http://lod.bco-dmo.org/id/dataset/959033
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
2025-04-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022
2025-09-03
publication
2025-09-03
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2025-12-05
publication
https://doi.org/10.26008/1912/bco-dmo.959033.1
Martial Taillefert
Georgia Institute of Technology
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: Taillefert, M. (2025) Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-09-03 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.959033.1 [access date]
nGoM benthic chamber between July 2021 and July 2022 Dataset Description: Methods and Sampling: <p>Benthic chamber samples were collected using two in situ benthic landers configured similarly, one tethered to the surface for shelf measurements (&lt; 100 meters (m)) adapted from a previously developed platform (Tercier-Waeber and Taillefert, 2008; Meiggs et al., 2011), the other is a modified version of the free Benthic Experiment Chamber Instrument (BECI) developed for deep-sea measurements (Jahnke and Christensen, 1989). Both landers are autonomous and programmed before deployment. They carry a single benthic chamber, two sampling racks holding 50-milliliter (ml) polypropylene syringes for the injection of a chemical tracer and the sampling of up to 18 samples (Jahnke and Christensen, 1989). The shelf lander chamber is gently mixed using a SBEST Seabird pump, whereas the deep-sea chamber is mixed mechanically at slow speed (5-10 rpm). The benthic chambers are closed using hydraulically-controlled actuators after a settling period of 20 minutes on the seafloor. A chemical tracer is injected 10 minutes after the lid is closed, and the first sample is collected 2 minutes after tracer injection to determine the volume of the overlying waters in the benthic chamber (Rao and Jahnke, 2004). Samples are then collected with different frequencies depending on the time of deployment (ranging from 60 minutes on the shelf to 115 minutes for deep-sea measurements). Both landers were recovered within an hour after the last benthic chamber sample was collected. The benthic water samples were then filtered within an hour after lander recovery onto 0.22-micrometer (µm) Whatman 25-millimeter (mm) Acrodisc syringe filters (PES membrane) and either preserved until analysis or analyzed immediately onboard ship. Samples were preserved at 4 degrees Celsius (C) after acidification (Ca<sub>d</sub>, Mn<sub>d</sub>) or addition of HgCl<sub>2</sub> (δ<sup>13</sup>C-DIC, TA), preserved at -20 degrees C (NH<sub>4</sub><sup>+</sup>,<sup> </sup>NO<sub>3</sub><sup>-</sup>, Br<sup>-</sup>), or dispensed directly into reagents for analysis (SPO<sub>4</sub><sup>3-</sup>). Sealed borosilicate glass vials were used for TA, DIC, and δ<sup>13</sup>C-DIC as recommended (Dickson et al., 2007; Wang et al., 2018).</p>
<p>NH<sub>4</sub><sup>+</sup> was measured spectrophotometrically by the indophenol blue method (Strickland and Parsons, 1972), SPO<sub>4</sub><sup>3-</sup> was measured spectrophotometrically using the molybdate-blue method after natural color correction to avoid interferences from dissolved silica and sulfides (Murphy and Riley, 1962). DIC and TA were measured by acid titration in a closed cell with continuous pH measurements (Dickson et al., 2007; Rassmann et al., 2016), except in July 2022 when DIC and TA were measured by cavity ring-down spectrometry (CRDS, Picarro G2131-i) with an automatic CO<sub>2</sub> extraction system (Apollo SciTech AS-D1) and open-cell potentiometric titrations, respectively (Ferreira et al., 2025). δ<sup>13</sup>C-DIC was measured using an isotope ratio mass spectrometer with a high-performance liquid chromatography preparation module for gas samples (Brandes, 2009; Wang et al., 2018). NO<sub>3</sub><sup>-</sup> and Br<sup>-</sup> were measured by high-performance liquid chromatography (HPLC) using a matrix elimination method developed for seawater samples without dilution (Beckler et al., 2014). Finally, Ca<sub>d</sub> and Mn<sub>d</sub> were measured by ICP-MS with collision cell to prevent argon interferences.</p>
<p>Internal standards were used to correct for the drift of the instrument, and quality control blanks, standard checks, and certified seawater references were run several times during each run to control accuracy and reproducibility. All calibrations were conducted with at least five standards prepared in a 0.54 M NaCl matrix before each series of measurements. Blanks and quality control checks were run routinely during each analysis. Finally, calibration sensitivities were compared routinely to ensure the accuracy of the methods. For DIC analyses, Dickson DIC-certified seawater samples were run routinely during analyses to validate the accuracy of the method. Errors of all reported concentrations represent the analytical error propagated from calibration curves, dilution, and instrumental drift.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1948914 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1948914
completed
Martial Taillefert
Georgia Institute of Technology
404-894-6043
School of Earth and Atmospheric Sciences 311 Ferst Dr. NE
Atlanta
GA
30332
USA
mtaillef@eas.gatech.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Date
Year
Month
Day
Cruise_ID
Collection_Type
Station
Lon
Lat
sample_ID
Time_h
DIC_mM
sdDIC_mM
PO4_uM
sdPO4_uM
NH4_uM
sdNH4_uM
TA_mM
sdTA_mM
d13C_DIC_permille
sdd13C_DIC_permille
Mnd_uM
sdMnd_uM
Cad_mM
sdCad_mM
NO3_uM
sdNO3_uM
ExBr_mM
sdExBr_mM
benthic chamber
benthic lander
cavity ring-down spectrometry
HPLC
Agilent 7900e ICP-MS
Thermo Electron SurveyorLite autosampler
Waters 2707 Autosampler
SPS4 Autosampler.
Beckman Coulter DU 720 UV-vis
Thermo Scientific Delta V plus
Metrohm 877 Titrino Plus
theme
None, User defined
date
year
month of year
day of month
Cruise identfier
sample description
station
latitude
longitude
sample identification
time_elapsed
dissolved inorganic Carbon
reactive phosphorus (PO4)
Ammonium
total alkalinity (TA)
13C to 12C ratio in DIC
Manganese
Calcium
Nitrate
bromides
featureType
BCO-DMO Standard Parameters
benthic incubation chamber
benthic lander
Cavity enhanced absorption spectrometers
High-Performance Liquid Chromatograph
Inductively Coupled Plasma Mass Spectrometer
Laboratory Autosampler
Laboratory Autosampler
Laboratory Autosampler
Spectrophotometer
Thermo Fisher Scientific DELTA V Plus isotope ratio mass spectrometer
Titrator
instrument
BCO-DMO Standard Instruments
SAV-21-24
SAV-21-15
SAV-22-06
SAV-22-11
service
Deployment Activity
Louisiana Shelf, Northern Gulf of Mexico
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.
Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins
https://osprey.bco-dmo.org/project/894879
Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins
<p><em><strong>NSF Award Abstract</strong></em><br />
Ocean acidification is the process that lowers the pH of the ocean over time due to uptake of atmospheric carbon dioxide. This project investigates how chemical reactions in marine sediments exposed to high riverine sediment loads influence ocean acidification in coastal waters. Although we know that ocean acidification affects marine life and commercial fisheries in coastal waters, little is known about how acidification processes in the water column are influenced by reactions occurring in sediments on the sea floor. The role of large sediment deposits from rivers in these processes has also never been investigated. This study will be conducted in the Mississippi River and Gulf of Mexico. The Mississippi River transports a high sediment load to the continental shelf in the Gulf of Mexico and plays an important role in the economy of the southern coast of the United States. Results from this study will be useful to the oceanographic community for increasing understanding of ocean acidification processes in delta and shelf environments. It will also benefit decision makers interested in predicting the role of sediments on the nutrient -rich Louisiana shelf for discharge control purposes. This project also has an important educational component by training undergraduate, graduate, and postdoctoral students, providing experiences at sea for undergraduates, and conducting outreach activities with K-12 students.</p>
<p>The geochemical and microbiological processes responsible for the transformation of particles deposited on the seafloor will be characterized near the Mississippi River mouth and along the nearby continental slope. The release of acids (CO2) and bases (alkalinity) from the sediment will be quantified using autonomous instruments deployed on the seafloor to determine whether sediments contribute to the acidity of the surrounding water column or instead provide bases to buffer the water column from atmospheric CO2 inputs. As the Mississippi River discharge during the later Winter and Spring provides much more sediment to the coastal zone compared to the rest of the year, research cruises will be taken twice a year to determine how seasonal variations in riverine discharge affect the release of acids and bases into the water column. Mathematical models will then be used to predict the effect of seasonal variations on acids or bases release to the water column. This study will therefore provide a quantitative understanding of the role of large sediment depositions to the seafloor on sediment geochemical and microbiological processes and their feedback to the overlying waters. Simultaneously, a large data set will be generated and used to calibrate mathematical models and better characterize benthic-pelagic interactions. Such efforts are needed to predict how continental margins respond to constantly increasing stress from anthropogenic activities.</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>
NGoM Benthic Alk Flux
largerWorkCitation
project
eng; USA
oceans
Louisiana Shelf, Northern Gulf of Mexico
-91.33712
-88.60532
28.19917
28.94785
2021-07-15
2022-07-23
0
BCO-DMO catalogue of parameters from Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022
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/959180.rdf
Name: Date
Units: unitless
Description: <p>Date of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959181.rdf
Name: Year
Units: unitless
Description: <p>Year of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959182.rdf
Name: Month
Units: unitless
Description: <p>Month of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959183.rdf
Name: Day
Units: unitless
Description: <p>Day of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959184.rdf
Name: Cruise_ID
Units: unitless
Description: <p>Cruise ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/959185.rdf
Name: Collection_Type
Units: unitless
Description: <p>Description of sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/959186.rdf
Name: Station
Units: unitless
Description: <p>Station ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/959187.rdf
Name: Lon
Units: decimal degrees
Description: <p>Longitude of sample collection; negative values = West</p>
http://lod.bco-dmo.org/id/dataset-parameter/959188.rdf
Name: Lat
Units: decimal degrees
Description: <p>Latitude of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/959189.rdf
Name: sample_ID
Units: unitless
Description: <p>sample_ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/959190.rdf
Name: Time_h
Units: hours (h)
Description: <p>Incubation time in hours</p>
http://lod.bco-dmo.org/id/dataset-parameter/959191.rdf
Name: DIC_mM
Units: millimolar (mM)
Description: <p>Dissolved inorganic carbon (DIC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959192.rdf
Name: sdDIC_mM
Units: millimolar (mM)
Description: <p>Standard deviation of Dissolved inorganic carbon (DIC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959193.rdf
Name: PO4_uM
Units: micromolar (uM)
Description: <p>Orthophosphate (PO4)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959194.rdf
Name: sdPO4_uM
Units: micromolar (uM)
Description: <p>Standard deviation of Orthophosphate (PO4)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959195.rdf
Name: NH4_uM
Units: micromolar (uM)
Description: <p>Ammonium (NH4)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959196.rdf
Name: sdNH4_uM
Units: micromolar (uM)
Description: <p>Standard deviation of Ammonium (NH4)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959197.rdf
Name: TA_mM
Units: millimolar (mM)
Description: <p>Total alkalinity (TA)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959198.rdf
Name: sdTA_mM
Units: millimolar (mM)
Description: <p>Standard deviation of Total alkalinity (TA)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959199.rdf
Name: d13C_DIC_permille
Units: per mille
Description: <p>Carbon isotopic fractionation of DIC</p>
http://lod.bco-dmo.org/id/dataset-parameter/959200.rdf
Name: sdd13C_DIC_permille
Units: per mille
Description: <p>Standard deviation of Carbon isotopic fractionation of DIC</p>
http://lod.bco-dmo.org/id/dataset-parameter/959201.rdf
Name: Mnd_uM
Units: micromolar (uM)
Description: <p>Dissolved manganese (Mnd)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959202.rdf
Name: sdMnd_uM
Units: micromolar (uM)
Description: <p>Standard deviation of dissolved manganese (Mnd)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959203.rdf
Name: Cad_mM
Units: millimolar (mM)
Description: <p>Dissolved calcium (Cad)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959204.rdf
Name: sdCad_mM
Units: millimolar (mM)
Description: <p>Standard deviation of dissolved calcium (Cad)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959205.rdf
Name: NO3_uM
Units: micromolar (uM)
Description: <p>Nitrate (NO3)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959206.rdf
Name: sdNO3_uM
Units: micromolar (uM)
Description: <p>Standard deviation of nitrate (NO3)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959207.rdf
Name: ExBr_mM
Units: millimolar (mM)
Description: <p>Excess bromide (ExBr)</p>
http://lod.bco-dmo.org/id/dataset-parameter/959208.rdf
Name: sdExBr_mM
Units: millimolar (mM)
Description: <p>Standard deviation of excess bromide (ExBr)</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
https://doi.org/10.26008/1912/bco-dmo.959033.1
download
onLine
dataset
<p>Benthic chamber samples were collected using two in situ benthic landers configured similarly, one tethered to the surface for shelf measurements (&lt; 100 meters (m)) adapted from a previously developed platform (Tercier-Waeber and Taillefert, 2008; Meiggs et al., 2011), the other is a modified version of the free Benthic Experiment Chamber Instrument (BECI) developed for deep-sea measurements (Jahnke and Christensen, 1989). Both landers are autonomous and programmed before deployment. They carry a single benthic chamber, two sampling racks holding 50-milliliter (ml) polypropylene syringes for the injection of a chemical tracer and the sampling of up to 18 samples (Jahnke and Christensen, 1989). The shelf lander chamber is gently mixed using a SBEST Seabird pump, whereas the deep-sea chamber is mixed mechanically at slow speed (5-10 rpm). The benthic chambers are closed using hydraulically-controlled actuators after a settling period of 20 minutes on the seafloor. A chemical tracer is injected 10 minutes after the lid is closed, and the first sample is collected 2 minutes after tracer injection to determine the volume of the overlying waters in the benthic chamber (Rao and Jahnke, 2004). Samples are then collected with different frequencies depending on the time of deployment (ranging from 60 minutes on the shelf to 115 minutes for deep-sea measurements). Both landers were recovered within an hour after the last benthic chamber sample was collected. The benthic water samples were then filtered within an hour after lander recovery onto 0.22-micrometer (µm) Whatman 25-millimeter (mm) Acrodisc syringe filters (PES membrane) and either preserved until analysis or analyzed immediately onboard ship. Samples were preserved at 4 degrees Celsius (C) after acidification (Ca<sub>d</sub>, Mn<sub>d</sub>) or addition of HgCl<sub>2</sub> (δ<sup>13</sup>C-DIC, TA), preserved at -20 degrees C (NH<sub>4</sub><sup>+</sup>,<sup> </sup>NO<sub>3</sub><sup>-</sup>, Br<sup>-</sup>), or dispensed directly into reagents for analysis (SPO<sub>4</sub><sup>3-</sup>). Sealed borosilicate glass vials were used for TA, DIC, and δ<sup>13</sup>C-DIC as recommended (Dickson et al., 2007; Wang et al., 2018).</p>
<p>NH<sub>4</sub><sup>+</sup> was measured spectrophotometrically by the indophenol blue method (Strickland and Parsons, 1972), SPO<sub>4</sub><sup>3-</sup> was measured spectrophotometrically using the molybdate-blue method after natural color correction to avoid interferences from dissolved silica and sulfides (Murphy and Riley, 1962). DIC and TA were measured by acid titration in a closed cell with continuous pH measurements (Dickson et al., 2007; Rassmann et al., 2016), except in July 2022 when DIC and TA were measured by cavity ring-down spectrometry (CRDS, Picarro G2131-i) with an automatic CO<sub>2</sub> extraction system (Apollo SciTech AS-D1) and open-cell potentiometric titrations, respectively (Ferreira et al., 2025). δ<sup>13</sup>C-DIC was measured using an isotope ratio mass spectrometer with a high-performance liquid chromatography preparation module for gas samples (Brandes, 2009; Wang et al., 2018). NO<sub>3</sub><sup>-</sup> and Br<sup>-</sup> were measured by high-performance liquid chromatography (HPLC) using a matrix elimination method developed for seawater samples without dilution (Beckler et al., 2014). Finally, Ca<sub>d</sub> and Mn<sub>d</sub> were measured by ICP-MS with collision cell to prevent argon interferences.</p>
<p>Internal standards were used to correct for the drift of the instrument, and quality control blanks, standard checks, and certified seawater references were run several times during each run to control accuracy and reproducibility. All calibrations were conducted with at least five standards prepared in a 0.54 M NaCl matrix before each series of measurements. Blanks and quality control checks were run routinely during each analysis. Finally, calibration sensitivities were compared routinely to ensure the accuracy of the methods. For DIC analyses, Dickson DIC-certified seawater samples were run routinely during analyses to validate the accuracy of the method. Errors of all reported concentrations represent the analytical error propagated from calibration curves, dilution, and instrumental drift.</p>
Specified by the Principal Investigator(s)
<p>Spectrophotometric measurements were recorded on paper forms specifically designed for each analysis and digitized to process the data. DIC, TA, δ<sup>13</sup>C-DIC, HPLC, and ICP-MS data were acquired by computers. DIC and TA concentrations were determined by non-linear least squares fitting of the DIC and total alkalinity equations in seawater to the titration data (Magette et al., 2025). NO<sub>3</sub><sup>-</sup>, and Br<sup>-</sup> chromatographic data were integrated using a Matlab-based software developed in-house (Bristow and Taillefert, 2008). TA, δ<sup>13</sup>C-DIC, and ICP-MS data were processed through Excel macro spreadsheet routines developed for each of these analyses.</p>
Specified by the Principal Investigator(s)
- Imported the four original files into the BCO-DMO system (original file names: GOM_Summer2021_BenthicChamberData_BCO-DMO.xlsx, GOM_Fall2021_BenthicChamberData_BCO-DMO.xlsx, GOM_Spring2022_BenthicChamberData_BCO-DMO.xlsx, GOM_Summer2022_BenthicChamberData_BCO-DMO.xlsx)
- Flagged "nd", "#N/A", and "--" as missing data values; missing data are empty/blank in the final CSV file.
- Concatenated the four data files into a single data file.
- Added column for the cruise ID.
- Created Date field in YYYY-MM-DD format.
- Renamed fields to comply with BCO-DMO naming conventions.
- Rounded the Time_h column to 2 decimal places.
- Saved the final file as "959033_v1_nGoM_benthic_chamber_2021-2022.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
benthic chamber
benthic chamber
PI Supplied Instrument Name: benthic chamber PI Supplied Instrument Description:Benthic chamber samples were collected with a benthic lander and sampling racks designed and fabricated at Georgia Tech. Instrument Name: benthic incubation chamber Instrument Short Name: Instrument Description: A device that isolates a portion of seabed plus overlying water from its surroundings. Either returns the entire system to the surface or incorporates sampling devices and/or in-situ sensors.
benthic lander
benthic lander
PI Supplied Instrument Name: benthic lander PI Supplied Instrument Description:Benthic chamber samples were collected with a benthic lander and sampling racks designed and fabricated at Georgia Tech. Electronic equipment controlling the autonomous benthic lander sample collection was designed and developed by Analytical Instrument Systems, Inc. in collaboration with the Georgia Tech group. The shelf lander included a SBEST Seabird pump to mix the overlying waters, whereas the deep-sea lander carried a mechanical stirrer designed and fabricated by Georgia Tech. Instrument Name: benthic lander Instrument Short Name: Instrument Description: A benthic lander is an autonomous research platform used in marine research to take measurements directly on the seafloor. Benthic landers are carrier systems to which different measuring and sampling devices can be attached. They transport these devices to the seafloor and back up again. Autonomous means that the lander is not connected to the ship via a cable. It can thus work independently on the seafloor for a long period of time.
cavity ring-down spectrometry
cavity ring-down spectrometry
PI Supplied Instrument Name: cavity ring-down spectrometry PI Supplied Instrument Description:DIC was measured by cavity ring-down spectrometry with a Picarro G2131-i and an Apollo SciTech AS-D1 automatic CO2 extraction system. Instrument Name: Cavity enhanced absorption spectrometers Instrument Short Name:CEAS Instrument Description: Instruments that illuminate a sample inside an optical cavity, typically using laser light, and measure the concentration or amount of a species in gas phase by absorption spectroscopy. Techniques include cavity ring-down spectroscopy (CRDS) and integrated cavity output spectroscopy (ICOS).
HPLC
HPLC
PI Supplied Instrument Name: HPLC PI Supplied Instrument Description:HPLC measurements were conducted with a Waters 1525 binary pump with degasser, coupled to a Waters 2487 dual absorbance detector, and Waters 2707 Autosampler. Instrument Name: High-Performance Liquid Chromatograph Instrument Short Name:HPLC Instrument Description: A High-performance liquid chromatograph (HPLC) is a type of liquid chromatography used to separate compounds that are dissolved in solution. HPLC instruments consist of a reservoir of the mobile phase, a pump, an injector, a separation column, and a detector. Compounds are separated by high pressure pumping of the sample mixture onto a column packed with microspheres coated with the stationary phase. The different components in the mixture pass through the column at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB11/
Agilent 7900e ICP-MS
Agilent 7900e ICP-MS
PI Supplied Instrument Name: Agilent 7900e ICP-MS PI Supplied Instrument Description:Cad and Mnd measurements were conducted with an Agilent 7900e ICP-MS with SPS4 Autosampler. Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
Thermo Electron SurveyorLite autosampler
Thermo Electron SurveyorLite autosampler
PI Supplied Instrument Name: Thermo Electron SurveyorLite autosampler PI Supplied Instrument Description:δ13C-DIC measurements were conducted with a Thermo Electron SurveyorLite autosampler, a Surveyor MS HPLC pump, and an LC Isolink interface coupled to a Thermo Scientific Delta V plus stable isotope mass spectrometer. Instrument Name: Laboratory Autosampler Instrument Short Name: Instrument Description: Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.
Waters 2707 Autosampler
Waters 2707 Autosampler
PI Supplied Instrument Name: Waters 2707 Autosampler PI Supplied Instrument Description:HPLC measurements were conducted with a Waters 1525 binary pump with degasser, coupled to a Waters 2487 dual absorbance detector, and Waters 2707 Autosampler. Instrument Name: Laboratory Autosampler Instrument Short Name: Instrument Description: Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.
SPS4 Autosampler.
SPS4 Autosampler.
PI Supplied Instrument Name: SPS4 Autosampler. PI Supplied Instrument Description:Cad and Mnd measurements were conducted with an Agilent 7900e ICP-MS with SPS4 Autosampler. Instrument Name: Laboratory Autosampler Instrument Short Name: Instrument Description: Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.
Beckman Coulter DU 720 UV-vis
Beckman Coulter DU 720 UV-vis
PI Supplied Instrument Name: Beckman Coulter DU 720 UV-vis PI Supplied Instrument Description:All spectrophotometric measurements were conducted with a Beckman Coulter DU 720 UV-vis spectrophotometer. Instrument Name: Spectrophotometer Instrument Short Name:Spectrophotometer Instrument Description: An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/
Thermo Scientific Delta V plus
Thermo Scientific Delta V plus
PI Supplied Instrument Name: Thermo Scientific Delta V plus PI Supplied Instrument Description:δ13C-DIC measurements were conducted with a Thermo Electron SurveyorLite autosampler, a Surveyor MS HPLC pump, and an LC Isolink interface coupled to a Thermo Scientific Delta V plus stable isotope mass spectrometer. Instrument Name: Thermo Fisher Scientific DELTA V Plus isotope ratio mass spectrometer Instrument Short Name:Delta V Plus IRMS Instrument Description: The Thermo Scientific DELTA V Plus is an isotope ratio mass spectrometer designed to measure isotopic, elemental and molecular ratios of organic and inorganic compounds. The DELTA V Plus is an enhanced model of the DELTA V series of isotope ratio mass spectrometers, which can be upgraded from the DELTA V Advantage. The DELTA V Plus can be operated in Continuous Flow or Dual Inlet mode and can accommodate up to 10 collectors, ensuring flexibility to cover many applications. The DELTA V Plus is controlled by an automated, integrated Isodat software suite. A magnet, whose pole faces determine the free flight space for the ions, eliminates the traditional flight tube. The magnet is designed for fast mass switching which is further supported by a fast jump control between consecutive measurements of multiple gases within one run. The sample gas is introduced at ground potential, eliminating the need for insulation of the flow path, ensuring 100 percent transfer into the ion source. The amplifiers register ion beams up to 50 V. The DELTA V Plus has refined optics, enabling greater ion transmission than the DELTA V Advantage. It has a sensitivity of 800 molecules per ion (M/I) in Dual Inlet mode and 1100 M/I in Continuous Flow mode. It has a system stability of < 10 ppm and an effective magnetic detection radius of 191 nm. It has a mass range of 1 - 96 Dalton at 3 kV.
Metrohm 877 Titrino Plus
Metrohm 877 Titrino Plus
PI Supplied Instrument Name: Metrohm 877 Titrino Plus PI Supplied Instrument Description:DIC and TA measurements were obtained with a computer-controlled Metrohm 877 Titrino Plus. Instrument Name: Titrator Instrument Short Name:Titrator Instrument Description: Titrators are instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB12/
Cruise: SAV-21-24
SAV-21-24
R/V Savannah
Community Standard Description
R/V Savannah
vessel
SAV-21-24
Martial Taillefert
Georgia Institute of Technology
Cruise: SAV-21-15
SAV-21-15
R/V Savannah
Community Standard Description
R/V Savannah
vessel
SAV-21-15
Martial Taillefert
Georgia Institute of Technology
Cruise: SAV-22-06
SAV-22-06
R/V Savannah
Community Standard Description
R/V Savannah
vessel
SAV-22-06
Martial Taillefert
Georgia Institute of Technology
Cruise: SAV-22-11
SAV-22-11
R/V Savannah
Community Standard Description
R/V Savannah
vessel
SAV-22-11
Martial Taillefert
Georgia Institute of Technology
R/V Savannah
Community Standard Description
R/V Savannah
vessel