Nutrients and pigments from HPLC analysis for fire ash deposition to coastal ocean study, southern California, December 2017

Website: https://www.bco-dmo.org/dataset/765868
Data Type: Cruise Results
Version: 1
Version Date: 2019-04-22

Project
» RAPID: Biogeochemical effects of fire ash deposition to the coastal ocean, in response to the 2017 Southern California fires (FADCO)
ContributorsAffiliationRole
Valentine, David L.University of California-Santa Barbara (UCSB)Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Nutrients and pigments from HPLC analysis for fire ash deposition to coastal ocean study, southern California, December 2017.


Coverage

Spatial Extent: N:34.367 E:-117.734 S:32.867 W:-120.072
Temporal Extent: 2017-12-16 - 2017-12-22

Dataset Description

Nutrients and pigments from HPLC analysis for fire ash deposition to coastal ocean study, southern California, December 2017.


Methods & Sampling

POC: 500 mL seawater was filtered from depths above 100 m. One L seawater was filtered for depths below 100 m. All seawater samples were filtered gently via vacuum (<10 mm Hg) through 25 mm (0.7 µm) Whatman GF/F filters that were precombusted at 450˚C for 4 hours. Filters were folded in quarters and stored in pre-combusted (450˚C for 4 h) glass scintillation vials. Samples were stored at -20˚C until analysis at the UC Santa Barbara Marine Science Institute Analytical Lab on an Automated Organic Elemental Analyzer following the Dumas combustion method.

Nutrients: 40 mL of seawater was directly filtered from the Niskin bottle through a 0.8 µm polycarbonate filter housed in a 47 mm polycarbonate filter holder into a sterile 50 mL conical centrifuge tube. Samples were stored at -20˚C until analysis at the UC Santa Barbara Marine Science Institute Analytical Lab via flow-injection analysis on a QuickChem 8500 Series 2.

HPLC: Approximately 2 L seawater was filtered through 25 mm (0.7 µm) Whatman GF/F filters. Filters were folded in half, stored in foil packets, and put immediately in liquid nitrogen, where they were kept through shipment to and until analysis at NASA Goddard Space Flight Center. HPLC pigments were analyzed by Crystal Thomas following Van Heukelem and Thomas (2001): https://oceancolor.gsfc.nasa.gov/fsg/hplc/

Quality flags reflect those used by the World Ocean Circulation Experiment (WOCE):
1: sample taken
2: acceptable measurement
3. questionable measurement
4. bad measurement
5. not reported
9. no sample drawn


Data Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date

 


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Data Files

File
FADCO_nuts_hplc.csv
(Comma Separated Values (.csv), 231.45 KB)
MD5:8f9f151d55ddfada034696e6a7cdb02f
Primary data file for dataset ID 765868

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Parameters

ParameterDescriptionUnits
CruiseCruise Number unitless
StationStation Number unitless
Time_StampDate & Time formatted as yyyy-mm-ddThh:mm unitless
Latitudelatitude; north is positive decimal degrees
Longitudelongitude; east is positive decimal degrees
Bottom_ZBottom Depth meters
CruiseCNCruise Cast Number unitless
NiskinNiskin Bottle Number unitless
Target_ZNiskin Target Depth meters
Conductivityconductivity from sensor S/m
BeamAtBeam Attenuation from sensor 1/m
BeamTpercent Beam Transmission from sensor unitless
Density00Density from sensor kg m3
ZDepth from sensor meters
Fluorescencefluorescence from sensor mg m-3
OxygenOxygen from sensor ml L-1
ParPhotosynthetically Available Radiation umol photons m-2 s-1
Salinitysalinity psu
Temperaturetemperature degrees C
Pressurepressure db
Neutral_Densityneutral density kg m3
Sigma_Thetapotential density kg m3
Potential_Temppotential temperature degrees C
PO4Phosphate umol P L-1
PO4_QFPhosphate Quality Flag unitless
SiO4Silicate umol Si L-1
SiO4_QFSilicate Quality Flag unitless
NO2Nitrite umol N L-1
NO2_QFNitrite Quality Flag unitless
NO2_NO3Nitrite + Nitrate umol N L-1
NO2_NO3_QFNitrite + Nitrate Quality Flag unitless
NH4Ammonia umol N L-1
NH4_QFAmmonia Quality Flag unitless
POCParticulate Organic Carbon ug L-1
POC_QFParticulate Organic Carbon Quality Flag unitless
PONParticulate Organic Nitrogen ug L-1
PON_QFParticulate Organic Nitrogen Quality Flag unitless
TChl_aChlorophyll a from HPLC mg m-3
TChl_bChlorophyll b from HPLC mg m-3
TChl_cChlorophyll c from HPLC mg m-3
Alpha_beta_CarAlpha beta carotene from HPLC mg m-3
But_fuco19'-Butanoyloxyfucoxanthin from HPLC mg m-3
Hex_fuco19'-hexanoyloxyfucoxanthin from HPLC mg m-3
AlloAlloxanthin from HPLC mg m-3
DiadinoDiadinoxanthin from HPLC mg m-3
DiatoDiatoxanthin from HPLC mg m-3
FucoFucoxanthin from HPLC mg m-3
PeridPeridinin from HPLC mg m-3
ZeaZeaxanthin from HPLC mg m-3
MV_Chl_aMonovinyl Chlorphyll a from HPLC mg m-3
DV_Chl_aDivinyl Chlorophyll a from HPLC mg m-3
Chlide_aChlorophyllide from HPLC mg m-3
MV_Chl_bMonovinyl Chlorophyll b from HPLC mg m-3
DV_Chl_bDivinyl Chlorophyll b from HPLC mg m-3
Chl_c2Chlorophyll C2 from HPLC mg m-3
Chl_c3Chlorophyll C3 from HPLC mg m-3
LutLutein [ug/L] mg m-3
NeoNeoxanthin from HPLC mg m-3
ViolaViolaxanthin from HPLC mg m-3
Phytin_aTotal pheophytin a from HPLC mg m-3
Phide_aTotal pheophorbide a from HPLC mg m-3
PrasPrasinoxanthin from HPLC mg m-3


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Instruments

Dataset-specific Instrument Name
Generic Instrument Name
Niskin bottle
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Dataset-specific Instrument Name
Generic Instrument Name
CTD Sea-Bird SBE 911plus
Generic Instrument Description
The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics


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Deployments

SR1718

Website
Platform
R/V Sally Ride
Start Date
2017-12-16
End Date
2017-12-22
Description
Sampling for project ACIDD: Across the Channel: Investigating Diel


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Project Information

RAPID: Biogeochemical effects of fire ash deposition to the coastal ocean, in response to the 2017 Southern California fires (FADCO)

Coverage: Santa Barbara Channel


NSF Award Abstract:

Massive wildfires in coastal regions cause ash to fall into the ocean, with unknown impacts. Ash contains chemical elements and materials that can encourage the growth of microscopic organisms in the surface ocean. The Thomas Fire has burned over 240,000 acres in southern California since Dec 4, 2017. The winds have carried a plume of smoke, ash and soot more than 1000 km over the Santa Barbara Channel. The intellectual merit of this RAPID project focuses on the impact of fire ash supply to coastal ocean ecosystems, by studying the 2017 Thomas Fire. This is achieved through a combination of experiments and environmental measurements, including an oceanographic expedition to the affected area aboard the R/V Sally Ride. The broader impacts of this award include the shipboard training of more than twelve graduate students as well as providing insight as to effects of the Thomas Fire on the coastal ocean.

Massive wildfires can couple terrestrial ecosystems to coastal ocean ecosystems through depositional and runoff processes. The Thomas Fire, which began on Dec 4, 2017, has burned over 240,000 acres and the persistent offshore winds created a plume of smoke, ash and soot that extended over 1000 km off shore. This unfortunate circumstance provides an opportunity to investigate the impact of ash deposition on the coastal ocean. This research entails a series of incubation experiments and measurements designed to assess the impact of fire ash deposition on the biogeochemistry of the coastal ocean. Specifically, the research tests the hypothesis that the deposition of wildfire-derived particulate matter to the coastal ocean impacts the planktonic communities of the upper water column, providing nutrients that facilitate blooms of phytoplankton, leaching dissolved organic carbon to surface waters that feeds heterotrophic bacterial populations, and serving as a source of sinking particulate matter that feeds heterotrophic bacterial populations deeper in the water column. These hypotheses are tested through a series of experiments at sea and in the home laboratories, and through shipboard measurements and analysis of samples collected from impacted waters.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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