{ lisst calibration and measurements aya, grace, tom ocean optics summer 2013 final project august 2...
TRANSCRIPT
![Page 1: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/1.jpg)
{
LISST calibration and measurements
Aya, Grace, TomOcean Optics Summer 2013 Final ProjectAugust 2nd, 2013
![Page 2: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/2.jpg)
Calibration Measurements
Lab Cruise Coccolithophore experiment
Instructional Video
Outline
![Page 3: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/3.jpg)
Calibration: Methodology
Calibration relies on agreement between measured and modeled VSF of spherical particles
![Page 4: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/4.jpg)
Calibration: Methodology
Methodology from Slade and Boss 2006, “Calibrated near-forward volume scattering function obtained from the LISST particle sizer”
Measure spherical beads of known size (for our experiment, sizes were 1μm, 20μm, 50μm)
Only use runs in which the relative error of beam c is small
Select data from particular detector rings for different size classes
Exclude the first six rings for 1μm runs Exclude rings 15 to 32 for 20μm runs Exclude rings 11 to 32 for 50μm runs
![Page 5: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/5.jpg)
Calibration: Coefficients
From Slade and Boss 2006Our bead calibration
![Page 6: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/6.jpg)
Calibration: Coefficients
Our bead calibration
Calibration experiments were done with expired beads after using vortex machine on the bottle
Expiration dates: April 2007 for 1.0 micrometerMarch 2012 for 20 micrometerJuly 2007 for 50 micrometer
It still works!
![Page 7: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/7.jpg)
Recall…
Calibration: Coefficients
}Output from LISST data
Obtained by bead calibration
![Page 8: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/8.jpg)
Measurements: from Lab
VSFs for lab measurements
![Page 9: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/9.jpg)
PSD for lab measurements: Volume concentration
![Page 10: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/10.jpg)
Measurements: from Lab
PSD for lab measurements: Number frequency assuming spherical shape
![Page 11: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/11.jpg)
Measurements: Cruise
![Page 12: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/12.jpg)
VSFs for cruise stations
depth = 11m
beta
(m
-1 s
r-1)
beta
(m
-1 s
r-1)
beta
(m
-1 s
r-1)
beta
(m
-1 s
r-1)
angle (radians)
angle (radians)
angle (radians)
angle (radians)
depth = 42m depth = 32m
depth = 22m
![Page 13: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/13.jpg)
Measurements: Cruise
PSDs for cruise stations: volume concentration
![Page 14: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/14.jpg)
PSD for Damariscotta River Station: Number frequency assuming spherical shape
![Page 15: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/15.jpg)
PSD for Ocean Station : Number frequency assuming spherical shape
![Page 16: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/16.jpg)
Investigation of changes in river coccolithophore culture scattering and size distribution pre- and post- acidification
Pre-acidification: pH 9.0 Post-acidification: pH 4.5
Measurements: Coccolithophores
http://ina.tmsoc.org/CODENET/GuideImages/COpleurocs/source/40-15.htm
![Page 17: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/17.jpg)
Measurements: Coccolithophores
Changes in VSFlog-log
linear
![Page 18: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/18.jpg)
Measurements: Coccolithophores
Changes in PSD : volume concentration
Mean: 9μm
Mean: 8μm
![Page 19: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/19.jpg)
Measurements: Coccolithophores
Changes in PSD : number frequency assuming spherical shape
Median: 5.12 μm
Median: 6.14μm
![Page 20: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/20.jpg)
Video
![Page 21: { LISST calibration and measurements Aya, Grace, Tom Ocean Optics Summer 2013 Final Project August 2 nd, 2013](https://reader037.vdocuments.site/reader037/viewer/2022110206/56649f475503460f94c68ee9/html5/thumbnails/21.jpg)
For just the coccolithophore experiment: Barney Balch, Meredith White, Dave
Drapeau at Bigelow for the coccolithophore culture
Emmanuel Boss for the LISST instrument & instruction
Mary Jane Perry for instruction & supplies Nathan Briggs for guidance Larry Mayer for pH paper Ken Voss for transporting the sample
Acknowledgements