http://lod.bco-dmo.org/id/dataset/943994
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
2024-11-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Houston Galveston Bay Carbonate from the Hurricane Harvey Texas Lagoons project
2024-11-19
publication
2024-11-19
revision
BCO-DMO Linked Data URI
2024-11-19
creation
http://lod.bco-dmo.org/id/dataset/943994
Hui Liu
Texas A&M, Galveston
principalInvestigator
Xinping Hu
Texas A&M, Corpus Christi
principalInvestigator
Larissa Marie Dias
Texas A&M, Corpus Christi
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: Liu, H., Hu, X., Dias, L. M. (2024) Houston Galveston Bay Carbonate. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-11-19 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/943994 [access date]
Methods and Sampling: <p><strong>Field Sampling</strong></p>
<p>Galveston Bay is a semi-enclosed microtidal estuary located in the NWGOM (Montagna et al., 2013). With an average water depth of 3 m and a surface area covering 1,554 km², Galveston Bay is the seventh-largest estuary in the U.S. and the second-largest estuary on the Texas coast (Bass et al., 2018; Morse et al., 1993; Solis &amp; Powell, 1999). Galveston Bay receives freshwater from the Trinity River, San Jacinto River, Clear Creek, and smaller bayous and creeks, with the Trinity River providing 70% of the freshwater entering the Bay (Bass et al., 2018; Dellapenna et al., 2020; Morse et al., 1993; Solis &amp; Powell, 1999). The Bolivar Peninsula and Galveston Island separate Galveston Bay from the GOM, with the exchange of water between the Bay and the GOM occurring through Bolivar Roads, i.e., the mouth of the Bay (Glass et al., 2008; Morse et al., 1993).</p>
<p>Monthly cruises were conducted between October 2017 and September 2018 onboard the R/V Trident. Timing of the study allowed for the examination of the factors regulating CO₂ flux over the course of a year following Hurricane Harvey in late August 2017. Although the study began more than 45 days (the residence time of the Bay) after Harvey, salinity recovery of the Bay was likely still ongoing in the inner and middle sections of the Bay (Du &amp; Park, 2019; Du et al., 2019).</p>
<p>During each monthly survey, a transect was run between five water sampling stations, extending northwest from the Bay mouth (Station 1) opening to the Five Mile Marker on the Houston Ship Channel (Station 5). One offshore cruise in the NWGOM outside Galveston Bay was conducted in October 2018. At each station, surface (~0.5 m below water surface) and bottom water (~0.5 m above the sediment) samples for carbonate analyses were collected. A van Dorn sampler was used to collect unfiltered surface and bottom water into 250 mL borosilicate glass bottles for total alkalinity (TA), dissolved inorganic carbon (DIC), and pH analyses. A total of 100 μL saturated HgCl₂ was added to each water sample to cease biological activity, and bottle stoppers were replaced following the application of Apiezon® grease and secured with rubber bands and hose clamps. The samples were stored at 4 °C in the dark until analyses, usually within 2–3 weeks of sample collection. Surface and bottom unpreserved water samples were collected in 125 mL polypropylene bottles for Ca²⁺ analysis.</p>
<p><strong>Discrete Sample Analyses</strong></p>
<p>Water samples collected at the surface and bottom at each station were analyzed for DIC, TA, pH, and salinity (Dickson et al., 2003; Bass et al., 2018). DIC was analyzed by acidifying 0.5 mL water samples with 0.5 mL 10% H₃PO₄ using a 2.5 mL syringe pump on an AS-C3 DIC analyzer (Apollo SciTech Inc.) with a precision of ±0.1%. TA was analyzed at 22.0 ± 0.1 °C using Gran titration of a 25 mL water sample with 0.1 M HCl solution (in 0.5 M NaCl) on an AS-Alk2 alkalinity titrator (Apollo SciTech Inc.), with a precision of ±0.1%. Precisions were estimated based on randomly collected duplicate samples. Reference Material (RM) produced in the lab of Andrew Dickson at Scripps was used in both TA and DIC analysis to ensure data quality (Dickson et al., 2003).</p>
<p>A spectrophotometric method with a precision of ±0.0004 and purified m-cresol purple (mCP) obtained from Dr. Robert Byrne’s lab (University of South Florida) (Liu et al., 2011) was used for pH (on the total scale) analysis (Carter et al., 2013). Prior to each sample analysis, a calibrated Orion™ Ross™ glass electrode was used to adjust the indicator to pH 7.92 ± 0.01. A 10 cm water-jacketed absorbance cell for pH measurements (Carter et al., 2013) was kept at 25 ± 0.01 °C. Consecutive runs were done for each sample whereby two volumes (30 μL and 60 μL) of mCP were added to correct the dye effect (Clayton &amp; Byrne, 1993). Equations from Liu et al. (2011) were used when salinity was greater than 20 for the entirety of a sampling trip, and equations from Douglas and Byrne (2017), which allow for a wider salinity range (0–40 vs. 20–40) (Douglas &amp; Byrne, 2017), were used when salinity was less than 20 for an entire sampling trip for pH calculations. Calculated pH values (on the total scale) were converted to in situ temperature using the program CO2SYS with DIC as the other input parameter.</p>
<p>Salinity was measured with a benchtop salinometer (Orion Star™ A12, Thermo Scientific), which was calibrated using Milli-Q water and known salinity CRM seawater before each sample analysis. Calcium ([Ca²⁺]) concentration was measured using automatic potentiometric titration with ethylene glycol tetraacetic acid (EGTA), with a precision of ±0.2% (Kanamori &amp; Ikegami, 1980). A Metrohm® Titrando calcium-selective electrode on a titration system (Metrohm Titrando 888) was used to detect the endpoint.</p>
<p><strong>Meteorological Data</strong></p>
<p>United States Geological Survey (USGS, 2021) streamgages for the Trinity River (gage #08066500) and San Jacinto River, east fork (SJE; gage #08070200) and west fork (SJW; gage #08068000), were used to obtain freshwater discharge. These stations were identified as the closest gages to the mouths of the rivers having complete discharge data for the study period. Discharges of less than or equal to 45 days (residence time of the Bay) prior to flux estimates were utilized (Morse et al., 1993; Solis &amp; Powell, 1999). The Texas Commission on Environmental Quality (TCEQ, 2022) performs routine water quality monitoring, and TCEQ water sampling stations were used for river endmember values from the San Jacinto (average of west fork station #11243 and east fork station #11238) and Trinity (station #10896) rivers. River endmember DIC was calculated from TA and pH measurements using K₁ and K₂ constants from Millero (2010) and pH values on the NBS scale. Seasonally weighted averages were calculated by summing the TA or DIC concentration multiplied by daily discharge values for all river measurements of that season and dividing by the sum of all discharge values for all river measurements of that season (using meteorological seasons).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1760006 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1760006
onGoing
Hui Liu
Texas A&M, Galveston
409-740-4716
P.O. Box 1675
Galveston
TX
777553
USA
liuh@tamug.edu
pointOfContact
Xinping Hu
Texas A&M, Corpus Christi
361-825-3395
The University of Texas at Austin Department of Marine Science
Austin
TX
USA
xinping.hu@austin.utexas.edu
pointOfContact
Larissa Marie Dias
Texas A&M, Corpus Christi
lmdias@uw.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
AS-Alk2 alkalinity titrator (Apollo SciTech Inc.)
AS-C3 DIC analyzer (Apollo SciTech Inc.)
Benchtop Salinometer (OrionStar A12, Thermo Scientific)
Spectrophotometric Method
Titration System (Metrohm Titrando 888)
theme
None, User defined
Apollo SciTech AS-ALK2 total alkalinity titrator
Apollo SciTech AS-C3 Dissolved Inorganic Carbon (DIC) analyzer
Salinometer
Spectrophotometer
Titrator
instrument
BCO-DMO Standard Instruments
Galveston_Bay_Cruises
service
Deployment Activity
Galveston Bay, an estuary situated along the northwestern 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.
RAPID: Capturing the Signature of Hurricane Harvey on Texas Coastal Lagoons
https://osprey.bco-dmo.org/project/783256
RAPID: Capturing the Signature of Hurricane Harvey on Texas Coastal Lagoons
<p><em>NSF Award Abstract:</em><br />
Hurricane Harvey made landfall Friday 25 August 2017 about 30 miles northeast of Corpus Christi, Texas as a Category 4 hurricane with winds up to 130 mph. This is the strongest hurricane to hit the middle Texas coast since Carla in 1961. After the wind storm and storm surge, coastal flooding occurred due to the storm lingering over Texas for four more days, dumping as much as 50 inches of rain near Houston. This will produce one of the largest floods ever to hit the Texas coast, and it is estimated that the flood will be a one in a thousand year event. The Texas coast is characterized by lagoons behind barrier islands, and their ecology and biogeochemistry are strongly influenced by coastal hydrology. Because this coastline is dominated by open water systems and productivity is driven by the amount of freshwater inflow, Hurricane Harvey represents a massive inflow event that will likely cause tremendous changes to the coastal environments. Therefore, questions arise regarding how biogeochemical cycles of carbon, nutrients, and oxygen will be altered, whether massive phytoplankton blooms will occur, whether estuarine species will die when these systems turn into lakes, and how long recovery will take? The investigators are uniquely situated to mount this study not only because of their location, just south of the path of the storm, but most importantly because the lead investigator has conducted sampling of these bays regularly for the past thirty years, providing a tremendous context in which to interpret the new data gathered. The knowledge gained from this study will provide a broader understanding of the effects of similar high intensity rainfall events, which are expected to increase in frequency and/or intensity in the future.</p>
<p>The primary research hypothesis is that: Increased inflows to estuaries will cause increased loads of inorganic and organic matter, which will in turn drive primary production and biological responses, and at the same time significantly enhance respiration of coastal blue carbon. A secondary hypothesis is that: The large change in salinity and dissolved oxygen deficits will kill or stress many estuarine and marine organisms. To test these hypotheses it is necessary to measure the temporal change in key indicators of biogeochemical processes, and biodiversity shifts. Thus, changes to the carbon, nitrogen and oxygen cycles, and the diversity of benthic organisms will be measured and compared to existing baselines. The PIs propose to sample the Lavaca-Colorado, Guadalupe, Nueces, and Laguna Madre estuaries as follows: 1) continuous sampling (via autonomous instruments) of salinity, temperature, pH, dissolved oxygen, and depth (i.e. tidal elevation); 2) bi-weekly to monthly sampling for dissolved and total organic carbon and organic nitrogen, carbonate system parameters, nutrients, and phytoplankton community composition; 3) quarterly measurements of sediment characteristics and benthic infauna. The project will support two graduate students. The PIs will communicate results to the public and to state agencies through existing collaborations.</p>
Hurricane Harvey Texas Lagoons
largerWorkCitation
project
eng; USA
oceans
Galveston Bay, an estuary situated along the northwestern Gulf of Mexico
-94.931
-94.752
29.358
29.61
2017-10-21
2018-09-16
Northwest Gulf of Mexico estuaries on Texas Coast
0
BCO-DMO catalogue of parameters from Houston Galveston Bay Carbonate from the Hurricane Harvey Texas Lagoons 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
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://osprey.bco-dmo.org/dataset/943994/data/download
download
onLine
dataset
<p><strong>Field Sampling</strong></p>
<p>Galveston Bay is a semi-enclosed microtidal estuary located in the NWGOM (Montagna et al., 2013). With an average water depth of 3 m and a surface area covering 1,554 km², Galveston Bay is the seventh-largest estuary in the U.S. and the second-largest estuary on the Texas coast (Bass et al., 2018; Morse et al., 1993; Solis &amp; Powell, 1999). Galveston Bay receives freshwater from the Trinity River, San Jacinto River, Clear Creek, and smaller bayous and creeks, with the Trinity River providing 70% of the freshwater entering the Bay (Bass et al., 2018; Dellapenna et al., 2020; Morse et al., 1993; Solis &amp; Powell, 1999). The Bolivar Peninsula and Galveston Island separate Galveston Bay from the GOM, with the exchange of water between the Bay and the GOM occurring through Bolivar Roads, i.e., the mouth of the Bay (Glass et al., 2008; Morse et al., 1993).</p>
<p>Monthly cruises were conducted between October 2017 and September 2018 onboard the R/V Trident. Timing of the study allowed for the examination of the factors regulating CO₂ flux over the course of a year following Hurricane Harvey in late August 2017. Although the study began more than 45 days (the residence time of the Bay) after Harvey, salinity recovery of the Bay was likely still ongoing in the inner and middle sections of the Bay (Du &amp; Park, 2019; Du et al., 2019).</p>
<p>During each monthly survey, a transect was run between five water sampling stations, extending northwest from the Bay mouth (Station 1) opening to the Five Mile Marker on the Houston Ship Channel (Station 5). One offshore cruise in the NWGOM outside Galveston Bay was conducted in October 2018. At each station, surface (~0.5 m below water surface) and bottom water (~0.5 m above the sediment) samples for carbonate analyses were collected. A van Dorn sampler was used to collect unfiltered surface and bottom water into 250 mL borosilicate glass bottles for total alkalinity (TA), dissolved inorganic carbon (DIC), and pH analyses. A total of 100 μL saturated HgCl₂ was added to each water sample to cease biological activity, and bottle stoppers were replaced following the application of Apiezon® grease and secured with rubber bands and hose clamps. The samples were stored at 4 °C in the dark until analyses, usually within 2–3 weeks of sample collection. Surface and bottom unpreserved water samples were collected in 125 mL polypropylene bottles for Ca²⁺ analysis.</p>
<p><strong>Discrete Sample Analyses</strong></p>
<p>Water samples collected at the surface and bottom at each station were analyzed for DIC, TA, pH, and salinity (Dickson et al., 2003; Bass et al., 2018). DIC was analyzed by acidifying 0.5 mL water samples with 0.5 mL 10% H₃PO₄ using a 2.5 mL syringe pump on an AS-C3 DIC analyzer (Apollo SciTech Inc.) with a precision of ±0.1%. TA was analyzed at 22.0 ± 0.1 °C using Gran titration of a 25 mL water sample with 0.1 M HCl solution (in 0.5 M NaCl) on an AS-Alk2 alkalinity titrator (Apollo SciTech Inc.), with a precision of ±0.1%. Precisions were estimated based on randomly collected duplicate samples. Reference Material (RM) produced in the lab of Andrew Dickson at Scripps was used in both TA and DIC analysis to ensure data quality (Dickson et al., 2003).</p>
<p>A spectrophotometric method with a precision of ±0.0004 and purified m-cresol purple (mCP) obtained from Dr. Robert Byrne’s lab (University of South Florida) (Liu et al., 2011) was used for pH (on the total scale) analysis (Carter et al., 2013). Prior to each sample analysis, a calibrated Orion™ Ross™ glass electrode was used to adjust the indicator to pH 7.92 ± 0.01. A 10 cm water-jacketed absorbance cell for pH measurements (Carter et al., 2013) was kept at 25 ± 0.01 °C. Consecutive runs were done for each sample whereby two volumes (30 μL and 60 μL) of mCP were added to correct the dye effect (Clayton &amp; Byrne, 1993). Equations from Liu et al. (2011) were used when salinity was greater than 20 for the entirety of a sampling trip, and equations from Douglas and Byrne (2017), which allow for a wider salinity range (0–40 vs. 20–40) (Douglas &amp; Byrne, 2017), were used when salinity was less than 20 for an entire sampling trip for pH calculations. Calculated pH values (on the total scale) were converted to in situ temperature using the program CO2SYS with DIC as the other input parameter.</p>
<p>Salinity was measured with a benchtop salinometer (Orion Star™ A12, Thermo Scientific), which was calibrated using Milli-Q water and known salinity CRM seawater before each sample analysis. Calcium ([Ca²⁺]) concentration was measured using automatic potentiometric titration with ethylene glycol tetraacetic acid (EGTA), with a precision of ±0.2% (Kanamori &amp; Ikegami, 1980). A Metrohm® Titrando calcium-selective electrode on a titration system (Metrohm Titrando 888) was used to detect the endpoint.</p>
<p><strong>Meteorological Data</strong></p>
<p>United States Geological Survey (USGS, 2021) streamgages for the Trinity River (gage #08066500) and San Jacinto River, east fork (SJE; gage #08070200) and west fork (SJW; gage #08068000), were used to obtain freshwater discharge. These stations were identified as the closest gages to the mouths of the rivers having complete discharge data for the study period. Discharges of less than or equal to 45 days (residence time of the Bay) prior to flux estimates were utilized (Morse et al., 1993; Solis &amp; Powell, 1999). The Texas Commission on Environmental Quality (TCEQ, 2022) performs routine water quality monitoring, and TCEQ water sampling stations were used for river endmember values from the San Jacinto (average of west fork station #11243 and east fork station #11238) and Trinity (station #10896) rivers. River endmember DIC was calculated from TA and pH measurements using K₁ and K₂ constants from Millero (2010) and pH values on the NBS scale. Seasonally weighted averages were calculated by summing the TA or DIC concentration multiplied by daily discharge values for all river measurements of that season and dividing by the sum of all discharge values for all river measurements of that season (using meteorological seasons).</p>
Specified by the Principal Investigator(s)
<p><strong>Carbonate Speciation and Saturation State Calculations</strong></p>
<p>Carbonate speciation was calculated under field conditions (temperature and pressure) using the Excel® version of the CO2SYS program (Lewis &amp; Wallace, 1998) based on DIC and lab-measured pH (at 25 °C) from discrete samples. Carbonic acid dissociation constants (K1, K2) from Millero (2010), the bisulfate dissociation constant from Dickson (1990), the dissociation constant of HF (KF) from Dickson and Riley (1979), and total boron concentration from Uppström (1974) were used.</p>
<p>The CO2SYS output for carbonate saturation state with respect to aragonite (ΩAr, CO2SYS) was corrected using the measured Ca²⁺ concentration, which exhibited a near-linear relationship with salinity (R² = 0.96). This correction was necessary for the estuary due to the non-zero calcium concentration of the riverine endmember. The corrected aragonite saturation state (ΩAr) was calculated as:</p>
<p class="rtecenter">Corrected ΩAr = (ΩAr, CO2SYS) × ([Ca²⁺ measured] / [Ca²⁺ theoretical])</p>
<p>Where:</p>
<ul>
<li>[Ca²⁺ measured] is the calcium concentration measured directly.</li>
<li>[Ca²⁺ theoretical] is the theoretical calcium concentration based on salinity as calculated in the CO2SYS program.</li>
</ul>
Specified by the Principal Investigator(s)
- Units and special characters removed from parameter names
- Spaces in parameter names replaced with underscores ("_")
- The original submitted primary data file was an Excel file containing a "Metadata" tab and "Data" tab; the "Data" tab is served in this dataset as the primary data table and the content from the "Metadata" tab informs the parameter details of this dataset
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
AS-Alk2 alkalinity titrator (Apollo SciTech Inc.)
AS-Alk2 alkalinity titrator (Apollo SciTech Inc.)
PI Supplied Instrument Name: AS-Alk2 alkalinity titrator (Apollo SciTech Inc.) PI Supplied Instrument Description:Total Alkalinity measurements were made with an AS-Alk2 alkalinity titrator (Apollo SciTech Inc.) and analyzed at 22.0+/-0.1 deg.C using gran titration of a 25 mL water sample with 0.1 M Hal solution (in 0.5 M NaCl), with a precision of +/-0.1%. 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.
AS-C3 DIC analyzer (Apollo SciTech Inc.)
AS-C3 DIC analyzer (Apollo SciTech Inc.)
PI Supplied Instrument Name: AS-C3 DIC analyzer (Apollo SciTech Inc.) PI Supplied Instrument Description:Dissolved Inorganic Carbon (DIC) measurements were performed with an AS-C3 DIC analyzer (Apollo SciTech Inc.) and analyzed by acidifying 0.5 mL water samples with 0.5 mL 10% H3PO4 using a 2.5 mL syringe pump, with a precision of +/-0.1%. Instrument Name: Apollo SciTech AS-C3 Dissolved Inorganic Carbon (DIC) analyzer Instrument Short Name:Apollo SciTech AS-C3 Instrument Description: A Dissolved Inorganic Carbon (DIC) analyzer, for use in aquatic carbon dioxide parameter analysis of coastal waters, sediment pore-waters, and time-series incubation samples. The analyzer consists of a solid state infrared CO2 detector, a mass-flow controller, and a digital pump for transferring accurate amounts of reagent and sample. The analyzer uses an electronic cooling system to keep the reactor temperature below 3 degrees Celsius, and a Nafion dry tube to reduce the water vapour and keep the analyzer drift-free and maintenance-free for longer. The analyzer can handle sample volumes from 0.1 - 1.5 milliliters, however the best results are obtained from sample volumes between 0.5 - 1 milliliters. It takes approximately 3 minutes per analysis, and measurement precision is plus or minus 2 micromoles per kilogram or higher for surface seawater. It is designed for both land based and shipboard laboratory use.
Benchtop Salinometer (OrionStar A12, Thermo Scientific)
Benchtop Salinometer (OrionStar A12, Thermo Scientific)
PI Supplied Instrument Name: Benchtop Salinometer (OrionStar A12, Thermo Scientific) PI Supplied Instrument Description:Salinity was measured with a benchtop salinometer (Orion StarTM A12, Thermo Scientific), which was calibrated using MilliQ water and known salinity CRM seawater before each sample analysis. Calcium ([Ca2+]) concentration was measured using automatic potentiometric titration with ethylene glycol tetraacetic acid (EGTA), with a precision of ±0.2% [59]. A Metrohm® Titrando calcium-selective electrode on a titration system (Metrohm Titrando 888) was used to detect the endpoint. Instrument Name: Salinometer Instrument Short Name:Salinometer Instrument Description: A salinometer is a device designed to measure the salinity, or dissolved salt content, of a solution.
Spectrophotometric Method
Spectrophotometric Method
PI Supplied Instrument Name: Spectrophotometric Method PI Supplied Instrument Description:pH was analyzed using the spectrophotometric method and purified m-cresol purple (mCP) obtained from Dr. Robert Byrne's lab (University of South Florida), and was analyzed on the total scale with a precision of +/-0.0004. Prior to analyses, a calibrated OrionRoss glass electrode was used to adjust the indicator to pH 7.92+/-0.01, and a 10 cm water-jacketed absorbance cell of pH was kept at 25+/-0.01 deg.C. 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/
Titration System (Metrohm Titrando 888)
Titration System (Metrohm Titrando 888)
PI Supplied Instrument Name: Titration System (Metrohm Titrando 888) PI Supplied Instrument Description:Calcium [Ca2+] concentration measurements were made with a Metrohm Titrando calcium-selective electrode on a titration system (Metrohm Titrando 888) and measured using automatic potentiometric titration with ethylene glycol tetra acetic acid (EGTA), with a precision of +/-0.2% 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: Galveston_Bay_Cruises
Galveston_Bay_Cruises
R/V Trident
R/V Trident
vessel
Galveston_Bay_Cruises
Xinping Hu
University of Texas - Marine Science Institute
R/V Trident
R/V Trident
vessel