http://lod.bco-dmo.org/id/dataset/1010349
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
2026-10-20
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Biogeochemistry from submarine groundwater discharge in Mo'orea, French Polynesia from August 2021 to March 2022
2026-10-20
publication
2026-10-20
revision
BCO-DMO Linked Data URI
2026-10-20
creation
http://lod.bco-dmo.org/id/dataset/1010349
Nyssa Silbiger
California State University Northridge
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: Silbiger, N. (2026) Biogeochemistry from submarine groundwater discharge in Mo'orea, French Polynesia from August 2021 to March 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-10-20 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/1010349 [access date]
Methods and Sampling: <p><strong>Water sample collection</strong></p>
<p>Field sampling was conducted at Cabral and Varari, two fringing coral reef sites on the western coast of Mo'orea, French Polynesia, during the dry season (August 2021) and wet season (March 2022). Discrete seawater samples were collected approximately 20 cm above the benthos using acid-washed high-density polyethylene (HDPE) bottles or a Subsurface Automated Sampler (SAS) following Enochs et al. (2020). Sampling locations included reef sites, submarine groundwater discharge (SGD) seepage points, and inland groundwater sources. Geographic coordinates were recorded for each sampling location, and samples were collected across seasonal, tidal, and spatial gradients to characterize the influence of submarine groundwater discharge on reef biogeochemistry.</p>
<p>&nbsp;</p>
<p>Samples collected for nutrient and fluorescent dissolved organic matter (fDOM) analyses were filtered through 0.22 µm Sterivex filters either in situ prior to entering acid-washed Mylar bags within the SAS or immediately after collection using sterile syringes. Nutrient samples were stored frozen (-20°C) in 50 mL Falcon tubes until analysis. fDOM samples were stored refrigerated (4°C) in amber glass bottles and analyzed within two months of collection.</p>
<p>Samples for total alkalinity (TA) were collected into Tedlar bags pre-fixed with 50% saturated HgCl₂ in deionized water or fixed immediately after collection. Samples were transferred to amber HDPE bottles and stored in a cool, dark environment until analysis. Groundwater and low-salinity samples (salinity &lt;20) were collected in duplicate following Mos et al. (2021), with one sample preserved using HgCl₂ and one filtered and refrigerated. Differences between preservation methods were consistently less than 5 µmol kg⁻¹, and preserved samples were used in all analyses.</p>
<p>&nbsp;</p>
<p>Salinity and pH were measured immediately after collection. pH was measured on the total hydrogen ion concentration scale (pHT) using a Tris-calibrated glass electrode following Dickson Standard Operating Procedure (SOP) 6a. In situ temperature was measured using conductivity-temperature loggers deployed at each study site, and in situ pH was subsequently back-calculated using the seacarb package in R. Salinity was measured immediately after collection using a conductivity electrode. All sample containers and analytical vials were acid washed and rinsed three times with sample water prior to use.</p>
<p>&nbsp;</p>
<p><strong>Laboratory analyses</strong></p>
<p>Dissolved inorganic nutrients (NOx, NH₄⁺, SiO₃²⁻, and PO₄³⁻) were analyzed using a Seal Analytical AA3 nutrient autoanalyzer at the University of Hawaiʻi School of Ocean and Earth Science and Technology (SOEST) Laboratory for Analytical Biogeochemistry. Analytical precision (coefficient of variation) was approximately 0.3% for NOx, 1.3% for NH₄⁺, 0.5% for SiO₃²⁻, and 0.2% for PO₄³⁻.</p>
<p>&nbsp;</p>
<p>Fluorescent dissolved organic matter (fDOM) was analyzed on 0.22 µm filtered seawater using a HORIBA Aqualog three-dimensional scanning fluorometer following Nelson et al. (2015). Fluorescence excitation-emission matrices (EEMs) were processed to quantify individual fluorescence components. For statistical analyses, fluorescence peaks were grouped into Humics (Marine Humic-Like and Visible Humic-Like fluorescence) and Proteinaceous (Tryptophan-Like and Tyrosine-Like fluorescence) following Coble et al. (2014).</p>
<p>&nbsp;</p>
<p>Total alkalinity was measured using a Mettler-Toledo T5 automatic titrator following Dickson SOP 3b. Instrument accuracy was verified daily using Certified Reference Material supplied by the A. G. Dickson laboratory at Scripps Institution of Oceanography, with analytical accuracy better than 5 µmol kg⁻¹.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1924281 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1924281
onGoing
Nyssa Silbiger
California State University Northridge
818-677-2901
HI
USA
silbiger@hawaii.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Location
Lat
Long
LocationID
Plate_Seep
Date_Local
Time_Local
ISO_DateTime_UTC
Tide
Salinity
Temperature
TA_umol_kg
pH_t
Phosphate_umolL
Silicate_umolL
NN_umolL
Ammonia_umolL
MarineHumic_Like
VisibleHumidic_Like
Tryptophan_Like
Tyrosine_Like
Season
Seal Analytical AA3 Nutrient Autoanalyzer
Orion Star Multimeter with DuraProbe Conductivity Electrode
Traceable Digital Thermometer
Subsurface Automated Sampler (Custom Build)
HORIBA Aqualog 3-D Scanning Fluorometer
HOBO Conductivity/Temperature Logger
Thermo Scientific Orion ROSS Ultra pH/ATC Triode
Mettler-Toledo Automatic Titrator
theme
None, User defined
region
latitude
longitude
Site_ID
site description
date_local
time_local
ISO_DateTime_UTC
tide
salinity
water temperature at measurement depth
total alkalinity (TA)
pH
phosphate
Silicate, Si(OH)4, silicic acid
delta 15N NO3+NO2
Ammonia
fluorescence
season
featureType
BCO-DMO Standard Parameters
Bran+Luebbe / SEAL Analytical AutoAnalyzer 3 (AA3) continuous-flow analyzer
Conductivity Meter
digital thermometer
Discrete water sampler
Fluorometer
Onset HOBO Saltwater Conductivity/Salinity data logger U24-002-C
pH Sensor
Titrator
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.
RUI: Collaborative Research: Defining the biogeochemical context and ecological impacts of submarine groundwater discharge on coral reefs
https://osprey.bco-dmo.org/project/820158
RUI: Collaborative Research: Defining the biogeochemical context and ecological impacts of submarine groundwater discharge on coral reefs
<p><em>NSF Award Abstract:</em><br />
Submarine groundwater discharge (SGD) is the flow of water from land through the coastal seafloor into the nearby ocean. Approximately 13,000 cubic kilometers of groundwater is discharged into coastal environments every year, yet the effects of this fresh and often nutrient rich SGD are still poorly understood for coral reefs. This SGD input is driven by changes in precipitation, human land use, sea-level rise, tidal amplitude, and groundwater usage, many of which are rapidly changing with climate and human impacts. This project improves our understanding of SGD effects on coral reefs to better predict how both natural and human-induced changes will affect coastal ecosystem functioning in the future. Working in one of the most comprehensively studied coral reef ecosystems in the Pacific (Mo'orea, French Polynesia, home of the Mo'orea Coral Reef Ecosystem LTER); this project tests the influence of SGD on individual, community, and ecosystem-scale coral reef processes. Using mensurative studies, caging experiments, and a synthetic model, the investigators: 1) characterize SGD gradients and relate it to high resolution coral reef cover data, 2) determine how individual to ecosystem processes are influenced by SGD, and 3) develop a synthetic model to show how changes in SGD fluxes will alter reef ecosystem functioning. As SGD is a common feature on nearshore coral reefs worldwide, the results of this study have global implications for understanding the performance of coral reefs, which are essential economic, cultural, and scientific resources. This project is structured to provide training across multiple career levels, linking 13 undergraduate students, 2 graduate students, 2 senior personnel, 1 postdoctoral researcher, 1 female beginning lead investigator, and 2 senior co-investigators, with a focus on encouraging participation from underrepresented groups (e.g., through the Alaska Native and Native Hawaiian, Asian American and Native American Pacific Islander, and Hispanic-Serving Institutions of California State University Northridge, the University of Hawaiʻi at Mānoa, and California State University Long Beach). The investigators work with local K-12 students and teachers in Mo'orea and collaborate with an artist-in-residence to communicate science to the broader public through interactive and immersive art experiences in Mo'orea, Miami, and Los Angeles.</p>
<p>SGD is a natural and understudied feature of many nearshore coral reef ecosystems, which can contribute substantial changes to marine biogeochemistry, with impacts for coastal organisms such as reef-building corals, macroalgae, and bioeroders. SGD may play a key role in coral reef ecosystem functioning because it alters key physicochemical parameters (e.g., temperature, salinity, and nutrient and carbonate chemistry) that substantially affect both biotic and abiotic processes on coral reefs. This project (i) characterizes the spatial extent and biogeochemical signal of SGD in Mo'orea, French Polynesia, (ii) identifies how SGD influences microbial processes, benthic organism growth rates and physiology, species interactions between corals, macroalgae, and herbivores, and net ecosystem calcification and production rates, and (iii) quantitatively assesses how changes in SGD fluxes will alter reef biogeochemistry and ecosystem functioning through an integrative modelling effort. Specifically, the hydrogeological, biogeochemical, and ecological data collected in this study are synthesized in a Bayesian structural equation model. This project characterizes and quantifies how SGD directly and indirectly affects ecosystem functioning via changes in biogeochemistry and altered individual to ecosystem responses, thereby providing a better capacity to track and predict alterations in reef ecosystem function.</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>
Moorea SGD
largerWorkCitation
project
eng; USA
oceans
-149.914
-149.899
-17.5411
-17.5155
2021-08-04
2022-03-31
Mo'orea, French Polynesia
0
BCO-DMO catalogue of parameters from Biogeochemistry from submarine groundwater discharge in Mo'orea, French Polynesia from August 2021 to March 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/1010392.rdf
Name: Location
Units: unitless
Description: <p>Name of the Mo'orea sampling site. Values identify the primary field site associated with the sample (Cabral or Varari).</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010393.rdf
Name: Lat
Units: decimal degrees
Description: <p>Latitude of the sampling location in decimal degrees; negative values indicate degrees south.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010395.rdf
Name: Long
Units: decimal degrees
Description: <p>Longitude of the sampling location in decimal degrees; negative values indicate degrees west.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010397.rdf
Name: LocationID
Units: unitless
Description: <p>Unique alphanumeric identifier for the individual reef plate location, seepage point, spring, beach pit, or other sampled location within a site.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010398.rdf
Name: Plate_Seep
Units: unitless
Description: <p>Sampling-location category indicating whether the sample was collected at an experimental reef plate location, submarine groundwater discharge seep, spring, beach pit, offshore/reference location, or another location type represented in the data.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010399.rdf
Name: Date_Local
Units: yyyy-mm-dd
Description: <p>Calendar date on which the water sample was collected in local time (TAHT (Tahiti Time)).</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010400.rdf
Name: Time_Local
Units: HH:MM:SS
Description: <p>Local time of water-sample collection in Mo'orea, French Polynesia (TAHT (Tahiti Time)).</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010401.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Datetime of water-sample collection in UTC. This column was created from the Date_Local and Time_Local columns, and values were converted from Tahiti Local Time to UTC.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010403.rdf
Name: Tide
Units: unitless
Description: <p>Tidal category at the time of sample collection. Values are High or Low; NA is used when a tidal category was not applicable or unavailable.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010404.rdf
Name: Salinity
Units: PSU
Description: <p>Salinity measured immediately after sample collection using a DuraProbe 4-cell conductivity electrode connected to a Thermo Scientific Orion Star multimeter.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010405.rdf
Name: Temperature
Units: degrees Celsius
Description: <p>In situ water temperature measured with an Onset HOBO U24-002-C conductivity/temperature logger.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010406.rdf
Name: TA_umol_kg
Units: micromoles per kilogram
Description: <p>Total alkalinity of the water sample. Samples were analyzed using a Mettler-Toledo T5 automatic titrator following Dickson SOP 3b; accuracy was verified daily with Dickson certified reference material and was better than 5 micromoles per kilogram.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010407.rdf
Name: pH_t
Units: unitless
Description: <p>Seawater pH on the total hydrogen ion concentration scale. pH was measured with a Tris-calibrated Thermo Scientific Orion ROSS Ultra pH/ATC Triode following Dickson SOP 6a and adjusted to in situ temperature using the seacarb R package.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010408.rdf
Name: Phosphate_umolL
Units: micromoles per liter
Description: <p>Concentration of dissolved inorganic phosphate (PO4^3-) in 0.22-micrometer-filtered water, measured with a Seal Analytical AA3 nutrient autoanalyzer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010409.rdf
Name: Silicate_umolL
Units: micromoles per liter
Description: <p>Concentration of dissolved silicate (reported as SiO3^2-) in 0.22-micrometer-filtered water, measured with a Seal Analytical AA3 nutrient autoanalyzer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010410.rdf
Name: NN_umolL
Units: micromoles per liter
Description: <p>Concentration of nitrate plus nitrite (NOx) in 0.22-micrometer-filtered water, measured with a Seal Analytical AA3 nutrient autoanalyzer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010411.rdf
Name: Ammonia_umolL
Units: micromoles per liter
Description: <p>Concentration of Ammonia (NH4+) in 0.22-micrometer-filtered water, measured with a Seal Analytical AA3 nutrient autoanalyzer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010412.rdf
Name: MarineHumic_Like
Units: Raman units
Description: <p>Marine humic-like fluorescent dissolved organic matter component measured from excitation-emission matrices of 0.22-micrometer-filtered water using a HORIBA Aqualog 3-D scanning fluorometer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010413.rdf
Name: VisibleHumidic_Like
Units: Raman units
Description: <p>Visible humic-like fluorescent dissolved organic matter component measured from excitation-emission matrices of 0.22-micrometer-filtered water using a HORIBA Aqualog 3-D scanning fluorometer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010414.rdf
Name: Tryptophan_Like
Units: Raman units
Description: <p>Tryptophan-like, proteinaceous fluorescent dissolved organic matter component measured from excitation-emission matrices of 0.22-micrometer-filtered water using a HORIBA Aqualog 3-D scanning fluorometer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010415.rdf
Name: Tyrosine_Like
Units: Raman units
Description: <p>Tyrosine-like, proteinaceous fluorescent dissolved organic matter component measured from excitation-emission matrices of 0.22-micrometer-filtered water using a HORIBA Aqualog 3-D scanning fluorometer.</p>
http://lod.bco-dmo.org/id/dataset-parameter/1010416.rdf
Name: Season
Units: unitless
Description: <p>Seasonal sampling period. Dry-season sampling occurred in August 2021 and wet-season sampling occurred in March 2022.</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
https://osprey.bco-dmo.org/dataset/1010349/data/download
download
onLine
dataset
<p><strong>Water sample collection</strong></p>
<p>Field sampling was conducted at Cabral and Varari, two fringing coral reef sites on the western coast of Mo'orea, French Polynesia, during the dry season (August 2021) and wet season (March 2022). Discrete seawater samples were collected approximately 20 cm above the benthos using acid-washed high-density polyethylene (HDPE) bottles or a Subsurface Automated Sampler (SAS) following Enochs et al. (2020). Sampling locations included reef sites, submarine groundwater discharge (SGD) seepage points, and inland groundwater sources. Geographic coordinates were recorded for each sampling location, and samples were collected across seasonal, tidal, and spatial gradients to characterize the influence of submarine groundwater discharge on reef biogeochemistry.</p>
<p>&nbsp;</p>
<p>Samples collected for nutrient and fluorescent dissolved organic matter (fDOM) analyses were filtered through 0.22 µm Sterivex filters either in situ prior to entering acid-washed Mylar bags within the SAS or immediately after collection using sterile syringes. Nutrient samples were stored frozen (-20°C) in 50 mL Falcon tubes until analysis. fDOM samples were stored refrigerated (4°C) in amber glass bottles and analyzed within two months of collection.</p>
<p>Samples for total alkalinity (TA) were collected into Tedlar bags pre-fixed with 50% saturated HgCl₂ in deionized water or fixed immediately after collection. Samples were transferred to amber HDPE bottles and stored in a cool, dark environment until analysis. Groundwater and low-salinity samples (salinity &lt;20) were collected in duplicate following Mos et al. (2021), with one sample preserved using HgCl₂ and one filtered and refrigerated. Differences between preservation methods were consistently less than 5 µmol kg⁻¹, and preserved samples were used in all analyses.</p>
<p>&nbsp;</p>
<p>Salinity and pH were measured immediately after collection. pH was measured on the total hydrogen ion concentration scale (pHT) using a Tris-calibrated glass electrode following Dickson Standard Operating Procedure (SOP) 6a. In situ temperature was measured using conductivity-temperature loggers deployed at each study site, and in situ pH was subsequently back-calculated using the seacarb package in R. Salinity was measured immediately after collection using a conductivity electrode. All sample containers and analytical vials were acid washed and rinsed three times with sample water prior to use.</p>
<p>&nbsp;</p>
<p><strong>Laboratory analyses</strong></p>
<p>Dissolved inorganic nutrients (NOx, NH₄⁺, SiO₃²⁻, and PO₄³⁻) were analyzed using a Seal Analytical AA3 nutrient autoanalyzer at the University of Hawaiʻi School of Ocean and Earth Science and Technology (SOEST) Laboratory for Analytical Biogeochemistry. Analytical precision (coefficient of variation) was approximately 0.3% for NOx, 1.3% for NH₄⁺, 0.5% for SiO₃²⁻, and 0.2% for PO₄³⁻.</p>
<p>&nbsp;</p>
<p>Fluorescent dissolved organic matter (fDOM) was analyzed on 0.22 µm filtered seawater using a HORIBA Aqualog three-dimensional scanning fluorometer following Nelson et al. (2015). Fluorescence excitation-emission matrices (EEMs) were processed to quantify individual fluorescence components. For statistical analyses, fluorescence peaks were grouped into Humics (Marine Humic-Like and Visible Humic-Like fluorescence) and Proteinaceous (Tryptophan-Like and Tyrosine-Like fluorescence) following Coble et al. (2014).</p>
<p>&nbsp;</p>
<p>Total alkalinity was measured using a Mettler-Toledo T5 automatic titrator following Dickson SOP 3b. Instrument accuracy was verified daily using Certified Reference Material supplied by the A. G. Dickson laboratory at Scripps Institution of Oceanography, with analytical accuracy better than 5 µmol kg⁻¹.</p>
Specified by the Principal Investigator(s)
<p>This data and code package available at Zenodo supports the results publication (Silbiger et al., 2025, Ecological Monographs). The repository contains R scripts for data processing, Bayesian structural equation modeling, and figure generation, along with associated output files. The dry and wet season discrete water-sample datasets in the repository are derived from the biogeochemical observations in this BCO-DMO dataset. See the references of this dataset to find a link to this Zenodo software holding.</p>
Specified by the Principal Investigator(s)
Curation Actions Performed on Data File
- "NA" treated as missing data values and converted to blank values in the data file.
- Converted Date from %m/%d/%Y to %Y-%m-%d.
- Created ISO_DateTime_UTC by combining Date and Time, interpreting the values as Pacific/Tahiti local time, converting them to UTC, and formatting the result as %Y-%m-%dT%H:%M:%SZ.
- Renamed Date to Date_Local and Time to Time_Local.
- Set column types: string for Location, LocationID, Plate_Seep, Tide, and Season; number for Lat, Long, Salinity, Temperature, TA_umol_kg, pH_t, Phosphate_umolL, Silicate_umolL, NN_umolL, Ammonia_umolL, MarineHumic_Like, VisibleHumidic_Like, Tryptophan_Like, and Tyrosine_Like; date for Date_Local; time for Time_Local; and datetime for ISO_DateTime_UTC.
- Updated metadata for all columns, including descriptions, standard name IDs, and supplied units.
- Marked ISO_DateTime_UTC, Lat, and Long as primary parameters.
- Saved the final table as 1010349_v1_submarine_groundwater_discharge_biogeochemistry_data.csv.
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
Seal Analytical AA3 Nutrient Autoanalyzer
Seal Analytical AA3 Nutrient Autoanalyzer
PI Supplied Instrument Name: Seal Analytical AA3 Nutrient Autoanalyzer PI Supplied Instrument Description:Manufacturer: Seal Analytical
Model: AA3 Continuous Flow AutoAnalyzer
Purpose: Determination of nitrate + nitrite (NOx), ammonium (NH₄⁺), phosphate (PO₄³⁻), and silicate (SiO₃²⁻).
Calibration: Multi-point calibration using certified nutrient standards. Analytical precision was approximately 0.3% (NOx), 1.3% (NH₄⁺), 0.5% (SiO₃²⁻), and 0.2% (PO₄³⁻).
Instrument Name: Bran+Luebbe / SEAL Analytical AutoAnalyzer 3 (AA3) continuous-flow analyzer Instrument Short Name:AA3 AutoAnalyzer Instrument Description: The AutoAnalyzer 3 (AA3) is a segmented continuous-flow analyzer (continuous flow analyzer, CFA) used for automated colorimetric analysis of dissolved nutrients and other analytes in environmental, seawater, freshwater, wastewater, soil, and agricultural samples. The AA3 was originally manufactured by Bran+Luebbe and, following acquisition of the product line in 2006, has continued to be manufactured and supported by SEAL Analytical. The AA3 is the third-generation instrument in the Technicon AutoAnalyzer family and is widely used for determination of nitrate, nitrite, ammonium, phosphate, silicate, and other dissolved nutrients. See the description from the manufacturer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/
Orion Star Multimeter with DuraProbe Conductivity Electrode
Orion Star Multimeter with DuraProbe Conductivity Electrode
PI Supplied Instrument Name: Orion Star Multimeter with DuraProbe Conductivity Electrode PI Supplied Instrument Description:Manufacturer: Thermo Fisher Scientific
Model: Orion Star Meter with DuraProbe 4-cell Conductivity Probe
Purpose: Measurement of seawater salinity immediately following sample collection.
Calibration: Conductivity probe calibrated according to manufacturer recommendations prior to field sampling.
Measurement specifications: Conductivity accuracy ±0.5% of reading (±1 digit); conductivity resolution 0.001 µS cm⁻¹ (minimum, auto-ranging); salinity resolution 0.01 PSU; salinity accuracy ±0.5% of reading (±1 digit); temperature accuracy ±0.1°C. Instrument Name: Conductivity Meter Instrument Short Name:Conductivity Meter Instrument Description: Conductivity Meter - An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. Commonly used in hydroponics, aquaculture and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.
Traceable Digital Thermometer
Traceable Digital Thermometer
PI Supplied Instrument Name: Traceable Digital Thermometer PI Supplied Instrument Description:Manufacturer: Control Company
Model: 5-077-8
Accuracy: ±0.05 °C
Resolution: 0.001 °C
Purpose: Temperature measurement during pH analyses. Instrument Name: digital thermometer Instrument Short Name: Instrument Description: An instrument that measures temperature digitally.
Subsurface Automated Sampler (Custom Build)
Subsurface Automated Sampler (Custom Build)
PI Supplied Instrument Name: Subsurface Automated Sampler (Custom Build) PI Supplied Instrument Description:Manufacturer: Custom-built instrument described by Enochs et al. (2020)
Model: Subsurface Automated Sampler (SAS)
Purpose: Used to collect discrete seawater samples underwater during selected sampling periods.
Calibration: Sampling system; no sensor calibration required.
Instrument Name: Discrete water sampler Instrument Short Name: Instrument Description: A device that collects an in-situ discrete water sample from any depth and returns it to the surface without contamination by the waters through which it passes, such as a water bottle.
HORIBA Aqualog 3-D Scanning Fluorometer
HORIBA Aqualog 3-D Scanning Fluorometer
PI Supplied Instrument Name: HORIBA Aqualog 3-D Scanning Fluorometer PI Supplied Instrument Description:Manufacturer: HORIBA Scientific
Model: Aqualog® 3-D Scanning Fluorometer
Purpose: Collection of excitation-emission matrices (EEMs) and quantification of Marine Humic-Like, Visible Humic-Like, Tryptophan-Like, and Tyrosine-Like fluorescence.
Calibration: Instrument-specific excitation and emission corrections, Raman normalization, and blank subtraction were applied according to laboratory protocols. Instrument Name: Fluorometer Instrument Short Name:Fluorometer Instrument Description: A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/113/
HOBO Conductivity/Temperature Logger
HOBO Conductivity/Temperature Logger
PI Supplied Instrument Name: HOBO Conductivity/Temperature Logger PI Supplied Instrument Description:Manufacturer: Onset Computer Corporation
Model: U24-002-C
Conductivity accuracy: ±3% of reading or 50 µS/cm (low range), ±5% of reading within ±3,000 µS/cm of the calibration point (high range); conductivity resolution (precision): 2 µS/cm; temperature accuracy: ±0.1°C; and resolution: 0.01 °C
Purpose: In situ temperature measurements used to calculate carbonate chemistry. Instrument Name: Onset HOBO Saltwater Conductivity/Salinity data logger U24-002-C Instrument Short Name:Onset HOBO U24-002-C conductivity logger Instrument Description: HOBO Salt Water Conductivity/Salinity Data Logger is a cost-effective data logger for measuring cost-effective data logger for measuring salinity, conductivity, and temperature in saltwater environments with relatively small changes in salinity (±5,000 μS/cm) such as saltwater bays, or to detect salinity events such as upwelling, rainstorm, and discharge events.
Thermo Scientific Orion ROSS Ultra pH/ATC Triode
Thermo Scientific Orion ROSS Ultra pH/ATC Triode
PI Supplied Instrument Name: Thermo Scientific Orion ROSS Ultra pH/ATC Triode PI Supplied Instrument Description:Manufacturer: Thermo Fisher Scientific
Model: Orion™ ROSS Ultra pH/ATC Triode
Purpose: Measurement of seawater pH on the total hydrogen ion concentration scale (pHT).
Calibration: Tris-buffer calibration following Dickson SOP 6a
Measurement specifications: mV range ±2000.0 mV; mV resolution 0.1 mV; mV accuracy ±0.2 mV or ±0.05% of reading (whichever is greater). The meter provides pH accuracy of ±0.002 pH with a resolution of up to 0.001 pH. Instrument Name: pH Sensor Instrument Short Name:pH Sensor Instrument Description: An instrument that measures the hydrogen ion activity in solutions.
The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).
Mettler-Toledo Automatic Titrator
Mettler-Toledo Automatic Titrator
PI Supplied Instrument Name: Mettler-Toledo Automatic Titrator PI Supplied Instrument Description:Manufacturer: Mettler-Toledo
Model: T5 Automatic Titrator
Purpose: Determination of total alkalinity.
Calibration: Daily calibration and validation using Certified Reference Materials (CRM) from the A. G. Dickson Laboratory (Scripps Institution of Oceanography). Analytical accuracy was better than 5 µmol kg⁻¹. 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/