissolved iron speciation at the Bermuda Atlantic Time-series Station (BATS): Results from the GEOTRACES Crossover Station A. Frontiers in Marine Biogeochemistry 3: article 262.

Buck, K. N., M. C. Lohan, C. J. M. Berger, and K. W. Bruland. 2007. Dissolved iron speciation in two distinct river plumes and an estuary: Implications for riverine iron supply. Limnology and Oceanography 52: 843-855.

Buck, K. N., K. E. Selph, and K. A. Barbeau. 2010. Iron-binding ligand production and copper speciation in an incubation experiment of Antarctic Peninsula shelf waters from the Bransfield Strait, Southern Ocean. Marine Chemistry 122: 148-159.

Buck, K. N., J. W. Moffett, K. A. Barbeau, R. M. Bundy, Y. Kondo, and J. Wu. 2012. The organic complexation of iron and copper: an intercomparison of competitive ligand exchange- adsorptive cathodic stripping voltammetry (CLE-ACSV) techniques. Limnology and Oceanography: Methods 10: 496-515.

Buck, K. N., B. Sohst, and P. N. Sedwick. 2015. The organic complexation of dissolved iron along the U.S. GEOTRACES (GA03) North Atlantic Section. Deep-Sea Research 116: 152-165.

Rue, E. L., and K. W. Bruland. 1995. Complexation of iron(III) by natural organic ligands in the Central North Pacific as determined by a new competitive ligand equilibration adsorptive cathodic stripping voltammetric method. Marine Chemistry 50: 117-138.

Ružić, I. 1982. Theoretical aspects of the direct titration of natural waters and its information yield for trace metal speciation. Analytica Chimica Acta 140: 99-113.

Scatchard, G. 1949. The attractions of proteins for small molecules and ions. Annals of the New York Academy of Sciences 51: 660-672.

Sedwick, P. N., B. M. Sohst, S. J. Ussher, and A. R. Bowie. 2015. A zonal picture of the water column distribution of dissolved iron(II) during the U.S. GEOTRACES North Atlantic transect cruise (GEOTRACES GA03). Deep-Sea Research II 116: 166-175.

van den Berg, C. M. G. 1982. Determination of copper complexation with natural organic ligands in sea water by equilibrium with MnO2: I. Theory. Marine Chemistry 11: 307-322.

FLAG: The standard Ocean Data View qualifying flags were used (reference all flags at https://www.bodc.ac.uk/data/codes_and_formats/odv_format/):

1: Good Value: Good quality data value that is not part of any identified malfunction and has been verified as consistent with real phenomena during the quality control process. [Used when data were shown to be reproducible]

2: Probably Good Value: Data value that is probably consistent with real phenomena but this is unconfirmed or data value forming part of a malfunction that is considered too small to affect the overall quality of the data object of which it is a part. [Used when the reported value reflects analysis of a single or unverified replicate]

3: Probably Bad Value: Data value recognized as unusual during quality control that forms part of a feature that is probably inconsistent with real phenomena. [Not used]

4: Bad Value: An obviously erroneous data value. [Not used]

5: Changed Value: Data value adjusted during quality control. [Not used]

6: Value Below Detection Limit: The level of the measured phenomenon was too small to be quantified by the technique employed to measure it. The accompanying value is the detection limit for the technique or zero if that value is unknown. [We report “not_detected” rather than zero or a detection limit value for this case]

7: Value in Excess: The level of the measured phenomenon was too large to be quantified by the technique employed to measure it. The accompanying value is the measurement limit for the technique. [Not used]

8: Interpolated Value: Tis value has been derived by interpoloation from other values in the data object. [Not used]

9: Missing Value: The data value is missing. Any accompanying value will be a magic number representing absent data. [Any missing data reflect samples that were not analyzed; “nd” = “no data” used for these parameters]

A: Value Phenomenon Uncertain: There is uncertainty in the description of the measured phenomenon associated with the value such as chemical species or biological entity. [Not used]

BCO-DMO Processing:
- added conventional header with dataset name, PI name, version date
- column names reformatted to comply with BCO-DMO or GEOTRACES standards
- joined submitted data with master event data: depth_GEOTRC_CTD, event_GEOTRC, instr, cast_GEOTRC, sample_GEOTRC, sample_bottle_GEOTRC, bottle_GEOTRC.
- changed 95%CI to stdev (standard deviation) in headers as per email 2016-12-007 from KB
- changed latitude and longitude for GeoFish samples from 'towfish position' to 'nd' (no data)
- converted longitude to negative degrees

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0927453	NSF Division of Ocean Sciences

Instruments

BASi Controlled Growth Mercury Electrode

Supplied Description:

Controlled Growth Mercury Electrodes on Static Mercury Drop Electrode (SMDE) setting, size 14.

Instrument Type

Generic Name: BASi Controlled Growth Mercury Electrode

Acronym: BASI CGME

Generic Description:

Bioanalytical Systems (BASi) Mercury drop electrodes are generated by the BASi Controlled Growth Mercury Electrode (CGME) in three modes:

DME (Dropping Mercury Electrode) - mercury is allowed to flow freely from the reservoir down the capillary and so the growth of the mercury drop and its lifetime is controlled by gravity. (The optional 100 um capillary is recommended for this mode.)

SMDE (Static Mercury Drop Electrode) - the drop size is determined by the length of time for which the fast-response capillary valve is opened, and the drop is dislodged by a drop knocker. The dispense/knock timing is microprocessor-controlled and is typically coordinated with the potential pulse or square-wave waveform. This mode can also used to generate the Hanging Mercury Drop Electrode required for stripping experiments.

CGME (Controlled Growth Mercury Electrode) - the mercury drop is grown by a series of pulses that open the capillary valve. The number of pulses, their duration, and their frequency can be varied by PC control, providing great flexibility in both the drop size and its rate of growth. This CGME mode can be used for both polarographic and stripping experiments.

http://www.basinc.com/products/ec/cgme.php

BASi EC-epsilon 2 Autoanalyzer

Supplied Name: Autoanalyzer BASi EC-epsilon 2

Supplied Description:

All analyses were performed on Bioanalytical Systems (BASi) Controlled Growth Mercury Electrodes (static mercury drop setting, size 14) with Epsilon 2 (BASi) electrochemical analyzers.

Instrument Type

Generic Name: BASi EC-epsilon 2 Autoanalyzer

Acronym: BASi EC-epsilon 2

Generic Description:

The Bioanalytical Systems EC epsilon is a family of potentiostat/galvanostats for electrochemistry. The most basic epsilon instrument can be used for standard techniques, as well as chronopotentiometry for materials characterization (e.g., characterization of transition metal complexes by cyclic voltammetry and controlled potential electrolysis, or of biosensors by cyclic voltammetry and constant potential amperometry). Pulse, square wave, and stripping techniques can be added by a software upgrade, and a second channel can be added by a hardware upgrade.

http://www.basinc.com/products/ec/epsilon/

GeoFish Towed near-Surface Sampler

Supplied Name: GeoFish

Supplied Description:

Instrument Type

Generic Name: GeoFish Towed near-Surface Sampler

Acronym: GeoFish

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/31/

Generic Description:

The GeoFish towed sampler is a custom designed near surface (<2m) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz).

GO-FLO Teflon Trace Metal Bottle

Supplied Name: GO-FLO Teflon Trace Metal

Supplied Description:

24 modified 12 L Teflon-lined GoFlo samplers (General Oceanics)

Instrument Type

Generic Name: GO-FLO Teflon Trace Metal Bottle

Acronym: GO-FLO Teflon TM

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/30/

Generic Description:

GO-FLO Teflon-lined Trace Metal free sampling bottles are used for collecting water samples for trace metal, nutrient and pigment analysis. The GO-FLO sampling bottle is designed specifically to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Official cruise identifier e.g. KN199-04 = R/V Knorr cruise number 199-04.	unitless	cruise_id
cruise_name	GEOTRACES cruise name	unitless	cruise_name
station_GEOTRC	GEOTRACES station number; ranges from 1 through 12 for KN199-04 and 1 through 24 for KN204-01. Stations 7 and 9 were skipped on KN204-01. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'STNNBR'; this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.	unitless	station
depth_GEOTRC_CTD	sample collection depth below sea surface; . GeoFish sample assigned 2 m depth. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	meters	depth
event_GEOTRC	Unique identifying number for US GEOTRACES sampling events; ranges from 2001 to 2225 for KN199-04 events and from 3001 to 3282 for KN204-01 events. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	unitless	event
cast_GEOTRC	Cast identifier numbered consecutively within a station. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	unitless	cast
lat	Station latitude; north is positive: position when sampling cast was started (2 m sample = underway sample collected typically on approach to station)	decimal degrees	lat
lon	Station longitude; east is positive; position when sampling cast was started (2 m sample = underway sample collected typically on approach to station)	decimal degrees	lon
date	GMT date when rosette cast was started; formatted as yyyymmdd	year-month-day	date
BTL_ISO_DateTime_UTC	Date and time (UTC) variable recorded at the bottle sampling time in ISO compliant format. Values were added from the intermediate US GEOTRACES master file (see Processing Description). This standard is based on ISO 8601:2004(E) and takes on the following form: 2009-08-30T14:05:00[.xx]Z (UTC time)	year-month-day-hour-minute-second	ISO_DateTime_UTC
instr	Unique identifying number for US GEOTRACES instruments. Added by BCO-DMO from the intermediate US GEOTRACES NAT master file.	unitless	instrument
sample_GEOTRC	Unique identifying number for US GEOTRACES samples. PI-supplied values were identical to those in the intermediate US GEOTRACES NAT master file	unitless	sample
sample_bottle_GEOTRC	Unique identification numbers given to samples taken from bottles; ranges from 1 to 24; often used synonymously with bottle number. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	unitless	bot_Nis
bottle_GEOTRC	Alphanumeric characters identifying bottle type (e.g. NIS representing Niskin and GF representing GOFLO) and position on a CTD rosette. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	unitless	bottle
STORAGE	sample storage prior to analyses are noted as follows: 1 = sample not analyzed; these are noted also as nd" = "no data"; 2 = sample analyzed shipboard (not frozen); 3 = sample analyzed frozen (-20 ºC); 4 = sample analyzed both shipboard and again after freezing."	unitless	no_bcodmo_term
N_TITRATIONS	number of titrations performed for sample analyses	titrations	no_bcodmo_term
Fe_D_CONC_BOTTLE	Dissolved iron (Fe) concentration value from bottle samples used in the speciation data interpretation. Peter Sedwick’s lab at Old Dominion University; contact Sedwick for additional information.	nanomoles/liter (10^-9 M)	Fe
L1Fe_D_CONC_BOTTLE	concentration of dissolved iron-binding ligand from bottle samples with log K1 >= 12. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L1_FLAG	L1 quality flag	unitless	q_flag
L1_stdev	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L1Fe_D_LogK_BOTTLE	log conditional stability constant from bottle samples of L1 complexes with iron (logK^cond FeL1.Fe'). "not_detected" used when this parameter was not determined in sample analyses.	No units; K1 has units of M-1	no_bcodmo_term
log_K1_FLAG	log K1 quality flag	unitless	q_flag
log_K1_stdev	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	No units; K1 has units of M-1	std_dev
L2Fe_D_CONC_BOTTLE	concentration of dissolved iron-binding ligand with log K2 = 11-12 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L2_FLAG	L2 quality flag	unitless	q_flag
L2_stdev	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L2Fe_D_LogK_BOTTLE	log conditional stability constant of L2 complexes with iron (logK^cond FeL2.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	No units; K2 has units of M^-1	no_bcodmo_term
log_K2_FLAG	log K2 quality flag	unitless	q_flag
log_K2_stdev	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses	No units; K2 has units of M^-1	std_dev
L3Fe_D_CONC_BOTTLE	concentration of dissolved iron-binding ligand with log K3 = 10-11 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L3_FLAG	L3 quality flag	unitless	q_flag
L3_stdev	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L3Fe_D_LogK_BOTTLE	log conditional stability constant of L3 complexes with iron (logK^cond FeL3.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	No units; K3 has units of M^-1	no_bcodmo_term
log_K3_FLAG	log K3 quality flag	unitless	q_flag
log_K3_stdev	standard deviation of averaged results from replicate titrations; only available for samples with replicate titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	No units; K3 has units of M^-1	std_dev
Fe_D_CONC_FISH	Dissolved iron (Fe) concentration value from bottle samples used in the speciation data interpretation. Peter Sedwick’s lab at Old Dominion University; contact Sedwick for additional information.	nanomoles/liter (10^-9 M)	Fe
L1Fe_D_CONC_FISH	concentration of dissolved iron-binding ligand from bottle samples with log K1 >= 12. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L1_FLAG_FISH	L1 quality flag	unitless	q_flag
L1_stdev_FISH	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L1Fe_D_LogK_FISH	log conditional stability constant from bottle samples of L1 complexes with iron (logK^cond FeL1.Fe'). "not_detected" used when this parameter was not determined in sample analyses.	No units; K1 has units of M-1	no_bcodmo_term
log_K1_FLAG_FISH	log K1 quality flag	unitless	q_flag
log_K1_stdev_FISH	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	No units; K1 has units of M-1	std_dev
L2Fe_D_CONC_FISH	concentration of dissolved iron-binding ligand with log K2 = 11-12 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L2_FLAG_FISH	L2 quality flag	unitless	q_flag
L2_stdev_FISH	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L2Fe_D_LogK_FISH	log conditional stability constant of L2 complexes with iron (logK^cond FeL2.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	No units; K2 has units of M^-1	no_bcodmo_term
log_K2_FLAG_FISH	log K2 quality flag	unitless	q_flag
log_K2_stdev_FISH	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses	No units; K2 has units of M^-1	std_dev
L3Fe_D_CONC_FISH	concentration of dissolved iron-binding ligand with log K3 = 10-11 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	nanomoles/liter (10^-9 M)	trace_metal_conc
L3_FLAG_FISH	L3 quality flag	unitless	q_flag
L3_stdev_FISH	standard deviation of averaged results from replicate analyses; only available for samples with n>1 titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	nanomoles/liter (10^-9 M)	std_dev
L3Fe_D_LogK_FISH	log conditional stability constant of L3 complexes with iron (logK^cond FeL3.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.	No units; K3 has units of M^-1	no_bcodmo_term
log_K3_FLAG_FISH	log K3 quality flag	unitless	q_flag
log_K3_stdev_FISH	standard deviation of averaged results from replicate titrations; only available for samples with replicate titrations. "nd = no data" used when standard deviations were not available either because of single replicate sample analyses or this ligand classes was not detected in the analyses.	No units; K3 has units of M^-1	std_dev

Database

Contribute Data

Dataset: GT10-11 - Fe Speciation
Deployment: KN204-01

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: GT10-11 - Fe SpeciationDeployment: KN204-01

Dataset acquisition description

Dataset Processing Description

Dataset: GT10-11 - Fe Speciation
Deployment: KN204-01