http://lod.bco-dmo.org/id/dataset/936824
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2024-09-09
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved iron concentrations and stable isotope ratios from water column samples collected during four Bermuda Atlantic Iron Time-series (BAIT) cruises EN631, AE1909, AE1921, AE1930 in the Western Subtropical North Atlantic Gyre in 2019
2024-09-17
publication
2024-09-17
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2024-09-17
publication
https://doi.org/10.26008/1912/bco-dmo.936824.1
Timothy M. Conway
University of South Florida
principalInvestigator
Rene Maurice Boiteau
Oregon State University
principalInvestigator
Eniko Toth
University of South Florida
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Conway, T. M., Boiteau, R. M., Toth, E. (2024) Dissolved iron concentrations and stable isotope ratios from water column samples collected during four Bermuda Atlantic Iron Time-series (BAIT) cruises EN631, AE1909, AE1921, AE1930 in the Western Subtropical North Atlantic Gyre in 2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-09-17 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.936824.1 [access date]
2019 BAIT / GApr13 Dissolved Iron Concentration and Isotopes Dataset Description: <p>The primary data file "936824_v1_bait_dissolved_fe_and_isotopes.csv" includes data from all four cruises. Data from each cruise is also provided separately in the attached Supplemental Files (csv format). The Supplemental Files include the unique GEOTRACES barcodes assigned to each parameter from each cruise. These barcodes are used by the GEOTRACES program for data tracking purposes.</p> Methods and Sampling: <p>Water-column samples for trace metal measurements were collected from the Bermuda Atlantic Time-Series (BATS) site (31°40'N, 64°10'W) and adjacent BATS spatial stations during cruises in March (spring), May (early summer), August (late summer) and November (fall) 2019 aboard R/V Atlantic Explorer and R/V Endeavor.</p>
<p>Seawater samples and hydrographic data were collected using a trace-metal clean conductivity-temperature-depth sensor (SBE 19 plus, SeaBird Electronics) mounted on a custom-built trace-metal clean carousel (SeaBird Electronics) fitted with custom-modified 5-liter (L) Teflon-lined external-closure Niskin-X samplers (General Oceanics) and deployed on an Amsteel non-metallic line. On the August cruise, we also collected near-surface samples (small boat) (~0.3 meters (m) depth) in a Niskin-X sampler deployed from an inflatable dinghy ~500 m upwind of the research vessel, to avoid contamination from the ship. After recovery, the seawater samples were filtered through pre-cleaned 0.2-micrometer (μm) pore AcroPak Supor filter capsules (Pall) using filtered nitrogen gas inside a shipboard clean laboratory (Sedwick et al., 2020; Tagliabue et al., 2023) into acid-cleaned 1L LDPE bottles.</p>
<p>Samples were acidified back on shore at the University of South Florida (USF) using 1.2 milliliter (mL) 10 M Teflon-distilled HCl per liter of sample and stored for at least 12 months before processing. Seawater samples were then processed for dissolved iron (Fe) isotope and concentration analysis at the University of South Florida following Sieber et al. (2019), modified from Conway et al. (2013). Briefly, an Fe double-spike was added prior to batch extraction using Nobias PA-1 chelating resin, followed by purification by anion-exchange chromatography using AG-MP1 resin. Concentration and isotope analyses were performed on a Thermo Neptune Plus MC-ICPMS in the Tampa Bay Plasma Facility at the University of South Florida using the double spike technique via a ~100 microliters per minute (uL min-1) PFA nebulizer and Apex Ω introduction introduction system, Pt Jet Sampler cone and an Al X skimmer cone.</p>
<p>Fe stable isotope ratios are expressed in delta notation (δ56Fe) relative to the IRMM-014 standard. A secondary Fe standard, NIST-3126, was analyzed over 44 sessions to provide an estimate of long-term instrumental precision. We obtain a value of +0.36 ± 0.05‰ (2SD, n = 524; runs = 37), in agreement with consensus values (Hunt et al. 2022; Conway et al., 2013). Therefore, we consider a 2SD uncertainty of 0.05‰ as an estimate of analytical precision, and have applied it to all samples, except for low concentration samples where the larger internal error is considered a more conservative estimate of uncertainty. Concentrations were calculated using the isotope dilution technique based on on-peak blank, interference and mass-bias corrected 57Fe/56Fe ratios measured simultaneously with isotope analysis. We express uncertainty (1SD) on Fe concentrations as 2%, based on Conway et al. (2013).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1829833 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1829833
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1829643 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1829643
completed
Timothy M. Conway
University of South Florida
727-258-1081
College of Marine Sciences 830 1st St SE
St. Petersburg
FL
33701
USA
tmconway@usf.edu
pointOfContact
Rene Maurice Boiteau
Oregon State University
612-625-6983
228 Smith Hall 207 Pleasant Street Se
Minneapolis
MN
55455
USA
rboiteau@umn.edu
pointOfContact
Eniko Toth
University of South Florida
ertoth@usf.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise_ID
Station_ID
Start_Date_UTC
Start_Latitude
Start_Longitude
Sample_ID
Sample_Depth
Fe_56_54_D_DELTA_BOTTLE
SD1_Fe_56_54_D_DELTA_BOTTLE
Flag_Fe_56_54_D_DELTA_BOTTLE
Fe_D_CONC_BOTTLE
SD1_Fe_D_CONC_BOTTLE
Flag_Fe_D_CONC_BOTTLE
Fe_56_54_D_DELTA_BOAT_PUMP
SD1_Fe_56_54_D_DELTA_BOAT_PUMP
Flag_Fe_56_54_D_DELTA_BOAT_PUMP
Fe_D_CONC_BOAT_PUMP
SD1_Fe_D_CONC_BOAT_PUMP
Flag_Fe_D_CONC_BOAT_PUMP
SBE 19 plus, SeaBird Electronics
Thermo Neptune Plus MC-ICPMS
Niskin-X
theme
None, User defined
Cruise identfier
station
date
latitude
longitude
sample identification
depth
Iron
quality flag
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Multi Collector Inductively Coupled Plasma Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
EN631
AE1909
AE1921
AE1930
service
Deployment Activity
Bermuda Atlantic Time-Series Study region, waters of the western Subtropical North Atlantic Gyre (ca. 30°N-33°N, 62°W-65°W)
Western North Atlantic; Bermuda Atlantic Time-Series Study region, waters of the western Subtropical North Atlantic Gyre (ca. 30°N-33°N, 62°W-65°W)
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
U.S. GEOTRACES
http://www.geotraces.org/
U.S. GEOTRACES
GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation.
GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters;
* To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and
* To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column.
GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies.
Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects.
U.S. GEOTRACES
largerWorkCitation
program
NSFGEO-NERC: Collaborative Research: Using Time-series Field Observations to Constrain an Ocean Iron Model
https://osprey.bco-dmo.org/project/822807
NSFGEO-NERC: Collaborative Research: Using Time-series Field Observations to Constrain an Ocean Iron Model
<p><strong><em>NSF and NERC Award Abstract:</em></strong><br />
Iron is an essential nutrient for the growth of phytoplankton in the oceans. As such, iron plays key roles in regulating marine primary production and the cycling of carbon. It is thus important that models of ocean biology and chemistry consider iron, in order to explore past, present and future variations in marine productivity and the role of the ocean in the global carbon cycle. In this joint project involving researchers in the U.S. and the U.K., supported by both NSF and the Natural Environment Research Council (U.K.), field data from the Bermuda Atlantic Time-series Study (BATS) region will be combined with an established, state-of-the-art ocean biogeochemical model. By leveraging the known seasonal-scale physical, chemical and biological changes in the BATS region, the oceanographic context provided by the BATS core data, and an existing model of the regional physical circulation, the proposed study will yield process-related information that is of general applicability to the open ocean. In particular, the proposed research will focus on understanding the atmospheric input, biological uptake, regeneration and scavenging removal of dissolved iron in the oceanic water column, which have emerged as major uncertainties in the ocean iron cycle. The project will include significant educational and training contributions at the K-12, undergraduate, graduate and postdoctoral levels, as well as public outreach efforts that aim to explain the research and its importance.</p>
<p>The ability of ocean models to simulate iron remains crude, owing to an insufficient understanding of the mechanisms that drive variability in dissolved iron, particularly the involvement of iron-binding ligands, colloids and particles in the surface input, biological uptake, regeneration and scavenging of dissolved iron in the upper ocean. Basin-scale data produced by the GEOTRACES program provide an important resource for testing and improving models and, by extension, our mechanistic understanding of the ocean iron cycle. However such data provide only quasi-synoptic 'snapshots', which limits their utility in isolating and identifying the processes that control dissolved iron in the upper ocean. The proposed research aims to provide mechanistic insight into these governing processes by combining time-series data from the BATS region with numerical modeling experiments. Specifically, seasonally resolved data on the vertical (upper 2,000 meters) and lateral (tens of kilometers) distributions of particulate, dissolved, colloidal, soluble and ligand-bound iron species will be obtained from the chemical analysis of water column samples collected during five cruises, spanning a full annual cycle, shared with the monthly BATS program cruises. These data, along with ancillary data from the BATS program, will be used to test and inform numerical modeling experiments, and thus derive an improved understanding of the mechanisms that control the distribution and dynamics of dissolved iron in the oceanic water column.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
<p>This is a project jointly funded by the National Science Foundation’s Directorate for Geosciences (NSF/GEO) and the National Environment Research Council (NERC) of the United Kingdom (UK). </p>
BAIT
largerWorkCitation
project
Collaborative Research: Determining the isotopic signature of iron released via ligand-mediated dissolution of atmospheric dust in the surface ocean
https://osprey.bco-dmo.org/project/883936
Collaborative Research: Determining the isotopic signature of iron released via ligand-mediated dissolution of atmospheric dust in the surface ocean
<p><em>NSF Award Abstract:</em><br />
Iron (Fe) is a crucial nutrient for microbial growth in the oceans, impacting the carbon cycle and the climate system, but Fe does not dissolve readily in seawater and so its availability limits phytoplankton growth over much of the surface oceans. One of the most significant ways by which Fe reaches the surface oceans is through deposition of wind-blown dust; however, for this Fe to be available for biological growth, it must dissolve and be kept in solution bound to organic molecules. Despite this known importance, the mechanisms of dust dissolution and the identity of the organic molecules keeping Fe in solution remain poorly understood. This study will focus on using laboratory and field experiments to better understand how natural organic molecules present in seawater enhance the release of Fe from Saharan desert dust, the organic molecules produced by microbes in response to dust, the isotopic fractionation of Fe associated with dust dissolution, and ultimately the role of ligand-mediation dissolution in determining the role of dust in the marine Fe cycle. For outreach activities, the proposers would tutor refugee high school students from Africa/Asia in math and science to help them get integrated into the U.S. school system and discuss science with the public by participation in the St. Petersburg Science Festival. Three graduate students and undergraduate interns would be supported and trained as part of this project.</p>
<p>Scientists from the University of South Florida and Oregon State University will collect natural North Atlantic dust at the Tudor Hill Tower on Bermuda over a yearly cycle and characterize the weekly bulk and water-soluble Fe isotopic and elemental composition of the dust. Appropriate subsamples of this dust, representing both the Saharan and non-Saharan (anthropogenically-influenced) seasons will then be dissolved in seawater, with dissolution mediated by ligands with a range of Fe binding stability constants (natural ligands as well as defined marine siderophores). Incubations of dust will also be carried out with natural biological communities collected from the Gulf of Mexico and at the Bermuda Atlantic Time Series site in the North Atlantic. The investigators will characterize the amount and isotopic signature of the Fe released in each experiment, the microbial community response to dust in the incubations (DNA, cell counting and identification), and the ligands present in the natural organic matter used for experiments and produced in the incubations. Comparison of the abiotic and biological experiments will allow investigation of the magnitude of the biological effects on dust dissolution. The experiments will allow the investigators to provide a mechanistic understanding of factors that affect dust dissolution rates, especially the role of different specific organic ligands in enhancing and stabilizing the release of iron in the surface ocean, and the net signature of iron released. From this, the investigators will provide new constraints for the marine iron isotope cycle in the ocean, specifically testing the hypothesis that the net release of Fe from dust is isotopically heavy due to complexation with organic ligands, but that the size of this fractionation depends on the binding strength and presence of different ligands. The outcomes of this process study will provide a framework for models and interpretation of large scale field studies such as GEOTRACES, as well as enhancing the research community's ability to interpret aerosol and oceanic iron isotope data.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Dust Ligand Interactions
largerWorkCitation
project
eng; USA
oceans
Bermuda Atlantic Time-Series Study region, waters of the western Subtropical North Atlantic Gyre (ca. 30°N-33°N, 62°W-65°W); Western North Atlantic; Bermuda Atlantic Time-Series Study region, waters of the western Subtropical North Atlantic Gyre (ca. 30°N-33°N, 62°W-65°W)
-64.815
-63.58
31.177
32.151
2019-03-11
2019-11-21
From projects that focused on the following 2 locations: 1. Bermuda Atlantic Time-Series Study region, waters of the western Subtropical North Atlantic Gyre (ca. 30°N-33°N, 62°W-65°W) 2. North Atlantic Subtropical Gyre
0
BCO-DMO catalogue of parameters from Dissolved iron concentrations and stable isotope ratios from water column samples collected during four Bermuda Atlantic Iron Time-series (BAIT) cruises EN631, AE1909, AE1921, AE1930 in the Western Subtropical North Atlantic Gyre in 2019
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/936874.rdf
Name: Cruise_ID
Units: unitless
Description: <p>Cruise ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/936875.rdf
Name: Station_ID
Units: unitless
Description: <p>Sampling station ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/936876.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>Sampling date</p>
http://lod.bco-dmo.org/id/dataset-parameter/936877.rdf
Name: Start_Latitude
Units: decimal degrees North
Description: <p>Latitude of station location</p>
http://lod.bco-dmo.org/id/dataset-parameter/936878.rdf
Name: Start_Longitude
Units: decimal degrees East
Description: <p>Longitude of sampling location</p>
http://lod.bco-dmo.org/id/dataset-parameter/936879.rdf
Name: Sample_ID
Units: unitless
Description: <p>Unique BAIT sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/936880.rdf
Name: Sample_Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/936881.rdf
Name: Fe_56_54_D_DELTA_BOTTLE
Units: per mil (‰)
Description: <p>Dissolved δ56Fe; from bottle samples</p>
http://lod.bco-dmo.org/id/dataset-parameter/936882.rdf
Name: SD1_Fe_56_54_D_DELTA_BOTTLE
Units: per mil (‰)
Description: <p>One standard deviation of Fe_56_54_D_DELTA_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/936884.rdf
Name: Flag_Fe_56_54_D_DELTA_BOTTLE
Units: unitless
Description: <p>Quality flag for Fe_56_54_D_DELTA_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/936885.rdf
Name: Fe_D_CONC_BOTTLE
Units: nanomoles per kilogram (nmol/kg)
Description: <p>Dissolved iron; from bottle samples</p>
http://lod.bco-dmo.org/id/dataset-parameter/936886.rdf
Name: SD1_Fe_D_CONC_BOTTLE
Units: nanomoles per kilogram (nmol/kg)
Description: <p>One standard deviation of Fe_D_CONC_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/936887.rdf
Name: Flag_Fe_D_CONC_BOTTLE
Units: unitless
Description: <p>Quality flag for Fe_D_CONC_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/936888.rdf
Name: Fe_56_54_D_DELTA_BOAT_PUMP
Units: per mil (‰)
Description: <p>Dissolved δ56Fe; near-surface samples; AE1921 cruise only</p>
http://lod.bco-dmo.org/id/dataset-parameter/936889.rdf
Name: SD1_Fe_56_54_D_DELTA_BOAT_PUMP
Units: per mil (‰)
Description: <p>One standard deviation of Fe_56_54_D_DELTA_BOAT_PUMP</p>
http://lod.bco-dmo.org/id/dataset-parameter/936890.rdf
Name: Flag_Fe_56_54_D_DELTA_BOAT_PUMP
Units: unitless
Description: <p>Quality flag for Fe_56_54_D_DELTA_BOAT_PUMP</p>
http://lod.bco-dmo.org/id/dataset-parameter/936891.rdf
Name: Fe_D_CONC_BOAT_PUMP
Units: nanomoles per kilogram (nmol/kg)
Description: <p>Dissolved iron; near-surface samples; AE1921 cruise only</p>
http://lod.bco-dmo.org/id/dataset-parameter/936892.rdf
Name: SD1_Fe_D_CONC_BOAT_PUMP
Units: nanomoles per kilogram (nmol/kg)
Description: <p>One standard deviation of Fe_D_CONC_BOAT_PUMP</p>
http://lod.bco-dmo.org/id/dataset-parameter/936893.rdf
Name: Flag_Fe_D_CONC_BOAT_PUMP
Units: unitless
Description: <p>Quality flag for Fe_D_CONC_BOAT_PUMP</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
13947
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/8ae8a7ee-0237-4236-94c4-b88300f794cd/content
download
https://doi.org/10.26008/1912/bco-dmo.936824.1
download
onLine
dataset
<p>Water-column samples for trace metal measurements were collected from the Bermuda Atlantic Time-Series (BATS) site (31°40'N, 64°10'W) and adjacent BATS spatial stations during cruises in March (spring), May (early summer), August (late summer) and November (fall) 2019 aboard R/V Atlantic Explorer and R/V Endeavor.</p>
<p>Seawater samples and hydrographic data were collected using a trace-metal clean conductivity-temperature-depth sensor (SBE 19 plus, SeaBird Electronics) mounted on a custom-built trace-metal clean carousel (SeaBird Electronics) fitted with custom-modified 5-liter (L) Teflon-lined external-closure Niskin-X samplers (General Oceanics) and deployed on an Amsteel non-metallic line. On the August cruise, we also collected near-surface samples (small boat) (~0.3 meters (m) depth) in a Niskin-X sampler deployed from an inflatable dinghy ~500 m upwind of the research vessel, to avoid contamination from the ship. After recovery, the seawater samples were filtered through pre-cleaned 0.2-micrometer (μm) pore AcroPak Supor filter capsules (Pall) using filtered nitrogen gas inside a shipboard clean laboratory (Sedwick et al., 2020; Tagliabue et al., 2023) into acid-cleaned 1L LDPE bottles.</p>
<p>Samples were acidified back on shore at the University of South Florida (USF) using 1.2 milliliter (mL) 10 M Teflon-distilled HCl per liter of sample and stored for at least 12 months before processing. Seawater samples were then processed for dissolved iron (Fe) isotope and concentration analysis at the University of South Florida following Sieber et al. (2019), modified from Conway et al. (2013). Briefly, an Fe double-spike was added prior to batch extraction using Nobias PA-1 chelating resin, followed by purification by anion-exchange chromatography using AG-MP1 resin. Concentration and isotope analyses were performed on a Thermo Neptune Plus MC-ICPMS in the Tampa Bay Plasma Facility at the University of South Florida using the double spike technique via a ~100 microliters per minute (uL min-1) PFA nebulizer and Apex Ω introduction introduction system, Pt Jet Sampler cone and an Al X skimmer cone.</p>
<p>Fe stable isotope ratios are expressed in delta notation (δ56Fe) relative to the IRMM-014 standard. A secondary Fe standard, NIST-3126, was analyzed over 44 sessions to provide an estimate of long-term instrumental precision. We obtain a value of +0.36 ± 0.05‰ (2SD, n = 524; runs = 37), in agreement with consensus values (Hunt et al. 2022; Conway et al., 2013). Therefore, we consider a 2SD uncertainty of 0.05‰ as an estimate of analytical precision, and have applied it to all samples, except for low concentration samples where the larger internal error is considered a more conservative estimate of uncertainty. Concentrations were calculated using the isotope dilution technique based on on-peak blank, interference and mass-bias corrected 57Fe/56Fe ratios measured simultaneously with isotope analysis. We express uncertainty (1SD) on Fe concentrations as 2%, based on Conway et al. (2013).</p>
Specified by the Principal Investigator(s)
<p>Data were processed in Microsoft Excel using an-in house double spike reduction scheme from Sieber et al. (2021), based on Siebert et al. (2001).</p>
Specified by the Principal Investigator(s)
To create the combined data file:
- Imported 4 original files into the BCO-DMO system: "AE1909_dataTemplate.xlsx", "AE1921_dataTemplate.xlsx", "AE1930_dataTemplate.xlsx", and "EN631_dataTemplate.xlsx".
- Renamed fields to comply with BCO-DMO naming conventions.
- Renamed "SD2_Fe_56_54_D_DELTA_BOTTLE" to "SD1_Fe_56_54_D_DELTA_BOTTLE" (AE1909 file).
- Concatenated data from separate cruises into a single data file; added column for Cruise_ID.
- Converted date column to YYYY-MM-DD format.
- Removed empty columns: Event_ID, Gear_ID, Start_Time_UTC, End_Date_UTC, End_Time_UTC, End_Latitude, End_Longitude, Rosette_Position.
- Saved the final file as "936824_v1_bait_dissolved_fe_and_isotopes.csv".
For the supplemental files:
- Imported 4 original files into the BCO-DMO system: "AE1909_dataTemplate.xlsx", "AE1921_dataTemplate.xlsx", "AE1930_dataTemplate.xlsx", and "EN631_dataTemplate.xlsx".
- Saved the files in CSV format.
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
SBE 19 plus, SeaBird Electronics
SBE 19 plus, SeaBird Electronics
PI Supplied Instrument Name: SBE 19 plus, SeaBird Electronics Instrument Name: CTD Sea-Bird Instrument Short Name:CTD Sea-Bird Instrument Description: A Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics. This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/ Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Thermo Neptune Plus MC-ICPMS
Thermo Neptune Plus MC-ICPMS
PI Supplied Instrument Name: Thermo Neptune Plus MC-ICPMS Instrument Name: Multi Collector Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:MC-ICPMS Instrument Description: A Multi Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is a type of mass spectrometry where the sample is ionized in a plasma (a partially ionized gas, such as Argon, containing free electrons) that has been generated by electromagnetic induction. A series of collectors is used to detect several ion beams simultaneously.
A MC-ICPMS is a hybrid mass spectrometer that combines the advantages of an inductively coupled plasma source and the precise measurements of a magnetic sector multicollector mass spectrometer. The primary advantage of the MC-ICPMS is its ability to analyze a broader range of elements, including those with high ionization potential that are difficult to analyze by Thermal Ionization Mass Spectrometry (TIMS). The ICP source also allows flexibility in how samples are introduced to the mass spectrometer and allows the analysis of samples introduced either as an aspirated solution or as an aerosol produced by laser ablation.
Niskin-X
Niskin-X
PI Supplied Instrument Name: Niskin-X Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Cruise: EN631
EN631
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel
EN631
Rodney J. Johnson
Bermuda Institute of Ocean Sciences
https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/endeavor_en631.pdf
Report describing EN631
Cruise: AE1909
AE1909
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1909
Rodney J. Johnson
Bermuda Institute of Ocean Sciences
https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/atlanticexplorer_ae1909.pdf
Report describing AE1909
Cruise: AE1921
AE1921
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1921
Rodney J. Johnson
Bermuda Institute of Ocean Sciences
https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/atlanticexplorer_ae1921.pdf
Report describing AE1921
Cruise: AE1930
AE1930
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1930
Rodney J. Johnson
Bermuda Institute of Ocean Sciences
https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/atlanticexplorer_ae1930.pdf
Report describing AE1930
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel