http://lod.bco-dmo.org/id/dataset/969121 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 2025-07-17 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Nutrient, CTD Profile, and Nitrous oxide data from the Southern Benguela Upwelling System (Integrated Environmental Programme, February 2017) 2025-08-12 publication 2025-08-12 revision Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA) 2025-11-12 publication https://doi.org/10.26008/1912/bco-dmo.969121.1 Annie Bourbonnais University of South Carolina principalInvestigator Sarah E. Fawcett University of Cape Town principalInvestigator Julie Granger University of Connecticut principalInvestigator Jessica Burger University of Cape Town principalInvestigator Raquel Flynn University of Cape Town principalInvestigator Keshnee Pillay Department of Forestry, Fisheries and the Environment, Cape Town principalInvestigator Sina Wallschuss University of Cape Town 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: Wallschuss, S., Granger, J., Bourbonnais, A., Flynn, R., Burger, J., Pillay, K., Fawcett, S. E. (2025) Nutrient, CTD Profile, and Nitrous oxide data from the Southern Benguela Upwelling System (Integrated Environmental Programme, February 2017). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-08-12 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.969121.1 [access date] N2O isotopes in the Southern Benguela Upwelling System, February 2017 Dataset Description: Methods and Sampling: &lt;p&gt;Seawater samples were collected during a South African Department of Forestry, Fisheries and Environment (DFFE) Integrated Ecosystem Programme cruise aboard the &lt;em&gt;FRV Mirabilis&lt;/em&gt; in February 2017 along 14 stations across the St Helena Bay Monitoring Line (~32.5°S) and the Columbine upwelling cell. Hydrographic profiles were obtained using a Sea-Bird SBE 911 CTD with oxygen sensors and 12 x 6-liter (L) Niskin bottles. Oxygen sensors were calibrated against discrete Winkler titrations. Seawater for nutrient analysis (NO₃⁻+NO₂⁻, NO₂⁻, PO₄³⁻, Si(OH)₄) was collected following GO-SHIP protocols, frozen at -20 degrees Celsius (°C), and analyzed using flow injection analysis (FIA) and manual colorimetric methods. NH₄⁺ was determined fluorometrically using OPA derivatization immediately after collection.&lt;/p&gt; &lt;p&gt;N₂O samples were collected in 125-milliliter (mL) gas-tight glass bottles, preserved with saturated HgCl₂, and stored inverted at room temperature. Concentrations and isotopic compositions (δ¹⁵N-N₂O and δ¹⁸O-N₂O) were determined using a continuous-flow isotope ratio mass spectrometer (CF-MC-IRMS) following Bourbonnais et al. (2017) and McIlvin &amp;amp; Casciotti (2011). Calibration included internal seawater standards and N₂O reference gases spanning a wide isotopic range. Derived variables include apparent oxygen utilization (AOU), N-deficit (based on AOU–NO₃⁻ stoichiometry), and N₂O saturation disequilibrium (ΔN₂O), with equilibrium concentrations estimated from Weiss &amp;amp; Price (1980) using atmospheric N₂O histories from Liu &amp;amp; Tanhua (2024).&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2241432 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2241432 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2241433 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2241433 completed Annie Bourbonnais University of South Carolina abourbonnais@seoe.sc.edu pointOfContact Sarah E. Fawcett University of Cape Town 021 650 5369 Department of Oceanography 134 R.W. James Building sarah.fawcett@uct.ac.za pointOfContact Julie Granger University of Connecticut 860-405-9094 Department of Marine Sciences 1080 Shenecossett Road Groton CT 06340 USA julie.granger@uconn.edu pointOfContact Jessica Burger University of Cape Town jessica.burger@uct.ac.za pointOfContact Raquel Flynn University of Cape Town (+27) 79 517 2008 Oceanography Department, R.W. James Building Residence Road, University of Cape Town Cape Town Western Cape South Africa flyraq001@myuct.ac.za pointOfContact Keshnee Pillay Department of Forestry, Fisheries and the Environment, Cape Town pointOfContact Sina Wallschuss University of Cape Town swallschuss@gmail.com pointOfContact asNeeded Dataset Version: 1 Unknown Cruise_ID Station_ID ISO_DateTime_GMT Date Time Latitude Longitude Bottom_depth Pressure Depth Temperature Salinity Oxygen_mL_L Oxygen_umol_kg Nitrate Nitrite Phosphate Silicate N2O_equilibrium N2O D_N2O d15N_N2O d18O_N2O d15N_Nitrate d18O_Nitrate Sea-Bird Electronics SBE 911plus CTD system GV Instruments IsoPrime Continuous Flow Multi-Collector Isotope Ratio Mass Spectrometer (CF-MC-IRMS) Lachat QuickChem® 8500 Series 2 6-L Niskin bottles Sea-Bird SBE 43 Thermo Scientific Genesis 30 Visible Turner Designs Trilogy theme None, User defined Cruise identfier station ISO_DateTime_UTC date time of day latitude longitude depth_bottom water pressure depth water temperature at measurement depth salinity dissolved Oxygen Nitrate Nitrite phosphate Silicate, Si(OH)4, silicic acid Nitrous Oxide d15N oxygen 16 to oxygen 18 ratio d15N_NO3 d18O_NO3 featureType BCO-DMO Standard Parameters CTD Sea-Bird SBE 911plus GV Instruments IsoPrime Isotope Ratio Mass Spectrometer Lachat QuikChem 8500 flow injection analysis system Niskin bottle Sea-Bird SBE 43 Dissolved Oxygen Sensor Spectrophotometer Turner Designs Trilogy fluorometer instrument BCO-DMO Standard Instruments 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: Exploring the dynamics of nitrous oxide in the Southern Benguela Upwelling System https://osprey.bco-dmo.org/project/960022 Collaborative Research: Exploring the dynamics of nitrous oxide in the Southern Benguela Upwelling System <p><em>NSF Award Abstract:</em><br /> Nitrous oxide is a long-lived and powerful greenhouse gas. It is also a driver of ozone depletion in the stratosphere. Natural sources of nitrous oxide include production by bacteria through processes called nitrification and denitrification. The ocean is a major source of nitrous oxide to the atmosphere, and areas of high biological productivity like eastern boundary upwelling systems have been shown to generate particularly high nitrous oxide emissions to the atmosphere. The Southern Benguela Upwelling System (SBUS) is arguably the most productive eastern boundary upwelling system, yet there are no published measurements of nitrous oxide from this region. In addition, the relative importance of the major biological pathways of nitrous oxide production in the SBUS is not well established. A team of scientists from the University of Connecticut and the University of South Carolina will investigate nitrous oxide cycling in the SBUS, estimate nitrous oxide fluxes to the atmosphere, and explore what drives changes in nitrous oxide cycling across seasons and in different locations. This study will improve understanding of an important greenhouse gas and how its cycling might change in response to changing ocean conditions. Funding from the proposed work will sponsor the training of a graduate student at the University of Connecticut and an undergraduate student at the University of South Carolina. It will also provide a postdoctoral fellow the opportunity to apply computational skills in regional modeling and machine learning, offering preparation for a career in academia or industry. The project will contribute to undergraduate education and communication of climate change science to the general public and policymakers through the incorporation of the study methodology into an undergraduate Service Learning course at the University of Connecticut.</p> <p>This work seeks to provide estimates of the regional flux of nitrous oxide to the atmosphere, to examine seasonal dynamics, to assess the biological pathways to nitrous oxide production and consumption, and to query regional and large scale forcings on nitrous oxide dynamics in the SBUS. To this end, the team will (a) measure nitrous oxide concentrations in samples collected in the SBUS during seasonal surveys, measure surface nitrous oxide continuously underway, and derive robust estimates of the sea-to-air flux of nitrous oxide from coincident windspeed; (b) query nitrous oxide production and consumption pathways from measurements of the nitrogen and oxygen isotope ratios of nitrous oxide and nitrate, and investigate environmental correlates of nitrous oxide cycling; (c) develop regional machine learning models for nitrous oxide from these measurements to investigate environmental drivers of seasonal and inter-annual nitrous oxide dynamics, predicting nitrous oxide in the SBUS with historical data and with hydrographic fields derived from a regional dynamical ocean model. The work will give insights into pathways of nitrous oxide production and consumption in an eastern boundary upwelling system bounded by a broad continental shelf – contrasting the greater body of knowledge obtained from active margins. The statistical nitrous oxide models borne of machine learning will ultimately serve to predict nitrous oxide from climate projections of the SBUS, and to anticipate the regional response of nitrous oxide to global ocean de-oxygenation.</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> SBUS N2O largerWorkCitation project eng; USA oceans 16.43233333 18.30633333 -32.7433 -32.3022 2017-02-23 2017-02-24 Southern and Northern Benguela Upwelling System 0 BCO-DMO catalogue of parameters from Nutrient, CTD Profile, and Nitrous oxide data from the Southern Benguela Upwelling System (Integrated Environmental Programme, February 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/969268.rdf Name: Cruise_ID Units: unitless Description: <p>Internal Cruise name</p> http://lod.bco-dmo.org/id/dataset-parameter/969269.rdf Name: Station_ID Units: unitless Description: <p>Sampling Station</p> http://lod.bco-dmo.org/id/dataset-parameter/969270.rdf Name: ISO_DateTime_GMT Units: unitless Description: <p>Date and time in ISO 8601 format</p> http://lod.bco-dmo.org/id/dataset-parameter/969271.rdf Name: Date Units: unitless Description: <p>Date of station</p> http://lod.bco-dmo.org/id/dataset-parameter/969272.rdf Name: Time Units: unitless Description: <p>Time of station</p> http://lod.bco-dmo.org/id/dataset-parameter/969273.rdf Name: Latitude Units: Degrees North Description: <p>Latitude</p> http://lod.bco-dmo.org/id/dataset-parameter/969274.rdf Name: Longitude Units: Degrees East Description: <p>Longitude</p> http://lod.bco-dmo.org/id/dataset-parameter/969275.rdf Name: Bottom_depth Units: meters (m) Description: <p>Depth of water colum</p> http://lod.bco-dmo.org/id/dataset-parameter/969276.rdf Name: Pressure Units: decibars (db) Description: <p>Pressure</p> http://lod.bco-dmo.org/id/dataset-parameter/969277.rdf Name: Depth Units: meters (m) Description: <p>Depth of sample</p> http://lod.bco-dmo.org/id/dataset-parameter/969278.rdf Name: Temperature Units: degrees Celsius Description: <p>Temperature</p> http://lod.bco-dmo.org/id/dataset-parameter/969279.rdf Name: Salinity Units: practical salinity units (PSU) Description: <p>Salinity</p> http://lod.bco-dmo.org/id/dataset-parameter/969280.rdf Name: Oxygen_mL_L Units: milliliters per liter (mL/L) Description: <p>Dissolved oxygen</p> http://lod.bco-dmo.org/id/dataset-parameter/969281.rdf Name: Oxygen_umol_kg Units: micromole per kg Description: <p>Dissolved oxygen</p> http://lod.bco-dmo.org/id/dataset-parameter/969282.rdf Name: Nitrate Units: micromolar (uM) Description: <p>Nitrate concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969283.rdf Name: Nitrite Units: micromolar (uM) Description: <p>Nitrite concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969284.rdf Name: Phosphate Units: micromolar (uM) Description: <p>Phosphate concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969285.rdf Name: Silicate Units: micromolar (uM) Description: <p>Silicate concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969286.rdf Name: N2O_equilibrium Units: nanomolar (nM) Description: <p>Gas equilibrium concentration of N2O at specific temperature/salinity/pressure</p> http://lod.bco-dmo.org/id/dataset-parameter/969287.rdf Name: N2O Units: nanomolar (nM) Description: <p>Measured N2O concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969288.rdf Name: D_N2O Units: nanomolar (nM) Description: <p>N2O equilibrium - measured N2O concentration</p> http://lod.bco-dmo.org/id/dataset-parameter/969289.rdf Name: d15N_N2O Units: per mille (‰) Description: <p>d15N-(bulk) value of N2O (vs. AIR)</p> http://lod.bco-dmo.org/id/dataset-parameter/969290.rdf Name: d18O_N2O Units: per mille (‰) Description: <p>d18O value of N2O (vs. VSMOW)</p> http://lod.bco-dmo.org/id/dataset-parameter/969291.rdf Name: d15N_Nitrate Units: per mille (‰) Description: <p>d15N value of Nitrate (vs. AIR)</p> http://lod.bco-dmo.org/id/dataset-parameter/969292.rdf Name: d18O_Nitrate Units: per mille (‰) Description: <p>d18O value of Nitrate (vs. VSMOW)</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 450195 https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/97ba959d-8a9e-4882-b28f-8910c2e2a0af/content download https://doi.org/10.26008/1912/bco-dmo.969121.1 download onLine dataset &lt;p&gt;Seawater samples were collected during a South African Department of Forestry, Fisheries and Environment (DFFE) Integrated Ecosystem Programme cruise aboard the &lt;em&gt;FRV Mirabilis&lt;/em&gt; in February 2017 along 14 stations across the St Helena Bay Monitoring Line (~32.5°S) and the Columbine upwelling cell. Hydrographic profiles were obtained using a Sea-Bird SBE 911 CTD with oxygen sensors and 12 x 6-liter (L) Niskin bottles. Oxygen sensors were calibrated against discrete Winkler titrations. Seawater for nutrient analysis (NO₃⁻+NO₂⁻, NO₂⁻, PO₄³⁻, Si(OH)₄) was collected following GO-SHIP protocols, frozen at -20 degrees Celsius (°C), and analyzed using flow injection analysis (FIA) and manual colorimetric methods. NH₄⁺ was determined fluorometrically using OPA derivatization immediately after collection.&lt;/p&gt; &lt;p&gt;N₂O samples were collected in 125-milliliter (mL) gas-tight glass bottles, preserved with saturated HgCl₂, and stored inverted at room temperature. Concentrations and isotopic compositions (δ¹⁵N-N₂O and δ¹⁸O-N₂O) were determined using a continuous-flow isotope ratio mass spectrometer (CF-MC-IRMS) following Bourbonnais et al. (2017) and McIlvin &amp;amp; Casciotti (2011). Calibration included internal seawater standards and N₂O reference gases spanning a wide isotopic range. Derived variables include apparent oxygen utilization (AOU), N-deficit (based on AOU–NO₃⁻ stoichiometry), and N₂O saturation disequilibrium (ΔN₂O), with equilibrium concentrations estimated from Weiss &amp;amp; Price (1980) using atmospheric N₂O histories from Liu &amp;amp; Tanhua (2024).&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;Data were processed using Ocean Data View (Schlitzer, 2016).&lt;/p&gt; Specified by the Principal Investigator(s) - Imported original file &quot;Wallschuss_data.xlsx&quot; into the BCO-DMO system. - Marked &quot;#N/A&quot; as a missing data value (note that missing data are empty/blank in the final CSV file). - Renamed fields to comply with BCO-DMO naming conventions. - Converted Date column to YYYY-MM-DD format. - Created date-time column in ISO 8601 format. - Saved the final file as &quot;969121_v1_n2o_isotopes.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 Sea-Bird Electronics SBE 911plus CTD system Sea-Bird Electronics SBE 911plus CTD system PI Supplied Instrument Name: Sea-Bird Electronics SBE 911plus CTD system PI Supplied Instrument Description:CTD Rosette: Sea-Bird Electronics SBE 911plus CTD system equipped with a Sea-Bird SBE 43 dissolved oxygen sensor and a 12-bottle rosette sampler (12 × 6-L Niskin bottles). Temperature and conductivity sensors were calibrated annually by the manufacturer. The oxygen sensor was calibrated against discrete Winkler titration measurements. Instrument Name: CTD Sea-Bird SBE 911plus Instrument Short Name:CTD SBE 911plus Instrument Description: The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/ GV Instruments IsoPrime Continuous Flow Multi-Collector Isotope Ratio Mass Spectrometer (CF-MC-IRMS) GV Instruments IsoPrime Continuous Flow Multi-Collector Isotope Ratio Mass Spectrometer (CF-MC-IRMS) PI Supplied Instrument Name: GV Instruments IsoPrime Continuous Flow Multi-Collector Isotope Ratio Mass Spectrometer (CF-MC-IRMS) PI Supplied Instrument Description:N₂O Isotopic and Concentration Analysis: GV Instruments IsoPrime Continuous Flow Multi-Collector Isotope Ratio Mass Spectrometer (CF-MC-IRMS), coupled to a custom-built automated gas extraction and cryogenic purification system, used for δ¹⁵N and δ¹⁸O analysis of dissolved N₂O. Instrument Name: GV Instruments IsoPrime Isotope Ratio Mass Spectrometer Instrument Short Name:IsoPrime IRMS Instrument Description: The GV Instruments IsoPrime Isotope Ratio Mass Spectrometer is a laboratory benchtop isotope ratio mass spectrometer (IRMS), that operates in dual inlet or continuous flow modes. It forms part of the IsoPrime system which has a range of sample preparation and purification modules that can be coupled with the IsoPrime IRMS. The modules can analyse a range of samples (solids, liquids or gases) and each prepares the sample to be introduced into the IRMS as purified gases. The resultant prepared gases such as H2, CO2, CO, N2, SO2 or N2O are then ionised and analysed for their isotopic content by the IRMS. The instrument was originally manufactured GV instruments as part of the IsoPrime series, but this part of the business was sold to Isoprime Ltd (a group member of Elementar Analysensysteme GmbH) and this instrument has been superseded by more recent models. Lachat QuickChem® 8500 Series 2 Lachat QuickChem® 8500 Series 2 PI Supplied Instrument Name: Lachat QuickChem® 8500 Series 2 PI Supplied Instrument Description:Flow Injection Autoanalyzer: Lachat QuickChem® 8500 Series 2, used for nitrate + nitrite (NO₃⁻+NO₂⁻) and silicic acid (Si(OH)₄) analysis. Standards and a certified reference material (JAMSTEC) were used for drift correction and validation. Instrument Name: Lachat QuikChem 8500 flow injection analysis system Instrument Short Name:QuikChem 8500 Instrument Description: The Lachat QuikChem 8500 Series 2 Flow Injection Analysis System features high sample throughput and simple, but rapid, method changeover. The QuikChem 8500 Series 2 system maximises productivity in determining ionic species in a variety of sample types, from sub-ppb to percent concentrations. Analysis takes 20 to 60 seconds, with a sample throughput of 60 to 120 samples per hour. 6-L Niskin bottles 6-L Niskin bottles PI Supplied Instrument Name: 6-L Niskin bottles PI Supplied Instrument Description:CTD Rosette: Sea-Bird Electronics SBE 911plus CTD system equipped with a Sea-Bird SBE 43 dissolved oxygen sensor and a 12-bottle rosette sampler (12 × 6-L Niskin bottles). Temperature and conductivity sensors were calibrated annually by the manufacturer. The oxygen sensor was calibrated against discrete Winkler titration measurements. Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument Description: A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/ Sea-Bird SBE 43 Sea-Bird SBE 43 PI Supplied Instrument Name: Sea-Bird SBE 43 PI Supplied Instrument Description:CTD Rosette: Sea-Bird Electronics SBE 911plus CTD system equipped with a Sea-Bird SBE 43 dissolved oxygen sensor and a 12-bottle rosette sampler (12 × 6-L Niskin bottles). Temperature and conductivity sensors were calibrated annually by the manufacturer. The oxygen sensor was calibrated against discrete Winkler titration measurements. 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/ Thermo Scientific Genesis 30 Visible Thermo Scientific Genesis 30 Visible PI Supplied Instrument Name: Thermo Scientific Genesis 30 Visible PI Supplied Instrument Description:Spectrophotometer: Thermo Scientific Genesis 30 Visible, used for colorimetric determination of nitrite (NO₂⁻) and phosphate (PO₄³⁻). 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/ Turner Designs Trilogy Turner Designs Trilogy PI Supplied Instrument Name: Turner Designs Trilogy PI Supplied Instrument Description:Ammonium Analysis: Turner Designs Trilogy fluorometer with a UV module, used for NH₄⁺ detection via OPA derivatization. Instrument Name: Turner Designs Trilogy fluorometer Instrument Short Name:Turner Trilogy Instrument Description: The Trilogy Laboratory Fluorometer is a compact laboratory instrument for making fluorescence, absorbance, and turbidity measurements using the appropriate snap-in application module. Fluorescence modules are available for discrete sample measurements of various fluorescent materials including chlorophyll (in vivo and extracted), rhodamine, fluorescein, cyanobacteria pigments, ammonium, CDOM, optical brighteners, and other fluorescent compounds.