rick reynolds and dariusz stramski measurements of iops and characterization of particle assemblages...
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![Page 1: Rick Reynolds and Dariusz Stramski Measurements of IOPs and Characterization of Particle Assemblages for Monterey Bay Experiment Marine Physical Laboratory](https://reader036.vdocuments.net/reader036/viewer/2022062722/56649f295503460f94c435d3/html5/thumbnails/1.jpg)
Rick Reynolds and Dariusz Stramski
Measurements of IOPs and
Characterization of Particle Assemblages
for Monterey Bay Experiment
Marine Physical LaboratoryScripps Institution of OceanographyUniversity of California, San Diego
Fourth Coast Meeting; 28-29 June 2006, Monterey, CA
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Collection of a bio-optical data set for: 1. Development of ocean color algorithms for Particulate Organic Carbon (POC) and Total Suspended Particle Mass (TSPM) concentrations.
2. Ground-truth validation of ocean color products.
Primary objective for experiment
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• Measurement of multi-angle scattering at 532 nm (Dawn-EOS)
• Determination of POC and TSPM concentration
• Particle counting, imaging, and identification on selected samples (FlowCAM)
In situ measurements on the R/V Martin • Vertical profiles of the spectral light scattering and
absorption properties of seawater with a Multisensor Datalogger System (MDS)
• Particle size distribution from inversion of light scattering data
Analysis of discrete water samples
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In situ measurements of IOPs and PSDMultisensor Datalogger System (MDS)
• CTD sensors (SeaBird)
• Two beam transmissometers (C-Star, Wetlabs)
488 and 660 nm
• Backscattering sensor (Hydroscat-6, HobiLabs)
6 wavelengths: 442, 470, 555, 589, 620, and 671 nm
• Two absorption/backscattering sensors (aBeta, HobiLabs)420 and 510 nm
• Forward light scattering (32 angles, 0.1–14°) and beam transmission at 532 nm, Particle Size Distribution 1-200 m (LISST-100X, Sequoia)
Footprint: ~1 m2
Wire time: 10-20 min. per profile
Internal power and data logging
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Water Sample Analyses(Filtrations onboard or shore lab)
• POC and PON (3x500 ml per depth)
• TSPM (≡ TSS)
(3x500 ml per depth)Inorganic and Organic fractions
3 liters per depthSurface, Chl and cp max
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SHORE LABDAWN-EOS Multi-Angle Light Scattering
Volume scattering function at 532 nm18 angles, 22-147°Vertical and horizontal polarizations
Scattering Angle [deg]
0.1 1 10 100
Part
icle
VSF
(532
) [
m-1
sr-
1 ]
10-3
10-2
10-1
100
101
102
103
104
Lisst 100XDawn EOSECO-VSF
Imperial Beach Pier10 May 2006
Footprint: 40x60 cmSample Vol: 20 ml
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FlowCAM analysis of particlesCounting, imaging, and sizing of particles 5-100 mLight scattering, Fluorescence of Chl a and PECollect and store preserved samples (100 ml); Analysis of selected samples back at SIO (e.g. HABs)
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Algorithm Development for POC and TSPM concentration
We will explore the use of different approaches to algorithm development:
• Empirical (Requires POC, TSPM, bb, Rrs)2-step approach (Stramski et al. 1999) Band ratio correlations (Stramska and Stramski 2005)
• Semianalytical and Radiative Transfer Modeling (Constituents => IOPs => Rrs)
Spectral matching and LUT (Reynolds et al. 2001, Mobley et al. 2005)
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Summary of Requirements for Monterey Bay Experiment
• 2 PersonnelR. Reynolds (Ship)V. Wright (Shore)
• R/V MartinA-Frame, 10-20 min. per stationWater samples (3-4 depths, 3 liters per depth)Shuttling of water samples to shore?
• Shore Lab FacilitiesBench space for Dawn-EOS Shared filtration setupDrying oven (60° C)