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Title Sum-
Institution Dataset ID
     data   graph     files  public SAFe and GEOTRACES trace element references from R/V Knorr KN199-04, KN204-01 in the
Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String SAFe reference samples:
During the SAFe (Sampling and Analysis of Fe) program and the North Atlantic
and North Pacific GEOTRACES Intercalibration cruises, we (Geoffrey Smith and
Ken Bruland) collected large volumes of homogenized surface and deep seawater
to provide 0.5 L SAFe reference samples to researchers investigating the
marine chemistry of trace metals in both the U.S. and international trace
metal communities. Surface seawater was collected using the UCSC designed
\"GeoFish\" towed sampling system, filtered as described below and then
homogenized in two 500 L SAFe tanks. Water from 1000 m was collected with
multiple four-bottle casts using our Teflon coated, 30 L, GOFlo samplers
deployed on Kevlar hydroline (Bruland et al. 1979), filtered and then
homogenized in one of the SAFe tanks. Our GeoFish/SAFe tank system consists of
PFA Teflon tubing, an all PFA Teflon diaphragm pump, sequential filtration
through 0.45 \u00b5m then 0.2 \u00b5m pore size polycarbonate, track etched
(PCTE) pleated filter cartridges and two 500 L fluorinated low density
polyethylene tanks connected with all Teflon tubing, valves and fittings. All
filtrations, acidifications and bottling of the SAFe samples were performed
inside of Class-100 clean benches in a portable clean van. We successfully
collected and continue to provide to an international trace metal community
650 SAFe S reference samples of surface water, 650 SAFe D1 reference samples
of 1000 meter depth water, and 650 SAFe D2 reference samples of 1000 meter
depth water. These samples have been stored in rigorously acid cleaned LDPE
bottles for over four years and have proven stable for dissolved Fe and other
trace metals. These SAFe reference samples are now proving to be valuable for
a suite of GEOTRACES key and non-key trace metals.

GEOTRACES reference samples:
A variety of GEOTRACES reference samples are also available. We used the
SAFe tank system on the North Atlantic GEOTRACES Intercalibration cruise to
collect an additional set of North Atlantic GEOTRACES reference samples from
the surface and from a depth of 2000 meters. The surface reference sample (GS)
was collected with the GeoFish sampling system in the same manner as for SAFe
S samples, while the 2000 m deep reference sample (GD) was collected with 5
separate casts of the GEOTRACES rosette to rinse and fill a tank.

During the Pacific GEOTRACES Intercalibration cruise, we used the GeoFish/SAFe
tank system to collect additional Pacific surface water from the SAFe site to
be used as GEOTRACES surface Pacific (GSP) reference samples (~300 0.5 L
bottles). Additionally, we collected a surface tank from the highly productive
surface waters of the Santa Barbara Basin coastal site on the Pacific
Intercalibration cruise and aliquoted ~600 0.5 L samples of this water as a
SAFe/GEOTRACES coastal surface reference sample, \"SGC\".
attribute NC_GLOBAL awards_0_award_nid String 55135
attribute NC_GLOBAL awards_0_award_number String OCE-0961579
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0961579 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Donald L. Rice
attribute NC_GLOBAL awards_0_program_manager_nid String 51467
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String version: 11 Jan 2012

PI: K. Bruland (UCSC)

Reference trace element concentrations from deep
and surface GEOTRACES NAZT cruises
NOTE: Co and Cu were UV-treated
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2013-01-11T16:27:08Z
attribute NC_GLOBAL date_modified String 2020-03-27T16:40:31Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.3852.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/3852 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String GO-FLO Teflon TM
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Teflon coated,30 L, GOFlo samplers were deployed on Kevlar hydroline (Bruland et al. 1979),
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 6027
attribute NC_GLOBAL instruments_0_description String 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.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/30/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String GO-FLO Teflon Trace Metal Bottle
attribute NC_GLOBAL instruments_0_instrument_nid String 533
attribute NC_GLOBAL instruments_0_supplied_name String GO-FLO Teflon Trace Metal
attribute NC_GLOBAL instruments_1_acronym String GeoFish
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 6044
attribute NC_GLOBAL instruments_1_description String The GeoFish towed sampler is a custom designed near surface (
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/31/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String GeoFish Towed near-Surface Sampler
attribute NC_GLOBAL instruments_1_instrument_nid String 549
attribute NC_GLOBAL instruments_1_supplied_name String GeoFish
attribute NC_GLOBAL instruments_2_acronym String Mass Spec
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 6026
attribute NC_GLOBAL instruments_2_description String General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB16/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Mass Spectrometer
attribute NC_GLOBAL instruments_2_instrument_nid String 685
attribute NC_GLOBAL instruments_2_supplied_name String Mass Spectrometer
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, blank, chemical, cruise, cruise_id, data, dataset, deep, dmo, element, erddap, lod, management, oceanography, office, preliminary, ref, ref_GT_deep, ref_GT_surf, ref_SAFe_deep, ref_SAFe_surf, safe, sta, surf, unit
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/3852/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/3852 (external link)
attribute NC_GLOBAL param_mapping String {'3852': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/3852/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of California-Santa Cruz
attribute NC_GLOBAL people_0_affiliation_acronym String UC Santa Cruz
attribute NC_GLOBAL people_0_person_name String Kenneth W. Bruland
attribute NC_GLOBAL people_0_person_nid String 50662
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Nancy Copley
attribute NC_GLOBAL people_1_person_nid String 50396
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String U.S. GEOTRACES NAT
attribute NC_GLOBAL projects_0_acronym String U.S. GEOTRACES NAT
attribute NC_GLOBAL projects_0_description String Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office.
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.
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.
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]
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.
The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2).
KN199-04 Cruise Report (PDF)
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]
The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3).
KN204-01A,B Cruise Report (PDF)
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]
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: Standards and Reference Materials
ADCP data are available from the Currents ADCP group at the University of Hawaii at the links below:KN199-04   (leg 1 of 2010 cruise; Lisbon to Cape Verde)KN199-05   (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)KN204-01A (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)KN204-01B (part 2 of 2011 cruise; Bermuda to Cape Verde)
attribute NC_GLOBAL projects_0_end_date String 2013-08
attribute NC_GLOBAL projects_0_geolocation String Subtropical western and eastern North Atlantic Ocean
attribute NC_GLOBAL projects_0_name String U.S. GEOTRACES North Atlantic Transect
attribute NC_GLOBAL projects_0_project_nid String 2066
attribute NC_GLOBAL projects_0_project_website String http://www.geotraces.org/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2010-10
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String SAFe and GEOTRACES trace element references from R/V Knorr cruises KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011.
attribute NC_GLOBAL title String SAFe and GEOTRACES trace element references from R/V Knorr KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable cruise_id   String  
attribute cruise_id bcodmo_name String cruise_id
attribute cruise_id description String cruise identification
attribute cruise_id long_name String Cruise Id
attribute cruise_id units String text
variable sta   byte  
attribute sta _FillValue byte 127
attribute sta actual_range byte 7, 20
attribute sta bcodmo_name String sta
attribute sta description String station number
attribute sta long_name String Sta
attribute sta units String integer
variable element   String  
attribute element bcodmo_name String unknown
attribute element description String chemical trace element measured
attribute element long_name String Element
attribute element units String text
variable unit   String  
attribute unit bcodmo_name String unknown
attribute unit description String concentration units measured for each element
attribute unit long_name String Unit
attribute unit units String picomoles/kilogram or nanomoles/kilogram
variable blank   float  
attribute blank _FillValue float NaN
attribute blank actual_range float 0.01, 1.57
attribute blank bcodmo_name String unknown
attribute blank description String concentration measured for each element in the blank
attribute blank long_name String Blank
attribute blank units String picomoles/kilogram or nanomoles/kilogram
variable lod   float  
attribute lod _FillValue float NaN
attribute lod actual_range float 0.01, 1.19
attribute lod bcodmo_name String unknown
attribute lod description String limit of detection equivalent to 3 times the standard deviation of the blanks or samples at or near blank level.
attribute lod long_name String Lod
attribute lod units String picomoles/kilogram or nanomoles/kilogram
variable ref_SAFe_deep   float  
attribute ref_SAFe_deep _FillValue float NaN
attribute ref_SAFe_deep actual_range float 0.35, 1002.11
attribute ref_SAFe_deep bcodmo_name String trace_metal_conc
attribute ref_SAFe_deep description String concentration measured for each element from water collected at 1000 meters at the SAFe site (Pacific O.)
attribute ref_SAFe_deep long_name String Ref SAFe Deep
attribute ref_SAFe_deep nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute ref_SAFe_deep units String picomoles/kilogram or nanomoles/kilogram
variable ref_SAFe_surf   float  
attribute ref_SAFe_surf _FillValue float NaN
attribute ref_SAFe_surf actual_range float 0.07, 62.19
attribute ref_SAFe_surf bcodmo_name String trace_metal_conc
attribute ref_SAFe_surf description String concentration measured for each element from water collected at the surface at the SAFe site (Pacific O.)
attribute ref_SAFe_surf long_name String Ref SAFe Surf
attribute ref_SAFe_surf nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute ref_SAFe_surf units String picomoles/kilogram or nanomoles/kilogram
variable ref_GT_deep   float  
attribute ref_GT_deep _FillValue float NaN
attribute ref_GT_deep actual_range float 0.19, 272.15
attribute ref_GT_deep bcodmo_name String trace_metal_conc
attribute ref_GT_deep description String concentration measured for each element from water collected at 2000 meters at the GEOTRACES site (Atlantic O.)
attribute ref_GT_deep long_name String Ref GT Deep
attribute ref_GT_deep nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute ref_GT_deep units String picomoles/kilogram or nanomoles/kilogram
variable ref_GT_surf   float  
attribute ref_GT_surf _FillValue float NaN
attribute ref_GT_surf actual_range float 0.04, 129.88
attribute ref_GT_surf bcodmo_name String trace_metal_conc
attribute ref_GT_surf description String concentration measured for each element from water collected at the surface GEOTRACES site (Atlantic O.)
attribute ref_GT_surf long_name String Ref GT Surf
attribute ref_GT_surf nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute ref_GT_surf units String picomoles/kilogram or nanomoles/kilogram

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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