http://lod.bco-dmo.org/id/dataset/717418
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
2017-10-23
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
CTD profiles from R/V Oceanus cruise OC1703A along the Northern California continental shelf in March of 2017 (Deep Sediment N Fix project)
2017-10-25
publication
2017-10-25
revision
BCO-DMO Linked Data URI
2017-10-25
creation
http://lod.bco-dmo.org/id/dataset/717418
Anne E. Dekas
Stanford 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: Dekas, A. E. (2017) CTD profiles from R/V Oceanus cruise OC1703A along the Northern California continental shelf in March of 2017 (Deep Sediment N Fix project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2017-10-25 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/717418 [access date]
CTD Dataset Description: <p>CTD data collected from&nbsp;stations along the Northern California continental shelf at&nbsp;depths ranging from 100 to 4500 meters during R/V Oceanus cruise OC1703A from the 12th to 23rd of&nbsp;March 2017.</p> Methods and Sampling: <p>CTD profiles</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1634297 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1634297
completed
Anne E. Dekas
Stanford University
650-736-1225
473 Via Ortega, Y2E2 Room 140
Stanford
CA
94305-4216
USA
dekas@stanford.edu
pointOfContact
asNeeded
Unknown
cruise
site
CTD_deployment
lat
lon
ISO_DateTime_UTC
PSU
PAR
Temperature
Temperature_2
sigma_t
Beam_Attenuation
Fluorescence
O2_ml_L
Depth_m
Depth_nominal
Sea-Bird SBE 9
theme
None, User defined
Cruise identfier
site
cast
latitude
longitude
ISO_DateTime_UTC
salinity
PAR
water temperature at measurement depth
sigma-t
beam attenuation
fluorescence
dissolved Oxygen
depth
depth nominal
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird 9
instrument
BCO-DMO Standard Instruments
OC1703A
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.
Nitrogen Fixation in Deep-Sea Sediments
https://osprey.bco-dmo.org/project/710001
Nitrogen Fixation in Deep-Sea Sediments
<p><em>NSF Award Abstract:</em><br />
Life requires nitrogen for growth. Atmospheric nitrogen (N2) is the most abundant form of nitrogen on the surface of the planet, but most organisms cannot assimilate N2 directly. Habitats can therefore be nitrogen limited, meaning the demand for "bioavailable" nitrogen exceeds the supply, and its availability controls the overall growth and productivity of the community. A small subset of microorganisms, termed diazotrophs, convert N2 to bioavailable forms of nitrogen, including ammonium and nitrogenous organic matter, in a process known as N2 fixation. Diazotrophs are the largest natural source of bioavailable nitrogen on the planet, and the rate at which they fix N2 can control the rates at which other important microbial processes occur, such as the production and consumption of greenhouse gases. Understanding diazotrophs in the environment - their identity, distribution, activity levels, and biogeochemical controls - is therefore essential to understanding overall microbial community activity and biogeochemical cycling. The goal of this project is to characterize N2 fixation in deep-sea sediments, a generally understudied but expansive habitat, covering nearly two thirds of our planet. The project will have broader impacts via educational outreach, support and training of early career scientists, and scientific impact: since rates of marine methane, carbon dioxide, and nitrous oxide cycling are affected by nitrogen availability, the results will inform our understanding of greenhouse gas cycling in the marine environment, and therefore climate stability, a topic central to global security.</p>
<p>N2 fixation is a critical and intensely studied metabolism in the marine photic zone. Much less is known about N2 fixation in deep-sea sediments, but it could be an important factor in both benthic productivity and ocean-scale elemental cycling. Several observations have suggested or directly detected N2 fixation at localized areas of enhanced productivity on the seafloor (e.g., methane seeps and hydrothermal vents), raising the possibility that deep-sea N2 fixation is widespread. However, few measurements of N2 fixation have been made outside of these anomalous areas, and thus little is known about N2 fixation in the vast majority of the deep ocean floor. Preliminary data suggest N2 fixation does occur in typical deep marine sediment, and is mediated by a diverse set of yet unidentified microorganisms. This project will combine techniques from molecular biology and geochemistry to systematically investigate N2 fixation in representative deep-sea sediments collected along a depth profile (500 to 4500 m water depth) offshore California. The project will determine the (1) rates and distribution of N2 fixation (2) abundance, diversity, and distribution of genes and transcripts associated with N2 fixation (nif) (3) phylogenetic identity of the biological mediators (diazotrophs) and (4) physiochemical controls on diazotrophic community structure and activity. For context, the activity of the non-diazotrophic bacterial community will also be characterized. The results may lead to upward revisions of the estimates of new nitrogen production in the seafloor, and therefore change our understanding of the current balance of the marine nitrogen cycle. Together, this hypothesis-driven characterization of N2 fixation in deep-sea sediments will shed light on an expansive, climatically important, and traditionally understudied habitat, and facilitate more accurate extrapolation of the rates and distribution of N2 fixation on the whole seafloor as well as the metabolic response of the seafloor community to environmental change.</p>
Deep Sediment N Fix
largerWorkCitation
project
eng; USA
oceans
-124.922
-122.544
35.689
37.13467
2017-10-25
California Shelf (36,-123)
0
BCO-DMO catalogue of parameters from CTD profiles from R/V Oceanus cruise OC1703A along the Northern California continental shelf in March of 2017 (Deep Sediment N Fix 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/717603.rdf
Name: cruise
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/717604.rdf
Name: site
Units: meters
Description: <p>Site identifier (format is OC-Nominal depth)</p>
http://lod.bco-dmo.org/id/dataset-parameter/717605.rdf
Name: CTD_deployment
Units: unitless
Description: <p>CTD cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/717606.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude of CTD profile</p>
http://lod.bco-dmo.org/id/dataset-parameter/717607.rdf
Name: lon
Units: decimal degrees
Description: <p>Longitude of CTD profile</p>
http://lod.bco-dmo.org/id/dataset-parameter/717608.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>ISO timestamp based on the ISO 8601:2004(E) standard in format YYYY-mm-ddTHH:MM:SSZ (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/717609.rdf
Name: PSU
Units: Practical Salinity Units (PSU)
Description: <p>Salinity [Seasave name sal00]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717610.rdf
Name: PAR
Units: microEinsteins per meter squared per second (uEinsteins/m2/s)
Description: <p>Photosynthetically Active Radiation (PAR) Irradiance from Biospherical/Licor [Seasave name par]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717611.rdf
Name: Temperature
Units: degrees Celsius (deg C)
Description: <p>Primary temperature (ITS-90) [Seasave name t090C]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717612.rdf
Name: Temperature_2
Units: degrees Celsius (deg C)
Description: <p>Secondary temperature [Seasave name t190C]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717613.rdf
Name: sigma_t
Units: kilograms per meter cubed (kg/m3)
Description: <p>Density; sigma-t [Seasave name sigma-t00]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717614.rdf
Name: Beam_Attenuation
Units: per meter (1/m)
Description: <p>Beam attenuation from WET Labs C-Star [Seasave name CStarAt0]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717615.rdf
Name: Fluorescence
Units: milligrams per meter cubed (mg/m3)
Description: <p>Fluorescence from WET Labs ECO-AFL/FL [Seasave name flECO-AFL]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717616.rdf
Name: O2_ml_L
Units: milliliters per liter (ml/l)
Description: <p>Dissolved oxygen [Seasave name sbeox0ML/L]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717617.rdf
Name: Depth_m
Units: meters (m)
Description: <p>Depth [Seasave name depSM]</p>
http://lod.bco-dmo.org/id/dataset-parameter/717656.rdf
Name: Depth_nominal
Units: meters
Description: <p>Nominal depth of cast</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
161140947
https://datadocs.bco-dmo.org/file/GwwAJv2ILWqVYo/CTD.csv
CTD.csv
Primary data file for dataset ID 717418
download
https://osprey.bco-dmo.org/dataset/717418/data/download
download
onLine
dataset
<p>CTD profiles</p>
Specified by the Principal Investigator(s)
<p>In addition to the data available by clicking the "Get Data" button, the&nbsp;Seasave formatted files originally submitted to BCO-DMO are available for download.&nbsp;<br />
&nbsp;*&nbsp;<a href="http://dmoserv3.bco-dmo.org/data_docs/Deep_Sediment_N_Fix/OC1703A_CTD.zip" target="_blank">OC1703A_CTD.zip</a>&nbsp;(11.2 MB)<br />
* Software used to generate files:&nbsp;Seasave V 7.23.2<br />
<br />
<strong>BCO-DMO Data Manager Processing Notes:</strong><br />
* added a conventional header with dataset name, PI name, version date<br />
* included information in original filenames for ctd number<br />
* NMEA latitude, longitude and UTC time extracted from&nbsp;Seasave V 7.23.2 files.<br />
* NMEA UTC timestamp converted to ISO DateTime format<br />
* Descriptive data parameter names supplied by data contributor were used in the&nbsp;dataset, original seasave variable names are included in the data parameter descriptions.<br />
* seasave header lines were commented out in this dataset. but the original seasave&nbsp;files with all header information are available for download (see zip file link above).</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
Sea-Bird SBE 9
Sea-Bird SBE 9
PI Supplied Instrument Name: Sea-Bird SBE 9 Instrument Name: CTD Sea-Bird 9 Instrument Short Name:CTD SBE 9 Instrument Description: The Sea-Bird SBE 9 is a type of CTD instrument package. The SBE 9 is the Underwater Unit and is most often combined with the SBE 11 Deck Unit (for real-time readout using conductive wire) when deployed from a research vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorometer, altimeter, etc.). Note that in most cases, it is more accurate to specify SBE 911 than SBE 9 since it is likely a SBE 11 deck unit was used. more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Cruise: OC1703A
OC1703A
R/V Oceanus
Community Standard Description
International Council for the Exploration of the Sea
R/V Oceanus
vessel
OC1703A
Anne E. Dekas
Stanford University
R/V Oceanus
Community Standard Description
International Council for the Exploration of the Sea
R/V Oceanus
vessel