Station locations from fishing vessels in the Southern California Bight off Huntington Beach in 2012 (SoCalPlumeEx2012 project)

Website: https://www.bco-dmo.org/dataset/537502
Version: 04 November 2014
Version Date: 2014-11-04

Project
» Assessing the Ecophysiological and Biogeochemical Response to Deliberate Nutrient Loading in the Southern California Bight (SoCalPlumeEx2012)
ContributorsAffiliationRole
Kudela, Raphael M.University of California-Santa Cruz (UCSC)Principal Investigator, Contact
Lucas, Andrew JUniversity of California-San Diego (UCSD-SIO)Co-Principal Investigator
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Stations occupied during SoCalPlumeEx2012
 


Methods & Sampling

Generated form individual data files submitted by Ralphael Kudela


Data Processing Description

Generated form individual data files submitted by Ralphael Kudela


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Data Files

File
Stations.csv
(Comma Separated Values (.csv), 2.77 KB)
MD5:f30da7b54e542f21ff03238988876a03
Primary data file for dataset ID 537502

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Parameters

ParameterDescriptionUnits
DatasetDataSet text
Station_IDStation Id text
DateDate (GMT) YYYYMMDD
LatitudeLatitude Position (South is negative) decimal degrees
LongitudeLongitude Position (West is negative) decimal degrees

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Deployments

SoCalPlumeEx2012

Website
Platform
Fishing Vessels
Start Date
2012-09-06
End Date
2012-10-17
Description
Multiple vessels used for this effort. R/V Yellowfin R/V Nerissa


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Project Information

Assessing the Ecophysiological and Biogeochemical Response to Deliberate Nutrient Loading in the Southern California Bight (SoCalPlumeEx2012)


Coverage: Southern California Bight [33-33.75° N, 117.25-118.5° W]


In autumn 2012, Orange County Sanitation District (OCSD) will divert ~150 million gallons/day of secondarily-treated effluent to a nearshore (1 mile offshore) outfall pipe over a period of ~4 weeks. No discharges of this magnitude have been conducted in decades. The planned diversion is expected to create a buoyant surface plume that will spread over much of the coastal region. Because OCSD plans to "super-chlorinate" and then dechlorinate the discharge, the effect of the plume should be predominantly a nutrient addition rather than direct addition of intact microbial populations. The PIs propose to address two broad questions through a study of the plume:

First, what happens ecologically and physiologically to the phytoplankton assemblage when nutrients are discharged in the surface ocean for extended periods of time?
Second, can this dynamic and shifting environment be sampled by deploying multiple technologies to identify the physical/chemical drivers of the biological response at ecologically relevant space and time scales?

They will test two hypotheses:
H1: Continual discharge of nutrients to the surface ocean results in a dinoflagellate-dominated bloom which leads to dampening or cessation of vertical migration of the dinoflagellates and drives a shift to net heterotrophy.
H2: The bloom will initially result in a strong local sink for carbon dioxide which gradually develops into a strong source as heterotrophy develops.

The study is expected to provide a time-evolving picture of interactions within and between autotrophic and heterotrophic communities and will illustrate the short-term biogeochemical and ecological consequences of sustained nutrient discharge to a shallow coastal site. The planned diversion provides an unprecedented opportunity to study the ecophysiological response in a natural setting over a period of weeks, including the interaction of biology, chemistry, and physics, and it will contribute to basic understanding of anthropogenic nutrient loading to the coastal ocean. Undergraduate and graduate education and training will be furthered through active participation in lab, field, and data synthesis activities involving academic, government, and industry partners.

Affiliated Programs or Projects:
- NOAA ECOHAB Project (NA11NOS4780030): A Regional Comparison of Upwelling and Coastal Land Use Patterns on the Development of HAB Hotspots Along the California Coast
- Southern California Coastal Ocean Observing System
- Central and Northern California Coastal Ocean Observing System



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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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