14:I[71133,["4507","static/chunks/e2799680-446c489506865058.js","7665","static/chunks/7665-81c5407bc4489ff9.js","8500","static/chunks/8500-e4dd1cb1bb626827.js","9753","static/chunks/9753-028c0a26aa71f2d4.js","8437","static/chunks/8437-a09d0b83fcec76af.js","4557","static/chunks/4557-64c5efa221bc528f.js","947","static/chunks/947-410627998426400f.js","5357","static/chunks/5357-6142894e88cb7da2.js","8382","static/chunks/app/dataset/%5Bid%5D/data/view/page-177ea8adea7aed86.js"],"default"] 15:T1277,

Water from desired depths was collected by pumping water through Norprene tubing (MasterFlex) via a peristaltic pump directly into acid-cleaned bottles. Before sampling a given depth, excess water the tubing was flushed by pumping through excess water. The samples were collected at discrete depth intervals at a single location within the pond. The samples were collected at temporal intervals intended to understand seasonal changes in pond chemistry. Samples collected for iodine analyses were filtered at 0.2µm with Sterivex filters and collected in 125ml or 60ml amber Nalgene bottles and were frozen immediately afterwards for iodine preservation (Campos, 1997). Iodine speciation analyses occurred within 1 year of sampling, mostly much sooner.

Glass columns for separating iodine species were washed by ultra-pure water produced from the Milli-Q^® water purification system, followed by packing with PYREX glass wool and 1ml of Bio-rad AG ^®1-X8 anion exchange resin. During the chromatography procedure, the I^- fraction is specifically adsorbed onto the surface of the resin and eluted following the addition of a 2M HNO₃ (Fisher Scientific, TraceMetal^TM Grade)-18% (v/v) Tetramethylammonium hydroxide (TMAH, Fisher Scientific) solution. The eluent containing IO₃^- and DOI fractions were collected separately during the elution steps prior to the I^- collection, followed by an acidification (pH <2) and reduction step which converts iodine to I^- by the addition of concentrated hydrochloric acid (HCl, Fisher Scientific) and sodium metabisulfite (Na₂S₂O₅, VWR Analytical) (Hardisty et al., 2020). The treated eluent was left overnight for reaction and was processed through the same chromatographic procedure to collect the I^- derived from the IO₃^- and DOI fractions. For independent measurement of total dissolved iodine (TI) and as a quality control, a separate split of seawater samples was treated with HCl/ Na₂S₂O₅ to reduce iodine completely to I^- and subsequently processed through the chromatographic method. The eluents from chromatography were collected in Savillex^® PFA Teflon vials and then diluted 20 times in 0.2M HNO₃-0.9% TMAH before instrumental analysis. The iodine concentrations were measured using a Thermo Scientific iCAP Q triple-quadrupole inductively coupled plasma mass spectrometer (ICP-MS-TQ) using Qtegra software version 2.10.3324.131 in both single-quad (SQ) and triple-quad (TQ) modes with O₂ reaction cell gas.

For quality control, a 200ppb I^- solution, which was gravimetrically diluted from the Inorganic Ventures© 1000±4ug/ml I^- ICP-MS standard solution in 1% tetraethyl ammonium (TEA), was processed through chromatography alongside the seawater samples to estimate the yield of I^-, DOI and TI fractions. Similarly, for estimating the yield of IO₃^- reduction and column separation, a 200ppb KIO₃ solution dissolved from gravimetrically weighed solid KIO₃ powder (Fisher Science Education) was reduced and chromatographically processed. Yields from standards were applied to corrections for unknown samples. For monitoring contamination, ultra-pure water was processed through the columns. Among each set of seawater samples (11 samples) which were processed at the same time, one of them was randomly selected as a replicate.

The eluents from the chromatography were collected in Savillex PFA Teflon vials and then diluted 20 times (0.2M HNO₃-0.9% TMAH) before instrumental analysis. The iodine concentrations were measured using a Thermo Scientific iCAP Q triple-quadrupole inductively coupled plasma mass spectrometer (ICP-MS-TQ) using Qtegra software version 2.10.3324.131 in both single-quad (SQ) and triple-quad (TQ) mode with O₂ reaction cell gas. The samples were introduced into the ICP-MS via a Teledyne Cetac ASX-520 autosampler. We used 5ppb internal standard solution diluted from 1001±3ug/ml indium (In) in 2% HNO₃, 999±5ug/ml Rhodium (Rh) in 15% HCl, and 1000±4ug/ml Cesium 0.1% HNO₃ (Cs) elemental standards from Inorganic Ventures© to calibrate the intensity of iodine and to correct for instrumental drift during the analytical run. The internal standard was either spiked into each sample or was introduced into the ICP-MS after being mixed with sample within an inline mixing chamber. Detection limits for samples were determined as 10 nmol/kg iodine.

16:T576,This section documents curation actions performed prior to publication review with the submitter, and additional information relevant to understanding and reusing this dataset. It distinguishes changes made to the submitted (meta)data from unresolved issues and/or enhancements that improve future reuse and interoperability. CURATION ACTIONS PERFORMED ON DATA - Loaded data from "SidersPond_iodine_depth_profiles.xlsx" (sheet 1) treating all values as strings, with "", "nd", and "N/A" set as missing values - Combined ISO_DateTime_collected_UTC (format %m-%d-%y) and UTC_Time (%H:%M) into a single ISO 8601 datetime field ISO_DateTime_collected_UTC (output format %Y-%m-%dT%H:%MZ, type datetime) - Deleted UTC_Time column - Extracted non-numeric values from iodate_concentration_nM and DOI_concentration_nM into new flag columns iodate_concentration_nM_flag and DOI_concentration_nM_flag; original columns set to None where non-numeric - Renamed column Total I_concentration_nM to Total_I_concentration_nM and depth_m to depth to remove units from parameter names to align with BCO-DMO naming guidance - Output written to 1000740_v1_siders_pond_iodine.csv CURATION ACTIONS PERFORMED ON METADATA - BCO-DMO's standard metadata entry and text formatting steps were performed. See: https://www.bco-dmo.org/how-to/standard-curation-edits ISSUES POTENTIALLY IMPACTING REUSE - N/A17:T4ed,A benchtop triple quadrupole (TQ) inductively coupled plasma mass spectrometer (ICP-MS) with a four channel peristaltic pump, three plasma gas flow controllers, and four QCell mass flow controllers. The iCAP TQ utilises triple quadrupole technology which allows the analyte signal to be isolated from interferences, enabling the analysis of complex or high-matrix samples. The high frequency (4 MHz) quadrupole mass analyser has pre and post filters for isolation of wanted ions. The instrument features Peltier cooled high purity quartz or perfluoroalkoxy alkane (PFA), and low volume, baffled cyclonic or double pass spray chambers to efficiently filter out larger aerosol droplets for improved plasma stability. A reaction finder method development assistant aids easy method development. The plasma system is designed to rapidly adapt to changing matrices and provide robustness for challenging samples such as highly volatile organic solvents. The argon ICP ion source has a digital, solid state radiofrequency generator, and dynamic frequency impedance matching the plasma at 27 MHz. The iCAP TQ has applications in trace element analysis of solid or liquid (particularly sediment or sea water) samples. It has a nebuliser default flow rate of 400 uL/min.18:Te43,NSF Award Abstract: The trace element manganese (Mn) is distributed widely throughout the global ocean where it cycles among three dominant oxidation states. Manganese in the higher oxidation states is highly reactive and thereby influences the cycling of nearly all other elemental cycles, including those of oxygen and nitrogen. The intermediate Mn species has only recently become recognized as an abundant component of the Mn pool, presenting now a previously unrecognized factor that may control the chemistry of the ocean. The Baltic Sea contains high Mn concentrations and preliminary investigations have pointed to the presence of an operationally defined "reactive" form of Mn but the composition and consequence of this Mn pool are unknown. This research will explore the cycling of Mn within the Baltic Sea enabled by an established collaboration with the Leibniz Institute for Baltic Sea Research in Warnemunde, Germany. By coupling field measurements and targeted shipboard incubations, this study will shed light on the processes controlling the Mn cycle and its link to the oxygen, iodine, and nitrogen cycles. This project will educate several undergraduate and graduate students and promote scientific exchange between research groups within the United States and Germany. Further, outreach efforts associated with this research will continue an existing collaboration between the PIs and the Boston Green Academy in South Boston to introduce high school students to chemical oceanography, and in particular biogeochemistry. Manganese (Mn) is intricately linked to nearly all elemental cycles, and yet we know little about the processes governing its redox cycling within natural systems. Over the past decade a number of key scientific discoveries have provided greater insight into the diversity of processes and mechanisms involved in Mn redox cycling and introduced Mn(III) ligand complexes as important components of the dissolved Mn pool. The Baltic Sea is one of the most well studied stratified marine systems and reactive Mn has been implicated as a key factor in the formation and maintenance of suboxic zones. Thus, the goal of this research is to explore the cycling and elemental coupling of Mn within stratified basins of the Baltic Sea. The PIs predict that reactive Mn, as Mn(III) ligand complexes and Mn oxide particles, is a primary control on the redox landscape of stratified marine waters, particularly at redox boundaries and within the suboxic zone. The PIs propose fieldwork in a local permanently stratified brackish pond to refine experimental procedures followed by two cruises to suboxic basins in the Baltic Sea enabled by an established collaboration with the Leibniz Institute for Baltic Sea Research in Warnemunde. Field measurements will be obtained using a combination of in situ sensors and ship/lab-based instrumentation at several Baltic Sea sites to define the distribution of Mn species and the rates of Mn redox transformations spanning the redoxcline along with a suite of chemical information. Further, a matrix of shipboard incubations will be conducted to constrain the underlying (a)biotic processes responsible for the observed Mn profiles. Specifically, across oxygen and Mn gradients spanning the redoxcline, the PIs will interrogate the link between the Mn cycle and iodine and nitrogen species, which will ultimately help constrain current gaps in the mass balance of these elements in Baltic Sea models. 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.6:["$","$L14",null,{"dataset":{"_id":"1000740","description":"","problem":"","acquisition":"$15","processing":"

Data were processed using Excel.

\n","bcodmoProcessing":"$16","title":"Dissolved iodine speciation depth profile measurements from Siders Pond, Falmouth, Massachusetts, USA, Jul 2020 to Jul 2021","nickname":"Siders Pond iodine temporal depth profiles (2020-2021)","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2026-06-10T04:00:00.000Z","abstract":"The Siders Pond samples were collected and filtered on four sampling days of July 17, September 19, November 6, 2020 and July 31, 2021. We specifically used iodine exchange chromatography to separate and individually measure each total dissolved iodine, dissolved iodate, dissolved iodide, and dissolved organic iodine with inductively coupled plasma mass spectrometry, and reported the resulting concentrations together with sampling metadata. The samples were collected by researchers at Woods Hole Oceanographic Institution and iodine measurements made at Michigan State University. The iodine measurements contribute to a temporal study of the cycling of redox-sensitive elements in the salinity-stratified pond, including reactions between multiple biogeochemical cycles and sources and sinks. ","citation":"Hardisty, D. (2026) Dissolved iodine speciation depth profile measurements from Siders Pond, Falmouth, Massachusetts, USA, Jul 2020 to Jul 2021. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-06-10 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.1000740.1 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.1000740.1","versionDate":"2026-06-10","versionId":"1","year":"2026","title":"Dissolved iodine speciation depth profile measurements from Siders Pond, Falmouth, Massachusetts, USA, Jul 2020 to Jul 2021","authors":"Hardisty, D.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"10.26008/1912/bco-dmo.1000740.1","release_date":null,"field_dataset_location":"Siders Pond, Falmouth, Massachusetts, USA ","temporal_extent":{"start":"2020-07-17T04:00:00.000Z","end":"2021-07-27T04:00:00.000Z"},"temporal":{"resolution":"time:unitDay","type":"time:Interval","start":{"value":"1594958400","label":"2020-07-17"},"end":{"value":"1627358400","label":"2021-07-27"}},"spatial_extent":{"shape":"polygon","center":{"latitude":41.549195854174,"longitude":-70.621662827175},"wkt":"POLYGON ((-70.6239537 41.5465985, -70.6193716 41.5465985, -70.6193716 41.551793, -70.6239537 41.551793, -70.6239537 41.5465985))","north":41.551793,"east":-70.6193716,"south":41.5465985,"west":-70.6239537},"dataset_type":["Other Field Results"],"keywords":["oceans"],"data_files":[{"id":"1007215","title":"1000740_v1_siders_pond_iodine.csv","url":"https://datadocs.bco-dmo.org/dataset/1000740/file/rgLX2oRFwgroBL/1000740_v1_siders_pond_iodine.csv","showTableUrl":"https://www.bco-dmo.org/dataset/1000740/data/view/1007215","description":"Primary data file for dataset ID 1000740, version 1","filename":"1000740_v1_siders_pond_iodine.csv","bytesize":6860,"checksum":{"value":"0e55d003b65a64887f71d815d18fc29a","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"bcodmo_dataset_1000740_v1","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"860011","name":"Dalton Hardisty"},"performedAtOrganization":{"_id":"328","name":"Michigan State University"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"924467","name":"Audrey Mickle"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[],"funding":[{"_id":"929159","name":"OCE-1924236","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1924236"}],"instruments":[{"_id":"1000765","name":"Teledyne Cetac ASX-520 autosampler","description":"The samples were introduced into the ICP-MS via a Teledyne Cetac ASX-520 autosampler.","type_id":"818479","type_name":"Laboratory Autosampler","type_desc":"Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.","type_acronym":""},{"_id":"1007214","name":"peristaltic pump","description":"Water from desired depths was collected by pumping water through Norprene tubing (MasterFlex) via a peristaltic pump directly into acid-cleaned bottles. 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","type_id":"962719","type_name":"Thermo Fisher Scientific iCAP TQ inductively coupled plasma mass spectrometer","type_desc":"$17","type_acronym":"iCAP TQ ICP-MS"}],"parameters":[{"_id":"1000745","name":"sample_ID","format":"","frictionlessType":"string","description":"

Sample ID

","units":{"_id":"","name":"unitless"},"type":{"_id":"960","name":"sample","description":"

unique sample identification or number; any combination of alpha numeric characters; precise definition is file dependent

"}},{"_id":"1000746","name":"station_number","format":"","frictionlessType":"string","description":"

Station number

","units":{"_id":"","name":"unitless"},"type":{"_id":"987","name":"station","description":"

Station identifier; a unique number or alphanumeric string designating a general geographic location at which one or more sampling activities may occur.

"}},{"_id":"1000747","name":"depth","format":"","frictionlessType":"number","description":"

Depth of sample collection

","units":{"_id":"","name":"meters"},"type":{"_id":"808","name":"depth","description":"

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

\nWhen used in a JGOFS/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.

"}},{"_id":"1000749","name":"iodide_concentration_nM","format":"","frictionlessType":"number","description":"

Iodide concentration; 10 nanomole/kg detection limit

","units":{"_id":"","name":"nanomole/kg"},"type":{"_id":"1265","name":"iodide","description":"

iodide concentration, iodine anion (I-)

"}},{"_id":"1000750","name":"iodate_concentration_nM","format":"","frictionlessType":"number","description":"

Iodate concentration; 10 nanomole/kg detection limit

","units":{"_id":"","name":"nanomole/kg"},"type":{"_id":"873327","name":"iodate","description":"

Iodate (IO3-), iodine in the V oxidation state

"}},{"_id":"1000751","name":"iodate_concentration_nM_flag","format":"","frictionlessType":"string","description":"

Flag indicating the iodate concentration is <10

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"1000752","name":"DOI_concentration_nM","format":"","frictionlessType":"number","description":"

Dissolved organic iodine concentration; 10 nanomole/kg detection limit

","units":{"_id":"","name":"nanomole/kg"},"type":{"_id":"915169","name":"iodine_DOI","description":"

dissolved organic iodine (DOI)

"}},{"_id":"1000753","name":"DOI_concentration_nM_flag","format":"","frictionlessType":"string","description":"

Flag indicating the DOI concentration is <10

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"1000754","name":"Total_I_concentration_nM","format":"","frictionlessType":"number","description":"

Total iodine concentration; 10 nanomole/kg detection limit

","units":{"_id":"","name":"nanomole/kg"},"type":{"_id":"1266","name":"iodine_tot","description":"

iodine; total

"}},{"_id":"1000755","name":"ISO_DateTime_collected_UTC","format":"%Y-%m-%dT%H:%MZ","frictionlessType":"datetime","description":"

Datetime of sampling event, UTC

","units":{"_id":"","name":"unitless"},"type":{"_id":"1908","name":"ISO_DateTime_UTC","description":"

Date/Time (UTC) ISO formatted
\nThis standard is based on ISO 8601:2004(E) and takes on any of the following forms:
\n2009-08-30T09:05:00[.xx] (local time)
\n2009-08-30T14:05:00[.xx]Z (UTC time)
\n2009-08-30T14:05:00[.xx]-05:00
\nThe dashes and the colons can be dropped.
\nThe T can also be dropped \"by mutual agreement\", but one needs the trailing Z if the time is UTC.

Sample ISO_datetime_utc:
\n2009-08-30T14:05:00[.xx]Z (UTC time)

Format: YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)

"}},{"_id":"1000757","name":"Latitude","format":"","frictionlessType":"number","description":"

Latitude of sample, positive is North

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"730","name":"latitude","description":"

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

"}},{"_id":"1000759","name":"Longitude","format":"","frictionlessType":"number","description":"

Longitude of sample, negative is West

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"731","name":"longitude","description":"

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datasets as degrees, minutes

"}}],"related_publications":[{"id":"1007211","citation":"Campos, M. L. A. M. (1997). New approach to evaluating dissolved iodine speciation in natural waters using cathodic stripping voltammetry and a storage study for preserving iodine species. Marine Chemistry, 57(1-2), 107–117. https://doi.org/10.1016/s0304-4203(96)00093-x\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"1007212","citation":"Farrenkopf, A. M., & Luther III, G. W. (2002). Iodine chemistry reflects productivity and denitrification in the Arabian Sea: evidence for flux of dissolved species from sediments of western India into the OMZ. Deep Sea Research Part II: Topical Studies in Oceanography, 49(12), 2303–2318. https://doi.org/10.1016/s0967-0645(02)00038-3\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"865263","citation":"Hardisty, D. S., Horner, T. J., Wankel, S. D., Blusztajn, J., & Nielsen, S. G. (2020). Experimental observations of marine iodide oxidation using a novel sparge-interface MC-ICP-MS technique. Chemical Geology, 532, 119360. doi:10.1016/j.chemgeo.2019.119360\r\n","relation_type":["Methods"],"relation_desc":""}],"related_datasets":[],"services":[{"grouping":"","items":[{"name":"View Data","description":"An in-browser view of the primary tabular data file","url":"https://www.bco-dmo.org/dataset/1000740/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"ERDDAP","items":[{"name":"SUBSET DATA","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.html","contentType":"text/html","actionType":"tool"},{"name":"VIEW TABLE","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.htmlTable","contentType":"text/html","actionType":"view"},{"name":"CSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.csv","contentType":"text/csv","actionType":"download"},{"name":"TSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.tsv","contentType":"text/tsv","actionType":"download"},{"name":"GeoJSON","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.geoJson","contentType":"application/geo+json","actionType":"download"},{"name":"MATLAB","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.mat","contentType":"text/x-matlab","actionType":"download"},{"name":"netCDF","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.nc","contentType":"application/x-netcdf","actionType":"download"},{"name":"ODV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1000740_v1.odvTxt","contentType":"text/plain","actionType":"download"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/1000740/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/1000740/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/1000740/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[],"projects":[{"_id":"929160","name":"Collaborative Research: Manganese Cycling and Coupling Across Redox Boundaries within Stratified Basins of the Baltic Sea","acronym":"MnIONS","description":"$18"}],"archives":[{"id_value":"10.26008/1912/bco-dmo.1000740.1","url":"https://doi.org/10.26008/1912/bco-dmo.1000740.1","date_assigned":"2026-09-08","version_date":"2026-06-10","archiver":"Woods Hole Oceanographic Institution (WHOI BCO-DMO)","archiver_id":"191"}],"license":{"name":"Creative Commons Attribution 4.0","id":"CC-BY-4.0","uri":"https://creativecommons.org/licenses/by/4.0/","spdxUri":"https://spdx.org/licenses/CC-BY-4.0"},"metrics":{"views":{"count":28},"downloads":{"count":7}}}}]