http://lod.bco-dmo.org/id/dataset/905357
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
2023-08-01
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Measured pH and nutrient data acquired during the pH internal consistency experiment.
2023-08-01
publication
2023-08-01
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2023-08-02
publication
https://doi.org/10.26008/1912/bco-dmo.905357.1
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. (2023) Measured pH and nutrient data acquired during the pH internal consistency experiment. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-08-01 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.905357.1 [access date]
Measured pH and nutrients Dataset Description: Methods and Sampling: <p>This table is a summary table of the pH internal consistency experiment, averaging raw values from related datasets.</p>
<p>Measured total alkalinity and measured DIC are averages from the related dataset "pH internal Consistency Experiment: TA &amp; DIC".</p>
<p>The measured pHt are average pHt for each temperature. Values were extrapolated to zero indicator added as described in Woosley 2021 and Woosley and Moon 2023. Raw measurements can be found in the related datatset "pH internal Consistency Experiment: Raw pH Data".&nbsp;</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1923312 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1923312
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: 1
Unknown
Batch
Practical_Salinity
Temp
meas_pHt
pHt_std_err
meas_TA
TA_std
meas_DIC
DIC_std
equilibrator_pCO2
PO4
PO4_stdev
Si
Si_stdev
theme
None, User defined
sample identification
salinity
temperature of sample or a generic measurement (not in-situ water temp)
pH
standard error
total alkalinity (TA)
dissolved inorganic Carbon
Partial pressure of CO2
reactive phosphorus (PO4)
Silicon
featureType
BCO-DMO Standard Parameters
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.
Improving Accuracy and Precision of Marine Inorganic Carbon Measurements
https://osprey.bco-dmo.org/project/813194
Improving Accuracy and Precision of Marine Inorganic Carbon Measurements
<p><em>NSF Award Abstract:</em><br />
The oceans absorb about one third of the CO2 humans release into the atmosphere from the burning of fossil fuels and other activities. While ocean uptake of CO2 slows its rate of increase in the atmosphere, it comes with costs for the oceans and the organisms that live there. Once in seawater, CO2 reacts with water to produce bicarbonate and hydrogen ions. The increase in hydrogen ions lowers the pH in a process called ocean acidification. Not all areas of the ocean are affected equally. The solubility of CO2 is greater in the cold waters of the Arctic making them more prone to ocean acidification. However, due to the low temperatures and low salinities in the Arctic, the uncertainties in pH values are much larger there than for the other oceans. This project evaluates pH at low temperatures and salinities, and develops best practice recommendations to improve the ability to compare measurements among laboratory groups and studies and reduce overall uncertainty in the measurements. The project provides training for an undergraduate student and promotes awareness of ocean acidification through public outreach.</p>
<p>Having highly accurate and precise measurements are important for monitoring changes to pH and CO2 uptake through time and the effects on marine life. In order to improve pH measurements for polar waters, several different experiments will be conducted. The temperature dependence of pH will be determined from 30˚C to near freezing for low salinity waters. The results will be compared to current chemical models to quantify offsets and biases. Recommendations will be made for the best physical chemical model to use for low temperature and salinity seawater. Moreover, pH is measured spectrophotometrically using an indicator dye. Preparation and calibration of the indictor is important to standardize studies across space and time and ensure comparability. Indicator quality is essential for detecting ocean acidification, but its stability is currently unknown. If the dye degrades after production, biases or artifacts in pH measurements may result as the dye ages. Experiments will be undertaken using batches of dyes from weeks to over 10 years old to resolve its degradation characteristics. The experiments will establish how long a batch of dye remains valid once it is prepared without biasing the measurements. This is particularly important for long term studies such as extended research expeditions and autonomous systems where a batch of dye may be used over a year. Together, by both investigating the validity of chemical models for seawater pH at low temperature and salinity and examining the stability of the pH indicator dye, methodological uncertainties can be reduced to permit better monitoring of changes in global ocean 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>
Inorganic Carbon Meaurements
largerWorkCitation
project
eng; USA
oceans
-70.884417
-70.884417
39.773433
39.773433
2019-10-10
2019-10-10
Lab studies
0
BCO-DMO catalogue of parameters from Measured pH and nutrient data acquired during the pH internal consistency experiment.
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/905376.rdf
Name: Batch
Units: unitless
Description: <p>Seawater batch number</p>
http://lod.bco-dmo.org/id/dataset-parameter/905377.rdf
Name: Practical_Salinity
Units: unitless
Description: <p>Salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/905378.rdf
Name: Temp
Units: degrees Celsius (˚C)
Description: <p>Temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/905379.rdf
Name: meas_pHt
Units: unitless
Description: <p>measured pH on the total scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/905380.rdf
Name: pHt_std_err
Units: unitless
Description: <p>standard error of pHt</p>
http://lod.bco-dmo.org/id/dataset-parameter/905381.rdf
Name: meas_TA
Units: micromoles per kilogram (µmol/kg)
Description: <p>measured total alkalinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/905382.rdf
Name: TA_std
Units: micromoles per kilogram (µmol/kg)
Description: <p>standard deviation of total alkalinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/905383.rdf
Name: meas_DIC
Units: micromoles per kilogram (µmol/kg)
Description: <p>measured dissolved inorganic carbon</p>
http://lod.bco-dmo.org/id/dataset-parameter/905384.rdf
Name: DIC_std
Units: micromoles per kilogram (µmol/kg)
Description: <p>standard deviation of Dissolved inorganic carbon</p>
http://lod.bco-dmo.org/id/dataset-parameter/905385.rdf
Name: equilibrator_pCO2
Units: microatmospheres (µatm)
Description: <p>aproximate batch pCO2</p>
http://lod.bco-dmo.org/id/dataset-parameter/905386.rdf
Name: PO4
Units: micromoles per kilogram (µmol/kg)
Description: <p>reactive phosporus</p>
http://lod.bco-dmo.org/id/dataset-parameter/905387.rdf
Name: PO4_stdev
Units: micromoles per kilogram (µmol/kg)
Description: <p>standard deviation of reactive phosphorus</p>
http://lod.bco-dmo.org/id/dataset-parameter/905388.rdf
Name: Si
Units: micromoles per kilogram (µmol/kg)
Description: <p>reactive silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/905389.rdf
Name: Si_stdev
Units: micromoles per kilogram (µmol/kg)
Description: <p>standard deviatin of reactive silicate</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
18743
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/3e56b4ec-5dcc-47ec-be98-41412bc46ff2/content
download
https://doi.org/10.26008/1912/bco-dmo.905357.1
download
onLine
dataset
<p>This table is a summary table of the pH internal consistency experiment, averaging raw values from related datasets.</p>
<p>Measured total alkalinity and measured DIC are averages from the related dataset "pH internal Consistency Experiment: TA &amp; DIC".</p>
<p>The measured pHt are average pHt for each temperature. Values were extrapolated to zero indicator added as described in Woosley 2021 and Woosley and Moon 2023. Raw measurements can be found in the related datatset "pH internal Consistency Experiment: Raw pH Data".&nbsp;</p>
Specified by the Principal Investigator(s)
<p>Reactive phosphate and silicate for each batch was determined spectrophotometrically using the methods of Strickland and Parsons (1972) modified according to the protocols of NOAA NCEI&nbsp;(Intergovernmental Oceanographic Commission,1994, see related publications). Measurements were made in triplicate and averaged.</p>
<p>The pCO2 of each batch was monitored from the outflow gas during bottling using a LiCor 865. The value is the average (at room temperature) during bottling. Standard Operating Procedures were NOT followed and the accuracy of the values is unknown. They are provided for reference only and not intended for use in calculations.&nbsp;</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
* Adjusted headers to comply with database requirements
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