http://lod.bco-dmo.org/id/dataset/4074
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
2013-11-06
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Particulate Fe isotopes (d56Fe, labile d56Fe, labile[Fe], [Cd], [Ba], and [P]) from R/V Knorr cruises KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
2013-11-08
publication
2013-11-08
revision
BCO-DMO Linked Data URI
2013-11-08
creation
http://lod.bco-dmo.org/id/dataset/4074
Seth G. John
University of South Carolina
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: John, S. G. (2013) Particulate Fe isotopes (d56Fe, labile d56Fe, labile[Fe], [Cd], [Ba], and [P]) from R/V Knorr cruises KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 08 Nov 2013) Version Date 2013-11-08 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/4074 [access date]
Particulate Fe isotopes (d56Fe, labile d56Fe, labile[Fe], [Cd], [Ba], and [P]) from GT10 and GT11 cruises. Dataset Description: <p>Particulate iron (Fe) isotope data, including suspended particulate total δ56Fe, labile δ56Fe, labile [Fe], [Cd], [Ba], and [P], from the 2010 and 2011 U.S. GEOTRACES North Atlantic Transect cruises (GT10 and GT11).</p> Methods and Sampling: <p>Note: Methodology for this dataset is the same as that used in the <a href="https://www.bco-dmo.org/dataset/669178" target="_blank">GEOTRACES EPZT particles data</a> from Seth John.</p>
<p>A subsample (0.8 - 51 um-sized) of a total digestion of the suspended particles was provided by P. Lam for the analysis of total particle δ56Fe. Samples were purified by anion exchange chromatography and analyzed by multi-collector ICPMS.</p>
<p>The "labile" phase of the suspended particles was determined by leaching with a pH 8 solution containing 0.1 M oxalic acid and 0.05 M EDTA for 2 hours at 90 degrees C. Method is described in Revels et al (2015). Labile δ56Fe was determined according to the same procedures as total δ56Fe. Concentrations of Fe, Cd, Ba, and P in the labile phase were determined by analysis of the leachate on an Element single-collector ICP-MS.</p>
<p><strong>References:</strong><br />
B.N. Revels, D.C. Ohnemus, P.J. Lam, T.M. Conway, S.G. John (2015) The isotopic signature and distribution of particulate iron in the North Atlantic Ocean. Deep-Sea Research II 116, 321-331. doi:10.1016/j.dsr2.2014.12.004</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1131387 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1131387
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0929491 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0929491
completed
Seth G. John
University of South Carolina
213-740-0696
USC ZHS 117 2651 Trousdale Pkwy.
Los Angeles
CA
90089
USA
sethjohn@usc.edu
pointOfContact
asNeeded
Dataset Version: 08 Nov 2013
Unknown
cruise_id
cruise_name
station_GEOTRC
lat
lon
lon_360
depth
event_GEOTRC
cast_GEOTRC
sample_GEOTRC
tot_d56Fe_susp
tot_d56Fe_susp_err2s
tot_d56Fe_susp_flag
labile_d56Fe_susp
labile_d56Fe_susp_err2s
labile_d56Fe_susp_flag
labile_Fe_susp
labile_Fe_susp_err1s
labile_Fe_susp_flag
labile_Cd_susp
labile_Cd_susp_err1s
labile_Cd_susp_flag
labile_Ba_susp
labile_Ba_susp_err1s
labile_Ba_susp_flag
labile_P_susp
labile_P_susp_err1s
labile_P_susp_flag
sample_bottle_GEOTRC
bottle_GEOTRC
depth_GEOTRC_CTD
BTL_ISO_DateTime_UTC
Inductively Coupled Plasma Mass Spectrometer
theme
None, User defined
cruise id
cruise name
station
latitude
longitude
longitude from 0 to 360 degrees
depth
event
cast
sample identification
Fe 54 to Fe 56 ratio
Fe_err
quality flag
Iron
No BCO-DMO term
Cadmium error
Barium
standard error
Phosphorus
Niskin bottle number
bottle
ISO_DateTime_UTC
featureType
BCO-DMO Standard Parameters
Inductively Coupled Plasma Mass Spectrometer
instrument
BCO-DMO Standard Instruments
KN199-04
KN204-01
service
Deployment Activity
Subtropical northern Atlantic Ocean
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
U.S. GEOTRACES North Atlantic Transect (GA03)
https://www.geotraces.org/
U.S. GEOTRACES North Atlantic Transect (GA03)
<p><em>Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office.</em></p>
<p>The first U.S. GEOTRACES Atlantic Section will be specifically centered around a sampling cruise to be carried out in the North Atlantic in 2010. Ed Boyle (MIT) and Bill Jenkins (WHOI) organized a three-day planning workshop that was held September 22-24, 2008 at the Woods Hole Oceanographic Institution. The main goal of the workshop, sponsored by the National Science Foundation and the U.S. GEOTRACES Scientific Steering Committee, was to design the implementation plan for the first U.S. GEOTRACES Atlantic Section. The primary cruise design motivation was to improve knowledge of the sources, sinks and internal cycling of Trace Elements and their Isotopes (TEIs) by studying their distributions along a section in the North Atlantic (Figure 1). The North Atlantic has the full suite of processes that affect TEIs, including strong meridional advection, boundary scavenging and source effects, aeolian deposition, and the salty Mediterranean Outflow. The North Atlantic is particularly important as it lies at the "origin" of the global Meridional Overturning Circulation.</p>
<p>It is well understood that many trace metals play important roles in biogeochemical processes and the carbon cycle, yet very little is known about their large-scale distributions and the regional scale processes that affect them. Recent advances in sampling and analytical techniques, along with advances in our understanding of their roles in enzymatic and catalytic processes in the open ocean provide a natural opportunity to make substantial advances in our understanding of these important elements. Moreover, we are motivated by the prospect of global change and the need to understand the present and future workings of the ocean's biogeochemistry. The GEOTRACES strategy is to measure a broad suite of TEIs to constrain the critical biogeochemical processes that influence their distributions. In addition to these "exotic" substances, more traditional properties, including macronutrients (at micromolar and nanomolar levels), CTD, bio-optical parameters, and carbon system characteristics will be measured. The cruise starts at Line W, a repeat hydrographic section southeast of Cape Cod, extends to Bermuda and subsequently through the North Atlantic oligotrophic subtropical gyre, then transects into the African coast in the northern limb of the coastal upwelling region. From there, the cruise goes northward into the Mediterranean outflow. The station locations shown on the map are for the "fulldepth TEI" stations, and constitute approximately half of the stations to be ultimately occupied.</p>
<p><em>Figure 1. The proposed 2010 Atlantic GEOTRACES cruise track plotted on dissolved oxygen at 400 m depth. Data from the World Ocean Atlas (Levitus et al., 2005) were plotted using Ocean Data View (courtesy Reiner Schlitzer). [click on the image to view a larger version]</em><br /><a href="/objectserver/86c47ca3173d90ef5edcec249de05aa6/GEOTRACES_Atl_stas.jpg?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FGEOTRACES_Atl_stas.jpg&f=3163653666383833383364633438646666303638356339386633613165393232687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f47454f5452414345535f41746c5f737461732e6a7067" target="_blank"><img alt="" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/GEOTRACES_Atl_stas.jpg" style="width:350px" /></a></p>
<p>Hydrography, CTD and nutrient measurements will be supported by the Ocean Data Facility (J. Swift) at Scripps Institution of Oceanography and funded through NSF Facilities. They will be providing an additional CTD rosette system along with nephelometer and LADCP. A trace metal clean Go-Flo Rosette and winch will be provided by the group at Old Dominion University (G. Cutter) along with a towed underway pumping system.</p>
<p>The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2).</p>
<p><a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf" target="_blank">KN199-04 Cruise Report (PDF)</a></p>
<p><em>Figure 2. The red line shows the cruise track for the first leg of the US Geotraces North Atlantic Transect on the R/V Knorr in October 2010. The rest of the stations (beginning with 13) will be completed in October-December 2011 on the R/V Knorr (courtesy of Bill Jenkins, Chief Scientist, GNAT first leg). [click on the image to view a larger version]</em><br /><a href="/objectserver/28028490f13f23fe63a08ff289a7cc8a/GNAT_stationPlan.jpg?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FGNAT_stationPlan.jpg&f=3837393231613337386638616637626663373565643337316231306231363634687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f474e41545f73746174696f6e506c616e2e6a7067" target="_blank"><img alt="Atlantic Transect Station location map" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/GNAT_stationPlan_sm.jpg" style="width:350px" /></a></p>
<p>The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3).</p>
<p><a href="http://bcodata.whoi.edu//US_GEOTRACES/AtlanticSection/Submitted_Preliminary_Cruise_Report_for_Knorr_204-01.pdf" target="_blank">KN204-01A,B Cruise Report (PDF)</a></p>
<p><em>Figure 3. Station locations occupied on the US Geotraces North Atlantic Transect on the R/V Knorr in November 2011. [click on the image to view a larger version]</em><br /><a href="/objectserver/008fd0c21f8a23724741e9c150458427/KN204-01_Stations.png?url=http%3A%2F%2Fbcodata.whoi.edu%2FUS_GEOTRACES%2FAtlanticSection%2FKN204-01_Stations.png&f=6633373930333834633833323933666666326139613061306266336237306638687474703a2f2f62636f646174612e77686f692e6564752f55535f47454f5452414345532f41746c616e74696353656374696f6e2f4b4e3230342d30315f53746174696f6e732e706e67" target="_blank"><img alt="Atlantic Transect/Part 2 Station location map" src="https://datadocs.bco-dmo.org/d2/US_GEOTRACES/AtlanticSection/KN204-01_Stations.png" style="width:350px" /></a></p>
<p>Data from the North Atlantic Transect cruises are available under the Datasets heading below, and consensus values for the SAFe and North Atlantic GEOTRACES Reference Seawater Samples are available from the GEOTRACES Program Office: <a href="http://www.geotraces.org/science/intercalibration/322-standards-and-reference-materials?acm=455_215" target="_blank">Standards and Reference Materials</a></p>
<p><strong>ADCP data</strong> are available from the Currents ADCP group at the University of Hawaii at the links below:<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2010.html#kn199_4" target="_blank">KN199-04</a> (leg 1 of 2010 cruise; Lisbon to Cape Verde)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2010.html#kn199_5" target="_blank">KN199-05</a> (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2011.html#kn204_01" target="_blank">KN204-01A</a> (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)<br /><a href="http://currents.soest.hawaii.edu/uhdas_adcp/year2011.html#kn204_02" target="_blank">KN204-01B</a> (part 2 of 2011 cruise; Bermuda to Cape Verde)</p>
U.S. GEOTRACES NAT
largerWorkCitation
project
eng; USA
oceans
Subtropical northern Atlantic Ocean
2013-11-08
Subtropical western and eastern North Atlantic Ocean (GA03)
0
BCO-DMO catalogue of parameters from Particulate Fe isotopes (d56Fe, labile d56Fe, labile[Fe], [Cd], [Ba], and [P]) from R/V Knorr cruises KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT 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
http://lod.bco-dmo.org/id/dataset-parameter/37239.rdf
Name: cruise_id
Units: text
Description: Official cruise identifier e.g. KN199-04 = R/V Knorr cruise number 199-04.
http://lod.bco-dmo.org/id/dataset-parameter/37240.rdf
Name: cruise_name
Units: text
Description: Name chosen by project investigators for the research expedition as opposed to the formal/official cruise ID asserted by the vessel operator.
http://lod.bco-dmo.org/id/dataset-parameter/37241.rdf
Name: station_GEOTRC
Units: dimensionless
Description: 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. Some GeoFish stations are denoted as X_to_Y indicating the tow occurred between stations X and Y. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
http://lod.bco-dmo.org/id/dataset-parameter/37242.rdf
Name: lat
Units: decimal degrees (-90 to 90)
Description: Latitude of the sampling station; north is positive.
http://lod.bco-dmo.org/id/dataset-parameter/37243.rdf
Name: lon
Units: decimal degrees (-180 to 180)
Description: Longitude of the sampling station; east is positive.
http://lod.bco-dmo.org/id/dataset-parameter/37244.rdf
Name: lon_360
Units: decimal degrees (0 to 360)
Description: Longitude of the sampling station from 0 to 360 degrees.
http://lod.bco-dmo.org/id/dataset-parameter/37245.rdf
Name: depth
Units: meters
Description: Sample depth, in meters.
http://lod.bco-dmo.org/id/dataset-parameter/37246.rdf
Name: event_GEOTRC
Units: dimensionless
Description: 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).
http://lod.bco-dmo.org/id/dataset-parameter/37247.rdf
Name: cast_GEOTRC
Units: dimensionless
Description: Cast identifier numbered consecutively within a station. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
http://lod.bco-dmo.org/id/dataset-parameter/37248.rdf
Name: sample_GEOTRC
Units: dimensionless
Description: Unique identifying number for US GEOTRACES samples; ranges from 5033 to 6078 for KN199-04 and from 6112 to 8148 for KN204-01. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Sample_num', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
http://lod.bco-dmo.org/id/dataset-parameter/37249.rdf
Name: tot_d56Fe_susp
Units: permil (0/00)
Description: Fe stable isotope ratio = ((54Fe/56Fe)sample/(54Fe/56Fe)IRMM-014-1)*1000 for the total suspended particles.
http://lod.bco-dmo.org/id/dataset-parameter/37250.rdf
Name: tot_d56Fe_susp_err2s
Units: permil (0/00)
Description: 2 sigma uncertainty of tot_d56Fe_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37251.rdf
Name: tot_d56Fe_susp_flag
Units: dimensionless
Description: Data quality flag for tot_d56Fe_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37252.rdf
Name: labile_d56Fe_susp
Units: permil (0/00)
Description: Fe stable isotope ratio = ((54Fe/56Fe)sample/(54Fe/56Fe)IRMM-014-1)*1000 for the labile phase of suspended particles.
http://lod.bco-dmo.org/id/dataset-parameter/37253.rdf
Name: labile_d56Fe_susp_err2s
Units: permil (0/00)
Description: 2 sigma uncertainty of labile_d56Fe_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37254.rdf
Name: labile_d56Fe_susp_flag
Units: dimensionless
Description: Data quality flag for tot_d56Fe_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37255.rdf
Name: labile_Fe_susp
Units: nanomoles per Liter (nmol L-1 or nM)
Description: Fe concentration.
http://lod.bco-dmo.org/id/dataset-parameter/37256.rdf
Name: labile_Fe_susp_err1s
Units: nanomoles per Liter (nmol L-1 or nM)
Description: 1 sigma uncertainty of labile_Fe_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37257.rdf
Name: labile_Fe_susp_flag
Units: dimensionless
Description: Data quality flag for labile_Fe_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37258.rdf
Name: labile_Cd_susp
Units: nanomoles per Liter (nmol L-1 or nM)
Description: Cd concentration.
http://lod.bco-dmo.org/id/dataset-parameter/37259.rdf
Name: labile_Cd_susp_err1s
Units: nanomoles per Liter (nmol L-1 or nM)
Description: 1 sigma uncertainty of labile_Cd_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37260.rdf
Name: labile_Cd_susp_flag
Units: dimensionless
Description: Data quality flag for labile_Cd_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37261.rdf
Name: labile_Ba_susp
Units: nanomoles per Liter (nmol L-1 or nM)
Description: Ba concentration.
http://lod.bco-dmo.org/id/dataset-parameter/37262.rdf
Name: labile_Ba_susp_err1s
Units: nanomoles per Liter (nmol L-1 or nM)
Description: 1 sigma uncertainty of labile_Ba_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37263.rdf
Name: labile_Ba_susp_flag
Units: dimensionless
Description: Data quality flag for labile_Ba_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37264.rdf
Name: labile_P_susp
Units: nanomoles per Liter (nmol L-1 or nM)
Description: P concentration.
http://lod.bco-dmo.org/id/dataset-parameter/37265.rdf
Name: labile_P_susp_err1s
Units: nanomoles per Liter (nmol L-1 or nM)
Description: 1 sigma uncertainty of labile_P_susp.
http://lod.bco-dmo.org/id/dataset-parameter/37266.rdf
Name: labile_P_susp_flag
Units: dimensionless
Description: Data quality flag for labile_Ba_susp.
1 = good data;
0 = no data.
http://lod.bco-dmo.org/id/dataset-parameter/37267.rdf
Name: sample_bottle_GEOTRC
Units: dimensionless
Description: 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).
http://lod.bco-dmo.org/id/dataset-parameter/37268.rdf
Name: bottle_GEOTRC
Units: dimensionless
Description: 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).
http://lod.bco-dmo.org/id/dataset-parameter/37269.rdf
Name: depth_GEOTRC_CTD
Units: meters
Description: Observation/sample depth in meters; calculated from CTD pressure. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
http://lod.bco-dmo.org/id/dataset-parameter/37270.rdf
Name: BTL_ISO_DateTime_UTC
Units: YYYY-MM-DDTHH:MM:SS[.xx][+/-TZ]
Description: 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)
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
28817
https://datadocs.bco-dmo.org/file/jAABwoWCG7qz89/partic_Fe_isotopes_joined.csv
partic_Fe_isotopes_joined.csv
Primary data file for dataset ID 4074
download
https://www.bco-dmo.org/dataset/4074/data/download
download
onLine
dataset
<p>Note: Methodology for this dataset is the same as that used in the <a href="https://www.bco-dmo.org/dataset/669178" target="_blank">GEOTRACES EPZT particles data</a> from Seth John.</p>
<p>A subsample (0.8 - 51 um-sized) of a total digestion of the suspended particles was provided by P. Lam for the analysis of total particle δ56Fe. Samples were purified by anion exchange chromatography and analyzed by multi-collector ICPMS.</p>
<p>The "labile" phase of the suspended particles was determined by leaching with a pH 8 solution containing 0.1 M oxalic acid and 0.05 M EDTA for 2 hours at 90 degrees C. Method is described in Revels et al (2015). Labile δ56Fe was determined according to the same procedures as total δ56Fe. Concentrations of Fe, Cd, Ba, and P in the labile phase were determined by analysis of the leachate on an Element single-collector ICP-MS.</p>
<p><strong>References:</strong><br />
B.N. Revels, D.C. Ohnemus, P.J. Lam, T.M. Conway, S.G. John (2015) The isotopic signature and distribution of particulate iron in the North Atlantic Ocean. Deep-Sea Research II 116, 321-331. doi:10.1016/j.dsr2.2014.12.004</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
All concentration data has been corrected for "dipped filter"&nbsp;blanks – filters that were deployed on each cast but did not have any seawater pumped through them. For each element, concentrations from all dipped filter blanks were averaged. The median dipped filter blank has been subtracted from this data. The given uncertainties in concentration data were calculated by propagating uncertainties from instrument precision and the standard deviation of dipped filter blanks. Detection limits are defined as three times the standard deviation of the dipped filter blanks. Concentrations below detection limit are identified as "BDL".</p>
<p>Iron isotope measurements have been corrected for the leach reagent blank and uncertainties were calculated by an isotope mass balance equation involving the instrument precision and the mean and standard deviation of the reagent blank (equation 2 in Revels et al (2015)).</p>
<p><strong>Data Quality Flags:</strong><br />
1 = good data;<br />
0 = no data.</p>
<p><strong>BCO-DMO Processing Notes:</strong><br />
Separated original "Station" column into cruise_id, cruise_name, and station_GEOTRC; added lon column from the original lon_360 column; replaced missing data with "nd" to indicate "no data"; modified parameter names to conform with BCO-DMO naming conventions.</p>
<p><strong>Additional GEOTRACES Processing:</strong><br />
After the data were submitted to the International Data Management Office, BODC, the office noticed that important identifying information was missing in many datasets. With the agreement of BODC and the US GEOTRACES lead PIs, BCO-DMO added standard US GEOTRACES information, such as the US GEOTRACES event number, to each submitted dataset lacking this information. To accomplish this, BCO-DMO compiled a 'master' dataset composed of the following parameters: station_GEOTRC, cast_GEOTRC (bottle and pump data only), event_GEOTRC, sample_GEOTRC, sample_bottle_GEOTRC (bottle data only), bottle_GEOTRC (bottle data only), depth_GEOTRC_CTD (bottle data only), depth_GEOTRC_CTD_rounded (bottle data only), BTL_ISO_DateTime_UTC (bottle data only), and GeoFish_id (GeoFish data only). This added information will facilitate subsequent analysis and inter comparison of the datasets.<br />
<br />
Bottle parameters in the master file were taken from the GT-C_Bottle_GT10, GT-C_Bottle_GT11, ODF_Bottle_GT10, and ODF_Bottle_GT11 datasets. Non-bottle parameters, including those from GeoFish tows, Aerosol sampling, and McLane Pumps, were taken from the Event_Log_GT10 and Event_Log_GT11 datasets. McLane pump cast numbers missing in event logs were taken from the Particulate Th-234 dataset submitted by Ken Buesseler.<br />
<br />
A standardized BCO-DMO method (called "join") was then used to merge the missing parameters to each US GEOTRACES dataset, most often by matching on sample_GEOTRC or on some unique combination of other parameters.<br />
<br />
If the master parameters were included in the original data file and the values did not differ from the master file, the original data columns were retained and the names of the parameters were changed from the PI-submitted names to the standardized master names. If there were differences between the PI-supplied parameter values and those in the master file, both columns were retained. If the original data submission included all of the master parameters, no additional columns were added, but parameter names were modified to match the naming conventions of the master file.<br />
<br />
See the dataset parameters documentation for a description of which parameters were supplied by the PI and which were added via the join method.</p>
Specified by the Principal Investigator(s)
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
Inductively Coupled Plasma Mass Spectrometer
Inductively Coupled Plasma Mass Spectrometer
PI Supplied Instrument Name: Inductively Coupled Plasma Mass Spectrometer PI Supplied Instrument Description:Samples were analyzed by multi-collector ICP-MS or on an Element single-collector ICP-MS (see Acquisition Description). Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
Cruise: KN199-04
KN199-04
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel
KN199-04
William J. Jenkins
Woods Hole Oceanographic Institution
http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/Cruise_Report_for_Knorr_199_Final_v3.pdf
Report describing KN199-04
Cruise: KN204-01
KN204-01
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel
KN204-01
Edward A. Boyle
Massachusetts Institute of Technology
http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/STS_Prelim_GT11_Doc.pdf
Report describing KN204-01
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel