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Data server object:  MUSiCC_CTD_data




  
    CTD data from collected from the R/V Oceanus OC1504A along the Oregon/California Coastal Upwelling Zone, between 34-44N and 120-124W during 2015
    
  
  
    
    

CTD data from collected from the R/V Oceanus OC1504A along the Oregon/California Coastal Upwelling Zone, between 34-44N and 120-124W during 2015

Website: https://www.bco-dmo.org/dataset/652162
Data Type: Cruise Results
Version: 1
Version Date: 2016-07-18

Project
» Linking physiological and molecular aspects of diatom silicification in field populations (Diatom Silicification)
ContributorsAffiliationRole
Thamatrakoln, KimberleeRutgers University (Rutgers IMCS)Principal Investigator, Contact
Brzezinski, Mark A.University of California-Santa Barbara (UCSB-LifeSci)Co-Principal Investigator
Ake, HannahWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
CTD data from collected from the R/V Oceanus OC1504A along the Oregon/California Coastal Upwelling Zone, between 34-44N and 120-124W during 2015


Coverage

Spatial Extent: N:43.65434 E:-120.81017 S:34.551 W:-124.48169
Temporal Extent: 2015-04-20 - 2015-05-01

Dataset Description

These are processed CTD data from the OCE1504A cruise, Molecular Underpinnings of Silicification in the California Current (MUSiCC), including fluorometry and dissolved O2.


Acquisition Description

Data were collected using a CTD fitted with a variety of sensors. See the event log for more details: DOI: 10.1575/1912/bco-dmo.651685.1


Processing Description

DMO notes:
BCO-DMO made the following modifications to the data display:
-Edited column names to meet BCO-DMO standards
-Added ISO date time column
-Added lat/lon coordinates using those found in the event log


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Parameters

ParameterDescriptionUnits
cruisecruise name given to OC150A unitless
CTDCTD cast id unitless
latlatitude decimal degrees
lonlongitude decimal degrees
bottlebottle number unitless
datedate of cast; mm-bbb-yy unitless
timetime of cast; HH:MM:SS unitless
depthdepth of cast meters
presspressure in decibars decibars
temp0temperature in degrees C from sensor 1 celsius
temp1temperature in degrees C from sensor 2 celsius
cond0conductivity from sensor 1 siemens per meter
cond1conductivity from sensor 2 siemens per meter
sal00salinity from sensor 1 PSU
sal11salinity from sensor 2 PSU
sigma_theta00sigma theta density from sensor 1 kilograms per meter cubed
sigma_theta11sigma theta density from sensor 2 kilograms per meter cubed
fluorfluorescence milligrams per meter cubed
translight transmission as percent dimensionless
beam_cbeam attenuation (loss of light) 1/meters
O2_umol_kgdissolved oxygen micromoles per kilogram
PARphotosynthetically available radiation microEinsteins per meter squared per second
ISO_DateTime_UTCDateTime (UTC) ISO formatted unitless

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Deployments

OC1504A

Website
Platform
R/V Oceanus
Report
Start Date
2015-04-19
End Date
2015-05-02
Description
Data for the project "Linking physiological and molecular aspects of diatom silicification in field populations" (PIs Kimberlee Thamatrakoln and Mark Brzezinski) were collected on this cruise.


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Project Information

Linking physiological and molecular aspects of diatom silicification in field populations (Diatom Silicification)

Coverage: Oregon/California Coastal Upwelling Zone, between 34-44N and 120-124W


Description from NSF award abstract: Diatoms, unicellular, eukaryotic photoautotrophs, are among the most ecologically successful and functionally diverse organisms in the ocean. In addition to contributing one-fifth of total global primary productivity, diatoms are also the largest group of silicifying organisms in the ocean. Thus, diatoms form a critical link between the carbon and silicon (Si) cycles. The goal of this project is to understand the molecular regulation of silicification processes in natural diatom populations to better understand the processes controlling diatom productivity in the sea. Through culture studies and two research cruises, this research will couple classical measurements of silicon uptake and silica production with molecular and biochemical analyses of Silicification-Related Gene (SiRG) and protein expression. The proposed cruise track off the West Coast of the US will target gradients in Si and iron (Fe) concentrations with the following goals: 1) Characterize the expression pattern of SiRGs, 2) Correlate SiRG expression patterns to Si concentrations, silicon uptake kinetics, and silica production rates, 3) Develop a method to normalize uptake kinetics and silica production to SiRG expression levels as a more accurate measure of diatom activity and growth, 4) Characterize the diel periodicity of silica production and SiRG expression. It is estimated that diatoms process 240 Teramoles of biogenic silica each year and that each molecule of silicon is cycled through a diatom 39 times before being exported to the deep ocean. Decades of oceanographic and field research have provided detailed insight into the dynamics of silicon uptake and silica production in natural populations, but a molecular understanding of the factors that influence silicification processes is required for further understanding the regulation of silicon and carbon fluxes in the ocean. Characterizing the genetic potential for silicification will provide new information on the factors that regulate the distribution of diatoms and influence in situ rates of silicon uptake and silica production. This research is expected to provide significant information about the molecular regulation of silicification in natural populations and the physiological basis of Si limitation in the sea.


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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database.    2020-02-23  12:44:00