http://lod.bco-dmo.org/id/dataset/782858
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
2019-11-25
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Sedimentary radium isotope activity around Guaymas Basin from samples collected by HOV Alvin during R/V Atlantis cruise AT37-06 in December 2016
2019-11-25
publication
2019-11-25
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-12-09
publication
https://doi.org/10.1575/1912/bco-dmo.782858.1
Richard N. Peterson
Coastal Carolina University
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: Peterson, R. (2019) Sedimentary radium isotope activity around Guaymas Basin from samples collected by HOV Alvin during R/V Atlantis cruise AT37-06 in December 2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-11-25 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.782858.1 [access date]
This dataset presents sedimentary radium isotope activities around Guaymas Basin Dataset Description: <p>This dataset presents sedimentary radium isotope activities around Guaymas Basin.</p> Methods and Sampling: <p>Samples for this dataset were collected as push cores using the HOV Alvin submersible. Analytical methods for measuring particulate Ra-224 and Th-228 are based on methods described in Cai et al. (2012; 2014). In short, once the cores were recovered on the ship, overlying waters were siphoned off and the sediment cores were sectioned in 2 cm vertical intervals for the top 10 cm, then 4 cm intervals for the remainder of the core. A slurry was prepared by adding ~¼ of the sediment volume (or ~1/8 of the sediment volume for the 4 cm intervals) to 150 mL of Ra-free tap water. The pH of the slurry was adjusted by adding 5-10 drops of concentrated NH3-OH, after which 1 mL of 19 mM KMnO4 and 1 mL of 40 mM MnCl2 solutions were added to precipitate any dissolved radium and thorium. A portion of this slurry was vacuum-filtered onto pre-weighed 47 mm diameter GFF filters until no further drops passed through the filter. Filters were dried in a drying oven (at 60 °C) for 12 hours, then placed is a filter holder within a cartridge and counted on a Radium Delayed Coincidence Counter (Moore and Arnold, 1996). Results from this analysis represent particulate Ra-224 activities. Filters were then measured on the Radium Delayed Coincidence Counter again after 3 weeks, from which the results are representative of Th-228 activities on the sediments.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1558829 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1558829
completed
Richard N. Peterson
Coastal Carolina University
843-349-4057
Department of Coastal and Marine Systems Science P.O. Box 261954
Conway
SC
29528-6054
USA
rpeters2@coastal.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Alivn_Dive_Num
Core_Num
Depth_Below_SWI
Date_Time
Latitude
Longitude
Filter_Mass
Ra224_Activity
Ra224_Unc
Th228_Activity
Th228_Unc
theme
None, User defined
dive_id
core id
depth below seafloor
ISO_DateTime_UTC
latitude
longitude
mass
radioactive isotope concentration
featureType
BCO-DMO Standard Parameters
Alvin tube core
Radium Delayed Coincidence Counter
instrument
BCO-DMO Standard Instruments
AT37-06
AT37-06_Alvin_Dives
service
Deployment Activity
Guaymas Basin
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.
Validation of a New Geochemical Approach to Constrain Deep Sea Porewater Residence Times and Advection Rates: Applications to Biogeochemical Cycling at Guaymas Basin
https://osprey.bco-dmo.org/project/754843
Validation of a New Geochemical Approach to Constrain Deep Sea Porewater Residence Times and Advection Rates: Applications to Biogeochemical Cycling at Guaymas Basin
<p><em>NSF Award Abstract:</em><br />
This project proposes to validate a new approach to measure porewater flow dynamics from deep sea sediments using a biologically conservative, naturally-occurring tracer, Radium 224, which is constantly produced by porewaters. The technique will be validated using independent measures of porewater fluxes (i.e. heat gradients and magnesium profiles) during a cruise to the Guaymas Basin in the Gulf of California that is already funded by NSF. Once validated the technique will be broadly applicable to all sedimentary environments including oceans, rivers/streams, wetlands and lakes. Understanding porewater flow dynamics is important to understanding ocean and other aquatic system chemical budgets, microbial ecology and global heat flow.</p>
<p>This proposal hypothesizes that the short-lived radium isotope Ra 224 may serve as an effective tracer of porewater flows in deep ocean systems, regardless of the type or composition of seepages, because its sources and sinks can be uniquely constrained. The method will be tested in the Guaymas Basin which is comprised of areas undergoing a range of seepage rates and offers porewater thermal gradients resulting from the hydrothermal system. As a result heat fluxes and gradients in magnesium and other cations affected by high-temperature water/rock interactions can be used to independently validate the porewater flows measured by Ra 224.</p>
Guaymas Basin Ra 224 Approach
largerWorkCitation
project
eng; USA
oceans
Guaymas Basin
-111.68317
-111.38469
27.00729
27.50622
2016-12-12
2016-12-21
Guaymas Basin, Gulf of California
0
BCO-DMO catalogue of parameters from Sedimentary radium isotope activity around Guaymas Basin from samples collected by HOV Alvin during R/V Atlantis cruise AT37-06 in December 2016
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/782931.rdf
Name: Alivn_Dive_Num
Units: unitless
Description: <p>Numeric identifier for Alvin dive</p>
http://lod.bco-dmo.org/id/dataset-parameter/782932.rdf
Name: Core_Num
Units: unitless
Description: <p>Core tube identifier for the specific Alvin dive</p>
http://lod.bco-dmo.org/id/dataset-parameter/782933.rdf
Name: Depth_Below_SWI
Units: centimeters (cm)
Description: <p>Sampling depth below the sediment-water interface (SWI)</p>
http://lod.bco-dmo.org/id/dataset-parameter/782934.rdf
Name: Date_Time
Units: unitless
Description: <p>Sampling date and time (GMT); format: yyyy-mm-ddTHH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/782935.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Sampling latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/782936.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Sampling longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/782937.rdf
Name: Filter_Mass
Units: grams (g)
Description: <p>Mass of dry sediments on filter</p>
http://lod.bco-dmo.org/id/dataset-parameter/782938.rdf
Name: Ra224_Activity
Units: dpm/g
Description: <p>Measured activity of Ra-224</p>
http://lod.bco-dmo.org/id/dataset-parameter/782939.rdf
Name: Ra224_Unc
Units: dpm/g
Description: <p>1-s analytical uncertainty in measured activity of Ra-224</p>
http://lod.bco-dmo.org/id/dataset-parameter/782940.rdf
Name: Th228_Activity
Units: dpm/g
Description: <p>Measured activity of Th-228</p>
http://lod.bco-dmo.org/id/dataset-parameter/782941.rdf
Name: Th228_Unc
Units: dpm/g
Description: <p>1-s analytical uncertainty in measured activity of Th-228</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
16829
https://darchive.mblwhoilibrary.org/bitstream/1912/24963/1/dataset-782858_guaymas-sedimentary-radium-at37-06__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.782858.1
download
onLine
dataset
<p>Samples for this dataset were collected as push cores using the HOV Alvin submersible. Analytical methods for measuring particulate Ra-224 and Th-228 are based on methods described in Cai et al. (2012; 2014). In short, once the cores were recovered on the ship, overlying waters were siphoned off and the sediment cores were sectioned in 2 cm vertical intervals for the top 10 cm, then 4 cm intervals for the remainder of the core. A slurry was prepared by adding ~¼ of the sediment volume (or ~1/8 of the sediment volume for the 4 cm intervals) to 150 mL of Ra-free tap water. The pH of the slurry was adjusted by adding 5-10 drops of concentrated NH3-OH, after which 1 mL of 19 mM KMnO4 and 1 mL of 40 mM MnCl2 solutions were added to precipitate any dissolved radium and thorium. A portion of this slurry was vacuum-filtered onto pre-weighed 47 mm diameter GFF filters until no further drops passed through the filter. Filters were dried in a drying oven (at 60 °C) for 12 hours, then placed is a filter holder within a cartridge and counted on a Radium Delayed Coincidence Counter (Moore and Arnold, 1996). Results from this analysis represent particulate Ra-224 activities. Filters were then measured on the Radium Delayed Coincidence Counter again after 3 weeks, from which the results are representative of Th-228 activities on the sediments.</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO Processing:<br />
- modified parameter names (changed hyphens to underscores; replaced spaces with underscores);<br />
- formatted date/time to ISO 8601 format;<br />
- corrected rows with value of "2019" as the year (changed to "2016");<br />
- saved&nbsp;Radium Delayed Coincidence Counter calibrations as PDF - see Supplemental Files.</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
PI Supplied Instrument Name: PI Supplied Instrument Description:Samples for this dataset were collected as push cores using the HOV Alvin submersible. Instrument Name: Alvin tube core Instrument Short Name:Tube Core Instrument Description: A plastic tube, about 40 cm (16 inches) long, is pushed into the sediment by Alvin's manipulator arm to collect a sediment core.
PI Supplied Instrument Name: PI Supplied Instrument Description:Filters were dried in a drying oven (at 60 °C) for 12 hours, then placed is a filter holder within a cartridge and counted on a Radium Delayed Coincidence Counter. Instrument Name: Radium Delayed Coincidence Counter Instrument Short Name:RaDeCC Instrument Description: The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996).
References:
Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757.
Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. J. Geophys. Res., 101 (1996), pp. 1321-1329.
Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.
Cruise: AT37-06
AT37-06
R/V Atlantis
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantis
vessel
AT37-06
Andreas Teske
University of North Carolina at Chapel Hill
https://datadocs.bco-dmo.org/d3/data_docs/GuaymasBasin_Interactions/AT37-06_CruiseReport.pdf
Report describing AT37-06
Deployment: AT37-06_Alvin_Dives
AT37-06_Alvin_Dives
HOV Alvin
Community Standard Description
International Council for the Exploration of the Sea
HOV Alvin
submarine-manned
AT37-06_Alvin_Dives
Andreas Teske
University of North Carolina at Chapel Hill
https://datadocs.bco-dmo.org/d3/data_docs/GuaymasBasin_Interactions/AT37-06_CruiseReport.pdf
Report describing AT37-06_Alvin_Dives
R/V Atlantis
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantis
vessel
HOV Alvin
Community Standard Description
International Council for the Exploration of the Sea
HOV Alvin
submarine-manned