http://lod.bco-dmo.org/id/dataset/957527
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
2025-04-01
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Open cell and single-step method for total alkalinity titrations from samples collected on R/V Mirai cruises MR23-06C and MR23-07 in the North Pacific and Western Arctic from September to November 2023
2025-07-29
publication
2025-07-29
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-04-09
publication
https://doi.org/10.26008/1912/bco-dmo.957527.1
Ryan Woosley
Massachusetts 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: Woosley, R., Bruno, J. A., Neithardt, D. (2025) Open cell and single-step method for total alkalinity titrations from samples collected on R/V Mirai cruises MR23-06C and MR23-07 in the North Pacific and Western Arctic from September to November 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2025-07-29 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.957527.2 [access date]
Open cell and single-step titration method comparison Dataset Description: <p><strong>Version 2 (the current version) contains the following changes from version 1:</strong><br />
- Corrections to a small number of values where, rather than giving the average of two duplicates, the value of one replicate was given (Column 16, flags 6, for cruise MR23-07).<br />
- The addition of column Final_pHt_for_Single_Step_method_TA.</p> Methods and Sampling: <p>Samples were collected from the CTD rosette following best practices (Dickson et al., 2007). Samples for single-step total alkalinity (TA) titrations were collected in 100-milliliter (mL) borosilicate glass bottles, and samples for open cell titrations were collected in 250-mL borosilicate glass bottles. Samples were poisoned with 0.04% HgCl2 and a precise headspace of ~1% was created using a pipette. Bottles were sealed with ground glass stopper, and apiezon L grease and a rubber band and plastic hose clamp were used to keep the stopper in place.</p>
<p>The TA measured on board was measured by single-step titration with spectrophotometric endpoint detection using bromocresol green following the methods of Yao and Byrne (1998). The duplicate samples were shipped to the laboratory at Massachusetts Institute of Technology (MIT) in Cambridge, MA, USA for analysis using an open cell titration and non-linear least squares fitting as described in Dickson et al. (2003). DIC for both shipboard and land-based analysis was done by acidification and coulometric detection following best practices methods (Dickson et al. 2007).</p>
<p>Land-based pH on the total scale (pHt) at 20 degrees Celsius was done using a custom-built instrument similar to Carter et al. (2013) and purified meta-cresol purple indicator.</p>
<p><strong>Instrumentation:</strong><br />
The shipboard TA analysis by single step titration was done using spectrophotometry with a single acid addition procedure using a custom-made system (Nippon ANS, Inc., Japan).</p>
<p>Land-based TA was performed with a custom-designed titration designed and built by the laboratory of Andrew G. Dickson (University of California, San Diego) as described in Dickson et al. (2003).</p>
<p>Shipboard DIC was determined using an automated TCO2 analyzer (Nippon ANS, Inc., Japan) with coulometric detection.</p>
<p>Land-based DIC was determined by a custom dissolved inorganic carbon extraction with coulometric detection built by the National Oceanographic and Atmospheric Administration Pacific Marine Laboratory and is a modern version of the original SOMMA system (Johnson et al. 1992).</p>
<p>Land-based pHt was measured at 20 degrees Celsius with a custom system designed and built by the Woosley laboratory consisting of a Kloehn syringe pump and Agilent 8453 spectrophotometer and controlled using LabView Software.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2148468 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2148468
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2342986 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2342986
completed
Ryan Woosley
Massachusetts Institute of Technology
617-253-1984
77 Massachusetts Ave Bldg. 54-1414
Cambridge
MA
02139
USA
rwoosley@mit.edu
pointOfContact
asNeeded
Dataset Version: 2
Unknown
Cruise
sample_ID
Station
Cast
NiskinBottle_No
Date
Time
ISO_DateTime_UTC
LATITUDE
LONGITUDE
CTD_Salinity
CTD_Salinity_flag
Bottle_Salinity
Bot_Sal_flag
CTD_Pressure
Total_Alkalinity_Single_Step_method
Total_Alkalinity_Single_Step_Method_flag
Final_pHt_for_Single_Step_method_TA
Total_Alkalinity_Open_Cell_Method
Total_Alkalinity_Open_Cell_Method_Flag
Ship_DIC
Ship_DIC_flag
Lab_DIC
Lab_DIC_analytical_flag
Lab_DIC_Storage_flag
Ship_pHt
Ship_pHt_flag
Ship_pH_Temp
Lab_pHt
Lab_pHt_analytical_flag
Lab_pHt_storage_flag
Lab_pHt_temp
CTDTEMP
CTDTEMP_Flag
O2
O2_flag
DOC
DOC_flag
NO3
NO3_flag
NO2
NO2_flag
Si
Si_flag
PO4
PO4_flag
NH4
NH4_flag
fDOM
fDOM_flag
Agilent 8453 spectrophotometer
TCO2 analyzer (Nippon ANS, Inc., Japan)
a modern version of the original SOMMA system
custom-designed titration
theme
None, User defined
Cruise identfier
sample identification
station
cast
bottle
date
time of day
ISO_DateTime_UTC
latitude
longitude
salinity
quality flag
water pressure
total alkalinity (TA)
pH
dissolved inorganic Carbon
water temperature at measurement depth
dissolved Oxygen
dissolved organic Carbon
Nitrate
Nitrite
Silicate, Si(OH)4, silicic acid
phosphate
Ammonium
fDOM
featureType
BCO-DMO Standard Parameters
Agilent 8453 UV-visible spectrophotometer
CO2 Analyzer
Single Operator Multi-parameter Metabolic Analyzer
Titrator
instrument
BCO-DMO Standard Instruments
MR23-06C
MR23-07
service
Deployment Activity
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.
US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement
https://osprey.bco-dmo.org/project/890561
US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement
<p><em><strong>NSF Award Abstract</strong></em><br />
The oceans help to slow climate change by absorbing about a quarter of the carbon dioxide (CO2) produced by burning of fossil fuels and other human activities. The Pacific and Southern Oceans are known to take up and store significant amounts of anthropogenic CO2, but many questions regarding the amount, variability, and biogeochemical and ecological impacts remain unanswered. This research will focus on answering some of those questions in two areas of the Pacific by analyzing samples for total CO2, total alkalinity, and pH on two GEOTRACES cruises, GP17-OCE and GP17-ANT. The project will support several undergraduate student researchers and create educational modules on ocean acidification for general public and K-12 students.</p>
<p>On the GP17-OCE expedition in the south Pacific, sub-decadal scale variability in the uptake of CO2 and resulting decrease in pH (termed ocean acidification) will be examined by comparing data collected on this expedition with data from prior occupations of the line in 1991, 2005 and 2014. An extended multilinear regression technique will be used to separate natural variability from human induced changes. The second expedition, GP17-ANT, covers the Amundsen Sea, an area with few prior carbon measurements. This sea is perennially ice-covered with several seasonal polynyas (areas of open water surrounded by sea ice) and exhibits complex water circulation making the contribution to the global carbon cycle uncertain. The data collected from this expedition will examine several hypotheses regarding how carbon is taken up, mixed, and recirculated in the region, how glacial ice melt, sea ice, and biological productivity influence the carbon cycle, and provide baseline measurements against future data to determine changes in the carbon cycle of the region over time. Both expeditions will leverage the myriad of other parameters being measured, particularly trace metals such as iron and zinc, to examine how cycling of carbon and trace metals are interlinked through pH.</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>
GP17-OCE and GP17-ANT Inorganic Carbon
largerWorkCitation
project
Collaborative Research: Opening the black box of oxygen deficient zone biogeochemistry through integrative tracers
https://osprey.bco-dmo.org/project/939276
Collaborative Research: Opening the black box of oxygen deficient zone biogeochemistry through integrative tracers
<p>NSF abstract:</p>
<p>The oxygen deficient zones are regions in the ocean where dissolved oxygen disappears. These regions harbor unique ecosystems only found in waters without oxygen, and they are important for Earth’s climate. Specifically, the production of nitrogen gas by two microbial processes, anammox and denitrification can control how productive the oceans are. Yet how much each process shapes ocean chemistry within these areas remains unknown. This project aims to study the oxygen deficient waters of the eastern tropical North Pacific ocean to better understand the mechanisms shaping marine nitrogen and carbon chemistry. Through this work, the project will train undergraduate and graduate students at three universities. The project aims to broaden participation in and understanding of ocean sciences by developing public videos about the methods used and the science behind the project.</p>
<p>The investigators will conduct a research cruise in the eastern tropical North Pacific ocean, the largest oxygen deficient zone. They will measure many nutrients including inorganic carbon and nitrogen and natural abundance stable isotopes of nitrogen compounds. They will use these patterns to establish how the major reactions work together to control nitrogen cycling and gaseous nitrogen production. In addition, a high-resolution model of the ocean will reveal the influence of ocean mixing, set the timescales for reactions, and enable synthesis of the measurements into a global context. The work will determine how the input of oxygen through mixing controls chemistry, and it will distinguish between the processes restricted to the permanently anoxic core vs. those that tolerate (or are enhanced by) occasional oxygenation. Overall, the project will provide new information about nitrogen cycling pathways (anammox, denitrification, and nitrite oxidation) across the region and link the resulting isotopic signals to the global nitrogen budget.</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>
O2 Deficient Zone Tracers
largerWorkCitation
project
eng; USA
oceans
179.4858
-143.0531
27.5003
77.0399
2023-09-07
2023-11-01
From projects that focused on the following 2 locations: 1. South Pacific and Amundsen Sea 2. eastern tropical North Pacific ocean
0
BCO-DMO catalogue of parameters from Open cell and single-step method for total alkalinity titrations from samples collected on R/V Mirai cruises MR23-06C and MR23-07 in the North Pacific and Western Arctic from September to November 2023
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/970109.rdf
Name: Cruise
Units: unitless
Description: <p>Cruise identification number</p>
http://lod.bco-dmo.org/id/dataset-parameter/970110.rdf
Name: sample_ID
Units: unitless
Description: <p>Sample identifier composed of formula (Station"*1000)+("Cast"*100)+("Niskin")"</p>
http://lod.bco-dmo.org/id/dataset-parameter/970111.rdf
Name: Station
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/970112.rdf
Name: Cast
Units: unitless
Description: <p>Cast identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/970113.rdf
Name: NiskinBottle_No
Units: unitless
Description: <p>Niskin bottle identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/970114.rdf
Name: Date
Units: unitless
Description: <p>Station occupation date</p>
http://lod.bco-dmo.org/id/dataset-parameter/970115.rdf
Name: Time
Units: unitless
Description: <p>Station occupation time (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/970116.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Station occupation date and time (UTC) in ISO8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/970117.rdf
Name: LATITUDE
Units: degrees North
Description: <p>Latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/970118.rdf
Name: LONGITUDE
Units: degrees East
Description: <p>Longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/970119.rdf
Name: CTD_Salinity
Units: unitless
Description: <p>Practical salinity as measured by the CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/970120.rdf
Name: CTD_Salinity_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970121.rdf
Name: Bottle_Salinity
Units: unitless
Description: <p>Practical salinity measured from the niskin bottle</p>
http://lod.bco-dmo.org/id/dataset-parameter/970122.rdf
Name: Bot_Sal_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970123.rdf
Name: CTD_Pressure
Units: decibars (db)
Description: <p>Pressure</p>
http://lod.bco-dmo.org/id/dataset-parameter/970124.rdf
Name: Total_Alkalinity_Single_Step_method
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Total alkalinity as measured using the single-step titration method</p>
http://lod.bco-dmo.org/id/dataset-parameter/970125.rdf
Name: Total_Alkalinity_Single_Step_Method_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970126.rdf
Name: Final_pHt_for_Single_Step_method_TA
Units: total scale
Description: <p>pHt (total scale) measured at the end of the titration for the single step method of Total Alkalinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/970127.rdf
Name: Total_Alkalinity_Open_Cell_Method
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Total alkalinity as measured using the open cell method</p>
http://lod.bco-dmo.org/id/dataset-parameter/970128.rdf
Name: Total_Alkalinity_Open_Cell_Method_Flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970129.rdf
Name: Ship_DIC
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved inorganic carbon measured on board the ship</p>
http://lod.bco-dmo.org/id/dataset-parameter/970130.rdf
Name: Ship_DIC_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970131.rdf
Name: Lab_DIC
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved inorganic carbon measured in the laboratory</p>
http://lod.bco-dmo.org/id/dataset-parameter/970132.rdf
Name: Lab_DIC_analytical_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970133.rdf
Name: Lab_DIC_Storage_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970134.rdf
Name: Ship_pHt
Units: total scale
Description: <p>pH on the total scale measured on the ship</p>
http://lod.bco-dmo.org/id/dataset-parameter/970135.rdf
Name: Ship_pHt_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970136.rdf
Name: Ship_pH_Temp
Units: degrees Celsius
Description: <p>Temperature of ship pHt analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/970137.rdf
Name: Lab_pHt
Units: total scale
Description: <p>pH on the total scale measured in the laboratory</p>
http://lod.bco-dmo.org/id/dataset-parameter/970138.rdf
Name: Lab_pHt_analytical_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970139.rdf
Name: Lab_pHt_storage_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970140.rdf
Name: Lab_pHt_temp
Units: degrees Celsius
Description: <p>Temperature of lab pHt anaysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/970141.rdf
Name: CTDTEMP
Units: degrees Celsius
Description: <p>Temperature measured by the CTD sensor</p>
http://lod.bco-dmo.org/id/dataset-parameter/970142.rdf
Name: CTDTEMP_Flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970143.rdf
Name: O2
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved oxygen</p>
http://lod.bco-dmo.org/id/dataset-parameter/970144.rdf
Name: O2_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970145.rdf
Name: DOC
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissoloved organic carbon</p>
http://lod.bco-dmo.org/id/dataset-parameter/970146.rdf
Name: DOC_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970147.rdf
Name: NO3
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved nitrate</p>
http://lod.bco-dmo.org/id/dataset-parameter/970148.rdf
Name: NO3_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970149.rdf
Name: NO2
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved nitrite</p>
http://lod.bco-dmo.org/id/dataset-parameter/970150.rdf
Name: NO2_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970151.rdf
Name: Si
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/970152.rdf
Name: Si_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970153.rdf
Name: PO4
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved phosphate</p>
http://lod.bco-dmo.org/id/dataset-parameter/970154.rdf
Name: PO4_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970155.rdf
Name: NH4
Units: micromoles per kilogram of seawater (umol/kg_sw)
Description: <p>Dissolved ammonium</p>
http://lod.bco-dmo.org/id/dataset-parameter/970156.rdf
Name: NH4_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</p>
http://lod.bco-dmo.org/id/dataset-parameter/970157.rdf
Name: fDOM
Units: RU
Description: <p>Florescent dissolved organic carbon</p>
http://lod.bco-dmo.org/id/dataset-parameter/970158.rdf
Name: fDOM_flag
Units: unitless
Description: <p>WOCE QC flagging scheme</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
48496
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/33233d0d-6b38-4428-92e0-86cbf8e3107a/content
download
47011
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/9b65a38d-53af-4bf9-9046-69bc827a0952/content
download
https://doi.org/10.26008/1912/bco-dmo.957527.1
download
onLine
dataset
<p>Samples were collected from the CTD rosette following best practices (Dickson et al., 2007). Samples for single-step total alkalinity (TA) titrations were collected in 100-milliliter (mL) borosilicate glass bottles, and samples for open cell titrations were collected in 250-mL borosilicate glass bottles. Samples were poisoned with 0.04% HgCl2 and a precise headspace of ~1% was created using a pipette. Bottles were sealed with ground glass stopper, and apiezon L grease and a rubber band and plastic hose clamp were used to keep the stopper in place.</p>
<p>The TA measured on board was measured by single-step titration with spectrophotometric endpoint detection using bromocresol green following the methods of Yao and Byrne (1998). The duplicate samples were shipped to the laboratory at Massachusetts Institute of Technology (MIT) in Cambridge, MA, USA for analysis using an open cell titration and non-linear least squares fitting as described in Dickson et al. (2003). DIC for both shipboard and land-based analysis was done by acidification and coulometric detection following best practices methods (Dickson et al. 2007).</p>
<p>Land-based pH on the total scale (pHt) at 20 degrees Celsius was done using a custom-built instrument similar to Carter et al. (2013) and purified meta-cresol purple indicator.</p>
<p><strong>Instrumentation:</strong><br />
The shipboard TA analysis by single step titration was done using spectrophotometry with a single acid addition procedure using a custom-made system (Nippon ANS, Inc., Japan).</p>
<p>Land-based TA was performed with a custom-designed titration designed and built by the laboratory of Andrew G. Dickson (University of California, San Diego) as described in Dickson et al. (2003).</p>
<p>Shipboard DIC was determined using an automated TCO2 analyzer (Nippon ANS, Inc., Japan) with coulometric detection.</p>
<p>Land-based DIC was determined by a custom dissolved inorganic carbon extraction with coulometric detection built by the National Oceanographic and Atmospheric Administration Pacific Marine Laboratory and is a modern version of the original SOMMA system (Johnson et al. 1992).</p>
<p>Land-based pHt was measured at 20 degrees Celsius with a custom system designed and built by the Woosley laboratory consisting of a Kloehn syringe pump and Agilent 8453 spectrophotometer and controlled using LabView Software.</p>
Specified by the Principal Investigator(s)
<p>Certified reference material (CRM) provided by Andrew Dickson (UCSD) were used for all TA and DIC measurements. For shipboard analysis, Batch 209 was used. For laboratory analysis, batch 216 was used.</p>
<p>For single-step TA, the values were adjusted according to the ratio of the mean measured CRM value and the certified value. For open cell TA, no adjustment was made to the CRM.</p>
<p>For laboratory pHt, TRIS buffer made in house according to Paulsen and Dickson (2020) was used as an accuracy and precision check.</p>
Specified by the Principal Investigator(s)
Version 1:
(version date 2025-03-25)
- Imported original file "TA Comparison Submit to BCODMO.xlsx" into the BCO-DMO system.
- Marked "-999", "-999.0000", and "-999.000" as missing data values (missing data are empty/blank in the final csv file).
- Renamed fields to comply with BCO-DMO naming conventions.
- Created date-time UTC column in ISO 8601 format.
- Saved final file as "957527_v1_ta_comparison.csv".
Version 2:
(version date 2025-07-29)
- Imported revised file "TA Comparison Submit to BCODMO.xlsx" into the BCO-DMO system.
- Marked "-999", "-999.0000", and "-999.000" as missing data values (missing data are empty/blank in the final csv file).
- Renamed fields to comply with BCO-DMO naming conventions.
- Created date-time UTC column in ISO 8601 format.
- Rounded Total_Alkalinity_Open_Cell_Method, Final_pHt_for_Single_Step_method_TA, and Lab_pHt to 4 decimal places.
- Saved final file as "957527_v2_ta_comparison.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
Agilent 8453 spectrophotometer
Agilent 8453 spectrophotometer
PI Supplied Instrument Name: Agilent 8453 spectrophotometer PI Supplied Instrument Description:Land-based pHt was measured at 20 degrees Celsius with a custom system designed and built by the Woosley laboratory consisting of a Kloehn syringe pump and Agilent 8453 spectrophotometer and controlled using LabView Software. Instrument Name: Agilent 8453 UV-visible spectrophotometer Instrument Short Name:Agilent 8453 Instrument Description: The Agilent 8453 spectrophotometer is a laboratory optical instrument for chemical analysis to extract spectral information in the ultraviolet (UV) and visible light. The instrument radiates a single light beam by optically combining two source lamps: a deuterium-discharge lamp for the UV wavelength range and a tungsten lamp for the visible and short wave near-infrared (SWNIR) wavelength range. The beam passes through the sample, is focused and dispersed within the spectrograph lens, slit and grating, and reaches the diode array in the form of a spectral image. The diode array samples a wavelength range of 190 to 1100 nm at a mean sampling interval of 0.9 nm. The nominal spectral slit width is 1 nm and the stray light is less than 0.03%.
TCO2 analyzer (Nippon ANS, Inc., Japan)
TCO2 analyzer (Nippon ANS, Inc., Japan)
PI Supplied Instrument Name: TCO2 analyzer (Nippon ANS, Inc., Japan) PI Supplied Instrument Description:Shipboard DIC was determined using an automated TCO2 analyzer (Nippon ANS, Inc., Japan) with coulometric detection. Instrument Name: CO2 Analyzer Instrument Short Name:CO2 Analyzer Instrument Description: Measures atmospheric carbon dioxide (CO2) concentration. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/382/
a modern version of the original SOMMA system
a modern version of the original SOMMA system
PI Supplied Instrument Name: a modern version of the original SOMMA system PI Supplied Instrument Description:Land-based DIC was determined by a custom dissolved inorganic carbon extraction with coulometric detection built by the National Oceanographic and Atmospheric Administration Pacific Marine Laboratory and is a modern version of the original SOMMA system (Johnson et al. 1992). Instrument Name: Single Operator Multi-parameter Metabolic Analyzer Instrument Short Name:SOMMA Instrument Description: Single Operator Multi-parameter Metabolic Analyzer (SOMMA) which was manufactured at the University of Rhode Island and standardized at the Brookhaven National Laboratory.
custom-designed titration
custom-designed titration
PI Supplied Instrument Name: custom-designed titration PI Supplied Instrument Description:The shipboard TA analysis by single step titration was done using spectrophotometry with a single acid addition procedure using a custom-made system (Nippon ANS, Inc., Japan). Land-based TA was performed with a custom-designed titration designed and built by the laboratory of Andrew G. Dickson (University of California, San Diego) as described in Dickson et al. (2003). 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: MR23-06C
MR23-06C
R/V Mirai
R/V Mirai
vessel
MR23-06C
https://www.godac.jamstec.go.jp/darwin_cruise/metadata/d73ac6eb-52b4-4235-bab4-122d01efc7cd/MR23-06C_summary_eng.pdf
Report describing MR23-06C
Cruise: MR23-07
MR23-07
R/V Mirai
R/V Mirai
vessel
MR23-07
https://cchdo.ucsd.edu/cruise/49NZ20231006
Report describing MR23-07
R/V Mirai
R/V Mirai
vessel