http://lod.bco-dmo.org/id/dataset/770818
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
2019-06-18
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Water column nitrate+nitrite d15N and d18O and total dissolved nitrogen d15N measurements from R/V Ka`imikai-O-Kanaloa cruise KOK1806 (HOT LAVA) in July 2018
2019-06-18
publication
2019-06-18
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-06-18
publication
https://doi.org/10.1575/1912/bco-dmo.770818.1
Angela N. Knapp
Florida State University
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: Knapp, A. N. (2019) Water column nitrate+nitrite d15N and d18O and total dissolved nitrogen d15N measurements from R/V Ka`imikai-O-Kanaloa cruise KOK1806 (HOT LAVA) in July 2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-06-18 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.770818.1 [access date]
Water column nitrate+nitrite d15N and d18O and total dissolved nitrogen d15N measurements Dataset Description: <p>This results of this dataset are published in Wilson <em>et al., </em>2019</p>
<p>This data set includes water column nitrate+nitrite and total dissolved nitrogen d15N measurements. These measurements were used to address the source of nitrate+nitrite in surface waters observed after the 2018 Kilauea eruption entered the ocean, leading to enhanced surface ocean chlorophyll. The results are consistent with an upwelling source of nitrate+nitrite from ~400 m driven by hot lava entering the ocean, leading to increased buoyancy of waters, driving "roils" (see F. J. Sansone, and J. A. Resing, 1995, J. Geophys. Res. Oceans). These data are also used as evidence that biological nitrogen fixation did not contribute to the nitrate+nitrite observed in surface waters.</p> Methods and Sampling: <p>Some water samples were collected by Niskin bottle on a CTD rosette ("CTD profile"), while others were collected using a trace metal clean "Towfish" that was running along side the ship and collected trace metal clean underway samples ~1 m below the sea surface.</p>
<p>NO3-+NO2- d15N and d18O and TDN δ15N analysis was by the "denitrifier method" and followed the methods described by Sigman et al., 2001, Casciotti et al., 2002, McIlvin and Casciotti, 2011, and Weigand et al., 2016. Briefly, NO3-+NO2- was quantitatively reduced to N2O by Pseudomonas aureofaciens and Pseudomonas chlororaphis, which was then cryogenically focused and analyzed on an isotope ratio mass spectrometer. A volume of sample was added to each bacterial vial to achieve a final quantity of 10 or 20 nmols N2O, which was then purged from the vial using a helium carrier gas. The d15N of N2O in samples was calibrated with the international isotopic reference materials</p>
<p>The δ15N of TDN was measured using persulfate oxidation of DON to NO3- followed by the denitrified method as described in Knapp et al. (2005).</p>
<p>Nitrate+nitrite concentration was measured by others (Karl lab, U. Hawaii) using colorimetric methods, and total dissolved nitrogen concentration was measured by others (Karl lab, U. Hawaii) using uv-oxidation and subsequent colorimetric analysis. Both of these data sets can be found at: <a href="http://scope.soest.hawaii.edu/data/" target="_blank">http://scope.soest.hawaii.edu/data/</a></p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1537314 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1537314
completed
Angela N. Knapp
Florida State University
(979) 862-5235
797 Lamar St. Dept of Oceanography, Eller O&M Room 1204
College Station
TX
77843
USA
aknapp@tamu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station_Number
Towfish_or_CTD_profile_station
Depth
Date
Lat_N
Longitude_E
Karl_HI_NO3_NO2
Knapp_NO3_NO2_d15N
Knapp_NO3_NO2_d15N_std_dev
Knapp_NO3_NO2_d18O
Knapp_NO3_NO2_d18O_std_dev
Karl_TDN
Knapp_TDN_d15N
Knapp_TDN_d15N_std_dev
Towfish
Thermo Finnigan Delta V
Niskin bottle (CTD rosette)
theme
None, User defined
station
instrument
depth
date
latitude
longitude
nitrate plus nitrite
delta 15N NO3+NO2
No BCO-DMO term
Total Dissolved Nitrogen
15N of Total Particulate Nitrogen
featureType
BCO-DMO Standard Parameters
GeoFish Towed near-Surface Sampler
Isotope-ratio Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
KOK1806
service
Deployment Activity
Hilo to Honolulu, HI
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.
Quantifying nitrogen fixation along unique geochemical gradients in the southwest Pacific Ocean
http://scope.soest.hawaii.edu/data/lava/lava.html
Quantifying nitrogen fixation along unique geochemical gradients in the southwest Pacific Ocean
<p><em>NSF Award Abstract:</em><br />
The availability of nitrogen in the surface ocean plays a critical role regulating rates of primary productivity in the ocean, and thus through modification of the carbon cycle, nitrogen has the capacity to influence climate. The dominant source of biologically available nitrogen to the ocean is through a process known as di-nitrogen (N2) fixation, which involves the reduction of N2 gas dissolved in seawater to ammonium by microbes referred to as diazotrophs. While significant progress has been made identifying a diversity of marine diazotrophs in recent years using molecular tools, quantifying global rates of N2 fixation, and identifying which ocean basin supports the highest fluxes, has remained a vexing question. This research will quantify rates of N2 fixation as well as its importance for supporting production in the southwest Pacific Ocean. Results from this research will shed light on the sensitivities of N2 fixation (temperature, iron concentrations) as well as the extent of spatial and temporal coupling of nitrogen sources and sinks in the ocean. The work will be carried out by an early career scientist, and involve mentoring of young women, middle school girls and minorities, training of undergraduate and graduate researchers, and international collaborations.</p>
<p>Identifying the spatial distribution of the largest di-nitrogen (N2) fixation fluxes to the ocean remains a critical goal of chemical oceanography. The spatial distribution can inform our understanding of the environmental sensitivities of N2 fixation and the capacity for the dominant marine nitrogen (N) source and sink processes to respond to each other and thus influence the global carbon cycle and climate. In addition to temperature, two factors are at the heart of the current debate over what influences the spatial distribution of N2 fixation in the ocean: 1) the presence of adequate iron to meet the needs of N2 fixing microbes, and, 2) the absolute concentrations as well as ratios of surface ocean nitrate and phosphate concentrations that are low relative to the "Redfield" ratio, which are thought to favor N2 fixing microbes. This project will test the effects of gradients in atmospheric dust deposition on N2 fixation rates when surface waters have relatively constant but favorable nitrate to phosphate concentrations. The work will be carried out in the southwest Pacific, a region highlighted by new modeling work for its unique geochemical characteristics that are expected to favor significant N2 fixation fluxes. Nitrate+nitrite d15N as well as total dissolved nitrogen (TDN) concentration and d15N will be measured in water column samples collected on a French cruise and sediment traps were deployed to capture the sinking particulate N flux. The results will be compared with published work to evaluate which ocean regions support the largest N2 fixation fluxes.</p>
<p>More information:</p>
<p>This project was part of the Oligotrophy to UlTra-oligotrophy PACific Experiment (OUTPACE) cruise in the Southwest Pacific between New Caledonia (166°28' E; 22°14' S) and Tahiti (149°36' W; 17°34' S) 0-2000 m<br />
* OUTPACE cruise (doi: <a href="http://dx.doi.org/10.17600/15000900" target="_blank">http://dx.doi.org/10.17600/15000900</a>)<br />
* OUTPACE website: <a href="https://outpace.mio.univ-amu.fr/?lang=en">https://outpace.mio.univ-amu.fr/?lang=en</a></p>
SW Pac N2 fixation
largerWorkCitation
project
eng; USA
oceans
Hilo to Honolulu, HI
-154.829
-154.71
19.373
19.45
2018-07-14
2018-07-14
Southwest Pacific Ocean between New Caledonia and Tahiti along ~18 deg S
0
BCO-DMO catalogue of parameters from Water column nitrate+nitrite d15N and d18O and total dissolved nitrogen d15N measurements from R/V Ka`imikai-O-Kanaloa cruise KOK1806 (HOT LAVA) in July 2018
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/770841.rdf
Name: Station_Number
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/770842.rdf
Name: Towfish_or_CTD_profile_station
Units: unitless
Description: <p>Sampling system (either towfish or CTD rosette)</p>
http://lod.bco-dmo.org/id/dataset-parameter/770843.rdf
Name: Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/770844.rdf
Name: Date
Units: unitless
Description: <p>Date of collection. Format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/770845.rdf
Name: Lat_N
Units: degrees
Description: <p>Latitude North</p>
http://lod.bco-dmo.org/id/dataset-parameter/770846.rdf
Name: Longitude_E
Units: degrees
Description: <p>Longitude East</p>
http://lod.bco-dmo.org/id/dataset-parameter/770847.rdf
Name: Karl_HI_NO3_NO2
Units: micromolar (uM)
Description: <p>Nitrate+nitrite concentration; measured in Karl lab at U. Hawaii using colorimetric methods</p>
http://lod.bco-dmo.org/id/dataset-parameter/770848.rdf
Name: Knapp_NO3_NO2_d15N
Units: per mil
Description: <p>Nitrate+nitrite d15N</p>
http://lod.bco-dmo.org/id/dataset-parameter/770849.rdf
Name: Knapp_NO3_NO2_d15N_std_dev
Units: per mil
Description: <p>Standard deviation of Knapp_NO3_NO2_d15N</p>
http://lod.bco-dmo.org/id/dataset-parameter/770850.rdf
Name: Knapp_NO3_NO2_d18O
Units: per mil
Description: <p>Nitrate+nitrite d18O</p>
http://lod.bco-dmo.org/id/dataset-parameter/770851.rdf
Name: Knapp_NO3_NO2_d18O_std_dev
Units: per mil
Description: <p>Standard deviation of Knapp_NO3_NO2_d18O</p>
http://lod.bco-dmo.org/id/dataset-parameter/770852.rdf
Name: Karl_TDN
Units: micromolar (uM)
Description: <p>Total dissolved nitrogen concentration; measured in Karl lab at U. Hawaii using uv-oxidation and subsequent colorimetric analysis</p>
http://lod.bco-dmo.org/id/dataset-parameter/770853.rdf
Name: Knapp_TDN_d15N
Units: per mil
Description: <p>Total dissolved nitrogen ?15N</p>
http://lod.bco-dmo.org/id/dataset-parameter/770854.rdf
Name: Knapp_TDN_d15N_std_dev
Units: per mil
Description: <p>Standard deviation of Knapp_TDN_d15N</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
2639
https://darchive.mblwhoilibrary.org/bitstream/1912/24278/1/dataset-770818_hot-lava-nitrogen__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.770818.1
download
onLine
dataset
<p>Some water samples were collected by Niskin bottle on a CTD rosette ("CTD profile"), while others were collected using a trace metal clean "Towfish" that was running along side the ship and collected trace metal clean underway samples ~1 m below the sea surface.</p>
<p>NO3-+NO2- d15N and d18O and TDN δ15N analysis was by the "denitrifier method" and followed the methods described by Sigman et al., 2001, Casciotti et al., 2002, McIlvin and Casciotti, 2011, and Weigand et al., 2016. Briefly, NO3-+NO2- was quantitatively reduced to N2O by Pseudomonas aureofaciens and Pseudomonas chlororaphis, which was then cryogenically focused and analyzed on an isotope ratio mass spectrometer. A volume of sample was added to each bacterial vial to achieve a final quantity of 10 or 20 nmols N2O, which was then purged from the vial using a helium carrier gas. The d15N of N2O in samples was calibrated with the international isotopic reference materials</p>
<p>The δ15N of TDN was measured using persulfate oxidation of DON to NO3- followed by the denitrified method as described in Knapp et al. (2005).</p>
<p>Nitrate+nitrite concentration was measured by others (Karl lab, U. Hawaii) using colorimetric methods, and total dissolved nitrogen concentration was measured by others (Karl lab, U. Hawaii) using uv-oxidation and subsequent colorimetric analysis. Both of these data sets can be found at: <a href="http://scope.soest.hawaii.edu/data/" target="_blank">http://scope.soest.hawaii.edu/data/</a></p>
Specified by the Principal Investigator(s)
<p>BCO-DMO Processing:<br />
- modified parameter names (replaced spaces w/ underscores, shortened "D. Karl/Hawaii" to "Karl"),<br />
- re-formatted date to yyyy-mm-dd (was m/dd/yyyy),<br />
- replaced "no data" with "nd".</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
Towfish
Towfish
PI Supplied Instrument Name: Towfish Instrument Name: GeoFish Towed near-Surface Sampler Instrument Short Name:GeoFish Instrument Description: The GeoFish towed sampler is a custom designed near surface (2 meters or less) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/31/
Thermo Finnigan Delta V
Thermo Finnigan Delta V
PI Supplied Instrument Name: Thermo Finnigan Delta V 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/
Niskin bottle (CTD rosette)
Niskin bottle (CTD rosette)
PI Supplied Instrument Name: Niskin bottle (CTD rosette) 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/
Cruise: KOK1806
KOK1806
R/V Ka`imikai-O-Kanaloa
Community Standard Description
International Council for the Exploration of the Sea
R/V Ka`imikai-O-Kanaloa
vessel
KOK1806
David M. Karl
University of Hawaiʻi at Mānoa
http://datadocs.bco-dmo.org/docs/SW_Pac_N2_fixation/data_docs/KOK1806_cruise_report.pdf
Report describing KOK1806
R/V Ka`imikai-O-Kanaloa
Community Standard Description
International Council for the Exploration of the Sea
R/V Ka`imikai-O-Kanaloa
vessel