http://lod.bco-dmo.org/id/dataset/936689 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 2024-09-06 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Carbon and nitrogen isotope data from zooplankton and fish larvae collected on the SR2114 expedition in the Eastern Tropical North Pacific aboard the R/V Sally Ride from December 2021 to January 2022 2024-09-06 publication 2024-09-06 revision Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA) 2025-11-03 publication https://doi.org/10.26008/1912/bco-dmo.936689.1 Juan Gerardo Gutiérrez-Bravo University of Massachusetts Dartmouth 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: Gutiérrez-Bravo, J. G. (2025) Carbon and nitrogen isotope data from zooplankton and fish larvae collected on the SR2114 expedition in the Eastern Tropical North Pacific aboard the R/V Sally Ride from December 2021 to January 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-09-06 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.936689.1 [access date] SR2114 Fish larvae isotope data Dataset Description: Methods and Sampling: &lt;p&gt;An oceanographic survey was performed onboard the RV Sally Ride from Puntarenas, Costa Rica to San Diego, USA. Forty-nine CTD-rosette stations and 8 MOCNESS tows (Multiple Opening-Closing Net and Environmental Sensing System; Wiebe et al. 1985) were conducted along the cruise track (see Figure 1 of Gutiérrez-Bravo, et al. 2024). The CTD-rosette system used for water sampling and water column profiling included a SeaBird SBE9+ CTD and calibrated Seapoint-Fluorescence and SBE 43-DO sensors. A MOCNESS system was used for zooplankton and fish sampling and was equipped with 10 nets of 1 square meter (m^2) mouth opening and 333 micrometer (µm) mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 DO sensor, and flow meter and angle sensors.&lt;/p&gt; &lt;p&gt;The vertical sampling strategy followed five specific oxypleths (referred to as sampling levels) using horizontal tows. The deep level followed the 10 micromoles per kilogram (µmol/kg) oxypleth below the anoxic core (~900 meters (m) depth). The anoxic level followed the center of the anoxic core, with DO &amp;lt;1 µmol/kg and depth of ~450 m. The suboxic and hypoxic levels followed the 10 and 100 µmol/kg oxypleths above the anoxic core, with varying depths. The oxic level followed the &amp;gt;200 µmol/kg oxypleth near the surface (~20 m). Abrupt vertical oxygen gradients and the lagged depth control of the MOCNESS tow caused DO values to be less than half or more than double the desired DO values in seven out of 40 nets (M1-Oxic, M1-Hypoxic, M6-Hypoxic, M3-Suboxic, M6-Suboxic, M7-Suboxic and M8-Anoxic). These nets were considered outliers and were removed from the inter-level comparison statistics.&lt;/p&gt; &lt;p&gt;The zooplankton samples were preserved in ethanol 95%. Fish larvae were separated and identified to the most specific taxonomic level possible. The larval stages (preflexion, flexion, postflexion, and transformation) were defined according to Moser (1996). Juveniles and adults were separated, counted, and identified to the most specific taxonomic level possible. A more comprehensive description of the sample processing is described in Gutiérrez Bravo et al. (2024). The habitat type of each taxon was consulted in specialized literature (Moser 1996; Aceves-Medina et al. 2003; Froese and Pauly 2010).&lt;/p&gt; &lt;p&gt;The stable isotope ratios of carbon (13C/12C) and nitrogen (15N/14N) were measured on 39 samples of zooplankton (sample M5-Suboxic presented issues), 44 samples of fish larvae, and 8 samples of fish adults. For zooplankton, a wide-mouth 1.5 milliliter (mL) pipette was used to separate an aliquot from each of the 40 zooplankton samples. This approach was used to assess the integrated isotopic signature of the whole zooplankton community, and does not resolve species-specific differences. For fish, on the other hand, individuals of the same species, same development stage, and same net, were separated using a stereoscope and tweezer to obtain a critical weight of &amp;gt;2 milligrams (mg). Adjacent development stages were pooled if the sample weight was lower than 2mg.&lt;/p&gt; &lt;p&gt;The samples were rinsed to remove ethanol with deionized water, and then dried at 60 degrees Celsius (°C) for 24 hours. The dried samples were then ground to a fine powder using a mortar and pestle. The samples were loaded into tin cups and weighed to ~2mg using an analytical balance. Carbon and nitrogen isotope ratios were measured at the Boston University Stable Isotope Laboratory using a GV Instruments IsoPrime isotope ratio mass spectrometer coupled with an elemental analyzer.&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1851361 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1851361 completed Juan Gerardo Gutiérrez-Bravo University of Massachusetts Dartmouth jgutierrezbravo@umassd.edu pointOfContact asNeeded Dataset Version: 1 Unknown MOCNESS Level Level_Outlier LevelName Date Latitude Longitude Depth Sal_SA Temperature Oxygen Species Hab Stage Stage1PreFlex Wt pcnt_C d13C pcnt_N d15N C_N_ratio MOCNESS, SeaBird SBE9+ CTD elemental analyzer flow meter GV Instruments IsoPrime isotope ratio mass spectrometer SeaBird SBE 43 DO sensor theme None, User defined number sample description date latitude longitude depth salinity water temperature at measurement depth dissolved Oxygen species scientific name (binomial) site description stage weight Elemental carbon (C) d13C Nitrogen d15N Carbon to Nitrogen ratio (C:N) featureType BCO-DMO Standard Parameters CTD MOCNESS Elemental Analyzer Flow Meter Isotope-ratio Mass Spectrometer Sea-Bird SBE 43 Dissolved Oxygen Sensor instrument BCO-DMO Standard Instruments SR2114 service Deployment Activity Eastern Tropical Pacific from Costa Rica to San Diego, CA, USA 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: Multiyear autonomous measurement of N-loss in the ETNP ODZ https://osprey.bco-dmo.org/project/925430 Collaborative Research: Multiyear autonomous measurement of N-loss in the ETNP ODZ <p><em>NSF Award Abstract:</em><br /> Several regions of the deep ocean naturally contain almost no oxygen. Because of this lack of oxygen, microbes living in these regions live in ways that differ from those in oxygenated waters consuming nitrate ions instead of oxygen for respiration. Use of nitrate for microbial respiration results in the production of nitrogen gas which is called denitrification. The resulting removal of nitrate has consequences for the whole ocean as nitrogen is an important nutrient controlling plant growth; however, whereas plants can use nitrogen in the form of nitrate, they cannot, with a few exceptions, use nitrogen gas. There remains a number of uncertainties regarding how much denitrification occurs in the ocean, what controls it, and how it varies in time and space. Traditional studies of ocean denitrification have been limited by the time ships can be at sea and the relatively small proportion of the ocean they can observe. Our project plans to remedy this problem by using vehicles called floats that can operate autonomously in the ocean for three years or more as they drift with currents over hundreds of kilometers. We will outfit ten floats with sensors to measure oxygen and nitrogen gas which will be placed throughout the oxygen-depleted region of the Pacific Ocean to the west of Mexico. This is the largest such region in the ocean from which we have two years of results from a prototype float which validated our approach. This study may well transform our understanding of ocean denitrification and ultimately benefit society as a whole through greater confidence in predictions of the ocean's nitrogen cycle and capacity to fix carbon dioxide under current and future conditions. Application and further development of float systems using commercially available technology will directly benefit successor studies, and more broadly showcase the use of water-following platforms to tackle difficult oceanographic problems. Advances from this study are expected to carry over to other disciplines including ocean biogeochemical modeling. Outreach activities, support for an early career scientist, and student training are included in the project. For the outreach activities, the investigators plan to tie into well-established after-school programs serving underrepresented populations in Massachusetts and established opportunities for public presentations using float related display materials at the University of Washington.</p> <p>Oxygen deficient zones (ODZs), despite constituting a small fraction of total oceanic volume, play important roles in regulating global ocean carbon and nitrogen cycles including hosting 30 to 50% of the global loss of fixed nitrogen. Unfortunately, current uncertainty in ODZ nitrogen loss derives from substantial temporal and spatial variability in rates that remain under-sampled by ship-based measurements. While local regulation of nitrogen loss by oxygen and organic matter availability are well accepted, temporal/spatial variability in the nitrogen flux is likely a result of the influence of physical forcings such as remote ventilation, seasonal variability, and mesoscale eddies. Understanding how the impact of physical forcings on nitrogen loss as mediated through oxygen and organic flux will be required to fully understand the causes and consequences of any future ODZ expansion. To improve our understanding of ODZ nitrogen loss, we will carry out a multiyear, autonomous float-based observational program to address outstanding questions regarding bioavailable nitrogen loss in ODZs. As the largest ODZ and region of our pilot deployments, our operation area will be the Eastern Tropical N. Pacific (ETNP) where our study will determine over a multi-year period, in-situ nM-level oxygen and biogenic nitrogen on float profiles spanning geographic gradients in oxygen and surface productivity. For the first time, our study will also determine in situ nitrogen loss rates from changes in nitrogen concentration during 1 to 2 week Lagrangian float drifts along a constant density surface. A pilot 2 yr float deployment in the ETNP documents our ability to do so. Critically, our float-based approach more closely matches the frequency and distribution of observations to the expected variability in biogenic nitrogen production as compared to prior work and will dramatically increase the data density for this region by acquiring &gt;500 profiles/drifts for nitrogen and &gt;1000 profiles for nM oxygen.</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> N-loss in the ETNP ODZ largerWorkCitation project eng; USA oceans Eastern Tropical Pacific from Costa Rica to San Diego, CA, USA -114.67 -89.14 8.59 21.87 2021-12-26 2022-01-17 0 BCO-DMO catalogue of parameters from Carbon and nitrogen isotope data from zooplankton and fish larvae collected on the SR2114 expedition in the Eastern Tropical North Pacific aboard the R/V Sally Ride from December 2021 to January 2022 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/936761.rdf Name: MOCNESS Units: unitless Description: <p>Sequential MOCNESS number under the sampling strategy</p> http://lod.bco-dmo.org/id/dataset-parameter/936762.rdf Name: Level Units: unitless Description: <p>Sampling level identifier. 1=Oxic ---&gt; 5=Deep.</p> http://lod.bco-dmo.org/id/dataset-parameter/936763.rdf Name: Level_Outlier Units: unitless Description: <p>Sampling level identifier denoting outliers. 1=Oxic ---&gt; 5=Deep. 0 = Outlier. Abrupt vertical oxygen gradients and the lagged depth control of the MOCNESS tow caused DO values to be less than half or more than double the desired DO values in seven out of 40 nets (M1-Oxic, M1-Hypoxic, M6-Hypoxic, M3-Suboxic, M6-Suboxic, M7-Suboxic and M8-Anoxic). These are the outliers, marked as 0.</p> http://lod.bco-dmo.org/id/dataset-parameter/936764.rdf Name: LevelName Units: unitless Description: <p>Name of the MOCNESS sampling level</p> http://lod.bco-dmo.org/id/dataset-parameter/936765.rdf Name: Date Units: unitless Description: <p>Date of sampling</p> http://lod.bco-dmo.org/id/dataset-parameter/936766.rdf Name: Latitude Units: decimal degrees North Description: <p>Latitude of sampling</p> http://lod.bco-dmo.org/id/dataset-parameter/936767.rdf Name: Longitude Units: decimal degrees East Description: <p>Longitude of sampling</p> http://lod.bco-dmo.org/id/dataset-parameter/936768.rdf Name: Depth Units: meters (m) Description: <p>Distance from surface ocean in meters</p> http://lod.bco-dmo.org/id/dataset-parameter/936769.rdf Name: Sal_SA Units: PSU Description: <p>Absolute salinity</p> http://lod.bco-dmo.org/id/dataset-parameter/936770.rdf Name: Temperature Units: degrees Celsius Description: <p>Temperature, conservative TEOS 10</p> http://lod.bco-dmo.org/id/dataset-parameter/936771.rdf Name: Oxygen Units: micromoles per kilogram (umol/kg) Description: <p>Dissolved oxygen</p> http://lod.bco-dmo.org/id/dataset-parameter/936772.rdf Name: Species Units: unitless Description: <p>Identified species name</p> http://lod.bco-dmo.org/id/dataset-parameter/936773.rdf Name: Hab Units: unitless Description: <p>Habitat according to Moser 1996 and FishBase 2024</p> http://lod.bco-dmo.org/id/dataset-parameter/936774.rdf Name: Stage Units: unitless Description: <p>Fish larvae development stage according to Moser 1996</p> http://lod.bco-dmo.org/id/dataset-parameter/936775.rdf Name: Stage1PreFlex Units: unitless Description: <p>Sequential development stage number (1=flexion, 5=adult). X indicates zooplankton (stage does not apply). Stage 1 is preflexion. 2 is flexion. 3 is postflexion. 4 is transformation. 5 is juveniles/adult.</p> http://lod.bco-dmo.org/id/dataset-parameter/936776.rdf Name: Wt Units: milligrams (mg) Description: <p>Weight</p> http://lod.bco-dmo.org/id/dataset-parameter/936777.rdf Name: pcnt_C Units: unitless Description: <p>Percentage of carbon by elemental analyzer</p> http://lod.bco-dmo.org/id/dataset-parameter/936778.rdf Name: d13C Units: per mil Description: <p>delta C-13</p> http://lod.bco-dmo.org/id/dataset-parameter/936779.rdf Name: pcnt_N Units: unitless Description: <p>Percentage of nitrogen by elemental analyzer</p> http://lod.bco-dmo.org/id/dataset-parameter/936780.rdf Name: d15N Units: per mil Description: <p>delta N-15</p> http://lod.bco-dmo.org/id/dataset-parameter/936781.rdf Name: C_N_ratio Units: unitless Description: <p>Carbon to nitrogen ratio</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 11288 https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/0f15d543-f9db-402b-b2d3-ffc74d911e92/content download https://doi.org/10.26008/1912/bco-dmo.936689.1 download onLine dataset &lt;p&gt;An oceanographic survey was performed onboard the RV Sally Ride from Puntarenas, Costa Rica to San Diego, USA. Forty-nine CTD-rosette stations and 8 MOCNESS tows (Multiple Opening-Closing Net and Environmental Sensing System; Wiebe et al. 1985) were conducted along the cruise track (see Figure 1 of Gutiérrez-Bravo, et al. 2024). The CTD-rosette system used for water sampling and water column profiling included a SeaBird SBE9+ CTD and calibrated Seapoint-Fluorescence and SBE 43-DO sensors. A MOCNESS system was used for zooplankton and fish sampling and was equipped with 10 nets of 1 square meter (m^2) mouth opening and 333 micrometer (µm) mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 DO sensor, and flow meter and angle sensors.&lt;/p&gt; &lt;p&gt;The vertical sampling strategy followed five specific oxypleths (referred to as sampling levels) using horizontal tows. The deep level followed the 10 micromoles per kilogram (µmol/kg) oxypleth below the anoxic core (~900 meters (m) depth). The anoxic level followed the center of the anoxic core, with DO &amp;lt;1 µmol/kg and depth of ~450 m. The suboxic and hypoxic levels followed the 10 and 100 µmol/kg oxypleths above the anoxic core, with varying depths. The oxic level followed the &amp;gt;200 µmol/kg oxypleth near the surface (~20 m). Abrupt vertical oxygen gradients and the lagged depth control of the MOCNESS tow caused DO values to be less than half or more than double the desired DO values in seven out of 40 nets (M1-Oxic, M1-Hypoxic, M6-Hypoxic, M3-Suboxic, M6-Suboxic, M7-Suboxic and M8-Anoxic). These nets were considered outliers and were removed from the inter-level comparison statistics.&lt;/p&gt; &lt;p&gt;The zooplankton samples were preserved in ethanol 95%. Fish larvae were separated and identified to the most specific taxonomic level possible. The larval stages (preflexion, flexion, postflexion, and transformation) were defined according to Moser (1996). Juveniles and adults were separated, counted, and identified to the most specific taxonomic level possible. A more comprehensive description of the sample processing is described in Gutiérrez Bravo et al. (2024). The habitat type of each taxon was consulted in specialized literature (Moser 1996; Aceves-Medina et al. 2003; Froese and Pauly 2010).&lt;/p&gt; &lt;p&gt;The stable isotope ratios of carbon (13C/12C) and nitrogen (15N/14N) were measured on 39 samples of zooplankton (sample M5-Suboxic presented issues), 44 samples of fish larvae, and 8 samples of fish adults. For zooplankton, a wide-mouth 1.5 milliliter (mL) pipette was used to separate an aliquot from each of the 40 zooplankton samples. This approach was used to assess the integrated isotopic signature of the whole zooplankton community, and does not resolve species-specific differences. For fish, on the other hand, individuals of the same species, same development stage, and same net, were separated using a stereoscope and tweezer to obtain a critical weight of &amp;gt;2 milligrams (mg). Adjacent development stages were pooled if the sample weight was lower than 2mg.&lt;/p&gt; &lt;p&gt;The samples were rinsed to remove ethanol with deionized water, and then dried at 60 degrees Celsius (°C) for 24 hours. The dried samples were then ground to a fine powder using a mortar and pestle. The samples were loaded into tin cups and weighed to ~2mg using an analytical balance. Carbon and nitrogen isotope ratios were measured at the Boston University Stable Isotope Laboratory using a GV Instruments IsoPrime isotope ratio mass spectrometer coupled with an elemental analyzer.&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;The results were compared to international standards (Pee Dee Belemnite for 13C and atmospheric nitrogen for 15N) and presented as delta notation. MOCNESS data were analyzed using SBE Data processing.&lt;/p&gt; Specified by the Principal Investigator(s) - Imported original file &quot;Supp material.xlsx&quot; into the BCO-DMO system. - Renamed fields to comply with BCO-DMO naming conventions. - Converted Date column to YYYY-MM-DD format. - Saved the final file as &quot;936689_v1_sr2111_fish_larvae_isotope_data.csv&quot;. 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 MOCNESS, SeaBird SBE9+ CTD MOCNESS, SeaBird SBE9+ CTD PI Supplied Instrument Name: MOCNESS, SeaBird SBE9+ CTD PI Supplied Instrument Description:A MOCNESS system was used for zooplankton and fish sampling and was equipped with 10 nets of 1 m^2 mouth opening and 333 µm mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 DO sensor, and flow meter and angle sensors. Instrument Name: CTD MOCNESS Instrument Short Name:CTD MOCNESS Instrument Description: The CTD part of the MOCNESS includes 1) a pressure (depth) sensor which is a thermally isolated titanium strain gauge with a standard range of 0-5000 decibars full scale, 2) A Sea Bird temperature sensor whose frequency output is measured and sent to the surface for logging and conversion to temperature by the software in the MOCNESS computer (The system allows better than 1 milli-degree resolution at 10 Hz sampling rate), and 3) A Sea Bird conductivity sensor whose output frequency is measured and sent to the surface for logging and conversion to conductivity by the software in the computer (The system allows better than 1 micro mho/cm at 10 Hz sampling rate). The data rate depends on the speed of the computer and the quality of the cable. With a good cable, the system can operate at 2400 baud, sampling all variables at 2 times per second. One sample every 4 seconds is the default, although the hardware can operate much faster. (From The MOCNESS Manual) Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/131/ elemental analyzer elemental analyzer PI Supplied Instrument Name: elemental analyzer PI Supplied Instrument Description:Carbon and nitrogen isotope ratios were measured at the Boston University Stable Isotope Laboratory using a GV Instruments IsoPrime isotope ratio mass spectrometer coupled with an elemental analyzer. Instrument Name: Elemental Analyzer Instrument Short Name: Instrument Description: Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/ flow meter flow meter PI Supplied Instrument Name: flow meter Instrument Name: Flow Meter Instrument Short Name:Flow Meter Instrument Description: General term for a sensor that quantifies the rate at which fluids (e.g. water or air) pass through sensor packages, instruments, or sampling devices. A flow meter may be mechanical, optical, electromagnetic, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/388/ GV Instruments IsoPrime isotope ratio mass spectrometer GV Instruments IsoPrime isotope ratio mass spectrometer PI Supplied Instrument Name: GV Instruments IsoPrime isotope ratio mass spectrometer PI Supplied Instrument Description:Carbon and nitrogen isotope ratios were measured at the Boston University Stable Isotope Laboratory using a GV Instruments IsoPrime isotope ratio mass spectrometer coupled with an elemental analyzer. Instrument Name: Isotope-ratio Mass Spectrometer Instrument Short Name:IR Mass Spec; IRMS Instrument Description: The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/ SeaBird SBE 43 DO sensor SeaBird SBE 43 DO sensor PI Supplied Instrument Name: SeaBird SBE 43 DO sensor Instrument Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor Instrument Short Name:SBE-43 DO Instrument Description: The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/ Cruise: SR2114 SR2114 R/V Sally Ride Community Standard Description International Council for the Exploration of the Sea R/V Sally Ride vessel SR2114 Mark A. Altabet University of Massachusetts Dartmouth R/V Sally Ride Community Standard Description International Council for the Exploration of the Sea R/V Sally Ride vessel