http://lod.bco-dmo.org/id/dataset/944886
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
2024-12-03
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Nitrous oxide (N2O) and transient tracer (chlorofluorocarbons, sulfur hexafluoride) concentrations from samples collected on three GO-SHIP cruises in the tropical Pacific Ocean during 2015-2016
2024-12-10
publication
2024-12-10
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2024-12-10
publication
https://doi.org/10.26008/1912/bco-dmo.944886.1
Bonnie X. Chang
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: Chang, B. X. (2024) Nitrous oxide (N2O) and transient tracer (chlorofluorocarbons, sulfur hexafluoride) concentrations from samples collected on three GO-SHIP cruises in the tropical Pacific Ocean during 2015-2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-12-10 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.944886.1 [access date]
Nitrous oxide and transient tracer concentrations in the tropical Pacific Ocean Dataset Description: Methods and Sampling: <p>Water samples were collected in bottles designed with a modified end-cap to minimize the contact of the water sample with the end-cap O-rings after closing. Stainless steel springs covered with a nylon powder coat were substituted for the internal elastic tubing provided with standard Niskin bottles. When taken, water samples collected for dissolved CFC/SF6/N2O analyses were the first samples drawn from the bottles. To minimize contact with air, the CFC/SF6/N2O samples were drawn directly through the stopcocks of the bottles into 250-milliliter (ml) precision glass syringes equipped with three-way plastic stopcocks. The syringes were immersed in a holding tank of clean surface seawater held at ~10 degrees Celsius (°C) until 20 minutes before being analyzed. At that time, the syringe was placed in a bath of surface seawater heated to 32°C.</p>
<p>Concentrations of CFC/SF6/N2O in seawater and gas standards were measured by shipboard electron capture detector gas chromatography (ECD-GC) using techniques modified from those described by Bullister and Wisegarver (2008), as outlined below. For seawater analyses, water was transferred from a glass syringe to a glass-sparging chamber (volume 200 ml). The dissolved gases in the seawater sample were extracted by passing a supply of CFC/SF6/N2O-free N2 through the sparging chamber for a period of 6 minutes at 150 milliliters per minute (ml min-1). Water vapor was removed from the purge gas during passage through a Nafion drier. Carbon dioxide was removed with an 18-centimeter (cm) long, 3/8-inch diameter glass tube packed with Ascarite and a small amount of magnesium perchlorate desiccant. The sample gases were concentrated on a cold-trap consisting of a 1/16-inch OD stainless steel tube with a 2.5 cm section packed tightly with Porapak Q, a 15 cm section packed with Carboxen 1000 and a 2.5 cm section packed with MolSieve 5 angstrom (Å). A Neslab Cryocool CC-100 was used to cool the trap to -65°C. After 6 minutes of purging, the trap was isolated, and heated electrically to 170°C. The sample gases held in the trap were then injected onto a precolumn (~61 cm of 1/8-inch OD stainless steel tubing packed with Porasil B, held at 80°C) for the initial separation of CFC-12, CFC-11, SF6 from later eluting peaks.</p>
<p>After the SF6 and CFC-12 had passed from the pre-column and into the second pre-column (26 cm of 1/8-inch OD stainless steel tubing packed with MolSieve 5Å, 160°C) and into the analytical column #1 (174 cm of 1/8-inch OD stainless steel tubing packed with MolSieve 5Å and 60 cm Porasil C held at 80°C), the outflow from the first pre-column was diverted to the second analytical column (180 cm 1/8-inch OD stainless steel tubing packed with Porasil B held at 80°C). The gases remaining after CFC- 11 had passed through the first pre-column, were backflushed from the precolumn and vented. After CFC-12 had passed through the second pre-column, a flow of Argon:Methane (95:5) was used to divert the N2O to a third analytical column (30 cm of MolSieve 5Å, 150°C). Column #3 and the second pre-column were held in a Shimadzu GC8AIE gas chromatograph with an electron capture detector (ECD) held at 330°C. Columns #1, and the first pre-column were in another Shimadzu GC8AIE gas chromatograph with ECD. The column #2 was also in a Shimadzu GC8AIE gas chromatograph with the ECD held at 330°C.</p>
<p>The analytical system was calibrated frequently using a standard gas of known CFC/SF6/N2O composition. Gas sample loops of known volume were thoroughly flushed with standard gas and injected into the system. The temperature and pressure was recorded so that the amount of gas injected could be calculated. The procedures used to transfer the standard gas to the trap, pre-columns, main chromatographic column, and ECD were similar to those used for analyzing water samples. Four sizes of gas sample loops were used. Multiple injections of these loop volumes could be made to allow the system to be calibrated over a relatively wide range of concentrations. System blanks (injections of loops of CFC/SF6/N2O-free gas) were injected and analyzed in a similar manner. The typical analysis time for seawater, standard or blank samples was ~12 minutes. Concentrations of CFC-11, CFC-12, and N2O in seawater samples and gas standards are reported relative to the SIO98 calibration scale (Prinn et al., 2000). Concentrations of SF6 in seawater samples and gas standards are reported relative to the SIO-2005 calibration scale (Bullister and Tanhua, 2010). Dissolved CFC concentrations are given in units of picomoles per kilogram seawater (pmol kg-1), SF6 concentrations in femtomoles per kilogram (fmol kg-1), and N2O concentrations in nanomoles per kilogram (nmol kg-1). CFC/SF6/N2O concentrations in seawater samples were determined by fitting their chromatographic peak areas to multi-point calibration curves, generated by injecting multiple sample loops of gas from a working standard into the analytical instrument. The response of the detector to the range of moles of CFC/SF6/N2O passing through the detector remained relatively constant during the cruise. Full-range calibration curves were run at several times during the cruise and partial curves were run as frequently as possible, usually while sampling. Single injections of a fixed volume of standard gas at one atmosphere were run much more frequently (at intervals of 90 minutes) to monitor short-term changes in detector sensitivity.</p>
<p>The purging efficiency was estimated by re-purging a high-concentration water sample and measuring the residual signal. At a flow rate of 150 ml min-1 for 6 minutes, the purging efficiency for SF6 and both CFC gases was &gt;99%. The efficiency for N2O was typically about 96%.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2048518 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2048518
completed
Bonnie X. Chang
University of Washington
Cooperative Institute for Climate, Ocean, and Ecosystem Studies University of Washington
Seattle
WA
USA
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise
Station
ISO_DateTime_UTC
Longitude_360
Longitude
Latitude
Bot_Depth
Pressure
SAMPNO
SAMPNO_QF
TEMPERATURE
CFC11
CFC11_QF
CFC12
CFC12_QF
SF6
SF6_QF
CTD_SALINITY
CTD_SALINITY_QF
N2O
N2O_QF
Seabird SBE9plus CTD
Niskin bottles
Shimadzu GC8AIE
theme
None, User defined
Cruise identfier
station
ISO_DateTime_UTC
longitude from 0 to 360 degrees
longitude
latitude
depth_bottom
water pressure
sample identification
quality flag
water temperature at measurement depth
CFC-11
CFC-12
SF6
salinity
Nitrous Oxide
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Niskin bottle
Shimadzu GC-8AIE gas chromatograph
instrument
BCO-DMO Standard Instruments
RB1503_leg1
RB1606_leg1
IN2016_V03
service
Deployment Activity
Tahiti, FP to Honolulu, Hawaii
San Diego, CA, USA to Hanga Roa, Chile
Hobart - Wellington (NZ) - Lautoka (Fiji)
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.
Equatorial transport of nitrous oxide from the eastern tropical Pacific Ocean
https://osprey.bco-dmo.org/project/934759
Equatorial transport of nitrous oxide from the eastern tropical Pacific Ocean
<p><em>NSF Award Abstract:</em><br />
Nitrous oxide (N2O) is a powerful greenhouse gas, ~300 times stronger than carbon dioxide and is also implicated in the destruction of the ozone layer. Thus, it is important to understand the magnitude and sources of N2O to the atmosphere in order to predict future climate impacts. The ocean is a significant source of N2O to the atmosphere, but its overall contribution is uncertain. A significant amount of the marine N2O delivered to the atmosphere comes from the eastern tropical Pacific (ETP). This region is host to some of the lowest oxygen concentrations in the entire ocean, which is favorable to a massive production of N2O. Previous estimates of the amount of N2O diffusing out of the ETP to the atmosphere considered only the area directly over the high N2O region of the ETP. However, there are strong subsurface currents that flow away from the ETP, westward along the equator, and N2O carried away in these equatorial currents has been overlooked when determining the contribution of the ETP to marine emissions of N2O. This proposed work will use new, high-quality N2O data collected on 3 Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) cruises through the tropical Pacific to investigate N2O cycling across the entire tropical Pacific Ocean. Low oxygen regions, like the ETP, are predicted to expand in the future, potentially leading to an increase in N2O production, underscoring the importance of understanding N2O cycling in this region. This project will support mentoring up to two undergraduate summer interns.</p>
<p>Recent advances in analytical capabilities within the NOAA/PMEL Trace Gas group, and their application to three Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) repeat hydrography cruises through the tropical Pacific, have facilitated the collection of nitrous oxide measurements of unprecedented quality and coverage of the region, together with complementary hydrographic parameters. We propose to use this new, high-quality GO-SHIP N2O data in concert with the stable isotopic composition of nitrous oxide, tracers of ventilation rates, and current velocities to investigate the transport, production, and efflux of nitrous oxide in the tropical Pacific Ocean. Using both observation data and idealized modeling, the research will (i) estimate the magnitude of the physical transport of N2O to/from the ETP, and losses to the atmosphere, and (ii) differentiate the sources of N2O in equatorial currents between advection from the ETP and in situ production. The work proposed here will lead to a more nuanced understanding of N2O production, transport, and fate in the tropical Pacific.</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>
Equatorial N2O
largerWorkCitation
project
eng; USA
oceans
Tahiti, FP to Honolulu, Hawaii; San Diego, CA, USA to Hanga Roa, Chile; Hobart - Wellington (NZ) - Lautoka (Fiji)
-170.059
-102.997
-22.999
22.999
2015-04-11
2016-12-21
Equatorial Pacific Ocean
0
BCO-DMO catalogue of parameters from Nitrous oxide (N2O) and transient tracer (chlorofluorocarbons, sulfur hexafluoride) concentrations from samples collected on three GO-SHIP cruises in the tropical Pacific Ocean during 2015-2016
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/944982.rdf
Name: Cruise
Units: unitless
Description: <p>GO-SHIP cruise ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/944983.rdf
Name: Station
Units: unitless
Description: <p>station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/944984.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) when sample was taken in ISO 8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/944985.rdf
Name: Longitude_360
Units: decimal degrees
Description: <p>longitude sample was taken in degrees East (0-360)</p>
http://lod.bco-dmo.org/id/dataset-parameter/944986.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Longitude in degrees East (-180 to 180); negative values = West direction</p>
http://lod.bco-dmo.org/id/dataset-parameter/944987.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Latitude in degrees North; negative values = South direction</p>
http://lod.bco-dmo.org/id/dataset-parameter/944988.rdf
Name: Bot_Depth
Units: meters (m)
Description: <p>depth of the seafloor</p>
http://lod.bco-dmo.org/id/dataset-parameter/944989.rdf
Name: Pressure
Units: decibars (db)
Description: <p>pressure at the depth sample was taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/944990.rdf
Name: SAMPNO
Units: unitless
Description: <p>sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/944991.rdf
Name: SAMPNO_QF
Units: unitless
Description: <p>sample number quality flag</p>
http://lod.bco-dmo.org/id/dataset-parameter/944992.rdf
Name: TEMPERATURE
Units: degrees Celsius
Description: <p>temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/944993.rdf
Name: CFC11
Units: picomoles per kilogram (pmol/kg)
Description: <p>CFC-11 concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/944994.rdf
Name: CFC11_QF
Units: unitless
Description: <p>CFC-11 concentration quality flag</p>
http://lod.bco-dmo.org/id/dataset-parameter/944995.rdf
Name: CFC12
Units: picomoles per kilogram (pmol/kg)
Description: <p>CFC-12 concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/944996.rdf
Name: CFC12_QF
Units: unitless
Description: <p>CFC-12 concentration quality flag</p>
http://lod.bco-dmo.org/id/dataset-parameter/944997.rdf
Name: SF6
Units: femptomoles per kilogram (fmol/kg)
Description: <p>SF6 concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/944998.rdf
Name: SF6_QF
Units: unitless
Description: <p>SF6 concentration quality flag</p>
http://lod.bco-dmo.org/id/dataset-parameter/944999.rdf
Name: CTD_SALINITY
Units: unitless
Description: <p>salinity [PSS-78] from Seabird SBE9plus</p>
http://lod.bco-dmo.org/id/dataset-parameter/945000.rdf
Name: CTD_SALINITY_QF
Units: unitless
Description: <p>salinity from Seabird SBE9plus quality flag</p>
http://lod.bco-dmo.org/id/dataset-parameter/945001.rdf
Name: N2O
Units: nanomoles per kilogram (nmol/kg)
Description: <p>N2O concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/945002.rdf
Name: N2O_QF
Units: unitless
Description: <p>N2O concentration quality flag</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
741575
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/2a9bf012-7863-4228-b25f-fda2f7ad0056/content
download
https://doi.org/10.26008/1912/bco-dmo.944886.1
download
onLine
dataset
<p>Water samples were collected in bottles designed with a modified end-cap to minimize the contact of the water sample with the end-cap O-rings after closing. Stainless steel springs covered with a nylon powder coat were substituted for the internal elastic tubing provided with standard Niskin bottles. When taken, water samples collected for dissolved CFC/SF6/N2O analyses were the first samples drawn from the bottles. To minimize contact with air, the CFC/SF6/N2O samples were drawn directly through the stopcocks of the bottles into 250-milliliter (ml) precision glass syringes equipped with three-way plastic stopcocks. The syringes were immersed in a holding tank of clean surface seawater held at ~10 degrees Celsius (°C) until 20 minutes before being analyzed. At that time, the syringe was placed in a bath of surface seawater heated to 32°C.</p>
<p>Concentrations of CFC/SF6/N2O in seawater and gas standards were measured by shipboard electron capture detector gas chromatography (ECD-GC) using techniques modified from those described by Bullister and Wisegarver (2008), as outlined below. For seawater analyses, water was transferred from a glass syringe to a glass-sparging chamber (volume 200 ml). The dissolved gases in the seawater sample were extracted by passing a supply of CFC/SF6/N2O-free N2 through the sparging chamber for a period of 6 minutes at 150 milliliters per minute (ml min-1). Water vapor was removed from the purge gas during passage through a Nafion drier. Carbon dioxide was removed with an 18-centimeter (cm) long, 3/8-inch diameter glass tube packed with Ascarite and a small amount of magnesium perchlorate desiccant. The sample gases were concentrated on a cold-trap consisting of a 1/16-inch OD stainless steel tube with a 2.5 cm section packed tightly with Porapak Q, a 15 cm section packed with Carboxen 1000 and a 2.5 cm section packed with MolSieve 5 angstrom (Å). A Neslab Cryocool CC-100 was used to cool the trap to -65°C. After 6 minutes of purging, the trap was isolated, and heated electrically to 170°C. The sample gases held in the trap were then injected onto a precolumn (~61 cm of 1/8-inch OD stainless steel tubing packed with Porasil B, held at 80°C) for the initial separation of CFC-12, CFC-11, SF6 from later eluting peaks.</p>
<p>After the SF6 and CFC-12 had passed from the pre-column and into the second pre-column (26 cm of 1/8-inch OD stainless steel tubing packed with MolSieve 5Å, 160°C) and into the analytical column #1 (174 cm of 1/8-inch OD stainless steel tubing packed with MolSieve 5Å and 60 cm Porasil C held at 80°C), the outflow from the first pre-column was diverted to the second analytical column (180 cm 1/8-inch OD stainless steel tubing packed with Porasil B held at 80°C). The gases remaining after CFC- 11 had passed through the first pre-column, were backflushed from the precolumn and vented. After CFC-12 had passed through the second pre-column, a flow of Argon:Methane (95:5) was used to divert the N2O to a third analytical column (30 cm of MolSieve 5Å, 150°C). Column #3 and the second pre-column were held in a Shimadzu GC8AIE gas chromatograph with an electron capture detector (ECD) held at 330°C. Columns #1, and the first pre-column were in another Shimadzu GC8AIE gas chromatograph with ECD. The column #2 was also in a Shimadzu GC8AIE gas chromatograph with the ECD held at 330°C.</p>
<p>The analytical system was calibrated frequently using a standard gas of known CFC/SF6/N2O composition. Gas sample loops of known volume were thoroughly flushed with standard gas and injected into the system. The temperature and pressure was recorded so that the amount of gas injected could be calculated. The procedures used to transfer the standard gas to the trap, pre-columns, main chromatographic column, and ECD were similar to those used for analyzing water samples. Four sizes of gas sample loops were used. Multiple injections of these loop volumes could be made to allow the system to be calibrated over a relatively wide range of concentrations. System blanks (injections of loops of CFC/SF6/N2O-free gas) were injected and analyzed in a similar manner. The typical analysis time for seawater, standard or blank samples was ~12 minutes. Concentrations of CFC-11, CFC-12, and N2O in seawater samples and gas standards are reported relative to the SIO98 calibration scale (Prinn et al., 2000). Concentrations of SF6 in seawater samples and gas standards are reported relative to the SIO-2005 calibration scale (Bullister and Tanhua, 2010). Dissolved CFC concentrations are given in units of picomoles per kilogram seawater (pmol kg-1), SF6 concentrations in femtomoles per kilogram (fmol kg-1), and N2O concentrations in nanomoles per kilogram (nmol kg-1). CFC/SF6/N2O concentrations in seawater samples were determined by fitting their chromatographic peak areas to multi-point calibration curves, generated by injecting multiple sample loops of gas from a working standard into the analytical instrument. The response of the detector to the range of moles of CFC/SF6/N2O passing through the detector remained relatively constant during the cruise. Full-range calibration curves were run at several times during the cruise and partial curves were run as frequently as possible, usually while sampling. Single injections of a fixed volume of standard gas at one atmosphere were run much more frequently (at intervals of 90 minutes) to monitor short-term changes in detector sensitivity.</p>
<p>The purging efficiency was estimated by re-purging a high-concentration water sample and measuring the residual signal. At a flow rate of 150 ml min-1 for 6 minutes, the purging efficiency for SF6 and both CFC gases was &gt;99%. The efficiency for N2O was typically about 96%.</p>
Specified by the Principal Investigator(s)
<p>Data acquisition and processing of temperature/condutivity/depth was done using manufacturer's software (Seabird Scientific, Inc.).</p>
<p>Data acquisition and processing of CFC/SF6/N2O was done using custom software (GCWerks, Inc.).</p>
<p><strong>Quality flags</strong> are assigned using the Ocean Data View quality flag scheme (<a href="https://odv.awi.de/fileadmin/user_upload/odv/docs/ODV_quality_flag_sets.pdf" target="_blank">https://odv.awi.de/fileadmin/user_upload/odv/docs/ODV_quality_flag_sets.pdf</a>) where:<br />
<br />
Good = 0;<br />
Unknown = 1;<br />
Questionable = 4;<br />
Bad = 8.</p>
Specified by the Principal Investigator(s)
- Imported original files "P16N_BCO-DMO.csv", "P15S_BCO-DMO.csv", and "P18_BCO-DMO.csv" into the BCO-DMO system.
- Marked the following as missing data identifers: "-9,-9.0,-9.00,-9.000,-9.0000,-999,-999.0". Missing data values are empty/blank in the final CSV file.
- Concatenated the three data files into one single data file.
- Renamed fields to comply with BCO-DMO naming conventions.
- Created date/time UTC column in ISO 8601 format; removed the original date/time fields.
- Converted longitude values from a 0-360 scale to minus 180 to 180. (negative values = West)
- Saved the final data file as "944886_v1_N2O_and_transient_tracers.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
Seabird SBE9plus CTD
Seabird SBE9plus CTD
PI Supplied Instrument Name: Seabird SBE9plus CTD PI Supplied Instrument Description:Temperature, conductivity, depth were measured using Seabird SBE9plus CTDs. Instrument Name: CTD Sea-Bird Instrument Short Name:CTD Sea-Bird Instrument Description: A Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics. This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/ Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Niskin bottles
Niskin bottles
PI Supplied Instrument Name: Niskin bottles PI Supplied Instrument Description:Seawater samples were collected using ~10L Niskin bottles. 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/
Shimadzu GC8AIE
Shimadzu GC8AIE
PI Supplied Instrument Name: Shimadzu GC8AIE PI Supplied Instrument Description:CFC/SF6/N2O concentrations were measured using Shimadzu GC8AIEs. Instrument Name: Shimadzu GC-8AIE gas chromatograph Instrument Short Name:Shimadzu GC-8AIE Instrument Description: A gas chromatograph that separates and analyses gas mixtures in water or air for dedicated applications. The instrument includes a single column injector, one pressure regulator, capillary column, Electron Capture Detector (ECD) and analogue output. The column oven has a two-stage overheat prevention for protection of columns. The injection port is on-column type whereby the solution is directly injected into the head of a glass column. The constant-current ECD maintains a constant current flow in the detector. The isothermal temperature ramp program holds the column oven at a set temperature throughout the analysis.
Cruise: RB1503_leg1
RB1503_leg1
Community Standard Description
International Council for the Exploration of the Sea
NOAA Ship Ronald H. Brown
vessel
RB1503_leg1
Jessica Cross
http://dx.doi.org/10.7942/C2WC7C
Report describing RB1503_leg1
Cruise: RB1606_leg1
RB1606_leg1
Community Standard Description
International Council for the Exploration of the Sea
NOAA Ship Ronald H. Brown
vessel
RB1606_leg1
Brendan Carter
National Oceanic and Atmospheric Administration
http://dx.doi.org/10.7942/C21T0F
Report describing RB1606_leg1
Cruise: IN2016_V03
IN2016_V03
R/V Investigator
Community Standard Description
International Council for the Exploration of the Sea
R/V Investigator
vessel
IN2016_V03
Susan Wijffles
Commonwealth Scientific and Industrial Research Organisation
https://cchdo.ucsd.edu/data/12704/096U20160426_do.pdf
Report describing IN2016_V03
Community Standard Description
International Council for the Exploration of the Sea
NOAA Ship Ronald H. Brown
vessel
R/V Investigator
Community Standard Description
International Council for the Exploration of the Sea
R/V Investigator
vessel