http://lod.bco-dmo.org/id/dataset/958934
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
2025-04-12
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Total aerosol iron isotope ratios from the 2011 GA03 U.S. GEOTRACES North Atlantic Transect Cruise, KN204-01, on R/V Knorr
2025-04-14
publication
2025-04-14
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-07-29
publication
https://doi.org/10.26008/1912/bco-dmo.958934.1
Seth G. John
University of South Carolina
principalInvestigator
Timothy M. Conway
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: Conway, T. M., John, S. G. (2025) Total aerosol iron isotope ratios from the 2011 GA03 U.S. GEOTRACES North Atlantic Transect Cruise, KN204-01, on R/V Knorr. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-04-14 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.958934.1 [access date]
GT11 (GA03) Bulk Aerosol Fe isotopes - KN204-01 Dataset Description: Methods and Sampling: <p>(Sampling and Digestion methods are reproduced directly from <a href="http://bco-dmo.org/dataset/3865" target="_blank">http://bco-dmo.org/dataset/3865</a>.)</p>
<p><strong>Sample Collection:</strong><br />
Aerosol samples were collected on acid-washed Whatman 41 (W41) cellulose ester filter papers deployed in one of two high-volume aerosol samplers (model 5170-VBL, Tisch Environmental) deployed simultaneously operating at approximately 1.2 cubic meters air per minute. The aerosol samplers were deployed on the ship's flying bridge (14 meters above sea level) as high off the water as possible. Contamination from the ship's stack exhaust was avoided by controlling aerosol sampling with respect to wind sector and wind speed using an anemometer interfaced with a Campbell Scientific CR800 datalogger and PC. The samplers were allowed to run when the wind was +/- 60 degrees from the bow and &gt; 0.5 meters per second (m/s). When the wind failed to meet these two criteria, the motors were shut off automatically and not allowed to restart until the wind met both the speed and direction criteria for 5 continuous minutes. The anemometer was deployed nearby on a separate pole in 'free air' where turbulence from the wind crossing the bow did not cause the wind vane to wobble excessively. Filters for total aerosols were stored frozen prior to processing.</p>
<p><strong>Sample Digestion:</strong><br />
The W41 filter discs were digested in tightly capped Teflon vials using sequential additions of concentrated acid solutions [nitric acid (Optima) and hydrofluoric acid (Optima)] at 150 degrees C (Morton et al., 2013). Any solution remaining after each digestion step was heated to dryness. After the final digestion and dry down, the samples were re-dissolved with 0.32 M nitric acid for analysis using inductively coupled plasma mass spectrometry (ICP-MS; Agilent 7500CS and Thermo Element 2). All filter digestions were performed under a Class 100 laminar flow hood at the National High Magnetic Field Laboratory at Florida State University (FSU).</p>
<p>Blank solutions for the acid digestions were prepared by digesting W41 discs that had been deployed in the aerosol samplers for 1 hour while not in operation. For example, blanks accounted for 65.6 ± 0.52 nanograms per cubic meter (ng m-3) air Fe (representing an average of 0.09 ± 0.001% of the Fe sample concentrations).</p>
<p><strong>Iron Isotope Analysis:</strong><br />
At the University of South Carolina (USC), aliquots of total-digested aerosol filters were evaporated to dryness, spiked with an 57-58 Fe double spike, and purified by AGMP-1 Column Chemistry. Methods followed Conway et al. (2013). Following purification, iron stable isotope ratios were determined by Neptune multi-collector ICPMS. Fe was analzyed using HR mode. Each sample was analyzed twice and the mean isotope ratios are expressed here relative to international isotope standard IRMM-014. Instrumental and procedural fractionation were corrected for using a double spike reduction scheme. Samples were corrected for blank contribution based on the measured mass of Fe and measured Fe isotope signatures of blank filters (see Conway et al., 2019 for more details).</p>
<p>We express uncertainty conservatively (2 sigma) as 0.05 permil (1 sigma is 0.025) based on replicate seawater and aerosol sample measurements (see Conway et al., 2019) .</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1131387 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1131387
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1132766 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1132766
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1234417 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1234417
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0928084 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0928084
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
Timothy M. Conway
University of South Carolina
727-258-1081
College of Marine Sciences 830 1st St SE
St. Petersburg
FL
33701
USA
tmconway@usf.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station_ID
Event_ID
Start_ISO_DateTime_UTC
Start_Date_UTC
Start_Time_UTC
End_ISO_DateTime_UTC
End_Date_UTC
End_Time_UTC
Start_Latitude
Start_Longitude
End_Latitude
End_Longitude
Sample_ID
Fe_56_54_A_T_DELTA_HIVOL_btjjlt
SD1_Fe_56_54_A_T_DELTA_HIVOL_btjjlt
Flag_Fe_56_54_A_T_DELTA_HIVOL_btjjlt
aerosol samplers (model 5170-VBL, Tisch Environmental)
anemometer
Campbell Scientific CR800 datalogger
Thermo Fisher Neptune Plus
theme
None, User defined
station
event
ISO_DateTime_UTC
date
time of day
latitude
longitude
sample identification
Fe 54 to Fe 56 ratio
quality flag
featureType
BCO-DMO Standard Parameters
Aerosol Sampler
Anemometer
Campbell Scientific CR800 data logger
Multi Collector Inductively Coupled Plasma Mass Spectrometer
instrument
BCO-DMO Standard Instruments
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="http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/GEOTRACES_Atl_stas.jpg" 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="http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/GNAT_stationPlan.jpg" 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="http://bcodata.whoi.edu/US_GEOTRACES/AtlanticSection/KN204-01_Stations.png" 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
-69.8
-24.53
17.4
39.7
2011-11-08
2011-12-09
Subtropical western and eastern North Atlantic Ocean (GA03)
0
BCO-DMO catalogue of parameters from Total aerosol iron isotope ratios from the 2011 GA03 U.S. GEOTRACES North Atlantic Transect Cruise, KN204-01, on R/V Knorr
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/959013.rdf
Name: Station_ID
Units: unitless
Description: <p>Station number; added by BCO-DMO using the cruise event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/959014.rdf
Name: Event_ID
Units: unitless
Description: <p>Event number; added by BCO-DMO using the cruise event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/959015.rdf
Name: Start_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at start of sample collection in ISO 8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/959016.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>Date at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959017.rdf
Name: Start_Time_UTC
Units: unitless
Description: <p>Time (UTC) at start of sample collection; added by BCO-DMO using the cruise event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/959018.rdf
Name: End_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at end of sample collection in ISO 8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/959019.rdf
Name: End_Date_UTC
Units: unitless
Description: <p>Date at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959020.rdf
Name: End_Time_UTC
Units: unitless
Description: <p>Time (UTC) at end of sample collection; added by BCO-DMO using the cruise event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/959021.rdf
Name: Start_Latitude
Units: decimal degrees
Description: <p>Latitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959022.rdf
Name: Start_Longitude
Units: decimal degrees
Description: <p>Longitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959023.rdf
Name: End_Latitude
Units: decimal degrees
Description: <p>Latitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959024.rdf
Name: End_Longitude
Units: decimal degrees
Description: <p>Longitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959025.rdf
Name: Sample_ID
Units: unitless
Description: <p>GEOTRACES sample ID number. "a", "b", or "c" following the sample number refers to the filter ID for deployments that had multiple filters collected.</p>
http://lod.bco-dmo.org/id/dataset-parameter/959026.rdf
Name: Fe_56_54_A_T_DELTA_HIVOL_btjjlt
Units: per 10^3
Description: <p>Atom ratio of total Fe isotopes in aerosols (no preliminary leaching) expressed in conventional DELTA notation referenced to {IRMM-14}</p>
http://lod.bco-dmo.org/id/dataset-parameter/959027.rdf
Name: SD1_Fe_56_54_A_T_DELTA_HIVOL_btjjlt
Units: per 10^3
Description: <p>One standard deviation of Fe_56_54_A_T_DELTA_HIVOL_btjjlt</p>
http://lod.bco-dmo.org/id/dataset-parameter/959028.rdf
Name: Flag_Fe_56_54_A_T_DELTA_HIVOL_btjjlt
Units: unitless
Description: <p>Quality flag for Fe_56_54_A_T_DELTA_HIVOL_btjjlt</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
1653
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/cca444da-a8f3-4b19-baa1-dbd640a951d2/content
download
https://doi.org/10.26008/1912/bco-dmo.958934.1
download
onLine
dataset
<p>(Sampling and Digestion methods are reproduced directly from <a href="http://bco-dmo.org/dataset/3865" target="_blank">http://bco-dmo.org/dataset/3865</a>.)</p>
<p><strong>Sample Collection:</strong><br />
Aerosol samples were collected on acid-washed Whatman 41 (W41) cellulose ester filter papers deployed in one of two high-volume aerosol samplers (model 5170-VBL, Tisch Environmental) deployed simultaneously operating at approximately 1.2 cubic meters air per minute. The aerosol samplers were deployed on the ship's flying bridge (14 meters above sea level) as high off the water as possible. Contamination from the ship's stack exhaust was avoided by controlling aerosol sampling with respect to wind sector and wind speed using an anemometer interfaced with a Campbell Scientific CR800 datalogger and PC. The samplers were allowed to run when the wind was +/- 60 degrees from the bow and &gt; 0.5 meters per second (m/s). When the wind failed to meet these two criteria, the motors were shut off automatically and not allowed to restart until the wind met both the speed and direction criteria for 5 continuous minutes. The anemometer was deployed nearby on a separate pole in 'free air' where turbulence from the wind crossing the bow did not cause the wind vane to wobble excessively. Filters for total aerosols were stored frozen prior to processing.</p>
<p><strong>Sample Digestion:</strong><br />
The W41 filter discs were digested in tightly capped Teflon vials using sequential additions of concentrated acid solutions [nitric acid (Optima) and hydrofluoric acid (Optima)] at 150 degrees C (Morton et al., 2013). Any solution remaining after each digestion step was heated to dryness. After the final digestion and dry down, the samples were re-dissolved with 0.32 M nitric acid for analysis using inductively coupled plasma mass spectrometry (ICP-MS; Agilent 7500CS and Thermo Element 2). All filter digestions were performed under a Class 100 laminar flow hood at the National High Magnetic Field Laboratory at Florida State University (FSU).</p>
<p>Blank solutions for the acid digestions were prepared by digesting W41 discs that had been deployed in the aerosol samplers for 1 hour while not in operation. For example, blanks accounted for 65.6 ± 0.52 nanograms per cubic meter (ng m-3) air Fe (representing an average of 0.09 ± 0.001% of the Fe sample concentrations).</p>
<p><strong>Iron Isotope Analysis:</strong><br />
At the University of South Carolina (USC), aliquots of total-digested aerosol filters were evaporated to dryness, spiked with an 57-58 Fe double spike, and purified by AGMP-1 Column Chemistry. Methods followed Conway et al. (2013). Following purification, iron stable isotope ratios were determined by Neptune multi-collector ICPMS. Fe was analzyed using HR mode. Each sample was analyzed twice and the mean isotope ratios are expressed here relative to international isotope standard IRMM-014. Instrumental and procedural fractionation were corrected for using a double spike reduction scheme. Samples were corrected for blank contribution based on the measured mass of Fe and measured Fe isotope signatures of blank filters (see Conway et al., 2019 for more details).</p>
<p>We express uncertainty conservatively (2 sigma) as 0.05 permil (1 sigma is 0.025) based on replicate seawater and aerosol sample measurements (see Conway et al., 2019) .</p>
Specified by the Principal Investigator(s)
<p>Data were processed in Excel. Data follow the recommended GEOTRACES (SeaDataNet) quality flag scheme. For more information on SeaDataNet flags, see: <a href="https://www.geotraces.org/geotraces-quality-flag-policy/" target="_blank">https://www.geotraces.org/geotraces-quality-flag-policy/</a> and <a href="https://www.seadatanet.org/Standards/Data-Quality-Control" target="_blank">https://www.seadatanet.org/Standards/Data-Quality-Control</a>.</p>
<p>SeaDataNet quality flag definitions:<br />
0 = No quality control;<br />
1 = Good value;<br />
2 = Probably good value;<br />
3 = Probably bad value;<br />
4 = Bad value;<br />
5 = Changed value;<br />
6 = Value below detection;<br />
7 = Value in excess;<br />
8 = Interpolated value;<br />
9 = Missing value;<br />
A = Value phenomenon uncertain.</p>
Specified by the Principal Investigator(s)
- Imported original file "KN204_dataTemplate.xlsx" into the BCO-DMO system.
- Joined the cruise event log to the data file based on Sample Id.
- Populated the following columns with data from the event log: Station_ID, Event_ID, Start_Time, End_Time.
- Removed empty columns: Gear ID, Rosette Position, and Sample Depth.
- Renamed fields to comply with BCO-DMO naming conventions.
- Changed format of the date columns from %d-%m-%y to %m-%d-%y to match the KN199-04 data.
- Created Date-Time UTC fields in ISO 8601 format.
- Made longitude values negative (to indicate West direction).
- Corrected the end longitude for samples 6677b and 6667c.
- Saved final file as "958934_v1_bulk_areosol_fe_isotopes_kn204-01.csv".
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
aerosol samplers (model 5170-VBL, Tisch Environmental)
aerosol samplers (model 5170-VBL, Tisch Environmental)
PI Supplied Instrument Name: aerosol samplers (model 5170-VBL, Tisch Environmental) PI Supplied Instrument Description:Two high-volume Tisch Environmental (model 5170-VBL) aerosol samplers were used. Instrument Name: Aerosol Sampler Instrument Short Name: Instrument Description: A device that collects a sample of aerosol (dry particles or liquid droplets) from the atmosphere. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/13/
anemometer
anemometer
PI Supplied Instrument Name: anemometer Instrument Name: Anemometer Instrument Short Name:Anemometer Instrument Description: An anemometer is a device for measuring the velocity or the pressure of the wind. It is commonly used to measure wind speed. Aboard research vessels, it is often mounted with other meteorological instruments and sensors. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/101/
Campbell Scientific CR800 datalogger
Campbell Scientific CR800 datalogger
PI Supplied Instrument Name: Campbell Scientific CR800 datalogger Instrument Name: Campbell Scientific CR800 data logger Instrument Short Name:Campbell CR800 Instrument Description: A stand-alone datalogger. It is designed for use in harsh and remote environments. It operates using 12 VDC power sources such as batteries recharged with solar panels or wall sockets. It contains a custom ASIC chip and supports PakBus, Modbus, DNP3, SDI-12, SDM communication protocols. It has a real-time clock accuracy of +/-3 min per year.
Thermo Fisher Neptune Plus
Thermo Fisher Neptune Plus
PI Supplied Instrument Name: Thermo Fisher Neptune Plus PI Supplied Instrument Description:A Thermo Fisher Neptune Plus was used to measure iron isotope ratios. 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.
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