http://lod.bco-dmo.org/id/dataset/840678
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
2021-02-12
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Water column data from samples collected on R/V Hugh Sharp cruise HRS1709 in the Chesapeake Bay in August 2017
2021-02-17
publication
2021-02-17
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2021-02-19
publication
https://doi.org/10.26008/1912/bco-dmo.840678.1
George W. Luther
University of Delaware
principalInvestigator
Bradley M. Tebo
Oregon Health & Science University
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: Luther, G. W., Tebo, B. M. (2021) Water column data from samples collected on R/V Hugh Sharp cruise HRS1709 in the Chesapeake Bay in August 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-02-17 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.840678.1 [access date]
Water column Chesapeake Bay 2017 Dataset Description: Methods and Sampling: <p><strong><em>In situ </em></strong><strong>pump profiler cast</strong> refers to profiling with a pump profiler for O₂ and H₂S using solid state gold-amalgam electrodes for voltammetry (Luther et al, 2008; Analytical Instrument Systems DLK-60). Water was pumped aboard to make measurements on discrete samples for Mn and Fe speciation as well. See Hudson et al (2019) for more information.</p>
<p>Samples for Mn and Fe parameters were filtered through 0.20 um filters. Whatman track etched polycarbonate filters were soaked in 1M HCl for 1 week before rinsing and storage in DI.</p>
<p><strong>C parameters</strong> performed by Dr. Wei-Jun Cai's group for:<br />
TA - Open cell Gran titration with semi-automatic AS-ALK2 Apollo Scitech titrator;<br />
pH - glass electrode, NBS buffers;<br />
DIC - infrared CO₂ analyzer (AS-C3, Apollo Scitech).</p>
<p>Uses Dickson CRM for calibration. DIC/TA samples were filtered (0.45um) and fixed with 100 ul of saturated mercury bichloride. Uses the methods of Gran (1952) and Huang, et al. (2012).</p>
<p><strong>Dissolved Mn parameters:</strong><br />
The porphyrin spectrophotometric method of Madison et al (2011, 2013) measures dissolved Mn(II), Mn(III) bound to weaker ligands and total Mn. Method includes calibration and intercomparison of totals with other instrumentation (ICP, AA). Detection limit is 0.050 micromolar. Detection limit (DL) is 50 micromolar with a 1 cm path length cell.</p>
<p>Modification of Madison et al for Mn(III) bound to strong ligands by adding a reducing agent to a separate subsample with the porphyrin to obtain total Mn (Oldham 2015, 2017; Thibault de Chanvalon and Luther, 2019). Mn(III) bound to strong ligand complexes is determined by difference. Typically, triplicate measurements performed. Detection limit can be extended to 3.0 nanomolar with a 1m path length cell.</p>
<p>Modification of Madison et al. for water column samples by adding higher Cd(II) so that cadmium-chloride complex formation would not inhibit cadmium-porphyrin formation and thus incorporation of Mn into the porphyrin by Cd replacement (Thibault de Chanvalon and Luther, 2019, this work). This modification enhanced the kinetics of the reaction progress for both Mn(II) and weak Mn(III)-L complexes.</p>
<p><strong>MnO</strong>ₓ<strong> on unfiltered samples</strong><br />
The leucoberbelein blue method is that of Jones et al (2019, this work) in 1 cm cells, but can be modified for longer path length cells.</p>
<p><strong>H₂</strong><strong>S</strong><br />
O₂ and H₂S by the voltammetry method of Luther et al (2008) and Hudson et al (2019) using a flow cell. O₂ also from CTD sensor.</p>
<p><strong>Fe parameters</strong><br />
The method of Stookey (1972) is used to determine dissolved Fe(II) and on addition if hydroxylamine Fe total. Fe(III) is determined by difference. Modified and calibrated by many including Lewis et al (2007). Typically, triplicate measurements performed.</p>
<p><strong>Nitrite</strong><br />
Nitrite as determined by the method of Grasshoff (1983).</p>
<p><strong>Dissolved Mn speciation references:</strong><br />
Madison et al. (2011)<br />
Madison et al. (2013)<br />
Oldham et al. (2015)<br />
Oldham et al. (2017) - Here, we modified the method of Madison et al. (2011) for water column samples to achieve a detection limit of 3.0 nM (3 times the standard deviation of a blank) by using a 100-cm liquid waveguide capillary cell and the addition of a heating step as well as a strong reducing agent for Mn. Speciation [Mn³⁺ = Mn<sub>T</sub> – Mn²⁺]. As weak Mn(III)-L complexes could not be measured in our previous work (Oldham et al, 2015; paper above), this method was used throughout this cruise.<br />
Thibault de Chanvalon &amp; Luther (2019) - Here, we modified the method of Madison et al. (2011) for water column samples by adding higher Cd(II) so that cadmium-chloride complex formation would not inhibit cadmium-porphyrin formation and thus incorporation of Mn into the porphyrin by Cd replacement. This modification enhanced the kinetics of the reaction progress for both Mn(II) and weak Mn(III)-L complexes.</p>
<p><strong>Dissolved Fe speciation references:</strong><br />
Stookey (1970)<br />
Lewis et al. (2007)</p>
<p><strong>H2S (in situ voltammetry)– water column:</strong><br />
Luther et al. (2008)<br />
<br />
<strong>H2S (UV-Vis spectrophotometry) – sedimentary porewater samples:</strong><br />
Luther et al. (2011)</p>
<p><strong>MnOₓ<strong> </strong>solids:</strong><br />
Jones et al. (2019)</p>
<p><strong>pH and inorganic carbon parameters:</strong><br />
Gran (1952)<br />
Huang et al. (2012)</p>
<p><strong>Nitrite:</strong><br />
Determination of nitrite, nitrate, oxygen, thiosulphate in Grasshoff et al. (1983)</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1558738 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1558738
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1558692 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1558692
completed
George W. Luther
University of Delaware
302-645-4208
700 Pilottown Road School of Marine Science and Policy
Lewes
DE
19958
USA
luther@udel.edu
pointOfContact
Bradley M. Tebo
Oregon Health & Science University
503-346-3438
Division of Environmental and Biomolecular Systems 20000 NW Walker Road
Beaverton
OR
97006
USA
tebob@ohsu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Region
cruise
cast
sample
date
local_time_EST
ISO_DateTime_UTC
Latitude
Longitude
depth
temperature
salinity
CTD_O2
O2_100_pcnt_sat_at_T
pcnt_O2_sat
fluor_voltage
transmiss_voltage
H2S
TA
DIC
pH_NBS
pMnOx
dMn2plus
dMn2plus_stdev
dMn3plus
dMn3plus_stdev
dMnTotal
dMnTotal_stdev
dFe2plus
dFe2plus_stdev
pFe2plus
pFe2plus_stdev
dFeTotal
dFeTotal_stdev
pFeTotal
pFeTotal_stdev
dFe3plus
dFe3plus_stdev
pFe3plus
pFe3plus_stdev
Nitrite
Comments
infrared CO2 analyzer (AS-C3, Apollo Scitech)
In situ pump profiler
AS-ALK2 Apollo Scitech
theme
None, User defined
site
Cruise identfier
cast
sample identification
date
time of day
ISO_DateTime_UTC
latitude
longitude
depth
water temperature at measurement depth
salinity
dissolved Oxygen
O2 saturation
flvolt
light transmission (volts)
H2S
total alkalinity (TA)
dissolved inorganic Carbon
pH
Manganese
Iron
Nitrite
comments
featureType
BCO-DMO Standard Parameters
CO2 Analyzer
Pump
Titrator
instrument
BCO-DMO Standard Instruments
HRS1709
service
Deployment Activity
Chesapeake Bay
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: Transformations of soluble Mn(III) along horizontal and vertical oxygen gradients
https://osprey.bco-dmo.org/project/715477
Collaborative Research: Transformations of soluble Mn(III) along horizontal and vertical oxygen gradients
<p><em>NSF Award Abstract:</em><br />
Manganese (Mn) is an important trace nutrient for biological growth in marine organisms. In the past, all Mn dissolved in seawater was thought to exist in only one chemical form: Mn(II). Recent work in waters and sediments with little or no oxygen has shown that Mn(III) can be the dominant form of dissolved Mn and can even be present in oxygenated water if attached to specific organic molecules called ligands. This research will further investigate these discoveries, aiming to quantify the chemical and microbiological processes responsible for Mn(III) cycling under varying oxygen concentrations. The research will compare field sites in the Broadkill River wetland, the Chesapeake Bay, and the Lower St. Lawrence Estuary; measuring the water column and sediments known to have strong oxygen gradients and different organic carbon sources that could change the availability and binding strength of ligands that would stabilize dissolved Mn(III). In some chemical forms, Mn tends to act like iron, so this research may have broader implications by helping marine chemists to understand more about iron cycling in similar oxygen gradients. With growing concerns over diminished oxygen concentrations (hypoxia) in the ocean, and particularly in coastal regions, understanding the reactions of Mn(III) with organic ligands across oxygen gradients could become important for understanding Mn availability to organisms. The project includes support for the participation and mentoring of one graduate student and two postdoctoral researchers, and there will be a U.S.-Canada collaboration. A variety of public outreach activities are planned with a K-12 teacher to be selected as a participant on a research cruise.</p>
<p>Mn(III) has only recently been recognized as an important redox state for Mn in seawater. Previously, it was widely accepted that all Mn that passes through a 0.2 or 0.4 µm filter is dissolved Mn(II) while the retained portion is solid Mn(III, IV) oxide. Research in the Black Sea, the Baltic Sea, and the Chesapeake Bay has shown that soluble Mn(III) can be up to 100% of the dissolved Mn in the water column. Also, Mn(III) can exist as complexes with organic ligands in oxygenated seawater. This project will quantify and constrain the mechanisms surrounding weak and strong Mn(III) ligand transformations across vertical and horizontal oxygen gradients. Field sites to be studied include systems with a variety of organic carbon sources and oxygen dynamics: the Lower St. Lawrence Estuary, Chesapeake Bay, and Broadkill River wetland estuary. This research will continue to inform the fundamental shift that is taking place in our current understanding of Mn biogeochemistry in coastal systems. The results should also be applicable to redox processes involving Fe(III) ligand transformations, since Mn and Fe tend to exhibit similar redox chemistry under similar environmental conditions.</p>
Manganese3
largerWorkCitation
project
eng; USA
oceans
Chesapeake Bay
-76.3687
-76.3618
38.9764
38.9815
2017-08-04
2017-08-09
Broadkill River wetland, the Chesapeake Bay, the Lower St. Lawrence Estuary, and of 9deg 50' N East Pacific Rise
0
BCO-DMO catalogue of parameters from Water column data from samples collected on R/V Hugh Sharp cruise HRS1709 in the Chesapeake Bay in August 2017
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/840883.rdf
Name: Region
Units: unitless
Description: <p>Sampling location</p>
http://lod.bco-dmo.org/id/dataset-parameter/840884.rdf
Name: cruise
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/840885.rdf
Name: cast
Units: unitless
Description: <p>Cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/840886.rdf
Name: sample
Units: unitless
Description: <p>Bottle number or pump-profiler number</p>
http://lod.bco-dmo.org/id/dataset-parameter/840887.rdf
Name: date
Units: unitless
Description: <p>Date of sample collection; format: YYYY-MM-DD</p>
http://lod.bco-dmo.org/id/dataset-parameter/840888.rdf
Name: local_time_EST
Units: unitless
Description: <p>Time of sample collection in the local time zone (US Eastern Daylight); format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/840889.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time of sample collection (UTC/GMT) formatted to ISO8601 standard: YYYY-mm-ddTHH:MMZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/840890.rdf
Name: Latitude
Units: degrees North
Description: <p>Latitude in decimal degrees; positive values = North</p>
http://lod.bco-dmo.org/id/dataset-parameter/840891.rdf
Name: Longitude
Units: degrees East
Description: <p>Longitude in decimal degrees; negative value = West</p>
http://lod.bco-dmo.org/id/dataset-parameter/840892.rdf
Name: depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/840893.rdf
Name: temperature
Units: degrees Celsius
Description: <p>Water temperature from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/840894.rdf
Name: salinity
Units: PSU
Description: <p>Salinity from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/840895.rdf
Name: CTD_O2
Units: micromolar (uM)
Description: <p>O2 from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/840896.rdf
Name: O2_100_pcnt_sat_at_T
Units: micromolar (uM)
Description: <p>100% O2 sat at T</p>
http://lod.bco-dmo.org/id/dataset-parameter/840897.rdf
Name: pcnt_O2_sat
Units: unitless (percent)
Description: <p>Percent O2 saturation</p>
http://lod.bco-dmo.org/id/dataset-parameter/840898.rdf
Name: fluor_voltage
Units: volts
Description: <p>Fluorescence (chl) voltage</p>
http://lod.bco-dmo.org/id/dataset-parameter/840899.rdf
Name: transmiss_voltage
Units: volts
Description: <p>Transmissometry voltage</p>
http://lod.bco-dmo.org/id/dataset-parameter/840900.rdf
Name: H2S
Units: micromolar (uM)
Description: <p>H2S</p>
http://lod.bco-dmo.org/id/dataset-parameter/840901.rdf
Name: TA
Units: micromoles per kilogram (umol/kg)
Description: <p>TA</p>
http://lod.bco-dmo.org/id/dataset-parameter/840902.rdf
Name: DIC
Units: micromoles per kilogram (umol/kg)
Description: <p>DIC</p>
http://lod.bco-dmo.org/id/dataset-parameter/840903.rdf
Name: pH_NBS
Units: unitless
Description: <p>pH, NBS scale at 25 degrees C</p>
http://lod.bco-dmo.org/id/dataset-parameter/840904.rdf
Name: pMnOx
Units: micromolar (uM)
Description: <p>Particulate MnOx; particulate on the 0.20 micrometer filter; single measurement; detection limit = 0.01 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840905.rdf
Name: dMn2plus
Units: micromolar (uM)
Description: <p>Dissolved Mn2+; filtered through 0.20 micrometer filters; detection limit = 0.05 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840906.rdf
Name: dMn2plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dMn2plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840907.rdf
Name: dMn3plus
Units: micromolar (uM)
Description: <p>Dissolved Mn3+ by difference; Mn3+ = [MnT - Mn2+]; detection limit = 0.05 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840908.rdf
Name: dMn3plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dMn3plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840909.rdf
Name: dMnTotal
Units: micromolar (uM)
Description: <p>Mn total; filtered through 0.20 micrometer filters; detection limit = 0.05 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840910.rdf
Name: dMnTotal_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dMnTotal</p>
http://lod.bco-dmo.org/id/dataset-parameter/840911.rdf
Name: dFe2plus
Units: micromolar (uM)
Description: <p>Dissolved Fe2+; filtered through 0.20 micrometer filters; detection limit = 0.02 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840912.rdf
Name: dFe2plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dFe2plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840913.rdf
Name: pFe2plus
Units: micromolar (uM)
Description: <p>Particulate Fe2+; no filtering of water; detection limit = 0.02 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840914.rdf
Name: pFe2plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of pFe2plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840915.rdf
Name: dFeTotal
Units: micromolar (uM)
Description: <p>Dissolved Fe total = FeT = [Fe2+] + [Fe3+]; filtered through 0.20 micrometer filters; detection limit = 0.02 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840916.rdf
Name: dFeTotal_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dFeTotal</p>
http://lod.bco-dmo.org/id/dataset-parameter/840917.rdf
Name: pFeTotal
Units: micromolar (uM)
Description: <p>Particulate Fe total = FeT = [Fe2+] + [Fe3+]; no filtering of water; detection limit = 0.02 uM</p>
http://lod.bco-dmo.org/id/dataset-parameter/840918.rdf
Name: pFeTotal_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of pFeTotal</p>
http://lod.bco-dmo.org/id/dataset-parameter/840919.rdf
Name: dFe3plus
Units: micromolar (uM)
Description: <p>Dissolved Fe3+ by difference; Fe3+ = [FeT - Fe2+]</p>
http://lod.bco-dmo.org/id/dataset-parameter/840920.rdf
Name: dFe3plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of dFe3plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840921.rdf
Name: pFe3plus
Units: micromolar (uM)
Description: <p>Particulate Fe3+ by difference; Fe3+ = [FeT - Fe2+]</p>
http://lod.bco-dmo.org/id/dataset-parameter/840922.rdf
Name: pFe3plus_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of pFe3plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/840923.rdf
Name: Nitrite
Units: micromolar (uM)
Description: <p>Nitrite; single measurement; dissolved, filtered through 0.20 micrometer filters</p>
http://lod.bco-dmo.org/id/dataset-parameter/840924.rdf
Name: Comments
Units: unitless
Description: <p>Notes/comments about the sampling events</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
25490
https://darchive.mblwhoilibrary.org/bitstream/1912/26710/1/dataset-840678_water-column-chesapeake-bay-2017__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.840678.1
download
onLine
dataset
<p><strong><em>In situ </em></strong><strong>pump profiler cast</strong> refers to profiling with a pump profiler for O₂ and H₂S using solid state gold-amalgam electrodes for voltammetry (Luther et al, 2008; Analytical Instrument Systems DLK-60). Water was pumped aboard to make measurements on discrete samples for Mn and Fe speciation as well. See Hudson et al (2019) for more information.</p>
<p>Samples for Mn and Fe parameters were filtered through 0.20 um filters. Whatman track etched polycarbonate filters were soaked in 1M HCl for 1 week before rinsing and storage in DI.</p>
<p><strong>C parameters</strong> performed by Dr. Wei-Jun Cai's group for:<br />
TA - Open cell Gran titration with semi-automatic AS-ALK2 Apollo Scitech titrator;<br />
pH - glass electrode, NBS buffers;<br />
DIC - infrared CO₂ analyzer (AS-C3, Apollo Scitech).</p>
<p>Uses Dickson CRM for calibration. DIC/TA samples were filtered (0.45um) and fixed with 100 ul of saturated mercury bichloride. Uses the methods of Gran (1952) and Huang, et al. (2012).</p>
<p><strong>Dissolved Mn parameters:</strong><br />
The porphyrin spectrophotometric method of Madison et al (2011, 2013) measures dissolved Mn(II), Mn(III) bound to weaker ligands and total Mn. Method includes calibration and intercomparison of totals with other instrumentation (ICP, AA). Detection limit is 0.050 micromolar. Detection limit (DL) is 50 micromolar with a 1 cm path length cell.</p>
<p>Modification of Madison et al for Mn(III) bound to strong ligands by adding a reducing agent to a separate subsample with the porphyrin to obtain total Mn (Oldham 2015, 2017; Thibault de Chanvalon and Luther, 2019). Mn(III) bound to strong ligand complexes is determined by difference. Typically, triplicate measurements performed. Detection limit can be extended to 3.0 nanomolar with a 1m path length cell.</p>
<p>Modification of Madison et al. for water column samples by adding higher Cd(II) so that cadmium-chloride complex formation would not inhibit cadmium-porphyrin formation and thus incorporation of Mn into the porphyrin by Cd replacement (Thibault de Chanvalon and Luther, 2019, this work). This modification enhanced the kinetics of the reaction progress for both Mn(II) and weak Mn(III)-L complexes.</p>
<p><strong>MnO</strong>ₓ<strong> on unfiltered samples</strong><br />
The leucoberbelein blue method is that of Jones et al (2019, this work) in 1 cm cells, but can be modified for longer path length cells.</p>
<p><strong>H₂</strong><strong>S</strong><br />
O₂ and H₂S by the voltammetry method of Luther et al (2008) and Hudson et al (2019) using a flow cell. O₂ also from CTD sensor.</p>
<p><strong>Fe parameters</strong><br />
The method of Stookey (1972) is used to determine dissolved Fe(II) and on addition if hydroxylamine Fe total. Fe(III) is determined by difference. Modified and calibrated by many including Lewis et al (2007). Typically, triplicate measurements performed.</p>
<p><strong>Nitrite</strong><br />
Nitrite as determined by the method of Grasshoff (1983).</p>
<p><strong>Dissolved Mn speciation references:</strong><br />
Madison et al. (2011)<br />
Madison et al. (2013)<br />
Oldham et al. (2015)<br />
Oldham et al. (2017) - Here, we modified the method of Madison et al. (2011) for water column samples to achieve a detection limit of 3.0 nM (3 times the standard deviation of a blank) by using a 100-cm liquid waveguide capillary cell and the addition of a heating step as well as a strong reducing agent for Mn. Speciation [Mn³⁺ = Mn<sub>T</sub> – Mn²⁺]. As weak Mn(III)-L complexes could not be measured in our previous work (Oldham et al, 2015; paper above), this method was used throughout this cruise.<br />
Thibault de Chanvalon &amp; Luther (2019) - Here, we modified the method of Madison et al. (2011) for water column samples by adding higher Cd(II) so that cadmium-chloride complex formation would not inhibit cadmium-porphyrin formation and thus incorporation of Mn into the porphyrin by Cd replacement. This modification enhanced the kinetics of the reaction progress for both Mn(II) and weak Mn(III)-L complexes.</p>
<p><strong>Dissolved Fe speciation references:</strong><br />
Stookey (1970)<br />
Lewis et al. (2007)</p>
<p><strong>H2S (in situ voltammetry)– water column:</strong><br />
Luther et al. (2008)<br />
<br />
<strong>H2S (UV-Vis spectrophotometry) – sedimentary porewater samples:</strong><br />
Luther et al. (2011)</p>
<p><strong>MnOₓ<strong> </strong>solids:</strong><br />
Jones et al. (2019)</p>
<p><strong>pH and inorganic carbon parameters:</strong><br />
Gran (1952)<br />
Huang et al. (2012)</p>
<p><strong>Nitrite:</strong><br />
Determination of nitrite, nitrate, oxygen, thiosulphate in Grasshoff et al. (1983)</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
NM is used to indicate sensor not available or no measurement. BDL indicates measurements below the detection limit. Refer to parameter definitions for detection limits.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- converted date field to YYYY-MM-DD format;<br />
- added date/time column in ISO8601 format (UTC/GMT);<br />
- converted latitude and longitude to decimal degrees from degrees and decimal minutes.</p>
Specified by the Principal Investigator(s)
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
infrared CO2 analyzer (AS-C3, Apollo Scitech)
infrared CO2 analyzer (AS-C3, Apollo Scitech)
PI Supplied Instrument Name: infrared CO2 analyzer (AS-C3, Apollo Scitech) 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/
In situ pump profiler
In situ pump profiler
PI Supplied Instrument Name: In situ pump profiler PI Supplied Instrument Description:Profiling was conducted with a pump profiler for using solid state gold-amalgam electrodes for voltammetry (Luther et al, 2008; Analytical Instrument Systems DLK-60). See Hudson et al (2019), doi: 10.1016/j.talanta.2019.02.076. Instrument Name: Pump Instrument Short Name: Instrument Description: A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps
AS-ALK2 Apollo Scitech
AS-ALK2 Apollo Scitech
PI Supplied Instrument Name: AS-ALK2 Apollo Scitech 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: HRS1709
HRS1709
R/V Hugh R. Sharp
Community Standard Description
International Council for the Exploration of the Sea
R/V Hugh R. Sharp
vessel
HRS1709
George W. Luther
University of Delaware
R/V Hugh R. Sharp
Community Standard Description
International Council for the Exploration of the Sea
R/V Hugh R. Sharp
vessel