http://lod.bco-dmo.org/id/dataset/881459
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
2022-09-27
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Total water column Thorium-234 measurements collected during the 2012-2013 Palmer Field Season (WAP Carbon export project)
2022-08-02
publication
2022-08-02
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2024-09-23
publication
https://doi.org/10.26008/1912/bco-dmo.881459.1
Michael R. Stukel
Florida State University EOAS
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: Stukel, M. (2024) Total water column Thorium-234 measurements collected during the 2012-2013 Palmer Field Season (WAP Carbon export project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2022-08-02 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.881459.1 [access date]
Total water column 234Th during the 2012-2013 Palmer Field Season Dataset Description: Methods and Sampling: <p>Salinity and density were measured using a CTD.&nbsp; 4-L Samples for total water-column <sup>234</sup>Th activity were collected using Go-Flo bottles at 7 depths from the surface to 100 m.&nbsp; Sample volume was determined gravimetrically and then samples were acidified to a pH &lt; 2 with nitric acid and a Th-230 tracer spike was added.&nbsp; Samples were shaken and allowed to equilibrate for 4 – 9 hours.&nbsp; Samples were then re-basified with ammonium hydroxide to a pH of 8 – 9, shaken, and allowed to equilibrate for &gt;8 hours.&nbsp; Samples were then vacuum filtered at high vacuum pressure through a quartz (QMA) filter.&nbsp; Filters were mounted in RISO planchets and counted on a RISO low-level beta multi-counter at Palmer Station.&nbsp; Following a background count &gt;6 months later, samples were dissolved in 8M nitric acid / 10% hydrogen peroxide solution and a Th-229 tracer spike was added.&nbsp; Samples were then shipped to the Woods Hole Analytical laboratory for analysis of the Th-229:Th-230 ratio, which was used to calculate the initial precipitation and filtration yield of Th-234. For additional details, see Stukel et al. (2015) and Stukel et al. (2022).&nbsp;</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1756610 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1756610
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1951090 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1951090
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1340886 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1340886
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1440435 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1440435
completed
Michael R. Stukel
Florida State University EOAS
815-258-3875
Earth, Ocean, and Atmos. Science Building (EOA) Rm. 6089 1011 Academic Way
Tallahassee
FL
32306
USA
mstukel@fsu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station
Latitude
Longitude
Collection_Date_and_Time
Depth
Salinity
Density
Th234
Uncertainty
Deficiency
Def_Uncertainty
Riso low-level GM beta multi-counter
theme
None, User defined
station
latitude
longitude
date
depth
salinity
density
thorium-234 activity
radioactive isotope conc error
featureType
BCO-DMO Standard Parameters
GM multicounter
instrument
BCO-DMO Standard Instruments
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.
Quantifying Processes Driving Interannual Variability in the Biological Carbon Pump in the Western Antarctic Peninsula
https://osprey.bco-dmo.org/project/838048
Quantifying Processes Driving Interannual Variability in the Biological Carbon Pump in the Western Antarctic Peninsula
<p><em>NSF Award Abstract:</em><br />
Algae in the surface ocean convert carbon dioxide into organic carbon through photosynthesis. The biological carbon pump transports this organic carbon from the atmosphere to the deep ocean where it can be stored for tens to hundreds of years. Annually, the amount transported is similar to that humans are currently emitting by burning fossil fuels. However, at present we cannot predict how this important process will change with a warming ocean. These investigators plan to develop a 15+ year time-series of vertical carbon transfer for the Western Antarctic Peninsula; a highly productive Antarctic ecosystem. This region is also rapid transition to warmer temperatures leading to reduced sea ice coverage. This work will help researchers better understand how the carbon cycle in the Western Antarctic Peninsula will respond to climate change. The researchers will develop the first large-scale time-series of carbon flux anywhere in the ocean. This research will also support the education and training of a graduate student and support the integration of concepts in Antarctic research into two undergraduate courses designed for non-science majors and advanced earth science students. The researchers will also develop educational modules for introducing elementary and middle-school age students to important concepts such as gross and net primary productivity, feedbacks in the marine and atmospheric systems, and the differences between correlation and causation. Results from this proposal will also be incorporated into a children’s book, “Plankton do the Strangest Things”, that is targeted at 5-7 year olds and is designed to introduce them to the incredible diversity and fascinating adaptations of microscopic marine organisms.</p>
<p>This research seeks to leverage 6 years (2015-2020) of 234Th samples collected on Palmer LTER program, 5 years of prior measurements (2009-2010, 2012-2014), and upcoming cruises (2021-2023) to develop a time-series of summertime particle flux in the WAP that stretches for 15 years. The 238U-234Th disequilibrium approach utilizes changes in the activity of the particle-active radio-isotope 234Th relative to its parent nuclide 238U to quantify the flux of sinking carbon out of the surface ocean (over a time-scale of ~one month). This proposal will fund 234Th analyses from nine years’ worth of cruises (2015-2023) and extensive analyses designed to investigate the processes driving inter-annual variability in the BCP. These include: 1) physical modeling to quantify the importance of advection and diffusion in the 234Th budget, 2) time-series analyses of particle flux, and 3) statistical modeling of the relationships between particle flux and multiple presumed drivers (biological, chemical, physical, and climate indices) measured by collaborators in the Palmer LTER program. This multi-faceted approach is critical for linking the measurements to models and for predicting responses to climate change. It will also test the hypothesis that export flux is decreasing in the northern WAP, increasing in the southern WAP, and increasing when integrated over the entire region as a result of earlier sea ice retreat and a larger ice-free zone. The project will also investigate relationships between carbon export and multiple potentially controlling factors including: primary productivity, algal biomass and taxonomic composition, biological oxygen saturation, zooplankton biomass and taxonomic composition, bacterial production, temperature, wintertime sea ice extent, date of sea ice retreat, and climate modes.</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>
WAP Carbon export
largerWorkCitation
project
eng; USA
oceans
-64.0725
-64.0405
-64.815
-64.7795
2012-10-31
2013-03-25
Western Antarctic Peninsula (Palmer LTER Study Region)
0
BCO-DMO catalogue of parameters from Total water column Thorium-234 measurements collected during the 2012-2013 Palmer Field Season (WAP Carbon export 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/936625.rdf
Name: Station
Units: unitless
Description: <p>Palmer LTER station name from which sample was collected.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936626.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Station Latitude in decimal degrees; a positive value indicates a Northern coordinate.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936627.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Station Longitude in decimal degrees; a positive value indicates an Eastern coordinate.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936628.rdf
Name: Collection_Date_and_Time
Units: unitless
Description: <p>Date and time of collection.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936629.rdf
Name: Depth
Units: meter (m)
Description: <p>Depth at which sample was collected.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936630.rdf
Name: Salinity
Units: PSU
Description: <p>Salinity.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936631.rdf
Name: Density
Units: kilogram per liter (kg/L^-1)
Description: <p>Density.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936632.rdf
Name: Th234
Units: decays per minute per liter (dpm/L^-1)
Description: <p>Total water-column Thorium isotope 234Th.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936633.rdf
Name: Uncertainty
Units: decays per minute per liter (dpm/L^-1)
Description: <p>Uncertainty in thorium isotope 234Th.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936634.rdf
Name: Deficiency
Units: decays per minute per liter (dpm/L^-1)
Description: <p>238Uranium-234Thorium deficiency.</p>
http://lod.bco-dmo.org/id/dataset-parameter/936635.rdf
Name: Def_Uncertainty
Units: decays per minute per liter (dpm/L^-1)
Description: <p>Uncertainty in deficiency.</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
27167
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/2f157197-af52-4cd8-81d2-3e0a59b6f044/content
download
https://doi.org/10.26008/1912/bco-dmo.881459.1
download
onLine
dataset
<p>Salinity and density were measured using a CTD.&nbsp; 4-L Samples for total water-column <sup>234</sup>Th activity were collected using Go-Flo bottles at 7 depths from the surface to 100 m.&nbsp; Sample volume was determined gravimetrically and then samples were acidified to a pH &lt; 2 with nitric acid and a Th-230 tracer spike was added.&nbsp; Samples were shaken and allowed to equilibrate for 4 – 9 hours.&nbsp; Samples were then re-basified with ammonium hydroxide to a pH of 8 – 9, shaken, and allowed to equilibrate for &gt;8 hours.&nbsp; Samples were then vacuum filtered at high vacuum pressure through a quartz (QMA) filter.&nbsp; Filters were mounted in RISO planchets and counted on a RISO low-level beta multi-counter at Palmer Station.&nbsp; Following a background count &gt;6 months later, samples were dissolved in 8M nitric acid / 10% hydrogen peroxide solution and a Th-229 tracer spike was added.&nbsp; Samples were then shipped to the Woods Hole Analytical laboratory for analysis of the Th-229:Th-230 ratio, which was used to calculate the initial precipitation and filtration yield of Th-234. For additional details, see Stukel et al. (2015) and Stukel et al. (2022).&nbsp;</p>
Specified by the Principal Investigator(s)
- Spaces removed from column names and replaced with underscores ("_")
- Row containing units removed from the data file
- 'NaN' values in the data file were replaced with blank values ("")
- Collection_Date date format converted from %m-%d-%y to %Y-%m-%d
- Date format converted from local time at Palmer Station (UTC-3) to UTC
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
Riso low-level GM beta multi-counter
Riso low-level GM beta multi-counter
PI Supplied Instrument Name: Riso low-level GM beta multi-counter PI Supplied Instrument Description:Samples were then vacuum filtered at high vacuum pressure through a quartz (QMA) filter. Filters were mounted in RISO planchets and counted on a RISO low-level beta multi-counter at Palmer Station. Instrument Name: GM multicounter Instrument Short Name: Instrument Description: A gas flow multicounter (GM multicounter) is used for counting low-level beta doses. GM multicounters can be used for gas proportional counting of 32Si to 32P. For more information about GM multicounter usage see Krause et. al. 2011.