Observations from Working with a Simple Mathematical Model of Light Absorption by Small Particles in the Ocean PDF Download
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Author: Derric G. Tay
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
In order to investigate the possibility of using oceanic visual spectrum data (i.e., ocean color) to differentiate between phytoplankton cell types, a simple mathematical model of light absorption was constructed in MATLAB, in order to investigate the effects of depth, cell size, and water on light absorption by a layer of water containing suspended particles. The model takes chlorophyll a absorption data, cell diameter, intracellular and bulk concentrations of chlorophyll a, pure water absorption data, and thickness of water layer as inputs, and outputs the attenuation by absorption of light that shines through a layer of water containing suspended, absorbing cells. Plots of absorptive attenuation were made, varying thickness, cell diameter, and inclusion of water absorption. These plots were qualitatively analyzed. It was found that water greatly dominates absorption, when included. This finding suggests that using visual data may be difficult with ocean water, though scattering effects remain to be accounted for, and thus this problem warrants further study.
Author: Derric G. Tay
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
In order to investigate the possibility of using oceanic visual spectrum data (i.e., ocean color) to differentiate between phytoplankton cell types, a simple mathematical model of light absorption was constructed in MATLAB, in order to investigate the effects of depth, cell size, and water on light absorption by a layer of water containing suspended particles. The model takes chlorophyll a absorption data, cell diameter, intracellular and bulk concentrations of chlorophyll a, pure water absorption data, and thickness of water layer as inputs, and outputs the attenuation by absorption of light that shines through a layer of water containing suspended, absorbing cells. Plots of absorptive attenuation were made, varying thickness, cell diameter, and inclusion of water absorption. These plots were qualitatively analyzed. It was found that water greatly dominates absorption, when included. This finding suggests that using visual data may be difficult with ocean water, though scattering effects remain to be accounted for, and thus this problem warrants further study.
Author: Bogdian Wozniak
Publisher: Springer Science & Business Media
ISBN: 0387495606
Category : Science
Languages : en
Pages : 463
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Book Description
This book provides a detailed description of light absorption and absorbents in seawaters with respect to provenance, region of the sea, depth of the occurrence and trophicity. The text is based on a substantial body of contemporary research results taken from the subject literature (over 400 references) and the work of the authors over a period of 30 years.
Author: Miroslaw Jonasz
Publisher: Elsevier
ISBN: 0080548679
Category : Science
Languages : en
Pages : 715
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Book Description
Light scattering-based methods are used to characterize small particles suspended in water in a wide range of disciplines ranging from oceanography, through medicine, to industry. The scope and accuracy of these methods steadily increases with the progress in light scattering research. This book focuses on the theoretical and experimental foundations of the study and modeling of light scattering by particles in water and critically evaluates the key constraints of light scattering models. It begins with a brief review of the relevant theoretical fundamentals of the interaction of light with condensed matter, followed by an extended discussion of the basic optical properties of pure water and seawater and the physical principles that explain them. The book continues with a discussion of key optical features of the pure water/seawater and the most common components of natural waters. In order to clarify and put in focus some of the basic physical principles and most important features of the experimental data on light scattering by particles in water, the authors employ simple models. The book concludes with extensive critical reviews of the experimental constraints of light scattering models: results of measurements of light scattering and of the key properties of the particles: size distribution, refractive index (composition), structure, and shape. These reviews guide the reader through literature scattered among more than 210 scientific journals and periodicals which represent a wide range of disciplines. A special emphasis is put on the methods of measuring both light scattering and the relevant properties of the particles, because principles of these methods may affect interpretation and applicability of the results. The book includes extensive guides to literature on light scattering data and instrumentation design, as well as on the data for size distributions, refractive indices, and shapes typical of particles in natural waters. It also features a comprehensive index, numerous cross-references, and a reference list with over 1370 entries. An errata sheet for this work can be found at: http://www.tpdsci.com/Ref/Jonasz_M_2007_LightScatE.php *Extensive reference section provides handy compilations of knowledge on the designs of light scattering meters, sources of experimental data, and more *Worked exercises and examples throughout
Author: Michael I. Mishchenko
Publisher: Cambridge University Press
ISBN: 9780521782524
Category : Science
Languages : en
Pages : 562
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Book Description
A thorough and up-to-date treatment of electromagnetic scattering by small particles.
Author: K.S. Shifrin
Publisher: Springer Science & Business Media
ISBN: 9780883185292
Category : Science
Languages : en
Pages : 308
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
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Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author: Bogdian Wozniak
Publisher: Springer
ISBN: 9780387307534
Category : Science
Languages : en
Pages : 0
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Book Description
This book provides a detailed description of light absorption and absorbents in seawaters with respect to provenance, region of the sea, depth of the occurrence and trophicity. The text is based on a substantial body of contemporary research results taken from the subject literature (over 400 references) and the work of the authors over a period of 30 years.
Author: Joan S. Cleveland
Publisher:
ISBN:
Category : Chlorophyll
Languages : en
Pages : 214
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Book Description
Author: Dale A. Kiefer
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Book Description
Our long term goal is to understand the biological and optical properties of the planktonic community of the open ocean and to derive mathematical descriptions of this community. We pursue our research goal largely by analyzing bio-optical signals measured in the field and by comparing these signals with the predictions of mathematical models. During this work we developed a macrophotometric technique for measuring the absorption of light by suspended microparticles in sea water. We also developed in collaboration with R. Iturriaga a technique for measuring the absorption efficiency factor for individuals cells. During the 4 Biowatt cruises in 1987, we made over 500 measurements of the spectral absorption coefficient of suspended microparticles and developed a statistical technique for determining the contribution by phytoplankton to this coefficient. In addition, we completed a microphotometric analysis of spectral light absorption efficiency by individual particles collected during the Biowatt I cruise. In 1988 we continued our analysis of variability in the spectral absorption coefficient of microparticles in the western Sargasso Sea. (jes).
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 692
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Book Description
