http://lod.bco-dmo.org/id/dataset/969971
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
2025-07-28
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Nutrient concentrations and biogeochemical rate data collected in the eastern tropical North Pacific Ocean in 2017 on R/V Oceanus cruise 1704A
2025-07-29
publication
2025-07-29
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-07-29
publication
https://doi.org/10.26008/1912/bco-dmo.969971.1
John Michael Beman
University of California-Merced
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: Beman, J. M. (2025) Nutrient concentrations and biogeochemical rate data collected in the eastern tropical North Pacific Ocean in 2017 on R/V Oceanus cruise 1704A. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-07-29 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.969971.1 [access date]
ETNP17 Nutrients and Rates Dataset Description: Methods and Sampling: <p>Samples were collected in April 2017 aboard the <em>R/V Oceanus</em> using Niskin bottles. Nutrient samples were analyzed for NH<sub>4</sub><sup>+</sup> and NO<sub>2</sub><sup>- </sup>aboard the ship, with additional shore-based analyses of combined NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> and PO<sub>4</sub><sup>3-</sup> at the University of California Santa Barbara Marine Science Institute Analytical Lab (see Beman et al. 2020). Water column profiles of oxygen consumption rates (OCR) were measured using 5 replicates at each depth, including one each with tracer level (5-10% <em>in situ </em>concentration measured at sea) addition of <sup>15</sup>NH<sub>4</sub><sup>+ </sup>or <sup>15</sup>NO<sub>2</sub><sup>- </sup>to measure ammonia/nitrite oxidation. OCR was measured based on starting and ending DO values, and samples for nitrite and ammonia oxidation were collected from<sup> </sup>labeled bottles at the end of the experiments. Nitrite and ammonia oxidation rates followed Beman et al. (2012) and Beman et al. (2013). See Beman et al. (preprint) for additional detail.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1555375 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1555375
completed
John Michael Beman
University of California-Merced
650-823-7925
5200 North Lake Road
Merced
CA
95343
USA
jmbeman@gmail.com
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Latitude
Longitude
Date
Time_Local
Station
Depth
OCR
Nitrate
Nitrite
Ammonium
Ammonia_oxidation
Nitrite_oxidation
IsoPrime 100 isotope ratio mass spectrometer
Lachat QuikChem 8500 Series 2 Flow Injection Analyzer
Loligo Systems Fibox
Turner Trilogy Fluorometer
theme
None, User defined
latitude
longitude
date
time of day
station
depth
O2 consumption
Nitrate
Nitrite
Ammonium
oxidation
featureType
BCO-DMO Standard Parameters
Isotope-ratio Mass Spectrometer
Lachat QuikChem 8500 flow injection analysis system
Oxygen Sensor
Turner Designs Trilogy fluorometer
instrument
BCO-DMO Standard Instruments
OC1704A
service
Deployment Activity
San Diego, California to Mazatlan, Mexico
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.
CAREER: Oxygen sensitivity of aerobic respiration and nitrification in oxygen minimum zones and biogeochemical feedbacks to deoxygenation
https://bemanlab.org/about/research/research-etnp-and-goc/
CAREER: Oxygen sensitivity of aerobic respiration and nitrification in oxygen minimum zones and biogeochemical feedbacks to deoxygenation
<p><em>NSF Award Abstract:</em><br />
Aerobic microorganisms in the ocean help regulate biogeochemical nutrient cycles through the linked production and consumption of dissolved oxygen (DO) and organic matter. Concentrations of DO have been shown to be steadily decreasing in deeper ocean waters and the resulting areas of critically low DO content, known as oxygen minimum zones (OMZs), are expanding. While this phenomenon is recognized as having potentially serious impacts on biogeochemical cycles where OMZs are growing, surprisingly little research has been done to identify the mechanisms and quantify the specific processes that will affect these changes. This project will study the connection between changing DO concentrations and nutrient cycling in the interior of the ocean. The oxidation of nitrogen compounds (ammonia and nitrite in particular) is strongly influenced by DO concentrations. Because of the complex and connected nature of marine biogeochemical reactions that involve DO, each one potentially altered by concentration changes, this research is critical for a complete understanding of how ocean chemistry will change in the near future. The project will incorporate education into the research by developing materials to teach high school students about the nitrogen cycle, by developing a marine chemistry based course for undergraduates that will give them both field and computational experience, and by building on past efforts to include traditionally underrepresented groups in science. One of the graduate students funded by this project will translate lectures into Spanish and make these available on the internet for increased accessibility for minority students.</p>
<p>The world's largest oxygen minimum zone (OMZ), located in the Eastern Tropical North Pacific (ETNP), is an ideal study site for research into the effects of varying dissolved oxygen (DO) concentrations on nutrient cycling in the interior ocean. Throughout this OMZ, the extent of anoxia exhibits a range that allows for study of the effect of changing DO content on the rates and mechanisms that control consumption of DO and organic matter by aerobic microorganisms in a 'real world' setting. In particular, ammonia and nitrite oxidation, reactions that play a critical role in the nitrogen cycle, are likely to be significantly affected by varying DO concentration. This project will evaluate aerobic respiration, ammonia, and nitrite oxidation rates at various stations in the ETNP, examine carefully controlled incubations, and develop primers to target active microorganisms in the OMZ; all to quantify the connections between DO and these biogeochemical nutrient cycles. The research will also examine the hypothesis that more organic carbon is respired in waters with low DO and a shallow OMZ than previously thought and evaluate the possibility that nitrogen cycling in low DO regions could push OMZs to anoxia due to nitrite oxidation coupled with nitrate reduction, which could potentially accelerate DO consumption. With the expansion of OMZ's in a changing ocean, it is crucial to more fully understand the connections between these various, complex, components.</p>
RANDOM
largerWorkCitation
project
eng; USA
oceans
San Diego, California to Mazatlan, Mexico
-117.5
-106.5
16
27.4
2017-04-07
2017-04-27
Eastern Tropical North Pacific Ocean
0
BCO-DMO catalogue of parameters from Nutrient concentrations and biogeochemical rate data collected in the eastern tropical North Pacific Ocean in 2017 on R/V Oceanus cruise 1704A
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/970012.rdf
Name: Latitude
Units: decimal degrees North
Description: <p>Latitude of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/970013.rdf
Name: Longitude
Units: decimal degrees East
Description: <p>Longitude of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/970014.rdf
Name: Date
Units: unitless
Description: <p>Date of sample collection (local time zone)</p>
http://lod.bco-dmo.org/id/dataset-parameter/970015.rdf
Name: Time_Local
Units: unitless
Description: <p>Time of sample collection (local time zone). Stations 1-5 are Mountain time and Station 6 is Pacific time.</p>
http://lod.bco-dmo.org/id/dataset-parameter/970016.rdf
Name: Station
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/970017.rdf
Name: Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/970018.rdf
Name: OCR
Units: micromoles per liter per day
Description: <p>Oxygen consumption rate</p>
http://lod.bco-dmo.org/id/dataset-parameter/970019.rdf
Name: Nitrate
Units: micromolar
Description: <p>Dissolved nitrate concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/970020.rdf
Name: Nitrite
Units: micromolar
Description: <p>Dissolved nitrite concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/970021.rdf
Name: Ammonium
Units: micromolar
Description: <p>Dissolved ammonium concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/970022.rdf
Name: Ammonia_oxidation
Units: nanomoles per liter per day
Description: <p>Ammonia oxidation rate</p>
http://lod.bco-dmo.org/id/dataset-parameter/970023.rdf
Name: Nitrite_oxidation
Units: nanomoles per liter per day
Description: <p>Nitrite oxidation rate</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
5188
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/ce36c3ed-8bf7-47fb-a2d4-3b607e8329bc/content
download
https://doi.org/10.26008/1912/bco-dmo.969971.1
download
onLine
dataset
<p>Samples were collected in April 2017 aboard the <em>R/V Oceanus</em> using Niskin bottles. Nutrient samples were analyzed for NH<sub>4</sub><sup>+</sup> and NO<sub>2</sub><sup>- </sup>aboard the ship, with additional shore-based analyses of combined NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> and PO<sub>4</sub><sup>3-</sup> at the University of California Santa Barbara Marine Science Institute Analytical Lab (see Beman et al. 2020). Water column profiles of oxygen consumption rates (OCR) were measured using 5 replicates at each depth, including one each with tracer level (5-10% <em>in situ </em>concentration measured at sea) addition of <sup>15</sup>NH<sub>4</sub><sup>+ </sup>or <sup>15</sup>NO<sub>2</sub><sup>- </sup>to measure ammonia/nitrite oxidation. OCR was measured based on starting and ending DO values, and samples for nitrite and ammonia oxidation were collected from<sup> </sup>labeled bottles at the end of the experiments. Nitrite and ammonia oxidation rates followed Beman et al. (2012) and Beman et al. (2013). See Beman et al. (preprint) for additional detail.</p>
Specified by the Principal Investigator(s)
<p>Data were processed and analyzed in Microsoft Excel and R.</p>
Specified by the Principal Investigator(s)
- Imported original file "BCODMO_BEMAN_ETNP17.xlsx" into the BCO-DMO system.
- Flagged "nd" as a missing data value (missing data are empty/blank in the final CSV file).
- Converted Date column to YYYY-MM-DD format.
- Converted Time column to hh:mm format and renamed to "Time_Local".
- Renamed fields to comply with BCO-DMO naming conventions.
- Saved final file as "969971_v1_etnp17_nutrients_and_rates.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
IsoPrime 100 isotope ratio mass spectrometer
IsoPrime 100 isotope ratio mass spectrometer
PI Supplied Instrument Name: IsoPrime 100 isotope ratio mass spectrometer PI Supplied Instrument Description:IsoPrime 100 isotope ratio mass spectrometer normalized to international reference materials (USGS 32, USGS 34, USGS 35). 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/
Lachat QuikChem 8500 Series 2 Flow Injection Analyzer
Lachat QuikChem 8500 Series 2 Flow Injection Analyzer
PI Supplied Instrument Name: Lachat QuikChem 8500 Series 2 Flow Injection Analyzer 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.
Loligo Systems Fibox
Loligo Systems Fibox
PI Supplied Instrument Name: Loligo Systems Fibox PI Supplied Instrument Description:The Loligo Systems Fibox is a fiber optic oxygen meter. Instrument Name: Oxygen Sensor Instrument Short Name:Dissolved Oxygen Sensor Instrument Description: An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed
Turner Trilogy Fluorometer
Turner Trilogy Fluorometer
PI Supplied Instrument Name: Turner Trilogy Fluorometer 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.
Cruise: OC1704A
OC1704A
R/V Oceanus
Community Standard Description
International Council for the Exploration of the Sea
R/V Oceanus
vessel
OC1704A
John Michael Beman
R/V Oceanus
Community Standard Description
International Council for the Exploration of the Sea
R/V Oceanus
vessel