http://lod.bco-dmo.org/id/dataset/765850
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
2019-04-29
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017
2019-06-26
publication
2019-06-26
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-06-26
publication
https://doi.org/10.1575/1912/bco-dmo.765850.2
Kenneth O. Buesseler
Woods Hole Oceanographic Institution
principalInvestigator
Margaret L. Estapa
Skidmore College
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: Buesseler, K., Estapa, M. (2019) TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2019-06-26 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.765850.2 [access date]
Dataset Description: <p>This dataset contains TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017.<br />
<br />
Related datasets collected during the same cruise:<br />
Water column Th-234 activities: https://www.bco-dmo.org/dataset/765859<br />
Sediment trap fluxes: https://www.bco-dmo.org/dataset/765835</p> Methods and Sampling: Samples were collected during two deployment cycles (termed “deployment 1” and “deployment 2”) occupied during the RRS Discovery cruise DY077 to the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) Site in April 2017 (Figure 1). In each of the cycles, we conducted particle flux sampling method intercomparisons between fluxes derived from upper water column deficits of 234Th vs. its parent isotope 238U, two types of neutrally buoyant sediment traps (NBST and PELAGRA), and a surface tethered array of sediment traps (STT). DY077 samples analyzed in US (WHOI and Skidmore College) are archived here; DY077 samples analyzed in the UK (NOC) are archived in the British Oceanographic Data Centre.
Two McLane in-situ battery powered pumps were deployed two times for the collection of size fractionated particles. The water passes first through a 51-micron screen followed by a nominal 1-micron quartz filter. Filter diameters are both 142 mm and a baffled opening developed for the GEOTRACES program keeps particles from washing off the top screen during retrieval of the pumps as they ascend on the wire. The pumps were programmed with a 1-hour delay time before turning on at depths of 200 and 350 m. After a pumping time of 2 hours, the pumps shut off and were retrieved. After retrieval, volumes were noted (measured by dual flow meters), any water that remained in the pump was drained through the filters, and the screen was rinsed with prefiltered seawater onto a 1-µm pore size silver filter (25-mm diameter).
The Ag filter and a 25-mm subsample from the QMA were dried at 45°C, mounted, and immediately counted for low-level β emission onboard the ship. At WHOI, a subset of samples was re-counted approximately one month later on shore. Final background counts to measure non-234Th related β emissions were conducted approximately six months later. At this point, filters were unmounted, re-dried, and gravimetrically subdivided into four sections. One half of the filter was analyzed for total carbon and nitrogen after high-temperature combustion on a Thermo Electron FlashEA 1112 C/N analyzer. Coulometric analysis for PIC after sample acidification was performed on a quarter of the filter (Johnson et al, 1985; Honjo et al, 2000). The remainder of the filter was archived.
Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49°N, 16.5°W).
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1659995 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1659995
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1660012 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1660012
completed
Kenneth O. Buesseler
Woods Hole Oceanographic Institution
508-289-2309
266 Woods Hole Road MS #25
Woods Hole
MA
02543
USA
kbuesseler@whoi.edu
pointOfContact
Margaret L. Estapa
Skidmore College
207-581-5176
193 Clarks Cove Road
Walpole
ME
04573
United States
margaret.estapa@maine.edu
pointOfContact
asNeeded
Dataset Version: 2
Unknown
deployment
station
depth
pore_size
lat
lon
date_start
time_start
date_end
time_end
ISO_DateTime_start
volume
TPN
TPN_err
TPC
TPC_err
PIC
PIC_err
POC
POC_err
Th234_part
Th234_part_err
Coulometer
Thermo Electron FlashEA 1112 C/N analyzer
Riso Beta Counter
theme
None, User defined
deployment number
station
depth
sample description
latitude
longitude
date_utc
time_utc
ISO_DateTime_UTC
Total Particulate Nitrogen
total particulate Carbon
particulate inorganic Carbon
particulate organic Carbon (POC)
thorium-234 activity
featureType
BCO-DMO Standard Parameters
CO2 Coulometer
Elemental Analyzer
McLane Pump
Riso Laboratory Anti-coincidence Beta Counter
instrument
BCO-DMO Standard Instruments
DY077
service
Deployment Activity
Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49N, 16.5W)
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: Are all traps created equal? A multi-method assessment of the collection and detection of sinking particles in the ocean
https://osprey.bco-dmo.org/project/762022
Collaborative Research: Are all traps created equal? A multi-method assessment of the collection and detection of sinking particles in the ocean
<p>NSF Award Abstract:</p>
<p>There is considerable need to understand the biological and ecological processes that through net primary production fix dissolved carbon dioxide (CO2) into organic matter in the upper ocean, and the processes that subsequently transport this organic carbon in to the ocean's interior. Most of the particulate organic carbon flux to the deep ocean is thought to be mediated by sinking particles. Ultimately it is the deep organic carbon transport and its sequestration that define the impact of ocean biota on atmospheric CO2 levels and hence climate. Currently, various methods are available to measure the amount of particles in the ocean that sink over a specified period of time commonly referred to as particle flux. Unfortunately, all of these methods are used independently of each other with very little intercomparison, leaving some uncertainty as to which approach provides the most accurate estimates. This study seeks to be the first concerted effort to standardize particle flux measurements. Seeking to keep the cost modest, the researchers are taking advantage of a collaboration with scientists in the United Kingdom to participate in an already scheduled research cruise. The proposed research will have much greater impact that merely standardization of particle flux measurements because it will provide the science and modeling community the ability to quantify the transfer of carbon throughout the surface ocean. Also, this project provides a variety of mentoring and training opportunities for students. A PhD student at Woods Hole Oceanographic Institute will get their first sea-going experience and will learn all of the processing steps for the study of an isotope of thorium (234Th). Skidmore College will have an undergraduate participant in the research and the results from the cruise will also be an excellent additional component for undergraduate oceanography classes.</p>
<p>Researchers from Woods Hole Oceanographic Institution and Skidmore College, in collaboration with a scientist from the National Oceanography Centre, Southampton will inter-compare direct, tracer, and optical-sensor methods used to determine sinking particle fluxes in the surface ocean. To do this, they will firstly conduct a comparison of two types of neutrally buoyant traps and one surface-tethered, drifting array. Secondly, measured trap fluxes will be compared to predicted 234Th fluxes from a 3D time-series of data. Lastly, optical sediment trap measurements will be compared to particle size distributions in the water column and gel traps, as well as size-fractionated particles on filters from large volume pumps. With this research, global ocean models, particularly carbon, will have greater accuracy and stronger conclusions will be able to be drawn from them.</p>
Are Traps Equal
largerWorkCitation
project
eng; USA
oceans
Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49N, 16.5W)
-16.5907
-16.4953
48.8656
48.9835
2017-04-19
2017-04-26
Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49°N, 16.5°W)
0
BCO-DMO catalogue of parameters from TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017
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/766304.rdf
Name: deployment
Units: unitless
Description: <p>deployment cycle during cruise DY077</p>
http://lod.bco-dmo.org/id/dataset-parameter/766305.rdf
Name: station
Units: unitless
Description: <p>station occupied during cruise DY077</p>
http://lod.bco-dmo.org/id/dataset-parameter/766306.rdf
Name: depth
Units: meters (m)
Description: <p>depth of water sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/766307.rdf
Name: pore_size
Units: micrometers (um)
Description: <p>nominal pore size of filter used to collect particles</p>
http://lod.bco-dmo.org/id/dataset-parameter/766308.rdf
Name: lat
Units: decimal degrees (DD)
Description: <p>latitude of in-situ pump deployment</p>
http://lod.bco-dmo.org/id/dataset-parameter/766309.rdf
Name: lon
Units: decimal degrees (DD)
Description: <p>longitude of in-situ pump deployment</p>
http://lod.bco-dmo.org/id/dataset-parameter/766310.rdf
Name: date_start
Units: unitless
Description: <p>date sample collection began (GMT) in ISO 8601 format yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/766311.rdf
Name: time_start
Units: unitless
Description: <p>time sample collection began (GMT) in ISO 8601 format hh:mm:ss</p>
http://lod.bco-dmo.org/id/dataset-parameter/766312.rdf
Name: date_end
Units: unitless
Description: <p>date sample collection ended (GMT) in ISO 8601 format yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/766313.rdf
Name: time_end
Units: unitless
Description: <p>time sample collection ended (GMT) in ISO 8601 format hh:mm:ss</p>
http://lod.bco-dmo.org/id/dataset-parameter/766314.rdf
Name: ISO_DateTime_start
Units: unitless
Description: <p>Date time sampling began (GMT) in format yyyy-mm-ddTHH:MMZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/766315.rdf
Name: volume
Units: liters (L)
Description: <p>water volume filtered by in-situ pump</p>
http://lod.bco-dmo.org/id/dataset-parameter/766316.rdf
Name: TPN
Units: micromoles per liter (umol/L)
Description: <p>total particulate nitrogen concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/766317.rdf
Name: TPN_err
Units: micromoles per liter (umol/L)
Description: <p>total particulate nitrogen uncertainty. For <51-µm particles, determined as 3 x SD of typical QMA dip blanks, scaled by the volume filtered and fraction of the filter area analyzed. See note in Processing Description regarding QMA punch-to-punch variability. Total particulate nitrogen uncertainty for >51-µm particles is unavailable because blanks were below the analytical detection limit.</p>
http://lod.bco-dmo.org/id/dataset-parameter/766318.rdf
Name: TPC
Units: micromoles per liter (umol/L)
Description: <p>total particulate carbon concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/766319.rdf
Name: TPC_err
Units: micromoles per liter (umol/L)
Description: <p>total particulate carbon uncertainty, determined as 3 x SD of blanks, scaled by the volume filtered and fraction of the filter area analyzed. See note in Processing Description regarding QMA punch-to-punch variability.</p>
http://lod.bco-dmo.org/id/dataset-parameter/766320.rdf
Name: PIC
Units: micrograms per liter (ug/L)
Description: <p>total particulate inorganic carbon concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/766321.rdf
Name: PIC_err
Units: micrograms per liter (ug/L)
Description: <p>total particulate inorganic carbon uncertainty, determined as 3 x SD of blanks, scaled by the volume filtered and fraction of the filter area analyzed. See note in Processing Description regarding QMA punch-to-punch variability.</p>
http://lod.bco-dmo.org/id/dataset-parameter/766322.rdf
Name: POC
Units: micromoles per liter (umol/L)
Description: <p>total particulate organic carbon concentration, computed as the difference between TPC and PIC</p>
http://lod.bco-dmo.org/id/dataset-parameter/766323.rdf
Name: POC_err
Units: micromoles per liter (umol/L)
Description: <p>total particulate organic carbon uncertainty, POC_err = (TPC_err2 + PIC_err2)1/2. See note in Processing Description regarding QMA punch-to-punch variability.</p>
http://lod.bco-dmo.org/id/dataset-parameter/766324.rdf
Name: Th234_part
Units: disintegration per minute per liter (dpm/L)
Description: <p>particulate thorium-234 activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/766325.rdf
Name: Th234_part_err
Units: disintegration per minute per liter (dpm/L)
Description: <p>particulate thorium-234 uncertainty, propagated from counting statistics. See note in Processing Description regarding QMA punch-to-punch variability.</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
1370
https://darchive.mblwhoilibrary.org/bitstream/1912/24289/1/dataset-765850_situ-pump-data__v2.tsv
download
https://doi.org/10.1575/1912/bco-dmo.765850.2
download
onLine
dataset
Samples were collected during two deployment cycles (termed “deployment 1” and “deployment 2”) occupied during the RRS Discovery cruise DY077 to the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) Site in April 2017 (Figure 1). In each of the cycles, we conducted particle flux sampling method intercomparisons between fluxes derived from upper water column deficits of 234Th vs. its parent isotope 238U, two types of neutrally buoyant sediment traps (NBST and PELAGRA), and a surface tethered array of sediment traps (STT). DY077 samples analyzed in US (WHOI and Skidmore College) are archived here; DY077 samples analyzed in the UK (NOC) are archived in the British Oceanographic Data Centre.
Two McLane in-situ battery powered pumps were deployed two times for the collection of size fractionated particles. The water passes first through a 51-micron screen followed by a nominal 1-micron quartz filter. Filter diameters are both 142 mm and a baffled opening developed for the GEOTRACES program keeps particles from washing off the top screen during retrieval of the pumps as they ascend on the wire. The pumps were programmed with a 1-hour delay time before turning on at depths of 200 and 350 m. After a pumping time of 2 hours, the pumps shut off and were retrieved. After retrieval, volumes were noted (measured by dual flow meters), any water that remained in the pump was drained through the filters, and the screen was rinsed with prefiltered seawater onto a 1-µm pore size silver filter (25-mm diameter).
The Ag filter and a 25-mm subsample from the QMA were dried at 45°C, mounted, and immediately counted for low-level β emission onboard the ship. At WHOI, a subset of samples was re-counted approximately one month later on shore. Final background counts to measure non-234Th related β emissions were conducted approximately six months later. At this point, filters were unmounted, re-dried, and gravimetrically subdivided into four sections. One half of the filter was analyzed for total carbon and nitrogen after high-temperature combustion on a Thermo Electron FlashEA 1112 C/N analyzer. Coulometric analysis for PIC after sample acidification was performed on a quarter of the filter (Johnson et al, 1985; Honjo et al, 2000). The remainder of the filter was archived.
Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49°N, 16.5°W).
Specified by the Principal Investigator(s)
Per-filter blank values were subtracted before calculating TPN, TPC, and PIC concentrations. 234Th blank values are reported for reference but were not subtracted. Reported uncertainties for measurements made using 25-mm QMA subsamples are propagated from counting statistics for 234Th and the standard deviation of blank analyses for C and N. Users should note that 10% relative uncertainty may exist due to punch-to-punch variability (Maiti et al. 2012). The reported analytical uncertainties should be used for ratios computed from a common filter punch. An additional 10% relative uncertainty should be applied to absolute concentrations.
BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.
* added ISO_DateTime_start column from date and time columns
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
Coulometer
Coulometer
PI Supplied Instrument Name: Coulometer Instrument Name: CO2 Coulometer Instrument Short Name:CO2 coulometer Instrument Description: A CO2 coulometer semi-automatically controls the sample handling and extraction of CO2 from seawater samples. Samples are acidified and the CO2 gas is bubbled into a titration cell where CO2 is converted to hydroxyethylcarbonic acid which is then automatically titrated with a coulometrically-generated base to a colorimetric endpoint. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB12
Thermo Electron FlashEA 1112 C/N analyzer
Thermo Electron FlashEA 1112 C/N analyzer
PI Supplied Instrument Name: Thermo Electron FlashEA 1112 C/N analyzer 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/
PI Supplied Instrument Name: Instrument Name: McLane Pump Instrument Short Name:McLane Pump Instrument Description: McLane pumps sample large volumes of seawater at depth. They are attached to a wire and lowered to different depths in the ocean. As the water is pumped through the filter, particles suspended in the ocean are collected on the filters. The pumps are then retrieved and the contents of the filters are analyzed in a lab.
Riso Beta Counter
Riso Beta Counter
PI Supplied Instrument Name: Riso Beta Counter Instrument Name: Riso Laboratory Anti-coincidence Beta Counter Instrument Short Name:Riso Beta Counter Instrument Description: Low-level beta detectors manufactured by Riso (now Nutech) in Denmark. These instruments accept samples that can be mounted on a 25mm filter holder. These detectors have very low backgrounds, 0.17 counts per minute, and can have counting efficiencies as high as 55%.
Typically used in laboratory analyses. Designed to measure low levels of beta particle emission. The systems work on the principle of anticoincidence.
Cruise: DY077
DY077
Community Standard Description
International Council for the Exploration of the Sea
RRS Discovery
vessel
DY077
Dr Richard Lampitt
University of Southampton
Community Standard Description
International Council for the Exploration of the Sea
RRS Discovery
vessel