http://lod.bco-dmo.org/id/dataset/928246
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
2024-05-22
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Geochemical composition of sediment pore water samples collected in the Equatorial Pacific during October and November 2020 on R/V Kilo Moana cruise KM2012
2024-05-23
publication
2024-05-23
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2024-05-24
publication
https://doi.org/10.26008/1912/bco-dmo.928246.1
Brian Haley
Oregon State University
principalInvestigator
James McManus
Bigelow Laboratory for Ocean Sciences
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: Haley, B., McManus, J. (2024) Geochemical composition of sediment pore water samples collected in the Equatorial Pacific during October and November 2020 on R/V Kilo Moana cruise KM2012. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-05-23 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.928246.1 [access date]
Sediment pore water geochemical compositional data Dataset Description: Methods and Sampling: <p>Water column, sediment, and pore water samples were collected following the methods in Abbott et al. (2015) during R/V Kilo Moana cruise KM2012 in October and November 2020. Pore water aliquots for REE (Rare Earth Elemental) concentration and εNd were collected by centrifuge and filtration (&lt;0.45 micrometers (μm)). The REE aliquots were extracted from one core, while the εNd aliquots were multiple, combined extractions from corresponding layers of 20 to 25 cores. See 'Related Datasets' for the data from the water column samples and sediment cores.</p>
<p>Pore water aliquots for nutrient analyses were extracted using Rhizon samplers and filtered (&lt;0.2 µm). Pore water aliquots for DOC analysis were extracted via Rhizon, filtered (&lt;0.45 μm with GFF filter), poisoned with mercuric chloride, and stored in a glass vial.</p>
<p>Pore water dissolved O2 concentration was measured using a fiber-optic oxygen microsensor inserted into pre-drilled holes through the core into the sediments. The sensor readings are converted to oxygen concentration by linearly calibrating against the published bottom water O2 concentration at the study sites.</p>
<p>Pore water pH was measured on unfiltered samples using a portable pH sensor post-extraction via centrifugation. Analyses of pH in pore waters is notoriously difficult due to the changes in pressure upon recovery, and thus the pH data have finite utility.</p>
<p>Elemental concentrations, including the REEs, were analyzed at Oregon State University (OSU) using an Elemental Scientific seaFAST-pico offline preconcentration technique, and the procedure has been extensively documented as part of the GEOTRACES intercalibration effort (Behrens et al., 2016). Elemental concentrations of the εNd aliquots (~10 milliliters (mL)) were analyzed at ETH Zurich using Nobias Chelate-PA1 resin in a manual column procedure (K. Deng et al., 2022).</p>
<p>Isotope analysis of the εNd aliquots (400~700 mL of pore water or ~1.5 liters (L) of seawater) were done at ETH Zurich. Samples were buffered to a pH of 5.5 ± 5 and pre-concentrated using an in-house extraction manifold containing Nobias Chelate-PA1 resin. After pre-concentration, separation of Nd from the matrix elements and other REE was done using Eichrom RE and LN spec resins. Procedural blanks are &lt;3 picograms (pg). Isotope analysis was done on an Neptune Plus MC-ICP-MS (Thermo-Fisher) following the procedure of Vance and Thirlwall (2002). Internally normalized sample data was renormalized to the 143Nd/144Nd ratio of La Jolla (Thirlwall, 1991). Repeated analysis of 8 parts per billion (ppb) La Jolla solutions results in a long-term external reproducibility of 0.27 ε (2σ). Nd isotope analysis was also quality-controlled by repeated measurements of the USGS reference materials BCR-2 (εNd = -0.11 ± 0.25, 2σ) and BHVO-2 (εNd = 6.70 ± 0.24, 2σ) at the same concentration (5-10 ppb) as the pore water samples in agreement with literature results (Jochum et al., 2005).</p>
<p>Nutrients were analyzed at Oregon State University using Technicon AutoAnalyzer II (phosphate and ammonium) and Alpkem RFA 300 (silicic acid, nitrate+nitrite). The method and data processing follow Gordon et al. (1993). DOC was analyzed with a V-CSN/TNM-1 (Shimadzu Corp, Kyoto, Japan) at the Scripps Institution of Oceanography following White et al. (2023).</p>
<p>Sediment samples were analysed for total organic carbon contents using a GVI (now Elementar) Isoprime 1000 with Eurovector EA at Bigelow Laboratory for Ocean Sciences. Samples were measured for the total carbon (organic plus inorganic) and a separate sample split was acidified to remove carbonate and then measured for the organic fraction.</p>
<p>X-ray diffraction (XRD) of freeze-dried raw samples were made at K/T GeoServices Inc. (Colorado, USA), using a Siemens D500 automated powder diffractometer equipped with a copper X-ray source (40kV, 30mA) and a scintillation X-ray detector. Semi-quantitative determinations of whole-sediment mineral amounts were done using Jade Software (Materials Data, Inc.) with the Whole Pattern Fitting option.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1850765 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1850765
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1850789 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1850789
completed
Brian Haley
Oregon State University
541-737-2649
Oregon State University 104 COAS Admin. Bldg.,
Corvallis
OR
97331-5503
USA
brian.haley@oregonstate.edu
pointOfContact
James McManus
Bigelow Laboratory for Ocean Sciences
207-315-2567, ext. 307
60 Bigelow Drive
East Boothbay
ME
04544
USA
mcmanusjim@icloud.com
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station_Number
Latitude
Longitude
Date
bottom_depth
nominal_depth
La_pM
Ce_pM
Pr_pM
Nd_pM
Sm_pM
Eu_pM
Gd_pM
Tb_pM
Dy_pM
Ho_pM
Er_pM
Tm_pM
Yb_pM
Lu_pM
Co_nM
Ni_nM
Cu_nM
Zn66_nM
Zn68_nM
Mo_nM
Cd_nM
Pb_nM
U_nM
Ca_mmol_L
Ca_error
K_mmol_L
K_error
Mg_mmol_L
Mg_error
Na_mmol_L
Na_error
S_mmol_L
S_error
Sr_umol_L_1
Sr_error_1
B_umol_L
B_error
Ba_umol_L
Ba_error
Li_umol_L
Li_error
P_umol_L
P_error
Si_umol_L
Si_error
Sr_umol_L_ICPOES
Sr_error_ICPOES
Nd143_Nd144
SD2_int_1
eNd
SD2_int_2
DOC_uM
pcnt_STDEV
Oxygen_Optode_pcnt_as
NO3_NO2_uM
PO4_uM
Si_uM
Alpkem RFA 300
centrifuge
GVI (now Elementar) Isoprime 1000
MC800 multi-corer
Elemental Scientific seaFAST-pico
Rhizon samplers
V-CSN/TNM-1 (Shimadzu Corp)
Technicon AutoAnalyzer II
Neptune Plus MC-ICP-MS (Thermo-Fisher)
theme
None, User defined
station
latitude
longitude
date
depth_bottom
depth core
trace metal concentration
Calcium
potassium
Magnesium
Sodium
Sulfur (S)
Nd143_144
dissolved organic Carbon
O2 saturation
nitrate plus nitrite
phosphate
Silicic acid
featureType
BCO-DMO Standard Parameters
Alpkem RFA300
Centrifuge
Elemental Analyzer
Multi Corer
SeaFAST Automated Preconcentration System
Sediment Porewater Sampler
Shimadzu TOC-V Analyzer
Technicon AutoAnalyzer II
Thermo Finnigan Neptune inductively coupled plasma mass spectrometer
instrument
BCO-DMO Standard Instruments
KM2012
service
Deployment Activity
Equatorial Pacific
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.
Collaborative Research: How and Why eNd Tracks Ocean Circulation
https://osprey.bco-dmo.org/project/919728
Collaborative Research: How and Why eNd Tracks Ocean Circulation
<p><em>NSF Award Abstract:</em><br />
Circulation of water is a fundamental trait of the oceans that impacts its physics, chemistry and biology; however, understanding modern and past patterns of circulation - especially in the vast bodies of deep water - is challenging because global circulation defies direct measurement. The problems with direct measurement largely stem from the vast scales of space and time that are of interest in understanding global circulation. One tool for estimating global circulation patterns that holds promise is seen in neodymium isotopes which appear to be powerful tracers of deep ocean circulation, over a variety of timescales. Unfortunately, the elemental behavior of neodymium contrasts the isotopic behavior of neodymium in the oceans, a puzzle branded the "neodymium paradox." This inconsistency of geochemical behavior opens to question the application of neodymium isotopes as a tracer of circulation. Therefore, scientists from Oregon State University, Tulane University, and Bigelow Laboratory of Ocean Sciences propose to test the hypothesis that there is a yet unconstrained (even poorly identified) source of neodymium to the oceans that can explain the discrepancies seen between the elemental and isotopic neodymium marine budgets. The scientists further seek to understand the mechanistic cause of this source and thus be able to start making global constraints on its influence. Understanding these processes will fundamentally change our interpretations of neodymium data and allow us to more accurately quantify ocean circulation with a greater degree of confidence. For outreach activities, the scientists plan to participate in open house days held at Oregon State University, da Vinci days, National Ocean Science Bowls, Salmon Bowl and Bigelow Laboratory for Ocean Sciences' Cafe Scientifique. Undergraduate students and one graduate student from Tulane University would be supported and trained as part of this project.</p>
<p>Scientists from Oregon State University, Tulane University, and Bigelow Laboratory for Ocean Sciences propose to test the hypothesis that there is a benthic source of neodymium (Nd) to the oceans that exerts a primary control over the distribution of this element and its isotopes (eNd) in the ocean. This benthic flux results from early diagenetic reactions that release rare earth elements (REEs) from the solid phase to pore fluid. The scientists contend this flux will explain eNd distributions throughout the modern and past global oceans. The planned research will be guided by three questions:</p>
<p>(1) What are the mechanisms that control the magnitude and isotope composition of the benthic flux?<br />
(2) What are the relationships among bottom water, pore fluid, and the terminal solid phase compositions? Particularly, how and under what chemical conditions does an eNd signature become part of a preserved archival record of [Nd] and eNd?<br />
(3) Can our understanding of the deep water benthic fluxes account for the integrated bottom water eNd as a function of apparent water mass age and circulation path (e.g., how do the pore fluid and solid phase values reconcile with the existing water column signature and water mass age data)?</p>
<p>To test these ideas, sediments and their pore fluids will be collected from a diverse set of deep sea sites in the Pacific Ocean that reflect slow-to-fast sedimentation rates, carbonate-, terrigenous-, volcaniclastic- and siliceous-sediment, and low-to-high organic carbon. The sediments and porewater samples, as well as samples from the overlying water column will be characterized for the following parameters: major, minor, and trace metals, Nd isotopes, carbonate chemistry, oxygen, nutrients, particulate organic carbon, particulate organic nitrogen, radiocarbon, porosity, and grain size. With these observations we will build a quantitative numeric geochemical model (e.g., PHREEQC, Geochemist's Workbench, Humic Ion Binding Model) that can capture the cardinal controls over the benthic source. Our goal is to provide a new interpretive framework for Nd and eNd, such that we can offer quantitative estimates of benthic fluxes for use in models of global circulation. This work has potentially transformative implications on our understanding and application of REEs and Nd isotope data in both the modern and ancient oceans.</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>
Pacific Porewater Nd
largerWorkCitation
project
eng; USA
oceans
Equatorial Pacific
-152
-152
3
11
2020-10-14
2020-10-24
Central Pacific
0
BCO-DMO catalogue of parameters from Geochemical composition of sediment pore water samples collected in the Equatorial Pacific during October and November 2020 on R/V Kilo Moana cruise KM2012
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/928330.rdf
Name: Station_Number
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/928331.rdf
Name: Latitude
Units: degrees North
Description: <p>Latitude of sampling site in degrees North</p>
http://lod.bco-dmo.org/id/dataset-parameter/928332.rdf
Name: Longitude
Units: degrees East
Description: <p>Longitude of sampling site in degrees East (negative values are West)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928333.rdf
Name: Date
Units: unitless
Description: <p>Date of sampling</p>
http://lod.bco-dmo.org/id/dataset-parameter/928334.rdf
Name: bottom_depth
Units: meters (m)
Description: <p>Depth to seafloor</p>
http://lod.bco-dmo.org/id/dataset-parameter/928335.rdf
Name: nominal_depth
Units: centimeters (cm)
Description: <p>Due to the nature of pore water sampling, the exact depth of sampling is not exact. We have provided the best median-depth for the sample taken such that it is comparable to other data/pore water/sediment. The resolution we used for these "nominal depths" is 0.5 cm.</p>
http://lod.bco-dmo.org/id/dataset-parameter/928336.rdf
Name: La_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Lanthanum (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928337.rdf
Name: Ce_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Cesium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928338.rdf
Name: Pr_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Praseodymium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928339.rdf
Name: Nd_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Neodymium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928340.rdf
Name: Sm_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Samarium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928341.rdf
Name: Eu_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Europium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928342.rdf
Name: Gd_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Gadolinium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928343.rdf
Name: Tb_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Terbium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928344.rdf
Name: Dy_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Dysprosium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928345.rdf
Name: Ho_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Holmium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928346.rdf
Name: Er_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Erbium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928347.rdf
Name: Tm_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Thulium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928348.rdf
Name: Yb_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Ytterbium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928349.rdf
Name: Lu_pM
Units: picomolar (pmol/L)
Description: <p>REE concentration: Lutetium (filtered at <0.45um; error=10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928350.rdf
Name: Co_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Cobalt (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928351.rdf
Name: Ni_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Nickel (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928352.rdf
Name: Cu_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Copper (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928353.rdf
Name: Zn66_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Zinc (filtered at <0.45um; error=5%) based on analyses of 66Zn</p>
http://lod.bco-dmo.org/id/dataset-parameter/928354.rdf
Name: Zn68_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Zinc (filtered at <0.45um; error=5%) based on analyses of 68Zn</p>
http://lod.bco-dmo.org/id/dataset-parameter/928355.rdf
Name: Mo_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Molybdenum (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928356.rdf
Name: Cd_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Cadmium (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928357.rdf
Name: Pb_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Lead (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928358.rdf
Name: U_nM
Units: nanomolar (nmol/L)
Description: <p>Trace metal concentration: Uranium (filtered at <0.45um; error=5%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928359.rdf
Name: Ca_mmol_L
Units: millimolar (mmol/L)
Description: <p>Major ion: Calcium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928360.rdf
Name: Ca_error
Units: millimolar (mmol/L)
Description: <p>Calcium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928361.rdf
Name: K_mmol_L
Units: millimolar (mmol/L)
Description: <p>Major ion: Potassium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928362.rdf
Name: K_error
Units: millimolar (mmol/L)
Description: <p>Potassium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928363.rdf
Name: Mg_mmol_L
Units: millimolar (mmol/L)
Description: <p>Major ion: Magnesium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928364.rdf
Name: Mg_error
Units: millimolar (mmol/L)
Description: <p>Magnesium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928365.rdf
Name: Na_mmol_L
Units: millimolar (mmol/L)
Description: <p>Major ion: Sodium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928366.rdf
Name: Na_error
Units: millimolar (mmol/L)
Description: <p>Sodium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928367.rdf
Name: S_mmol_L
Units: millimolar (mmol/L)
Description: <p>Major ion: Sulfur (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928368.rdf
Name: S_error
Units: millimolar (mmol/L)
Description: <p>Sulfur error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928369.rdf
Name: Sr_umol_L_1
Units: micromolar (umol/L)
Description: <p>Major ion: Strontium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928370.rdf
Name: Sr_error_1
Units: micromolar (umol/L)
Description: <p>Strontium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928371.rdf
Name: B_umol_L
Units: micromolar (umol/L)
Description: <p>Major ion: Boron (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928372.rdf
Name: B_error
Units: micromolar (umol/L)
Description: <p>Boron error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928373.rdf
Name: Ba_umol_L
Units: micromolar (umol/L)
Description: <p>Major ion: Barium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928374.rdf
Name: Ba_error
Units: micromolar (umol/L)
Description: <p>Barium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928375.rdf
Name: Li_umol_L
Units: micromolar (umol/L)
Description: <p>Major ion: Lithium (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928376.rdf
Name: Li_error
Units: micromolar (umol/L)
Description: <p>Lithium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928377.rdf
Name: P_umol_L
Units: micromolar (umol/L)
Description: <p>Major ion: Phosphorus (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928378.rdf
Name: P_error
Units: micromolar (umol/L)
Description: <p>Phosphorus error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928379.rdf
Name: Si_umol_L
Units: micromolar (umol/L)
Description: <p>Major ion: Silicon (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928380.rdf
Name: Si_error
Units: micromolar (umol/L)
Description: <p>Silicon error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928381.rdf
Name: Sr_umol_L_ICPOES
Units: micromolar (umol/L)
Description: <p>Major ion: Strontium (Filtered at <0.45um; Measured by ICP-OES)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928382.rdf
Name: Sr_error_ICPOES
Units: micromolar (umol/L)
Description: <p>Strontium error of analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/928383.rdf
Name: Nd143_Nd144
Units: unitless
Description: <p>Isotope ratio of Neodymium-143 to Neodymium-144</p>
http://lod.bco-dmo.org/id/dataset-parameter/928384.rdf
Name: SD2_int_1
Units: unitless
Description: <p>Two sigma standard deviation of 143Nd/144Nd integrated measurements</p>
http://lod.bco-dmo.org/id/dataset-parameter/928385.rdf
Name: eNd
Units: unitless
Description: <p>Neodymium isotope composition given in epsilon notation (deviation of 143Nd/144Nd ratio from CHUR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928386.rdf
Name: SD2_int_2
Units: unitless
Description: <p>Two sigma standard deviation of 143Nd/144Nd integrated measurements in epsilon notation</p>
http://lod.bco-dmo.org/id/dataset-parameter/928387.rdf
Name: DOC_uM
Units: micromolar (umol/L)
Description: <p>Dissolved organic carbon (Filtered at <0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/928388.rdf
Name: pcnt_STDEV
Units: unitless
Description: <p>Two sigma standard deviation of DOC measurements</p>
http://lod.bco-dmo.org/id/dataset-parameter/928389.rdf
Name: Oxygen_Optode_pcnt_as
Units: percent saturation
Description: <p>Dissolved oxygen concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/928390.rdf
Name: NO3_NO2_uM
Units: micromolar (umol/L)
Description: <p>Total dissolved nitrate plus nitrite</p>
http://lod.bco-dmo.org/id/dataset-parameter/928391.rdf
Name: PO4_uM
Units: micromolar (umol/L)
Description: <p>Total dissolved phosphate</p>
http://lod.bco-dmo.org/id/dataset-parameter/928392.rdf
Name: Si_uM
Units: micromolar (umol/L)
Description: <p>Dissolved silicious acid</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
25411
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/143d2f3d-6a9e-4055-bd49-305d35619101/content
download
https://doi.org/10.26008/1912/bco-dmo.928246.1
download
onLine
dataset
<p>Water column, sediment, and pore water samples were collected following the methods in Abbott et al. (2015) during R/V Kilo Moana cruise KM2012 in October and November 2020. Pore water aliquots for REE (Rare Earth Elemental) concentration and εNd were collected by centrifuge and filtration (&lt;0.45 micrometers (μm)). The REE aliquots were extracted from one core, while the εNd aliquots were multiple, combined extractions from corresponding layers of 20 to 25 cores. See 'Related Datasets' for the data from the water column samples and sediment cores.</p>
<p>Pore water aliquots for nutrient analyses were extracted using Rhizon samplers and filtered (&lt;0.2 µm). Pore water aliquots for DOC analysis were extracted via Rhizon, filtered (&lt;0.45 μm with GFF filter), poisoned with mercuric chloride, and stored in a glass vial.</p>
<p>Pore water dissolved O2 concentration was measured using a fiber-optic oxygen microsensor inserted into pre-drilled holes through the core into the sediments. The sensor readings are converted to oxygen concentration by linearly calibrating against the published bottom water O2 concentration at the study sites.</p>
<p>Pore water pH was measured on unfiltered samples using a portable pH sensor post-extraction via centrifugation. Analyses of pH in pore waters is notoriously difficult due to the changes in pressure upon recovery, and thus the pH data have finite utility.</p>
<p>Elemental concentrations, including the REEs, were analyzed at Oregon State University (OSU) using an Elemental Scientific seaFAST-pico offline preconcentration technique, and the procedure has been extensively documented as part of the GEOTRACES intercalibration effort (Behrens et al., 2016). Elemental concentrations of the εNd aliquots (~10 milliliters (mL)) were analyzed at ETH Zurich using Nobias Chelate-PA1 resin in a manual column procedure (K. Deng et al., 2022).</p>
<p>Isotope analysis of the εNd aliquots (400~700 mL of pore water or ~1.5 liters (L) of seawater) were done at ETH Zurich. Samples were buffered to a pH of 5.5 ± 5 and pre-concentrated using an in-house extraction manifold containing Nobias Chelate-PA1 resin. After pre-concentration, separation of Nd from the matrix elements and other REE was done using Eichrom RE and LN spec resins. Procedural blanks are &lt;3 picograms (pg). Isotope analysis was done on an Neptune Plus MC-ICP-MS (Thermo-Fisher) following the procedure of Vance and Thirlwall (2002). Internally normalized sample data was renormalized to the 143Nd/144Nd ratio of La Jolla (Thirlwall, 1991). Repeated analysis of 8 parts per billion (ppb) La Jolla solutions results in a long-term external reproducibility of 0.27 ε (2σ). Nd isotope analysis was also quality-controlled by repeated measurements of the USGS reference materials BCR-2 (εNd = -0.11 ± 0.25, 2σ) and BHVO-2 (εNd = 6.70 ± 0.24, 2σ) at the same concentration (5-10 ppb) as the pore water samples in agreement with literature results (Jochum et al., 2005).</p>
<p>Nutrients were analyzed at Oregon State University using Technicon AutoAnalyzer II (phosphate and ammonium) and Alpkem RFA 300 (silicic acid, nitrate+nitrite). The method and data processing follow Gordon et al. (1993). DOC was analyzed with a V-CSN/TNM-1 (Shimadzu Corp, Kyoto, Japan) at the Scripps Institution of Oceanography following White et al. (2023).</p>
<p>Sediment samples were analysed for total organic carbon contents using a GVI (now Elementar) Isoprime 1000 with Eurovector EA at Bigelow Laboratory for Ocean Sciences. Samples were measured for the total carbon (organic plus inorganic) and a separate sample split was acidified to remove carbonate and then measured for the organic fraction.</p>
<p>X-ray diffraction (XRD) of freeze-dried raw samples were made at K/T GeoServices Inc. (Colorado, USA), using a Siemens D500 automated powder diffractometer equipped with a copper X-ray source (40kV, 30mA) and a scintillation X-ray detector. Semi-quantitative determinations of whole-sediment mineral amounts were done using Jade Software (Materials Data, Inc.) with the Whole Pattern Fitting option.</p>
Specified by the Principal Investigator(s)
- Imported sheet "BCO-DMO pore water" from original file "BCO-DMOv2.xlsx" into the BCO-DMO system.
- Renamed fields to comply with BCO-DMO naming conventions.
- Corrected bottom depth of station 4 from 505 to 5050.
- Saved the final file as "928246_v1_pore_water_geochemical_composition.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
Alpkem RFA 300
Alpkem RFA 300
PI Supplied Instrument Name: Alpkem RFA 300 Instrument Name: Alpkem RFA300 Instrument Short Name:Alpkem RFA300 Instrument Description: A rapid flow analyser (RFA) that may be used to measure nutrient concentrations in seawater. It is an air-segmented, continuous flow instrument comprising a sampler, a peristaltic pump which simultaneously pumps samples, reagents and air bubbles through the system, analytical cartridge, heating bath, colorimeter, data station, and printer. The RFA-300 was a precursor to the smaller Alpkem RFA/2 (also RFA II or RFA-2). Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0414/
centrifuge
centrifuge
PI Supplied Instrument Name: centrifuge Instrument Name: Centrifuge Instrument Short Name: Instrument Description: A machine with a rapidly rotating container that applies centrifugal force to its contents, typically to separate fluids of different densities (e.g., cream from milk) or liquids from solids.
GVI (now Elementar) Isoprime 1000
GVI (now Elementar) Isoprime 1000
PI Supplied Instrument Name: GVI (now Elementar) Isoprime 1000 Instrument Name: Elemental Analyzer Instrument Short Name: Instrument Description: Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/
MC800 multi-corer
MC800 multi-corer
PI Supplied Instrument Name: MC800 multi-corer Instrument Name: Multi Corer Instrument Short Name:Multi Corer Instrument Description: The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/51/
Elemental Scientific seaFAST-pico
Elemental Scientific seaFAST-pico
PI Supplied Instrument Name: Elemental Scientific seaFAST-pico Instrument Name: SeaFAST Automated Preconcentration System Instrument Short Name: Instrument Description: The seaFAST is an automated sample introduction system for analysis of seawater and other high matrix samples for analyses by ICPMS (Inductively Coupled Plasma Mass Spectrometry).
Rhizon samplers
Rhizon samplers
PI Supplied Instrument Name: Rhizon samplers Instrument Name: Sediment Porewater Sampler Instrument Short Name: Instrument Description: A device that collects samples of pore water from various horizons below the seabed.
V-CSN/TNM-1 (Shimadzu Corp)
V-CSN/TNM-1 (Shimadzu Corp)
PI Supplied Instrument Name: V-CSN/TNM-1 (Shimadzu Corp) Instrument Name: Shimadzu TOC-V Analyzer Instrument Short Name:Shimadzu TOC-V Instrument Description: A Shimadzu TOC-V Analyzer measures DOC by high temperature combustion method. Community Standard Description: http://onto.nerc.ac.uk/CAST/124
Technicon AutoAnalyzer II
Technicon AutoAnalyzer II
PI Supplied Instrument Name: Technicon AutoAnalyzer II Instrument Name: Technicon AutoAnalyzer II Instrument Short Name: Instrument Description: A rapid flow analyzer that may be used to measure nutrient concentrations in seawater. It is a continuous segmented flow instrument consisting of a sampler, peristaltic pump, analytical cartridge, heating bath, and colorimeter. See more information about this instrument from the manufacturer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0291/
Neptune Plus MC-ICP-MS (Thermo-Fisher)
Neptune Plus MC-ICP-MS (Thermo-Fisher)
PI Supplied Instrument Name: Neptune Plus MC-ICP-MS (Thermo-Fisher) Instrument Name: Thermo Finnigan Neptune inductively coupled plasma mass spectrometer Instrument Short Name:Neptune ICP-MS Instrument Description: A laboratory high mass resolution inductively coupled plasma mass spectrometer (ICP-MS) designed for elemental and isotopic analysis. The instrument is based on a multicollector platform, comprising eight moveable collector supports and one fixed center channel equipped with a Faraday cup and, optionally, an ion counter with or without a retardation lens. The Faraday cup is connected to a current amplifier, whose signal is digitized by a high linearity voltage to frequency converter. The instrument was originally manufactured by Thermo Finnigan, which has since been replaced by Thermo Scientific (part of Thermo Fisher Scientific). This model is no longer in production.
Cruise: KM2012
KM2012
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel
KM2012
Brian Haley
Oregon State University
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel