http://lod.bco-dmo.org/id/dataset/766421
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2019-05-07
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Hydrosol optical properties refractive index physical quantities
2019-05-07
publication
2019-05-07
revision
BCO-DMO Linked Data URI
2019-05-07
creation
http://lod.bco-dmo.org/id/dataset/766421
Ping Yang
Texas A&M University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Yang, P. (2019) Hydrosol optical properties refractive index physical quantities. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2019-05-07 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/766421 [access date]
Hydrosol optical properties refractive index physical quantities Dataset Description: <p>The hydrosol dataset is a look up table for the single scattering properties of hydrosol.&nbsp;It covers the range of refractive indices and sizes of natural hydrosol.</p> Methods and Sampling: <p>The invariant-imbedding T-matrix mathod(IITM)[1] is used to compute particles&nbsp;with equivalent volume sphere radius from 0.001~2.0 um. The physical geometric optics method(PGOM)[2] is used to compute particles&nbsp;with equivalent volume sphere radius from 2.1~300.0 um. The particle geometry is generated with the "irregular hexahedral ensemble" method[3].&nbsp;Single scattering properties of a single particle is obtained by averaging&nbsp;a 20-irregular-hexahedron ensemble.&nbsp;</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1459180 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1459180
onGoing
Ping Yang
Texas A&M University
979-845-7679
Department of Atmospheric Sciences O&M Building, Room 1204GA
College Station
TX
77843
USA
pyang@tamu.edu
pointOfContact
asNeeded
Unknown
wavelength
eq_vol_sphere_rad
part_vol
part_proj_area
ext_efficiency
single_scatt_albedo
asymetry_factor
filename
theme
None, User defined
wavelength
length
volume
No BCO-DMO term
file_name
featureType
BCO-DMO Standard Parameters
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Inferring Marine Particle Properties from Polarized Volume Scattering Functions
https://osprey.bco-dmo.org/project/754001
Collaborative Research: Inferring Marine Particle Properties from Polarized Volume Scattering Functions
<p>NSF Award Abstract:</p>
<p>Understanding biogeochemical cycles and their interaction with the climate system requires quantifying the various forms of materials in the global ocean. In particular, the chemical composition and size distribution of living and non-living particles in the ocean have an enormous impact on marine ecosystems, including the dynamics of marine food chains, the vertical transmission of solar energy, and the transport of organic matter and trace elements. These particle characteristics not only affect but reflect changes in many biogeochemical processes in the ocean. In this project, a team of scientists will launch a set of technical and numerical modeling innovations that will allow them to determine key biogeochemical quantities from optical observations of the angular distribution of scattered light. The project will involve an interdisciplinary team of experts, who will theoretically model the optics of marine particles, develop an innovative advanced mathematical modeling scheme, and then laboratory- and field-test and validate the approach for observing marine particle properties.</p>
<p>When perfected, the technique should see a broader application, as it will be designed to be amenable to operation on ship-borne and autonomous platforms with the potential to provide estimates of the particle size distribution and composition at high temporal and spatial resolutions. It should thus benefit different fields requiring detailed knowledge of aquatic particles (biogeochemistry, biology, optics). The project will also provide for the training and support of graduate and undergraduate students as well as public educational outreach, including a special effort to reach Native Americans in North Dakota.</p>
<p>The goal of this project is to derive water-column quantitative particle size and composition information from in situ unobtrusive volume scattering function (VSF) measurements to characterize marine biogeochemical particulate stocks. The angular patterns of the scattered intensity and polarization state of the scattered light by particles can be described in terms of a 4x4 Mueller matrix (S) that is intrinsically determined by the sizes, shapes, composition, and structures of the particles. The particle properties can be, therefore, potentially inferred from measurements of S. Unfortunately, the complete Mueller matrix of oceanic waters has been seldom measured. Even the most commonly measured component, the volume scattering function (element S11) representing the angular distribution of unpolarized light, was scarcely measured until recently, followed by development of an inversion technique to derive size distributions and composition of particles from the VSF. Recently, a commercial product, LISST-VSF, became available for measuring the Mueller matrix components S11 (VSF), S12 (linear polarization), and S22 (cross-polarization), potentially providing an avenue to obtain a much more detailed characterization of particles. This project will incorporate the additional information provided by S12 and S22 using recent advances in scattering modeling to further constrain the inversion with the following: (i) better knowledge in particle shapes using S22 (spherical vs. non-spherical); (ii) reduced uncertainty using both S11 and S12; and (iii) further improved capability to characterize particles in the size range of 0.02 to 200 um. The study should greatly enhance our ability to quantify size distributions and refractive indices (closely linked to particle densities) for particle groups such as phytoplankton cells, detrital particles, organic particles, mineral particles, bubbles, and emulsified oil (if present).</p>
Marine Particle Optics
largerWorkCitation
project
eng; USA
oceans
2019-05-07
0
BCO-DMO catalogue of parameters from Hydrosol optical properties refractive index physical quantities
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/766440.rdf
Name: wavelength
Units: micometers (um)
Description: <p>wavelength</p>
http://lod.bco-dmo.org/id/dataset-parameter/766441.rdf
Name: eq_vol_sphere_rad
Units: micrometers (um)
Description: <p>equivalent volume sphere radius (107 sizes in [0.001;300])</p>
http://lod.bco-dmo.org/id/dataset-parameter/766442.rdf
Name: part_vol
Units: micometers cubed (um^3)
Description: <p>particle volume</p>
http://lod.bco-dmo.org/id/dataset-parameter/766443.rdf
Name: part_proj_area
Units: micometers squared (um^2)
Description: <p>particle projected area</p>
http://lod.bco-dmo.org/id/dataset-parameter/766444.rdf
Name: ext_efficiency
Units: unitless
Description: <p>extinction efficiency</p>
http://lod.bco-dmo.org/id/dataset-parameter/766445.rdf
Name: single_scatt_albedo
Units: unitless
Description: <p>single scattering albedo</p>
http://lod.bco-dmo.org/id/dataset-parameter/766446.rdf
Name: asymetry_factor
Units: unitless
Description: <p>asymmetry factor</p>
http://lod.bco-dmo.org/id/dataset-parameter/766447.rdf
Name: filename
Units: unitless
Description: <p>filename of the file where the data was extracted</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
https://osprey.bco-dmo.org/dataset/766421/data/download
download
onLine
dataset
<p>The invariant-imbedding T-matrix mathod(IITM)[1] is used to compute particles&nbsp;with equivalent volume sphere radius from 0.001~2.0 um. The physical geometric optics method(PGOM)[2] is used to compute particles&nbsp;with equivalent volume sphere radius from 2.1~300.0 um. The particle geometry is generated with the "irregular hexahedral ensemble" method[3].&nbsp;Single scattering properties of a single particle is obtained by averaging&nbsp;a 20-irregular-hexahedron ensemble.&nbsp;</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO Processing Notes:<br />
- combined all isca.dat files<br />
- created a column for file name from which the data was gathered<br />
-&nbsp;added conventional header with dataset name, PI name, version date<br />
- modified parameter names to conform with BCO-DMO naming conventions<br />
- sorted data by filename and&nbsp;eq_vol_sphere_rad columns</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact