Nitrous oxide concentrations from the R/V Falkor expedition FK160115 in the Central Pacific from January to February 2016

Website: https://www.bco-dmo.org/dataset/775849
Data Type: Cruise Results
Version: 0
Version Date: 2019-08-22

Project
» The ProteOMZ Expedition: Investigating Life Without Oxygen in the Pacific Ocean (ProteOMZ (Proteomics in an Oxygen Minimum Zone))
ContributorsAffiliationRole
Santoro, Alyson E.University of Maryland Center for Environmental Science (UMCES/HPL)Principal Investigator
Saito, Mak A.Woods Hole Oceanographic Institution (WHOI)Co-Principal Investigator
Biddle, MathewWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Coverage

Spatial Extent: N:17 E:156 S:-10.563 W:139.8
Temporal Extent: 2016-01-17 - 2016-02-04

Dataset Description

Falkor ProteOMZ nitrous oxide from expedition (FK160115) in the Central Pacific in 2016.


Acquisition Description

Nitrous oxide concentration: N2O concentrations were measured using a headspace equilibration method and analyzed on a SRI Greenhouse Gas Monitoring Gas Chromatograph (GC) equipped with an electron capture detector (ECD), dual HayeSep D packed columns, and a 1-mL sample loop (SRI Instruments, Torrance, California, USA; Elkins 1980; Laperriere et al. 2019). N2O concentrations were calculated according to Walter et al. (2006). 


Processing Description

BCO-DMO Processing Notes:
 - added conventional header with dataset name, PI name, version date
 - modified parameter names to conform with BCO-DMO naming conventions
 - combined date and time columns to form ISO Date format in column ISO_DateTime_UTC

 


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Parameters

ParameterDescriptionUnits
ISO_DateTime_UTCDate time time of cast following ISO 8601 convention in UTC unitless
stationStation number unitless
ctdCTD cast number unitless
latitudelatitude of station; North is positive; negative denotes South decimal degrees
longitudelongitude station East is positive; negative denotes West decimal degrees
niskinNiskin bottle number unitless
depthdepth of sampling meters (m)
salinitySalinity from CTD practical salinity units (PSU)
temperatureTemperature from CTD Celsius (C)
n2o_1Nitrous oxide concentration replicate 1 nanomoles per liter (nmol/L)
n2o_2Nitrous oxide concentration replicate 2 nanomoles per liter (nmol/L)
n2o_3Nitrous oxide concentration replicate 3 nanomoles per liter (nmol/L)
n2o_4Nitrous oxide concentration replicate 4 nanomoles per liter (nmol/L)
n2o_5Nitrous oxide concentration replicate 5 nanomoles per liter (nmol/L)


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Instruments

Dataset-specific Instrument Name
CTD
Generic Instrument Name
CTD profiler
Dataset-specific Description
Temperature and Salinity are from CTD
Generic Instrument Description
The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.

Dataset-specific Instrument Name
RI Greenhouse Gas Monitoring Gas Chromatograph
Generic Instrument Name
Gas Chromatograph
Dataset-specific Description
Nitrous oxide concentration: N2O concentrations were measured using a headspace equilibration method and analyzed on a SRI Greenhouse Gas Monitoring Gas Chromatograph (GC) equipped with an electron capture detector (ECD), dual HayeSep D packed columns, and a 1-mL sample loop (SRI Instruments, Torrance, California, USA; Elkins 1980; Laperriere et al. 2019).
Generic Instrument Description
Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)


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Deployments

FK160115

Website
Platform
R/V Falkor
Start Date
2016-01-16
End Date
2016-02-11
Description
Project: Using Proteomics to Understand Oxygen Minimum Zones (ProteOMZ) More information is available from the ship operator at https://schmidtocean.org/cruise/investigating-life-without-oxygen-in-the... Additional cruis information is available from the Rolling Deck to Repository (R2R): https://www.rvdata.us/search/cruise/FK160115


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Project Information

The ProteOMZ Expedition: Investigating Life Without Oxygen in the Pacific Ocean (ProteOMZ (Proteomics in an Oxygen Minimum Zone))


Coverage: Central Pacific Ocean (Hawaii to Tahiti)


From Schmidt Ocean Institute's ProteOMZ Project page:

Rising temperatures, ocean acidification, and overfishing have now gained widespread notoriety as human-caused phenomena that are changing our seas. In recent years, scientists have increasingly recognized that there is yet another ingredient in that deleterious mix: a process called deoxygenation that results in less oxygen available in our seas.

Large-scale ocean circulation naturally results in low-oxygen areas of the ocean called oxygen deficient zones (ODZs). The cycling of carbon and nutrients – the foundation of marine life, called biogeochemistry – is fundamentally different in ODZs than in oxygen-rich areas. Because researchers think deoxygenation will greatly expand the total area of ODZs over the next 100 years, studying how these areas function now is important in predicting and understanding the oceans of the future. This first expedition of 2016 led by Dr. Mak Saito from the Woods Hole Oceanographic Institution (WHOI) along with scientists from University of Maryland Center for Environmental Science, University of California Santa Cruz, and University of Washington aimed to do just that, investigate ODZs.

During the 28 day voyage named “ProteOMZ,” researchers aboard R/V Falkor traveled from Honolulu, Hawaii to Tahiti to describe the biogeochemical processes that occur within this particular swath of the ocean’s ODZs. By doing so, they contributed to our greater understanding of ODZs, gathered a database of baseline measurements to which future measurements can be compared, and established a new methodology that could be used in future research on these expanding ODZs.



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