http://lod.bco-dmo.org/id/dataset/555713
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
2015-04-10
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
PNsink mass flux and d15N from floating sediment trap deployments collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP project)
2015-04-09
publication
2015-04-09
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2015-04-16
publication
https://doi.org/10.1575/1912/7227
Douglas G. Capone
University of Southern California
principalInvestigator
William M. Berelson
University of Southern California
principalInvestigator
Dennis Hansell
University of Miami Rosenstiel School of Marine and Atmospheric Science
principalInvestigator
Douglas E. Hammond
University of Southern California
principalInvestigator
Angela N. Knapp
University of Miami Rosenstiel School of Marine and Atmospheric Science
principalInvestigator
Maria Prokopenko
University of Southern California
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: Capone, D., Berelson, W., Casciotti, K., Hansell, D., Knapp, A. (2015) Eastern Tropical South Pacific Nitrogen fixation. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2015-04-09) Version Date 2015-04-09 [if applicable, indicate subset used]. doi:10.1575/1912/7227 [access date]
PNsink mass flux and d15N from floating sediment trap deployments Dataset Description: Methods and Sampling: <p><strong>Sinking particulate nitrogen (PNsink) mass and d15N analysis:</strong>&nbsp;Sinking particulate material was collected using surface-tethered floating particle-interceptor traps (PIT) equipped with 12 polycarbonate cylinders, deployed for up to 70 hours. Floating sediment traps were deployed at 200 m at Stations 3 and 5 on the 2010 cruise; for all other stations, traps were deployed at 100 m. Sediment trap samples were collected into a brine solution and then filtered and split into replicate samples. In most cases, two splits were collected from each sediment trap, one of which was acidified to remove inorganic carbon. In 2010 filtration removed the contribution of “swimmers” from sediment trap material.&nbsp;On the 2011 cruise, “swimmers” were identified by dissecting microscopy and hand-picked from sediment trap samples using sterilized micropipettors and forceps to remove their isotopic contribution to the sinking flux. Mass and isotopic fluxes were determined by dividing the mass of sinking particulate material captured in each trap by the trap surface area and by the duration (hrs) of trap deployment. Subsequently, the total mass flux was multiplied by the %N determined by combustion analysis of trap samples at the UC Davis Stable Isotope Facility to calculate PNsink mass fluxes; the d15N of trap samples was determined at the same time. The limit of detection for combustion analysis is 1.5 µmols N and the precision of the d15N measurement is + 0.3‰. No systematic difference was observed in the d15N of acidified vs. non-acidified trap samples.</p>
<p><strong>References:</strong></p>
<p>Soutar, A., Kling, S. A., Crill, P. A. &amp; Duffrin, E. MONITORING MARINE-ENVIRONMENT THROUGH SEDIMENTATION. Nature 266, 136-139, doi:10.1038/266136a0 (1977).</p>
<p>Knauer, G. A., Martin, J. H. &amp; Bruland, K. W. Fluxes of particulate carbon, nitrogen, and phosphorus in the upper water column of the northeast Pacific. Deep-Sea Research 26, 97-108, doi:10.1016/0198-0149(79)90089-X (1979).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0850801 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0850801
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0850905 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0850905
completed
Douglas G. Capone
University of Southern California
213-740-2772
616 Trousdale Parkway AHF 246
Los Angeles
CA
90089
USA
capone@usc.edu
pointOfContact
William M. Berelson
University of Southern California
310-804-8981
Department of Earth Sciences (ZHS 227) 3651 Trousdale Pky.
Los Angeles
CA
90089-0740
USA
berelson@usc.edu
pointOfContact
Dennis Hansell
University of Miami Rosenstiel School of Marine and Atmospheric Science
305-421-4078
Coral Gables
FL
33124
USA
dhansell@miami.edu
pointOfContact
Douglas E. Hammond
University of Southern California
310-490-7896
3651 Trousdale Pkwy Earth Sciences ZHS117
Los Angeles
CA
90089-0740
USA
dhammond@usc.edu
pointOfContact
Angela N. Knapp
University of Miami Rosenstiel School of Marine and Atmospheric Science
(979) 862-5235
797 Lamar St. Dept of Oceanography, Eller O&M Room 1204
College Station
TX
77843
USA
aknapp@tamu.edu
pointOfContact
Maria Prokopenko
University of Southern California
323-630-4068
185 E Sixth St
Claremont
CA
91711-4434
US
Maria.Prokopenko@pomona.edu
pointOfContact
asNeeded
Dataset Version: 2015-04-09
Unknown
date
station
lat
lon
depth
traps_per_depth
duration
PNsink_flux
PNsink_flux_sd
del15N_PNsink
del15N_PNsink_sd
cruise_id
dissecting microscope
Sed Trap - Float
theme
None, User defined
date_local
station number
latitude
longitude
depth
number of replicates
duration
PNsink
standard deviation
delta 15N PN sink
Cruise identfier
featureType
BCO-DMO Standard Parameters
Microscope - Optical
Sediment Trap - Floating
instrument
BCO-DMO Standard Instruments
AT15-61
MV1104
service
Deployment Activity
Eastern Tropical South Pacific
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: Documenting N2 fixation in N deficient waters of the Eastern Tropical South Pacific
https://osprey.bco-dmo.org/project/555496
Collaborative Research: Documenting N2 fixation in N deficient waters of the Eastern Tropical South Pacific
<p><em>Description from NSF award abstract:</em><br />
Several independent lines of geochemical and remote sensing evidence suggest that dinitrogen (N2) fixation may be associated with surface waters downstream of major oxygen minimum zones (OMZs) and in particular in the Eastern Tropical South Pacific (ETSP). However, little direct evidence supports these inferences. Besides substantiating these indirect assessments, documenting significant N2 fixation in the ETSP would provide insight into two longstanding controversies: Is the marine N budget balanced, as implied by modeling and paleoceanographic data, and if so, how are the processes that add and remove N spatially, and thus temporally coupled?</p>
<p>In this project researchers at the University of Southern California and the University of Miami will test the hypothesis that fixation occurs in the ETSP at areal rates that equal or exceed those previously documented in more well-studied regions such as the oligotrophic waters of the sub/tropical North Atlantic. If scaled to the surface area of ETSP waters, this could add an additional 10-50 Tg N per year of inputs to the global marine N budget. They will undertake two cruises in the ETSP during early and late summer in two consecutive years to assess the quantitative significance of N2 fixation as a source of new N to surface waters using complementary biological and geochemical tools. N2 fixation rates will be evaluated on two temporal/spatial scales: daily/local (bottle 15N2 incubations and floating sediment traps); and seasonal/regional (d15N budget using moored sediment traps and water column TDN d15N). These estimates provide detailed observations of potential N2 fixation during station occupation in two summer seasons, when rates are expected to be greatest, as well as prolonged observation over lower expected N2 fixation periods. A combination of these different estimates will aim to determine if N2 fixation in this region can help balance the marine N budget. If all goes as planned, this study will determine the quantitative importance of N2 fixation in the ETSP, and whether these previously undocumented rates can help resolve the marine N budget. Implications include the ability of the marine N cycle to maintain homeostasis, and thus the global C cycle on glacial/interglacial time scales.</p>
N2 fixation ETSP
largerWorkCitation
project
eng; USA
oceans
Eastern Tropical South Pacific
2015-04-09
Eastern Tropical South Pacific
0
BCO-DMO catalogue of parameters from PNsink mass flux and d15N from floating sediment trap deployments collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP 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/555755.rdf
Name: date
Units: unitless
Description: <p>sample collection date (local). Format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/555756.rdf
Name: station
Units: unitless
Description: <p>station</p>
http://lod.bco-dmo.org/id/dataset-parameter/555757.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude; north is positive</p>
http://lod.bco-dmo.org/id/dataset-parameter/555758.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude; east is positive</p>
http://lod.bco-dmo.org/id/dataset-parameter/555759.rdf
Name: depth
Units: meters
Description: <p>Depth trap was deployed</p>
http://lod.bco-dmo.org/id/dataset-parameter/555760.rdf
Name: traps_per_depth
Units: unit
Description: <p>Number of traps deployed per depth (Total # sample splits)</p>
http://lod.bco-dmo.org/id/dataset-parameter/555761.rdf
Name: duration
Units: hours
Description: <p>Length of trap deployment</p>
http://lod.bco-dmo.org/id/dataset-parameter/555776.rdf
Name: PNsink_flux
Units: milli mol N m-2 d-1
Description: <p>Particulate Nitrogen sinking mass flux</p>
http://lod.bco-dmo.org/id/dataset-parameter/555777.rdf
Name: PNsink_flux_sd
Units: milli mol N m-2 d-1
Description: <p>Particulate Nitrogen sinking mass flux; 1 standard deviation</p>
http://lod.bco-dmo.org/id/dataset-parameter/555778.rdf
Name: del15N_PNsink
Units: per mil
Description: <p>Particulate Nitrogen sinking flux d15N (per mil relative to N2 in air)</p>
http://lod.bco-dmo.org/id/dataset-parameter/555779.rdf
Name: del15N_PNsink_sd
Units: per mil
Description: <p>Particulate Nitrogen sinking flux d15N (per mil relative to N2 in air); 1 standard deviation</p>
http://lod.bco-dmo.org/id/dataset-parameter/764195.rdf
Name: cruise_id
Units: unitless
Description: <p>cruise_id</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://doi.org/10.1575/1912/7227
download
onLine
dataset
<p><strong>Sinking particulate nitrogen (PNsink) mass and d15N analysis:</strong>&nbsp;Sinking particulate material was collected using surface-tethered floating particle-interceptor traps (PIT) equipped with 12 polycarbonate cylinders, deployed for up to 70 hours. Floating sediment traps were deployed at 200 m at Stations 3 and 5 on the 2010 cruise; for all other stations, traps were deployed at 100 m. Sediment trap samples were collected into a brine solution and then filtered and split into replicate samples. In most cases, two splits were collected from each sediment trap, one of which was acidified to remove inorganic carbon. In 2010 filtration removed the contribution of “swimmers” from sediment trap material.&nbsp;On the 2011 cruise, “swimmers” were identified by dissecting microscopy and hand-picked from sediment trap samples using sterilized micropipettors and forceps to remove their isotopic contribution to the sinking flux. Mass and isotopic fluxes were determined by dividing the mass of sinking particulate material captured in each trap by the trap surface area and by the duration (hrs) of trap deployment. Subsequently, the total mass flux was multiplied by the %N determined by combustion analysis of trap samples at the UC Davis Stable Isotope Facility to calculate PNsink mass fluxes; the d15N of trap samples was determined at the same time. The limit of detection for combustion analysis is 1.5 µmols N and the precision of the d15N measurement is + 0.3‰. No systematic difference was observed in the d15N of acidified vs. non-acidified trap samples.</p>
<p><strong>References:</strong></p>
<p>Soutar, A., Kling, S. A., Crill, P. A. &amp; Duffrin, E. MONITORING MARINE-ENVIRONMENT THROUGH SEDIMENTATION. Nature 266, 136-139, doi:10.1038/266136a0 (1977).</p>
<p>Knauer, G. A., Martin, J. H. &amp; Bruland, K. W. Fluxes of particulate carbon, nitrogen, and phosphorus in the upper water column of the northeast Pacific. Deep-Sea Research 26, 97-108, doi:10.1016/0198-0149(79)90089-X (1979).</p>
Specified by the Principal Investigator(s)
<p><strong>BCO-DMO Processing:</strong></p>
<p>- added conventional header with dataset name, PI name, version date<br />
- renamed parameters to BCO-DMO standard<br />
- added cruise id column<br />
- replaced blank cells 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
dissecting microscope
dissecting microscope
PI Supplied Instrument Name: dissecting microscope Instrument Name: Microscope - Optical Instrument Short Name: Instrument Description: Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope". Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/
Sed Trap - Float
Sed Trap - Float
PI Supplied Instrument Name: Sed Trap - Float Instrument Name: Sediment Trap - Floating Instrument Short Name:Sed Trap - Float Instrument Description: Floating sediment traps are specially designed sampling devices deployed to float in the water column (as opposed to being secured to a mooring at a fixed depth) for periods of time to collect particles from the water column that are falling toward the sea floor. In general a sediment trap has a container at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. The 'Sediment Trap -Floating' designation is used for a floating type of sediment trap about which no other design details are known. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/33/
Cruise: AT15-61
AT15-61
R/V Atlantis
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantis
vessel
AT15-61
Douglas G. Capone
University of Southern California
Cruise: MV1104
MV1104
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel
MV1104
William M. Berelson
University of Southern California
R/V Atlantis
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantis
vessel
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel