http://lod.bco-dmo.org/id/dataset/3856
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
2013-01-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa, NW Pacific from R/V Sonne SO202 in the North Pacific and the Bering Sea from July 2009 (Sources-Sinks Th-Pa project)
2013-01-16
publication
2013-01-16
revision
BCO-DMO Linked Data URI
2013-01-16
creation
http://lod.bco-dmo.org/id/dataset/3856
Robert F. Anderson
Lamont-Doherty Earth Observatory
principalInvestigator
Martin Q. Fleisher
Lamont-Doherty Earth Observatory
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: Anderson, R. F., Fleisher, M. Q. (2013) Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa, NW Pacific from R/V Sonne SO202 in the North Pacific and the Bering Sea from July 2009 (Sources-Sinks Th-Pa project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2013-01-16 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3856 [access date]
Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa, NW Pacific Dataset Description: <p>Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa at seven sites in the NW Pacific.</p>
<p>This dataset is published:<br />
Hayes, C.T., Anderson, R.F., Jaccard, S.L., François, R., Fleisher, M.Q., Soon, M., Gersonde, R., 2013. A new perspective on boundary scavenging in the North Pacific Ocean. Earth Planet. Sci. Lett. 369-370, 86-97.<br />
<a href="http://dx.doi.org/10.1016/j.epsl.2013.03.008">http://dx.doi.org/10.1016/j.epsl.2013.03.008</a><br />
<a href="http://www.sciencedirect.com/science/article/pii/S0012821X13001295">http://www.sciencedirect.com/science/article/pii/S0012821X13001295</a></p>
<p>These data are also available through PANGAEA:&nbsp;http://doi.pangaea.de/10.1594/PANGAEA.811760</p> Methods and Sampling: <p><strong>Sampling and Analytical Methodology:&nbsp; </strong><br />
Water samples were collected with a Sea-Bird Electronics CTD carousel fitted with 24 10-liter PVC Niskin bottles. The carousel was lowered from the ship with steel wire. Niskin bottles caps were held together with rubber tubing. After collection seawater was drained with Teflon-lined TygonTM tubing and filtered through Pall AcropakTM 500 filters on deck (gravity filtration, 0.8/0.45 µm pore size) into Fisher I-Chem series 300 LDPE cubitainers. Approximately 9-10 L was collected per desired depth. Prior to the cruise, the tubing, filters and cubitainers were cleaned by immersion in 1.2 M HCl (Fisher Scientific Trace Metal Grade) for 4-5 days. Once filtered, samples were adjusted to a pH ~2 with ultra-clean 6 M HCl (Tama Chemicals, TAMAPURE-AA-100 grade), double-bagged and stored at room temperature as packaged until analysis.</p>
<p>In the on-shore laboratory, samples were weighed to determine sample size, taking into account the weight of the cubitainer and of the acid added at sea. Four to five liters of the original sample was used for Th/Pa analysis, the remaining sample kept as archive. Then weighed aliquots of the artificial isotope yield monitors 229Th (20 pg) and 233Pa (0.5 pg) and 15 mg dissolved Fe were added to each sample. After allowing 1 day for spike equilibration, the pH of each sample was raised to 8-8.5 by adding ~10 mL of concentrated NH4OH (Fisher Scientific OPTIMA grade) which caused iron (oxy)hydroxide precipitates to form. This precipitate was allowed to settle for 1-2 days before the overlaying seawater was siphoned off. The Fe precipitate was transferred to centrifuge tubes for centrifugation and rinsing with Milli-Q H2O (&gt;18 MO) to remove the major seawater ions. The precipitate was then dissolved in 16 M HNO3 (Fisher Scientific OPTIMA grade) and transferred to a Teflon beaker for a high-temperature (180-200°C) digestion with HClO4 and HF (Fisher Scientific OPTIMA grade) on a hotplate in a HEPA-filtered laminar flow hood. After total dissolution of the sample, another precipitation of iron (oxy)hydroxide followed and the precipitate was washed with Mill-Q H2O, centrifuged, and dissolved in 12 M HCl for a series of anion-exchange chromatography using 6 mL polypropylene columns each containing a 1 mL bed of Bio-rad resin (AG1-X8, 100-200 mesh size) and a 45 µm porous polyethylene frit. The final column elutions were dried down at 180°C in the presence of 2 drops of HClO4 and taken up in approximately 1 mL of 0.16 M HNO3/0.026 M HF for mass spectrometric analysis.&nbsp;</p>
<p>Concentrations of 232Th, 230Th and 231Pa were calculated by isotope dilution using nuclide ratios determined on a VG Elemental AXIOM Single Collector Magnetic Sector ICP-MS with a Resolving Power of ~400 to ensure the highest sensitivity. All measurements were done using a peak jumping routine in ion counting mode. A solution of SRM129, a natural U standard, was run to determine the mass bias correction (assuming that the mass fractionation for Th and Pa are the same as for U). Each sample measurement was bracketed by measurement of an aliquot of the run solution, used to correct for the instrument background count rates on the masses measured. To correct for potential tailing of 232Th into the minor Th and Pa isotopes, beam intensities were measured at the half masses above and below each mass for 230Th, 231Pa, and 233Pa. Tailing under each minor isotope was estimated as the log mean intensity of the half masses on either side of each minor isotope.</p>
<p>Water samples were analyzed in batches of 10-12. Procedural blanks were determined by processing 4-5 L of Milli-Q water in an acid-cleaned cubitainer acidified to pH ~2 with 6 M HCl as a sample in each batch. An aliquot of an intercalibrated working standard solution of 232Th, 230Th and 231Pa, SW STD 2010-1 referred to by Anderson et al. (2012), was added to a separate cubitainer with 5 L of Milli-Q water (acidified to pH 2) and also processed like a sample in each batch. Total procedural blanks for 232Th, 230Th, and 231Pa ranged from 7.1-24.3 pg, 0.8-1.6 fg, and 0.02-0.2 fg respectively. One batch had an anomalously high 232Th blank of 140 pg (with 230Th and 231Pa in the reported range). Application of this blank correction to the analyzed SW STD caused an anomalously low estimate of its 232Th concentration (approximately 990 ± 15 pg/g). From this we concluded the blank was due to random contamination of the procedural blank and it should not be used to blank-correct samples. Instead, we determined what magnitude of blank correction would be necessary for the analyzed SW STD to achieve the intercalibrated concentration. This was 12 pg 232Th, which is close to the average blank value measured throughout the course of this project.&nbsp;&nbsp;&nbsp;</p>
<p>Further details on sampling and analysis are given by Anderson et al. (2012).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1029211 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1029211
completed
Robert F. Anderson
Lamont-Doherty Earth Observatory
845-365-8508
61 U.S. Route 9W, P.O. Box 1000 231 Comer Building
Palisades
NY
10964-8000
USA
boba@ldeo.columbia.edu
pointOfContact
Martin Q. Fleisher
Lamont-Doherty Earth Observatory
845-365-8632
233 Comer Bldg. 61 Route 9W
Palisades
NY
10964
USA
martyq@ldeo.columbia.edu
pointOfContact
asNeeded
Unknown
cruise_id
sta
lat
lon
depth
press
O2
sal
temp
date_collected
date_U_separation
Th232
Th232_err
Th232_flag
Th230
Th230_err
Th230_flag
Pa231
Pa231_err
Pa231_flag
lon_360
CTD Sea-Bird
Mass Spectrometer
Niskin bottle
theme
None, User defined
Cruise identfier
station number
latitude
longitude
depth
water pressure
dissolved Oxygen
salinity
water temperature at measurement depth
date_utc
Thorium-232
Th232_err
flag
Thorium-230
Th230_err
Protactinium-231
Pa231_err
longitude from 0 to 360 degrees
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
SO202
service
Deployment Activity
North Pacific and the Bering Sea
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.
Innovative North Pacific Experiment
http://www.ldeo.columbia.edu/~cth/inopex.htm
Innovative North Pacific Experiment
Expedition of the research vessel "Sonne" to the subpolar North Pacific and the Bering Sea in 2009 (SO202-INOPEX) around the Pacific subarctic gyre sampling seawater and ocean sediments.
INoPEx
largerWorkCitation
program
Boundary Sources and Sinks of 230Th, 232Th and 231Pa in the NW Pacific
http://epic.awi.de/30138/
Boundary Sources and Sinks of 230Th, 232Th and 231Pa in the NW Pacific
<p>Abstract:</p>
<p>The spatial distributions of the isotopes of thorium (Th) and protactinium (Pa) have previously been used to support the notion that there is enhanced "boundary scavenging" of particle reactive substances (i.e. their preferential removal from seawater) at ocean margins. However, recent evidence suggests that spatial variability in the chemical fractionation between Th and Pa (i.e. differential partitioning between the dissolved and particulate phases) may influence sedimentary 231Pa/230Th ratios as much as, or even more than, enhanced scavenging at margins. If true, then preferential removal of particle-reactive solutes at ocean margins may be less significant than previously believed.</p>
<p>Further research is needed to examine these two processes, and the proposed study by researchers at the Lamont Doherty Earth Observatory at Columbia University will address this problem and related objectives by analyzing samples collected at a location in the Subarctic North Pacific Ocean for the concentration and distribution of dissolved 230Th, 232Th and 231Pa together with analysis of their concentration in surface sediments. The samples have already been collected. Additional objectives of the proposed work include assessing the boundary sources and sinks for each isotope, the near bottom gradients and testing the hypothesis that enhanced scavenging near the sediment-water interface creates a significant sink at the base of the pelagic water column. Additionally, the potential regeneration and flux from settling labile biogenic particles, from the dissolution of lithogenic phases and/or mobilization of colloids will be evaluated in conjunction with an examination of the role of particulate phase composition in controlling chemical fractionation. The results will be used in modeling efforts aimed at examining the importance of the various processes outlined above. The proposed work will improve understanding of the enhancement of chemical scavenging and removal of particle-reactive substances at ocean margins.</p>
<p>The research will be beneficial to investigators in a variety of fields besides chemical oceanography, notably paleoceanography. The results will inform the debate concerning the applicability of sedimentary 231Pa/230Th ratios as a proxy for deep ocean circulation, and the validity and importance of various conclusions derived from prior research. The research will provide further information on aspects of sediment-water exchange of reactive substances. The results may also inform the research that will be conducted in the Pacific Ocean in the future as part of the GEOTRACES Program.</p>
<p>Broader Impacts: The scientific aspects of the research focus on improving the understanding the importance of boundary margin scavenging. Such knowledge is necessary for understanding the ocean biogeochemistry of many elements, not just the isotopes that are the focus of this study. The educational aspects of the proposal relate to graduate student education and related activities. </p>
Sources-Sinks Th-Pa
largerWorkCitation
project
eng; USA
oceans
North Pacific and the Bering Sea
2013-01-16
Subarctic North Pacific and Bering Sea
0
BCO-DMO catalogue of parameters from Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa, NW Pacific from R/V Sonne SO202 in the North Pacific and the Bering Sea from July 2009 (Sources-Sinks Th-Pa 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/32108.rdf
Name: cruise_id
Units: text
Description: <p>cruise ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/32109.rdf
Name: sta
Units: integer
Description: <p>station number within cruise</p>
http://lod.bco-dmo.org/id/dataset-parameter/32110.rdf
Name: lat
Units: decimal degrees
Description: <p>station latitude; North is positive</p>
http://lod.bco-dmo.org/id/dataset-parameter/32111.rdf
Name: lon
Units: decimal degrees
Description: <p>station longitude; East is positive. Added by Data Mgmt.Office.</p>
http://lod.bco-dmo.org/id/dataset-parameter/32112.rdf
Name: depth
Units: meters
Description: <p>sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/32113.rdf
Name: press
Units: decibars
Description: <p>hydrostatic pressure</p>
http://lod.bco-dmo.org/id/dataset-parameter/32114.rdf
Name: O2
Units: milliliters O2/liter seawater
Description: <p>Dissolved oxygen concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/32115.rdf
Name: sal
Units: dimensionless (PSS-78 scale)
Description: <p>Practical salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/32116.rdf
Name: temp
Units: degrees centrigrade (ITS-90 scale)
Description: <p>Temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/32117.rdf
Name: date_collected
Units: yyyymmdd
Description: <p>date sample was collected, UTC</p>
http://lod.bco-dmo.org/id/dataset-parameter/32118.rdf
Name: date_U_separation
Units: yyyymmdd
Description: <p>date Uranium was separated from Th/Pa, UTC</p>
http://lod.bco-dmo.org/id/dataset-parameter/32119.rdf
Name: Th232
Units: picograms 232Th/kilogram seawater
Description: <p>Dissolved 232Thorium concentration (<0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/32120.rdf
Name: Th232_err
Units: picograms 232Th/kilogram seawater
Description: <p>1 sigma uncertainty in dissolved 232Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/32121.rdf
Name: Th232_flag
Units: 1 = good; 2 = questionable; 3 = bad
Description: <p>Data quality flag for dissolved 232Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/32122.rdf
Name: Th230
Units: femtograms 230Th/kilogram seawater
Description: <p>Dissolved 230Thorium conc. (<0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/32123.rdf
Name: Th230_err
Units: femtograms 230Th/kilogram seawater
Description: <p>1 sigma uncertainty in dissolved 230Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/32124.rdf
Name: Th230_flag
Units: 1 = good; 2 = questionable; 3 = bad
Description: <p>Data quality flag for dissolved 230Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/32125.rdf
Name: Pa231
Units: femtograms 231Pa/kilogram seawater
Description: <p>Dissolved 231Protactinium conc. (<0.45um)</p>
http://lod.bco-dmo.org/id/dataset-parameter/32126.rdf
Name: Pa231_err
Units: femtograms 231Pa/kilogram seawater
Description: <p>1 sigma uncertainty in dissolved 231Pa</p>
http://lod.bco-dmo.org/id/dataset-parameter/32127.rdf
Name: Pa231_flag
Units: 1 = good; 2 = questionable; 3 = bad
Description: <p>Data quality flag for dissolved 231Pa</p>
http://lod.bco-dmo.org/id/dataset-parameter/34828.rdf
Name: lon_360
Units: decimal degrees
Description: <p>longitude ranging from 0 to 360 degrees; especially useful for data collected during sampling transects that cross the dateline</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
11389
https://datadocs.bco-dmo.org/file/rggpGAgUDPVvER/INOPEX_ThPa.csv
INOPEX_ThPa.csv
Primary data file for dataset ID 3856
download
https://osprey.bco-dmo.org/dataset/3856/data/download
download
onLine
dataset
<p><strong>Sampling and Analytical Methodology:&nbsp; </strong><br />
Water samples were collected with a Sea-Bird Electronics CTD carousel fitted with 24 10-liter PVC Niskin bottles. The carousel was lowered from the ship with steel wire. Niskin bottles caps were held together with rubber tubing. After collection seawater was drained with Teflon-lined TygonTM tubing and filtered through Pall AcropakTM 500 filters on deck (gravity filtration, 0.8/0.45 µm pore size) into Fisher I-Chem series 300 LDPE cubitainers. Approximately 9-10 L was collected per desired depth. Prior to the cruise, the tubing, filters and cubitainers were cleaned by immersion in 1.2 M HCl (Fisher Scientific Trace Metal Grade) for 4-5 days. Once filtered, samples were adjusted to a pH ~2 with ultra-clean 6 M HCl (Tama Chemicals, TAMAPURE-AA-100 grade), double-bagged and stored at room temperature as packaged until analysis.</p>
<p>In the on-shore laboratory, samples were weighed to determine sample size, taking into account the weight of the cubitainer and of the acid added at sea. Four to five liters of the original sample was used for Th/Pa analysis, the remaining sample kept as archive. Then weighed aliquots of the artificial isotope yield monitors 229Th (20 pg) and 233Pa (0.5 pg) and 15 mg dissolved Fe were added to each sample. After allowing 1 day for spike equilibration, the pH of each sample was raised to 8-8.5 by adding ~10 mL of concentrated NH4OH (Fisher Scientific OPTIMA grade) which caused iron (oxy)hydroxide precipitates to form. This precipitate was allowed to settle for 1-2 days before the overlaying seawater was siphoned off. The Fe precipitate was transferred to centrifuge tubes for centrifugation and rinsing with Milli-Q H2O (&gt;18 MO) to remove the major seawater ions. The precipitate was then dissolved in 16 M HNO3 (Fisher Scientific OPTIMA grade) and transferred to a Teflon beaker for a high-temperature (180-200°C) digestion with HClO4 and HF (Fisher Scientific OPTIMA grade) on a hotplate in a HEPA-filtered laminar flow hood. After total dissolution of the sample, another precipitation of iron (oxy)hydroxide followed and the precipitate was washed with Mill-Q H2O, centrifuged, and dissolved in 12 M HCl for a series of anion-exchange chromatography using 6 mL polypropylene columns each containing a 1 mL bed of Bio-rad resin (AG1-X8, 100-200 mesh size) and a 45 µm porous polyethylene frit. The final column elutions were dried down at 180°C in the presence of 2 drops of HClO4 and taken up in approximately 1 mL of 0.16 M HNO3/0.026 M HF for mass spectrometric analysis.&nbsp;</p>
<p>Concentrations of 232Th, 230Th and 231Pa were calculated by isotope dilution using nuclide ratios determined on a VG Elemental AXIOM Single Collector Magnetic Sector ICP-MS with a Resolving Power of ~400 to ensure the highest sensitivity. All measurements were done using a peak jumping routine in ion counting mode. A solution of SRM129, a natural U standard, was run to determine the mass bias correction (assuming that the mass fractionation for Th and Pa are the same as for U). Each sample measurement was bracketed by measurement of an aliquot of the run solution, used to correct for the instrument background count rates on the masses measured. To correct for potential tailing of 232Th into the minor Th and Pa isotopes, beam intensities were measured at the half masses above and below each mass for 230Th, 231Pa, and 233Pa. Tailing under each minor isotope was estimated as the log mean intensity of the half masses on either side of each minor isotope.</p>
<p>Water samples were analyzed in batches of 10-12. Procedural blanks were determined by processing 4-5 L of Milli-Q water in an acid-cleaned cubitainer acidified to pH ~2 with 6 M HCl as a sample in each batch. An aliquot of an intercalibrated working standard solution of 232Th, 230Th and 231Pa, SW STD 2010-1 referred to by Anderson et al. (2012), was added to a separate cubitainer with 5 L of Milli-Q water (acidified to pH 2) and also processed like a sample in each batch. Total procedural blanks for 232Th, 230Th, and 231Pa ranged from 7.1-24.3 pg, 0.8-1.6 fg, and 0.02-0.2 fg respectively. One batch had an anomalously high 232Th blank of 140 pg (with 230Th and 231Pa in the reported range). Application of this blank correction to the analyzed SW STD caused an anomalously low estimate of its 232Th concentration (approximately 990 ± 15 pg/g). From this we concluded the blank was due to random contamination of the procedural blank and it should not be used to blank-correct samples. Instead, we determined what magnitude of blank correction would be necessary for the analyzed SW STD to achieve the intercalibrated concentration. This was 12 pg 232Th, which is close to the average blank value measured throughout the course of this project.&nbsp;&nbsp;&nbsp;</p>
<p>Further details on sampling and analysis are given by Anderson et al. (2012).</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong></p>
<p>The reported errors for radionuclide concentrations represent the propagation of one sigma errors based on the standard deviation of five sequences of isotope ratios collected by ICP-MS, estimated error in the 229Th or 233Pa spike concentration, and the blank correction of the individual isotopes for each sample batch.</p>
<p>Analysis of all samples was completed over the course of 2 years. A correction was made to account for the ingrowth of 230Th and 231Pa due to the decay of the natural 234U and 235U preserved in the acidified samples during the period of time between sample collection and U-Th/Pa separation during anion exchange chromatography. Thus, the reported 230Th and 231Pa concentrations have been corrected to represent their concentrations at the time of sampling. U concentrations in the samples were estimated using the bottle salinity (S) measured from the CTD and the U-Salinity relationship of North Pacific seawater (Chen et al., 1986), [U] = (0.1115*S – 0.6356) ng U (g seawater)-1. We used seawater U-isotopic compositions of 234U/238 U = 1.1468 activity ratio (Andersen et al., 2010), and 238U/235U = 137.824 mole ratio (Weyer et al., 2008), to calculate [234U] and [235U] respectively based on [U]. In our submitted manuscript (Hayes et al., submitted) we converted gravimetric concentration (fg/kg) into volumetric activities (dpm m-3) for easier comparison to historical data. The half-lives used were 75,690 yrs for 230Th (Cheng et al., 2000), 32,760 yrs for 231Pa (Robert et al., 1969), 245,250 yrs for 234U (Cheng et al., 2000), and 7.0381 x 108 yrs for 235U (Jaffey et al. 1971).</p>
<p><strong>Related files and references:&nbsp; </strong><br />
Anderson, R.F., Fleisher, M.Q., Robinson, L.F., Edwards, R.L., Hoff, J., Moran, S.B., Rutgers van der Loeff, M.M., Thomas, A.L., Roy-Barman, M., François, R., 2012. GEOTRACES intercalibration of 230Th, 232Th, 231Pa, and prospects for 10Be. Limnol. Oceanogr. Methods 10, 179-213.</p>
<p>Chen, J.H., Lawrence Edwards, R., Wasserburg, G.J., 1986. 238U, 234U and 232Th in seawater. Earth Planet. Sci. Lett. 80, 241-251.</p>
<p>Cheng, H., Edwards, R.L., Hoff, J., Gallup, C.D., Richards, D.A., Asmerom, Y., 2000. The half-lives of uranium-234 and thorium-230. Chem. Geol. 169, 17-33.</p>
<p>Hayes, C.T., Anderson, R.F., Jaccard, S.L., Fleisher, M.Q., Soon, M., Gersonde, R., submitted. The nature of boundary scavenging in the North Pacific Ocean. Earth Planet. Sci. Lett.</p>
<p>Jaffey, A.H., Flynn, K.F., Glendenin, L.E., Bentley, W.C., Essling, A.M., 1971. Precision Measurement of Half-Lives and Specific Activities of 235U and 238U. Physical Review C 4, 1889-1906.</p>
<p>Robert, J., Miranda, C.F., Muxart, R., 1969. Mesure de la periode du protactinium-231 par microcalorimetrie. Radiochim. Acta 11, 104-108.</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
CTD Sea-Bird
CTD Sea-Bird
PI Supplied Instrument Name: CTD Sea-Bird Instrument Name: CTD Sea-Bird Instrument Short Name:CTD Sea-Bird Instrument Description: A Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics. This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/ Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Mass Spectrometer
Mass Spectrometer
PI Supplied Instrument Name: Mass Spectrometer PI Supplied Instrument Description:VG Elemental AXIOM Single Collector Magnetic Sector ICP-MS with a Resolving Power of ~400 to ensure the highest sensitivity Instrument Name: Mass Spectrometer Instrument Short Name:Mass Spec Instrument Description: 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/
Niskin bottle
Niskin bottle
PI Supplied Instrument Name: Niskin bottle PI Supplied Instrument Description:Sea-Bird Electronics CTD carousel fitted with 24 10-liter PVC Niskin bottles. Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument Description: A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Cruise: SO202
SO202
R/V Sonne
Community Standard Description
R/V Sonne
vessel
SO202
Dr Rainer Gersonde
Alfred Wegener Institute for Polar and Marine Research
http://epic.awi.de/30138/
Report describing SO202
R/V Sonne
Community Standard Description
R/V Sonne
vessel