http://lod.bco-dmo.org/id/dataset/904722
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
2023-07-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Supplementary discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from Ocean Observatories Initiative (OOI) cruises to the Irminger Sea Array 2018-2019
2023-07-19
publication
2023-07-19
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2023-08-24
publication
https://doi.org/10.26008/1912/bco-dmo.904722.1
Hilary I. Palevsky
Boston College
principalInvestigator
David P. Nicholson
Woods Hole Oceanographic Institution
principalInvestigator
Kristen E. Fogaren
Boston 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: Palevsky, H. I., Fogaren, K. E., Nicholson, D. P., Yoder, M. (2023) Supplementary discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from Ocean Observatories Initiative (OOI) cruises to the Irminger Sea Array 2018-2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-07-19 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.904722.1 [access date]
Niskin Bottle DO, DIC and TA Dataset Description: <p dir="ltr">The Ocean Observatories Initiative (OOI) is a long-term NSF-funded program that deploys autonomous sensors on both moored and mobile platforms at multiple locations, including the Global Irminger Sea Array (60.46°N, 38.44°W) (Trowbridge et al., 2019). The OOI program conducts yearly turn-around cruises to the Irminger Sea Array to recover and redeploy moorings and gliders deployed year-round at this site. During these cruises the OOI program routinely conducts Conductivity Temperature Depth (CTD) casts and collects water samples from Niskin bottles on the CTD rosette for discrete sample analysis. These turn-around cruise data are critical for validation and calibration of the data from sensors deployed year-round and also provide a valuable dataset in and of themselves (Palevsky et al., 2023).</p>
<p dir="ltr">For this project, our team participated in two of the yearly turn-around cruises to the OOI Irminger Sea Array (AR30-03, 4-24 June, 2018 and AR35-05, 2-25 August, 2019)&nbsp; and collected supplementary additional samples from CTD casts to further support efforts to improve the capacity to produce high-quality data products from OOI’s biogeochemical sensors to enable analysis of scientific questions about the ocean’s biological carbon pump and other carbon cycling processes (Palevsky and Nicholson, 2018; Palevsky et al., 2023).</p>
<p dir="ltr">These supplemental data provided here were collected in coordination with data collected by the OOI program. The complete collection of shipboard data and cruise documentation from these cruises is available from an OOI managed document storage system called Alfresco (see related publications), following the path: OOI &gt; Global Irminger Sea Array&nbsp; &gt; Cruise Data &gt; {Cruise ID}. For more information on OOI data access options and recommendations for use of cruise data to calibrate OOI biogeochemical sensors, see the OOI Biogeochemical Sensor Data Best Practices and User Guide (Palevsky et al., 2023).</p>
<p dir="ltr">Full cruise data from the OOI Irminger Sea cruises for which discrete sample data are presented here can be accessed via the Rolling Deck to Repository (R2R, see deployments) and OOI’s Alfresco data management server (see related publications):</p>
<ul>
<li dir="ltr">
<p dir="ltr">Irminger Sea 5 cruise, June 2018, AR30-03. Alfresco path: Global Irminger Sea Array&nbsp; &gt; Cruise Data &gt; Irminger_Sea-05_AR30-03_2018-06-05</p>
</li>
<li dir="ltr">
<p dir="ltr">Irminger Sea 6 cruise, August 2019, AR35-05. Alfresco path: Global Irminger Sea Array&nbsp; &gt; Cruise Data &gt; &nbsp;&nbsp; &nbsp;Irminger_Sea-06_AR35-05_2019-08-02</p>
</li>
</ul>
<p dir="ltr">The McRaven 2022 datasets (see related datasets) provide salinity-calibrated Conductivity Temperature Depth (CTD) data from the OOI Irminger Sea cruises for which discrete sample data are presented here.</p> Methods and Sampling: <p dir="ltr">Dissolved Oxygen:</p>
<p dir="ltr">Samples were collected and preserved for Winkler dissolved oxygen analysis following standard protocols (Langdon, 2010). Supplementary samples collected for this project were collected in duplicate&nbsp; into volume-calibrated flasks and were titrated onboard the ship within 24-48 hours of collection using a custom-built Winkler titrator with automated potentiometric end point detection (control software available<u>:</u> Nicholson et al., 2023).</p>
<p dir="ltr">Precision of the sample collection and analysis procedure is determined by agreement between replicate measurements from the same Niskin bottle. Median agreement of replicates across both cruises was 0.12% (0.4 μmol/kg).</p>
<p dir="ltr">Accuracy of sample measurements depends on standardization of the sodium thiosulfate titrant based on a reference standard. The sodium thiosulfate titrant used on each cruise was determined by standardization with a 0.01N potassium iodate reference solution from Fujifilm WAKO chemicals. Lab-prepared potassium iodate standards, measured routinely throughout both cruises to verify titration accuracy and stability, were verified and adjusted by measurements against the WAKO standard.</p>
<p dir="ltr">Dissolved oxygen discrete measurements collected and analyzed by the OOI program as part of their routine operations are labeled as Oxygen1. The supplementary dissolved oxygen discrete measurements collected for this project are labeled as Oxygen2 and Oxygen3. Intercomparison across samples collected from the same Niskin bottles by the two groups yielded an offset of 0.5±1.5 μmol/kg for AR30-03 (June 2018) and 0.4±0.6 μmol/kg for AR35-05 (August 2019).</p>
<p dir="ltr">Dissolved Inorganic Carbon and Total Alkalinity:</p>
<p dir="ltr">Samples were collected for dissolved inorganic carbon (DIC) and total alkalinity (TA) analysis following standard protocols (Dickson et al., 2007). Samples were collected into either 250 mL or 500 mL borosilicate glass bottles and preserved with saturated mercuric chloride (100 μL in 250 mL bottles, 200 μL in 500 mL bottles) for later analysis.</p>
<p dir="ltr">Samples were analyzed at the Boston College Marine Biogeochemistry Laboratory. DIC was analyzed using an Apollo SciTech AS-C6L DIC Analyzer and TA was analyzed using an Apollo SciTech AS-ALK2 TA Analyzer. Both DIC and TA were measured from each sample bottle. All DIC measurements were made on the day the bottle was opened for analysis, and TA measurements were made within the same week. DIC and TA instruments were calibrated daily and monitored throughout each analysis session by measuring Certified Reference Materials (Andrew Dickson, UCSD).</p>
<p dir="ltr">Analytical replicates were measured for all samples such that after analytical outliers (&gt;SD) were removed, all samples for both DIC and TA retained at least two replicate measurements (median number of replicates for DIC = 3; median number of replicates for TA = 5). Analytical precision was determined for each sample as the standard deviation of analytical replicates. Mean analytical precision for all DIC samples in this dataset is 0.8 μmol/kg. Mean analytical precision for all TA samples in this dataset is 2.9 μmol/kg. Individual samples are flagged as questionable (QC flag = 3) if the analytical precision is &gt;8 umol/kg. Individual samples for DIC are also flagged as questionable (QC flag = 3) if CRMs run prior and subsequent to the sample in question differ by &gt;8 μmol/kg.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1946072 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1946072
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1756613 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1756613
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1755574 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1755574
completed
Hilary I. Palevsky
Boston College
617-552-4936
Boston College Dept of Earth and Environmental Sciences 140 Commonwealth Ave
Chestnut Hill
MA
02467
USA
palevsky@bc.edu
pointOfContact
David P. Nicholson
Woods Hole Oceanographic Institution
508-289-3547
266 Woods Hole Rd. MS#25
Woods Hole
MA
02543
USA
dnicholson@whoi.edu
pointOfContact
Kristen E. Fogaren
Boston College
Boston College Department of Earth and Environmental Sciences
kristen.fogaren@bc.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise
Cast
Lat
Lon
Date_UTC
Niskin_ID
CTDPRES
CTDTEMP_ITS90
CTDTEMP_flag
CTDSAL_PSS78
CTDSAL_flag
CTDOXYCUR
CTDOXYCUR_flag
CTDOXY
CTDOXY_flag
AAOXYCUR
AAOXYCUR_flag
AAOXY
AAOXY_flag
Oxygen1
Oxygen1_flag
Oxygen2
Oxygen2_flag
Oxygen3
Oxygen3_flag
DIC
DIC_flag
TA
TA_flag
file_name
Apollo SciTech AS-ALK2 TA Analyzer
Apollo SciTech AS-C6L DIC Analyzer
Custom-built Winkler dissolved oxygen titrator
theme
None, User defined
cruise id
cast
latitude
longitude
ISO_DateTime_UTC
Niskin bottle number
water pressure
water temperature at measurement depth
flag
salinity
Oxygen in volts
dissolved Oxygen
dissolved organic Carbon
dissolved inorganic Carbon
total alkalinity (TA)
file_name
featureType
BCO-DMO Standard Parameters
Apollo SciTech AS-ALK2 total alkalinity titrator
Inorganic Carbon Analyzer
Winkler Oxygen Titrator
instrument
BCO-DMO Standard Instruments
AR30-03
AR35-05
service
Deployment Activity
Irminger 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.
Collaborative Research: The Annual Cycle of the Biological Carbon Pump in the Subpolar North Atlantic
https://osprey.bco-dmo.org/project/897642
Collaborative Research: The Annual Cycle of the Biological Carbon Pump in the Subpolar North Atlantic
<p>NSF abstract:<br />
Ocean biology plays an important role in the Earth's carbon cycle. While most of the organic material produced by phytoplankton in the sunlit surface waters of the oceans is eaten and recycled in the surface waters, a small amount sinks to the deep ocean in what is called the "biological carbon pump." The biological pump is particularly hard to study in high latitude regions, which can be difficult to get to and challenging to work in. It is also particularly important to understand the biological pump in these parts of the ocean, where much of the world's deep ocean waters are formed. The export of carbon to deep waters can be estimated by carefully measuring the amount of excess oxygen left behind in surface waters. Oxygen in seawater can be measured very precisely using sensors deployed on moorings, floats, and gliders. These sensors can be deployed for years at a time, but their measurements must be carefully calibrated. In this project, investigators would use carefully calibrated oxygen sensors on gliders to, in turn, calibrate the oxygen sensors on a set of moorings in the high latitude North Atlantic Ocean, to study the biological carbon pump over a period of two years. The project would train several undergraduate students and a graduate student, and result in the development of educational laboratory materials that incorporate glider and mooring data from the project.</p>
<p>The goal of this proposal is to observationally constrain the annual magnitude and seasonal timing of the biological carbon pump (determined as annual net community production; ANCP) and its influence on air-sea carbon dioxide flux by using biogeochemical sensor measurements from the Ocean Observatories Initiative (OOI) Irminger Sea Array. However, existing OOI oxygen sensor calibration suffers from both pre- and post-deployment drift, currently precluding the ability to calculate ANCP by oxygen mass balance. The investigators therefore propose to improve the accuracy and utility of OOI Irminger Sea oxygen measurements by deploying two gliders configured for air calibration of their oxygen sensors when surfacing between profiles. These air-calibrated gliders will be used to intercalibrate all 12 existing oxygen sensors on the Irminger Sea Array and produce a calibrated oxygen product incorporating data from all sensors, which will ensure sufficient accuracy to calculate ANCP. Both the annual magnitude and seasonal timing of ANCP, including upper ocean biological productivity and thermocline respiration, will be determined using an oxygen mass balance approach within a data- constrained 1D physical model. A suite of 1D model simulations including the inorganic carbon system, gas exchange, and ANCP determined from oxygen mass balance will be used, together with OOI carbon dioxide measurements, to diagnose influences of physical and biological drivers of air-sea carbon dioxide flux, improving both quantitative and mechanistic understanding of how the biological pump influences the carbon cycle.</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>
OOI Irminger BCP
largerWorkCitation
project
eng; USA
oceans
Irminger Sea
-39.8835
-28.6567
59.7123
62.7715
2018-06-06
2019-08-15
Irminger Sea
0
BCO-DMO catalogue of parameters from Supplementary discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from Ocean Observatories Initiative (OOI) cruises to the Irminger Sea Array 2018-2019
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/906642.rdf
Name: Cruise
Units: unitless
Description: <p>Cruise ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/906643.rdf
Name: Cast
Units: unitless
Description: <p>Cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/906644.rdf
Name: Lat
Units: decimal degrees
Description: <p>Sampling location latitude, south is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/906645.rdf
Name: Lon
Units: decimal degrees
Description: <p>Sampling location longitude, west is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/906646.rdf
Name: Date_UTC
Units: unitless
Description: <p>Sampling date in UTC format (yyyy-mm-ddThh:mmZ)</p>
http://lod.bco-dmo.org/id/dataset-parameter/906647.rdf
Name: Niskin_ID
Units: unitless
Description: <p>Unique Niskin bottle number from the CTD rosette</p>
http://lod.bco-dmo.org/id/dataset-parameter/906648.rdf
Name: CTDPRES
Units: dbar
Description: <p>Hydrostatic pressure recorded from CTD at the depth where the sample was taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/906649.rdf
Name: CTDTEMP_ITS90
Units: degrees C
Description: <p>In situ temperature recorded from CTD on the ITS-90 scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/906650.rdf
Name: CTDTEMP_flag
Units: unitless
Description: <p>Quality control flag; all data processed by McRaven (2022) marked as 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/906651.rdf
Name: CTDSAL_PSS78
Units: unitless
Description: <p>Calibrated salinity (Practical Salinity Scale of 1978) calculated from conductivity recorded with CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/906652.rdf
Name: CTDSAL_flag
Units: unitless
Description: <p>Quality control flag; all data processed by McRaven (2022) marked as 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/906653.rdf
Name: CTDOXYCUR
Units: volts
Description: <p>Oxygen current from the SeaBird SBE43 oxygen sensor on the CTD package, processed with the SBE default hysteresis correction</p>
http://lod.bco-dmo.org/id/dataset-parameter/906654.rdf
Name: CTDOXYCUR_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Fogaren and Palevsky, 2023 and Palevsky et al. 2023 datasets.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906655.rdf
Name: CTDOXY
Units: umol/kg
Description: <p>Calibrated dissolved oxygen content from oxygen sensor mounted on the CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/906656.rdf
Name: CTDOXY_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Fogaren and Palevsky, 2023 and Palevsky et al. 2023 datasets.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906657.rdf
Name: AAOXYCUR
Units: volts
Description: <p>Raw oxygen current from the Aanderaa oxygen optode added to the CTD package</p>
http://lod.bco-dmo.org/id/dataset-parameter/906658.rdf
Name: AAOXYCUR_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Fogaren and Palevsky, 2023 and Palevsky et al. 2023 datasets.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906659.rdf
Name: AAOXY
Units: umol/kg
Description: <p>Calibrated dissolved oxygen content from oxygen optode added to the CTD package</p>
http://lod.bco-dmo.org/id/dataset-parameter/906660.rdf
Name: AAOXY_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Fogaren and Palevsky, 2023 and Palevsky et al. 2023 datasets.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906661.rdf
Name: Oxygen1
Units: umol/kg
Description: <p>Dissolved oxygen content measured from discrete-bottle-based Winkler titration by OOI program</p>
http://lod.bco-dmo.org/id/dataset-parameter/906662.rdf
Name: Oxygen1_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Palevsky et al. 2023 dataset.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906663.rdf
Name: Oxygen2
Units: umol/kg
Description: <p>Dissolved oxygen content measured from discrete-bottle-based Winkler titration by this project team</p>
http://lod.bco-dmo.org/id/dataset-parameter/906664.rdf
Name: Oxygen2_flag
Units: unitless
Description: <p>Quality control flag; see data documentation Palevsky et al. 2023 dataset.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906665.rdf
Name: Oxygen3
Units: umol/kg
Description: <p>Dissolved oxygen content measured from discrete-bottle-based Winkler titration by this project team</p>
http://lod.bco-dmo.org/id/dataset-parameter/906666.rdf
Name: Oxygen3_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Palevsky et al. 2023 dataset.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906667.rdf
Name: DIC
Units: umol/kg
Description: <p>Total dissolved inorganic carbon content</p>
http://lod.bco-dmo.org/id/dataset-parameter/906668.rdf
Name: DIC_flag
Units: unitless
Description: <p>Quality control flag;see data documentation Palevsky et al. 2023 dataset.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906669.rdf
Name: TA
Units: umol/kg
Description: <p>Total alkalinity content</p>
http://lod.bco-dmo.org/id/dataset-parameter/906670.rdf
Name: TA_flag
Units: unitless
Description: <p>Quality control flag; see data documentation with Palevsky et al. 2023 dataset.</p>
http://lod.bco-dmo.org/id/dataset-parameter/906671.rdf
Name: file_name
Units: unitless
Description: <p>File name of separate file</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
31860
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/702593c5-092e-41ad-8a0d-55dd8a32cd06/content
download
https://doi.org/10.26008/1912/bco-dmo.904722.1
download
onLine
dataset
<p dir="ltr">Dissolved Oxygen:</p>
<p dir="ltr">Samples were collected and preserved for Winkler dissolved oxygen analysis following standard protocols (Langdon, 2010). Supplementary samples collected for this project were collected in duplicate&nbsp; into volume-calibrated flasks and were titrated onboard the ship within 24-48 hours of collection using a custom-built Winkler titrator with automated potentiometric end point detection (control software available<u>:</u> Nicholson et al., 2023).</p>
<p dir="ltr">Precision of the sample collection and analysis procedure is determined by agreement between replicate measurements from the same Niskin bottle. Median agreement of replicates across both cruises was 0.12% (0.4 μmol/kg).</p>
<p dir="ltr">Accuracy of sample measurements depends on standardization of the sodium thiosulfate titrant based on a reference standard. The sodium thiosulfate titrant used on each cruise was determined by standardization with a 0.01N potassium iodate reference solution from Fujifilm WAKO chemicals. Lab-prepared potassium iodate standards, measured routinely throughout both cruises to verify titration accuracy and stability, were verified and adjusted by measurements against the WAKO standard.</p>
<p dir="ltr">Dissolved oxygen discrete measurements collected and analyzed by the OOI program as part of their routine operations are labeled as Oxygen1. The supplementary dissolved oxygen discrete measurements collected for this project are labeled as Oxygen2 and Oxygen3. Intercomparison across samples collected from the same Niskin bottles by the two groups yielded an offset of 0.5±1.5 μmol/kg for AR30-03 (June 2018) and 0.4±0.6 μmol/kg for AR35-05 (August 2019).</p>
<p dir="ltr">Dissolved Inorganic Carbon and Total Alkalinity:</p>
<p dir="ltr">Samples were collected for dissolved inorganic carbon (DIC) and total alkalinity (TA) analysis following standard protocols (Dickson et al., 2007). Samples were collected into either 250 mL or 500 mL borosilicate glass bottles and preserved with saturated mercuric chloride (100 μL in 250 mL bottles, 200 μL in 500 mL bottles) for later analysis.</p>
<p dir="ltr">Samples were analyzed at the Boston College Marine Biogeochemistry Laboratory. DIC was analyzed using an Apollo SciTech AS-C6L DIC Analyzer and TA was analyzed using an Apollo SciTech AS-ALK2 TA Analyzer. Both DIC and TA were measured from each sample bottle. All DIC measurements were made on the day the bottle was opened for analysis, and TA measurements were made within the same week. DIC and TA instruments were calibrated daily and monitored throughout each analysis session by measuring Certified Reference Materials (Andrew Dickson, UCSD).</p>
<p dir="ltr">Analytical replicates were measured for all samples such that after analytical outliers (&gt;SD) were removed, all samples for both DIC and TA retained at least two replicate measurements (median number of replicates for DIC = 3; median number of replicates for TA = 5). Analytical precision was determined for each sample as the standard deviation of analytical replicates. Mean analytical precision for all DIC samples in this dataset is 0.8 μmol/kg. Mean analytical precision for all TA samples in this dataset is 2.9 μmol/kg. Individual samples are flagged as questionable (QC flag = 3) if the analytical precision is &gt;8 umol/kg. Individual samples for DIC are also flagged as questionable (QC flag = 3) if CRMs run prior and subsequent to the sample in question differ by &gt;8 μmol/kg.</p>
Specified by the Principal Investigator(s)
<p dir="ltr">For details on the processing of the calibrated CTD and oxygen sensor data, see Fogaren and Palevsky, 2023 (see Related Datasets below).</p>
<p dir="ltr">Quality flags applied to the discrete dissolved oxygen data refer to the fit between the data and the non-linear multiple regression model used to generate the final calibrated dissolved oxygen sensor data based on the fit to the discrete samples.</p>
<p dir="ltr">&nbsp;&nbsp; &nbsp;1 = not evaluated<br />
&nbsp;&nbsp;&nbsp; 2 = acceptable (fits model)<br />
&nbsp;&nbsp;&nbsp; 3 = questionable (model-determined outlier)<br />
&nbsp;&nbsp;&nbsp; 9 = missing value</p>
<p dir="ltr">Flags are applied individually to all oxygen measurements, both from the OOI program measurements and from supplementary measurements completed for this project.</p>
<p dir="ltr">Quality flags applied to this dataset follow the recommendations of Jiang et al. 2022:</p>
<p dir="ltr">&nbsp;&nbsp; &nbsp;1 = not evaluated/quality unknown<br />
&nbsp; &nbsp; 2 = acceptable<br />
&nbsp;&nbsp;&nbsp; 3 = questionable&nbsp;<br />
&nbsp;&nbsp;&nbsp; 4 = known bad<br />
&nbsp;&nbsp;&nbsp; 6 = median of replicates<br />
&nbsp;&nbsp;&nbsp; 9 = Missing value</p>
<p dir="ltr">During the August 2019 cruise (AR35-05), failure of the pylon on the CTD rosette precluded the ability to automatically trip Niskin bottles for the majority of the cruise, until a replacement pylon was able to be delivered to the ship. No bottle sample measurements for this cruise are reported prior to cast 10, which was the first cast after the replacement pylon was installed. During AR35-05, there was also an un-resolved issue with the primary CTD and SBE43 sensor oxygen measurements on the CTD rosette. Due to these issues, an Aanderaa oxygen sensor was added to the CTD rosette. Oxygen sensor data from this cruise are calibrated data produced by the Aanderaa oxygen sensor (AAOXY; for more detailed information, see documentation provided with Fogaren and Palevsky, 2023 dataset). All data from this sensor are flagged as questionable (QC flag = 3), since Aanderaa optodes are not typically used on CTD sensor packages because they have a slower response time than the SBE43 and even after lag correction cannot fully resolve steep gradients at the pace that the CTD rosette is raised/lowered.</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
* Merged files into 1 datafile
* Added lat/lon/date
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
Apollo SciTech AS-ALK2 TA Analyzer
Apollo SciTech AS-ALK2 TA Analyzer
PI Supplied Instrument Name: Apollo SciTech AS-ALK2 TA Analyzer Instrument Name: Apollo SciTech AS-ALK2 total alkalinity titrator Instrument Short Name:Apollo SciTech AS-ALK2 Instrument Description: An automated acid-base titrator for use in aquatic carbon dioxide parameter analysis. The titrator provides standardisation and sample analysis, using the Gran titration procedure for alkalinity determination of seawater and brackish waters. It is designed for both shipboard and land based laboratory use. The precision of the instrument is 0.1 percent or higher, and sample volumes may range from 10-25 ml. Titration takes approximately 8 minutes per sample, and the repeatability is within plus or minus 1-2 micromoles per kg.
Apollo SciTech AS-C6L DIC Analyzer
Apollo SciTech AS-C6L DIC Analyzer
PI Supplied Instrument Name: Apollo SciTech AS-C6L DIC Analyzer Instrument Name: Inorganic Carbon Analyzer Instrument Short Name: Instrument Description: Instruments measuring carbonate in sediments and inorganic carbon (including DIC) in the water column.
Custom-built Winkler dissolved oxygen titrator
Custom-built Winkler dissolved oxygen titrator
PI Supplied Instrument Name: Custom-built Winkler dissolved oxygen titrator PI Supplied Instrument Description:Custom-built Winkler dissolved oxygen titrator: Documentation and code developed and used for oxygen titrations for this project (Nicholson et al., 2023: https://doi.org/10.5281/zenodo.8048208)
Instrument Name: Winkler Oxygen Titrator Instrument Short Name:Winkler Titrator Instrument Description: A Winkler Oxygen Titration system is used for determining concentration of dissolved oxygen in seawater. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB12/
Cruise: AR30-03
AR30-03
International Council for the Exploration of the Sea
R/V Neil Armstrong
vessel
AR30-03
Alison Macdonald
Woods Hole Oceanographic Institution
Cruise: AR35-05
AR35-05
International Council for the Exploration of the Sea
R/V Neil Armstrong
vessel
AR35-05
Sheri White
Woods Hole Oceanographic Institution
International Council for the Exploration of the Sea
R/V Neil Armstrong
vessel