http://lod.bco-dmo.org/id/dataset/983583
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
2025-08-27
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Oxygen and Gas Tension data collected from ODZ Floats Deployed from the RV Sally Ride Cruises SR2011 and SR2114 in the Eastern Tropical North Pacific from 2020 to 2023 (N-loss in the ETNP ODZ project)
2025-08-26
publication
2025-08-26
revision
BCO-DMO Linked Data URI
2025-08-26
creation
http://lod.bco-dmo.org/id/dataset/983583
Eric D'Asaro
University of Washington Applied Physics Laboratory
principalInvestigator
Craig L. McNeil
University of Washington Applied Physics Laboratory
principalInvestigator
Mark A. Altabet
University of Massachusetts Dartmouth
principalInvestigator
Clifford Cunningham
Duke University Department of Biology
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: D'Asaro, E., McNeil, C. L., Altabet, M. A., Cunningham, C. (2025) Oxygen and Gas Tension data collected from ODZ Floats Deployed from the RV Sally Ride Cruises SR2011 and SR2114 in the Eastern Tropical North Pacific from 2020 to 2023 (N-loss in the ETNP ODZ project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-08-26 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/983583 [access date]
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1154741 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1154741
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1153295 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1153295
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
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1851210 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1851210
Funding provided by Office of Naval Research (ONR) Award Number: N00014-20-1-2849
onGoing
Eric D'Asaro
University of Washington Applied Physics Laboratory
206-685-2982
Applied Physics Laboratory 1013 NE 40th Str
Seattle
WA
98105
USA
dasaro@apl.uw.edu
pointOfContact
Craig L. McNeil
University of Washington Applied Physics Laboratory
206-543-2157
Applied Physics Laboratory 1013 NE 40th Street
Seattle
WA
98105-6698
USA
cmcneil@uw.edu
pointOfContact
Mark A. Altabet
University of Massachusetts Dartmouth
508-999-8622
706 S. Rodney French Blvd
New Bedford
MA
02067
USA
maltabet@umassd.edu
pointOfContact
Clifford Cunningham
Duke University Department of Biology
919-660-7356
Box 90338
Durham
NC
27708
cliff@duke.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
MatlabSerialDateNumber
timestring
DateTime
latitude
longitude
OptodeTemperature_C
CTDTemperature_C
CTDSalinity_PSU
CTDPressure_dbar
OptodeOxygenFromSensor_micromolkg
OptodeOxygenCalibrated_micromolkg
GTDtemperature_C
GTDGasTension_mbar
ODZFloatSN
CalibrationFlag
SourceFileName
Aanderaa (Xylem) Oxygen Optodes
Seabird 41C CTD Sensors
theme
None, User defined
Date and time
latitude
longitude
temperature of sample or a generic measurement (not in-situ water temp)
salinity
water pressure
dissolved Oxygen
No BCO-DMO term
mooring identification
flag
file_name
featureType
BCO-DMO Standard Parameters
Aanderaa Oxygen Optodes
CTD Sea-Bird 41
instrument
BCO-DMO Standard Instruments
SR2011
SR2114
service
Deployment Activity
Eastern tropical North Pacific oxygen deficient zone
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 >500 profiles/drifts for nitrogen and >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 North Pacific oxygen deficient zone; Eastern Tropical Pacific from Costa Rica to San Diego, CA, USA
-107.803648
-90.631261
8.990436
17.31845
2020-12-21
2022-05-12
0
BCO-DMO catalogue of parameters from Oxygen and Gas Tension data collected from ODZ Floats Deployed from the RV Sally Ride Cruises SR2011 and SR2114 in the Eastern Tropical North Pacific from 2020 to 2023 (N-loss in the ETNP ODZ 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
http://lod.bco-dmo.org/id/dataset-parameter/984134.rdf
Name: MatlabSerialDateNumber
Units: unitless
Description: <p>Datetime output of measurement capture exported from the Argo float as a MATLAB serial date number (days since 0000-01-01, decimals represent fraction of day).</p>
http://lod.bco-dmo.org/id/dataset-parameter/984135.rdf
Name: timestring
Units: unitless
Description: <p>Datetime output of measurement capture exported from the Argo float.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984136.rdf
Name: DateTime
Units: unitless
Description: <p>FAIR compliant datetime output of measurement capture from the Argo float converted to ISO format.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984137.rdf
Name: latitude
Units: decimal degrees
Description: <p>Latitude of the ODZ float at the point of measurement capture in decimal degrees; a positive value indicates a northern coordinate.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984138.rdf
Name: longitude
Units: decimal degrees
Description: <p>Longitude of the ODZ float at the point of measurement capture in decimal degrees; a negative value indicates a western coordinate.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984139.rdf
Name: OptodeTemperature_C
Units: degrees C
Description: <p>Temperature output by the optode in degrees C.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984140.rdf
Name: CTDTemperature_C
Units: degrees C
Description: <p>Temperature measured by the SBE41CT in degrees C.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984141.rdf
Name: CTDSalinity_PSU
Units: PSU
Description: <p>Salinity measured by the SBE41CT in PSU.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984142.rdf
Name: CTDPressure_dbar
Units: dbar
Description: <p>Pressure measured by the SBE41CT in dbar.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984143.rdf
Name: OptodeOxygenFromSensor_micromolkg
Units: micromoles per kg
Description: <p>Oxygen output by the optode in micromoles per kg.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984144.rdf
Name: OptodeOxygenCalibrated_micromolkg
Units: micromoles per kg
Description: <p>Recalibrated oxygen from the data in micromoles per kg.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984145.rdf
Name: GTDtemperature_C
Units: degrees C
Description: <p>Temperature output by the optode in degrees C.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984146.rdf
Name: GTDGasTension_mbar
Units: millibar
Description: <p>Gas tension measured by the GTD in millibar. This has no quality control. Some data is bad.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984147.rdf
Name: ODZFloatSN
Units: unitless
Description: <p>Serial number of the ODZ float associated with the represented measurement.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984148.rdf
Name: CalibrationFlag
Units: unitless
Description: <p>Flag indicating if the data in a given row is from a pre or post calibrated file or (precalibrated_data or postcalibrated_data).</p>
http://lod.bco-dmo.org/id/dataset-parameter/984149.rdf
Name: SourceFileName
Units: unitless
Description: <p>Original file name from which the BCO-DMO primary data file (983583_v1_odz_float_oxygen_and_gtd_data.csv) was compiled.</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/983583/data/download
download
onLine
dataset
* The primary data file of this dataset (983583_v1_odz_float_oxygen_and_gtd_data.csv) is comprised of merged pre and post calibrated ODZ float data files. New columns have been added to this data file that indicate the name of the original source file (column "SourceFileName"), the serial number of the associated ODZ float (column "ODZFloatSN"), and a column indicating if a row of data was derived from a pre or post calibrated data file ( column "CalibrationFlag").
* An ISO formatted date time column has been created called "DateTime. This column was created from the "timestring" column, where the format has been converted from %d-%b-%Y %H:%M:%S to %Y-%m-%d %H:%M:%S.
* Latitude and longitude values have been rounded to 6 degrees of precision.
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
Aanderaa (Xylem) Oxygen Optodes
Aanderaa (Xylem) Oxygen Optodes
PI Supplied Instrument Name: Aanderaa (Xylem) Oxygen Optodes PI Supplied Instrument Description:All Argo floats used for data collection were equipped with Aaneraa (Xylem) oxygen optodes. Instrument Name: Aanderaa Oxygen Optodes Instrument Short Name:AOO Instrument Description: Aanderaa Oxygen Optodes are instrument for monitoring oxygen in the environment. For instrument information see the Aanderaa Oxygen Optodes Product Brochure. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/351/
Seabird 41C CTD Sensors
Seabird 41C CTD Sensors
PI Supplied Instrument Name: Seabird 41C CTD Sensors PI Supplied Instrument Description:All Argo floats used for data collection were equipped with Seabird 41C temperature, salinity, and pressure sensors. Instrument Name: CTD Sea-Bird 41 Instrument Short Name:CTD SBE 41 Instrument Description: The Sea-Bird SBE 41 CTD module was originally developed in 1997 for integration with sub-surface oceanographic floats. It uses MicroCAT Temperature, Conductivity, and Pressure sensors. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Cruise: SR2011
SR2011
R/V Sally Ride
Community Standard Description
International Council for the Exploration of the Sea
R/V Sally Ride
vessel
SR2011
Mark A. Altabet
University of Massachusetts Dartmouth SMAST
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