http://lod.bco-dmo.org/id/dataset/808834
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
2020-04-09
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Underway/continuous measurements of O2, O2/Ar and optically-based POC in the North Pacific from 2017-09-05 to 2017-09-27
2020-04-09
publication
2020-04-09
revision
BCO-DMO Linked Data URI
2020-04-09
creation
http://lod.bco-dmo.org/id/dataset/808834
Angelicque E. White
Oregon State University
principalInvestigator
Paul Quay
University of Washington
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: White, A. E., Quay, P. (2020) Underway/continuous measurements of O2, O2/Ar and optically-based POC in the North Pacific from 2017-09-05 to 2017-09-27. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2020-04-09 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/808834 [access date]
Underway/continuous measurements of O2, O2/Ar and optically-based POC in the North Pacific Dataset Description: <p>The cruise (KM1713) transited from Seward, AK to Honolulu, HI from 3-26 September 2017 onboard the R/V Kilo Moana. Six extended stations (Stn), three in subpolar waters (Stn 1 at 55°N, Stn 2 at 50°N, and Stn 3 at 46°N), one in the transition zone between subpolar and subtropical waters (Stn 4 at 42°N), and two in the subtropical gyre (Stn 5 at 34°N, and Stn 6 at 24°N) were occupied for 2-3 day periods during which continuous measurements of conductivity, temperature, O2, O2/Ar and beam attenuation were measured continuously on surface seawater supplied via the ships’ intake line and using CTD profiles of conductivity, temperature, pressure, oxygen, and the particulate beam attenuation coefficient conducted at ~2-hr intervals. An autonomous profiling float was deployed for ~ 2 days at four stations, retrieving CTD and oxygen profiles at approximately 3-hour intervals. Another float with same mission design was deployed near station ALOHA (22.45° N, 158° W) during July 2017 to provide mixed-layer averaged O2 near station 6. When available, the ship followed the trajectory of the profiling float, yielding a near-Lagrangian sampling strategy with the aim to minimize horizontal mixing effects.</p> Methods and Sampling: <p><strong>Underway/continuous measurements of O2, O2/Ar and optically-based POC</strong></p>
<p>Continuous measurements of surface O2, O2/Ar, POC, and beam attenuation coefficients used seawater supplied from an uncontaminated seawater intake line located at ~7m depth.&nbsp; All continuous measurements were binned into hourly averages at each station. Continuous measurements of dissolved O2 concentration using an Optode (Aanderaa) and the dissolved O2/Ar&nbsp; gas ratios using an equilibrator inlet mass spectrometer (EIMS) system [Cassar et al., 2009] were obtained at each station. Dissolved oxygen data (Optode) were corrected for pressure and salinity following Uchida et al. [2008]. O2/Ar measured by the EIMS were calibrated to O2/Ar measurements by mass spectrometer on discrete water samples collected in the mixed layer during the cruise (n=58). Saturated O2 concentrations and O2/Ar values were calculated using the solubility equations of García and Gordon [1992] for O2 and Hamme and Emerson [2004] for Ar. Diurnal changes in O2/Ar data measured by the EIMS instrument were corrected for fluctuations in total gas pressure based on concurrent changes in N2/Ar, yielding O2/Ar*, (i.e., % deviation in O2/Ar* = % deviation O2/Ar – a*% deviation N2/Ar, where ‘a’ represents a calibration factor between N2/Ar and O2/Ar deviations determined at each station). Diurnal changes in O2 were determined by multiplying the relative deviation from the mean O2 measured by the Optode by the mean surface Winkler O2 concentration measured at each station (Eq. 1), where i refers to each datapoint in time, and overbars denotes the mean values while on each station. The diurnal changes in O2/Ar and O2/Ar* were calibrated to Winkler concentrations using the same procedure.</p>
<div>Continuous measurements of the beam attenuation coefficient (660 nm) were obtained with a C-Star instrument (Sea-Bird Scientific).&nbsp; A debubbler and a valve control device were used to divert water to a 0.2 μm membrane filter for the first 10 minutes of every hour to provide background estimates of beam attenuation due to water and dissolved substances [Slade et al., 2010]. These blank values were linearly interpolated throughout the cruise and subtracted from the raw measurements to provide particulate beam attenuation coefficient (cp, m-1).&nbsp;</div>
<p>Discrete water samples (collected on combusted GF/F filters with filter blank corrections following the Hawaiian&nbsp;Ocean Time Series (HOT) protocols, http://hahana.soest.hawaii.edu/hot/methods/pcpn.html) were collected from the ship’s uncontaminated seawater system to determine particulate organic carbon (POC) concentrations every ~2.5 hours (n=107 in total) using a semi-automated filtration device [based on the design of Holser et al., 2011]. Underway POC were scaled to mean near-surface (&lt;10 m) samples collected at each station (n=12; r2=0.92) and these corrected values were then used to convert cp measurements to POC using Eq. 2, where&nbsp; is the mean in situ POC measured at each station.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1849012 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1849012
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1536121 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1536121
onGoing
Angelicque E. White
Oregon State University
808-956-6220
1950 East West Rd.
Honolulu
HI
USA
aewhite@hawaii.edu
pointOfContact
Paul Quay
University of Washington
206-685-8061
University of Washington School of Oceanography MS 355351
Seattle
WA
98195-7940
USA
pdquay@uw.edu
pointOfContact
asNeeded
Unknown
year
decimal_day_of_year
ISO_DateTime_UTC
lon
lat
sta
beam_attenuation_coeff_POC
O2_Ar
O2
MLD
O2_Ar_norm_N2_Ar
Optode (Aanderaa Data Instruments, Bergen, Norway)
inlet mass spectrometer system (EIMS)
C-Star, Sea-Bird Scientific
theme
None, User defined
year
year day (Day of Year, or day of year and decimal time)
ISO_DateTime_UTC
longitude
latitude
station
beam attenuation
dissolved Oxygen
mixed layer depth
featureType
BCO-DMO Standard Parameters
Aanderaa Oxygen Optodes
Equilibrator Inlet Mass Spectrometer
WET Labs {Sea-Bird WETLabs} C-Star transmissometer
instrument
BCO-DMO Standard Instruments
KM1713
service
Deployment Activity
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: Measuring Ocean Productivity from the Diurnal Change in Oxygen and Carbon
https://osprey.bco-dmo.org/project/792396
Collaborative Research: Measuring Ocean Productivity from the Diurnal Change in Oxygen and Carbon
<p>NSF Award Abstract:</p>
<p>The rate of primary production in the ocean is fundamental to the ocean's food web and the movement of carbon from surface waters to the deep ocean, known as the biological pump. Yet spatial and temporal variations in primary productivity are poorly known because the effort required for the current method of measuring primary productivity is significant, limiting its application, and the method has biases that are difficult to quantify. Using a novel combination of approaches, the investigators will estimate daily primary productivity in the ocean at three ecologically distinct sites. The research will significantly improve understanding of primary productivity variations and their impact on the ocean's biological pump, which will benefit the broader ocean community involved in carbon cycle modeling and benefit society via the impact of ocean primary productivity on atmospheric carbon dioxide uptake and future climate change. The research results will be incorporated into both undergraduate and graduate course curricula and outreach talks at the two institutions. There will be active undergraduate student participation in the project at both Oregon State University and the University of Washington.</p>
<p>Within the last decade, an in-situ primary productivity method based on measuring the isotopic composition of dissolved oxygen (O2) gas has gained traction within the oceanographic community because it yields a primary production estimate from a simple water sample collection. This method has yielded basin-wide snapshots of primary productivity based on underway sampling of the surface ocean by ships of opportunity. However, accurate estimates of oxygen/particulate organic carbon (O2/POC) produced during primary productivity are needed to convert oxygen-based primary production rates to carbon production. In this project, daily in-situ rates of primary production in the surface ocean at three ocean sites will be estimated from continuous measurements of diurnal cycles in the oxygen/argon dissolved gas ratio and POC and compared to simultaneous in vitro primary productivity estimates. Variations in the O2/POC produced during primary production will be determined. Autonomous float-based estimates of primary production based on measurements of diurnal cycles in O2 and POC will be validated using ship based measurements. Estimates of primary production based on autonomous measurements resulting from this research have the potential to revolutionize our knowledge on the spatial and temporal variations in primary productivity in the ocean.</p>
ProdChangeO2Carb
largerWorkCitation
project
eng; USA
oceans
-160
-145
24
55
2017-09-05
2017-09-27
North Pacific Ocean, from ~ 22 N to ~ 55 N, surface and mixed-layer
0
BCO-DMO catalogue of parameters from Underway/continuous measurements of O2, O2/Ar and optically-based POC in the North Pacific from 2017-09-05 to 2017-09-27
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/808888.rdf
Name: year
Units: unitless
Description: <p>year of observation</p>
http://lod.bco-dmo.org/id/dataset-parameter/808889.rdf
Name: decimal_day_of_year
Units: unitless
Description: <p>decimal day of the year in UTC</p>
http://lod.bco-dmo.org/id/dataset-parameter/808890.rdf
Name: ISO_DateTime_UTC
Units: yyyy-MM-dd'T'HH:mm:ss'Z'
Description: <p>Date and time formatted according to ISO8601 in UTC</p>
http://lod.bco-dmo.org/id/dataset-parameter/808891.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude with negative values indicating West</p>
http://lod.bco-dmo.org/id/dataset-parameter/808892.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude with positive values indicating North</p>
http://lod.bco-dmo.org/id/dataset-parameter/808893.rdf
Name: sta
Units: unitless
Description: <p>station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/808894.rdf
Name: beam_attenuation_coeff_POC
Units: miligrams Carbon per meter cubed (mg C/m3)
Description: <p>continuous surface particulate beam attenuation coefficient calibrated to particulate organic carbon concentrations (POC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/808895.rdf
Name: O2_Ar
Units: millimole per meter cubed (mmol/m3)
Description: <p>continuous surface Winkler-calibrated O2/Ar (mmol/m3)</p>
http://lod.bco-dmo.org/id/dataset-parameter/808896.rdf
Name: O2
Units: millimole per meter cubed (mmol/m3)
Description: <p>continutous surface Winkler-calibrated O2 (from Optode)</p>
http://lod.bco-dmo.org/id/dataset-parameter/808897.rdf
Name: MLD
Units: meters (m)
Description: <p>Mixed Layer Depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/808898.rdf
Name: O2_Ar_norm_N2_Ar
Units: millimole per meter cubed (mmol/m3)
Description: <p>continuous surface Winkler-calibrated O2/Ar normalized by N2/Ar (O2/Ar*; see manuscript)</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/808834/data/download
download
onLine
dataset
<p><strong>Underway/continuous measurements of O2, O2/Ar and optically-based POC</strong></p>
<p>Continuous measurements of surface O2, O2/Ar, POC, and beam attenuation coefficients used seawater supplied from an uncontaminated seawater intake line located at ~7m depth.&nbsp; All continuous measurements were binned into hourly averages at each station. Continuous measurements of dissolved O2 concentration using an Optode (Aanderaa) and the dissolved O2/Ar&nbsp; gas ratios using an equilibrator inlet mass spectrometer (EIMS) system [Cassar et al., 2009] were obtained at each station. Dissolved oxygen data (Optode) were corrected for pressure and salinity following Uchida et al. [2008]. O2/Ar measured by the EIMS were calibrated to O2/Ar measurements by mass spectrometer on discrete water samples collected in the mixed layer during the cruise (n=58). Saturated O2 concentrations and O2/Ar values were calculated using the solubility equations of García and Gordon [1992] for O2 and Hamme and Emerson [2004] for Ar. Diurnal changes in O2/Ar data measured by the EIMS instrument were corrected for fluctuations in total gas pressure based on concurrent changes in N2/Ar, yielding O2/Ar*, (i.e., % deviation in O2/Ar* = % deviation O2/Ar – a*% deviation N2/Ar, where ‘a’ represents a calibration factor between N2/Ar and O2/Ar deviations determined at each station). Diurnal changes in O2 were determined by multiplying the relative deviation from the mean O2 measured by the Optode by the mean surface Winkler O2 concentration measured at each station (Eq. 1), where i refers to each datapoint in time, and overbars denotes the mean values while on each station. The diurnal changes in O2/Ar and O2/Ar* were calibrated to Winkler concentrations using the same procedure.</p>
<div>Continuous measurements of the beam attenuation coefficient (660 nm) were obtained with a C-Star instrument (Sea-Bird Scientific).&nbsp; A debubbler and a valve control device were used to divert water to a 0.2 μm membrane filter for the first 10 minutes of every hour to provide background estimates of beam attenuation due to water and dissolved substances [Slade et al., 2010]. These blank values were linearly interpolated throughout the cruise and subtracted from the raw measurements to provide particulate beam attenuation coefficient (cp, m-1).&nbsp;</div>
<p>Discrete water samples (collected on combusted GF/F filters with filter blank corrections following the Hawaiian&nbsp;Ocean Time Series (HOT) protocols, http://hahana.soest.hawaii.edu/hot/methods/pcpn.html) were collected from the ship’s uncontaminated seawater system to determine particulate organic carbon (POC) concentrations every ~2.5 hours (n=107 in total) using a semi-automated filtration device [based on the design of Holser et al., 2011]. Underway POC were scaled to mean near-surface (&lt;10 m) samples collected at each station (n=12; r2=0.92) and these corrected values were then used to convert cp measurements to POC using Eq. 2, where&nbsp; is the mean in situ POC measured at each station.</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO Processing Notes:<br />
-&nbsp;added conventional header with dataset name, PI name, version date<br />
- modified parameter names to conform with BCO-DMO naming conventions<br />
-&nbsp;added ISO Date format generated from date and time values<br />
- combined POC and O2 continuous&nbsp;data</p>
Specified by the Principal Investigator(s)
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
Optode (Aanderaa Data Instruments, Bergen, Norway)
Optode (Aanderaa Data Instruments, Bergen, Norway)
PI Supplied Instrument Name: Optode (Aanderaa Data Instruments, Bergen, Norway) PI Supplied Instrument Description:Dissolved oxygen: Optode (Aanderaa Data Instruments, Bergen, Norway) 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/
inlet mass spectrometer system (EIMS)
inlet mass spectrometer system (EIMS)
PI Supplied Instrument Name: inlet mass spectrometer system (EIMS) PI Supplied Instrument Description:O2/Ar ratio: inlet mass spectrometer system (EIMS) Instrument Name: Equilibrator Inlet Mass Spectrometer Instrument Short Name:EIMS Instrument Description: Cassar N, Barnett BA, Bender ML, Kaiser J, Hamme RC, Tilbrook B., Continuous high-frequency dissolved O2/Ar measurements by equilibrator inlet mass spectrometry. Anal Chem. 2009 Mar 1;81(5):1855-64. doi: 10.1021/ac802300u.
Source: Department of Geosciences, Princeton University, Princeton, New Jersey 08544, USA. ncassar@princeton.edu
Abstract
The oxygen (O(2)) concentration in the surface ocean is influenced by biological and physical processes. With concurrent measurements of argon (Ar), which has similar solubility properties as oxygen, we can remove the physical contribution to O(2) supersaturation and determine the biological oxygen supersaturation. Biological O(2) supersaturation in the surface ocean reflects the net metabolic balance between photosynthesis and respiration, i.e., the net community productivity (NCP). We present a new method for continuous shipboard measurements of O(2)/Ar by equilibrator inlet mass spectrometry (EIMS). From these measurements and an appropriate gas exchange parametrization, NCP can be estimated at high spatial and temporal resolution. In the EIMS configuration, seawater from the ship's continuous intake flows through a cartridge enclosing a gas-permeable microporous membrane contactor. Gases in the headspace of the cartridge equilibrate with dissolved gases in the flowing seawater. A fused-silica capillary continuously samples headspace gases, and the O(2)/Ar ratio is measured by mass spectrometry. The ion current measurements on the mass spectrometer reflect the partial pressures of dissolved gases in the water flowing through the equilibrator. Calibration of the O(2)/Ar ion current ratio (32/40) is performed automatically every 2 h by sampling ambient air through a second capillary. A conceptual model demonstrates that the ratio of gases reaching the mass spectrometer is dependent on several parameters, such as the differences in molecular diffusivities and solubilities of the gases. Laboratory experiments and field observations performed by EIMS are discussed. We also present preliminary evidence that other gas measurements, such as N(2)/Ar and pCO(2) measurements, may potentially be performed with EIMS. Finally, we compare the characteristics of the EIMS with the previously described membrane inlet mass spectrometry (MIMS) approach.
PMID: 19193192 [PubMed - indexed for MEDLINE]
C-Star, Sea-Bird Scientific
C-Star, Sea-Bird Scientific
PI Supplied Instrument Name: C-Star, Sea-Bird Scientific PI Supplied Instrument Description:Beam attenuation at 660 nm: (C-Star, Sea-Bird Scientific). Instrument Name: WET Labs {Sea-Bird WETLabs} C-Star transmissometer Instrument Short Name:WL CSTAR Trans Instrument Description: The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.
More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717 Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0160/
Cruise: KM1713
KM1713
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel
KM1713
Paul Quay
University of Washington
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel