Search Results - "Weidemann, Alan D"

Why does the Secchi disk disappear? An imaging perspective by Hou, Weilin, Lee, Zhongping, Weidemann, Alan D

“…The widely-used Secchi disk method is re-examined from the modulation transfer aspect. Namely, by assuming a volume scattering function and applying small…”
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Comparison and validation of point spread models for imaging in natural waters by Hou, Weilin, Gray, Deric J, Weidemann, Alan D, Arnone, Robert A

“…It is known that scattering by particulates within natural waters is the main cause of the blur in underwater images. Underwater images can be better restored…”
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In Situ Phytoplankton Analysis: There’s Plenty of Room at the Bottom by Erickson, Jeffrey S, Hashemi, Nastaran, Sullivan, James M, Weidemann, Alan D, Ligler, Frances S

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Characterizations of Minerogenic Particles in Support of Modeling Light Scattering in Lake Superior through a Two-Component Approach by Peng, Feng, Effler, Steve W., O'Donnell, David, Weidemann, Alan D., Auer, Martin T.

“…The role of suspended minerogenic particles in light scattering in eastern Lake Superior and Keweenaw Bay (11 sites) during July of 2006 was evaluated with an…”
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Light-Absorbing Components in Lake Superior by Effler, Steven W., Perkins, MaryGail, Peng, Feng, Strait, Christopher, Weidemann, Alan D., Auer, Martin T.

“…Features of light absorption are critical to optical aspects of water quality and in regulating the signal available for remote sensing. Spectral…”
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Observations and Measurements of Planktonic Bioluminescence off the South Coast and Puttalam Lagoon of Sri Lanka by Wimalasiri, Hewa Bhashithage Udeshika Gangani Manike, Jinadasa, Sinhalage Udaya Priyantha, Dissanayake, Dadigamuwage Chamari Tathsaramala, Wijesekara, Hemantha W., Weidemann, Alan D.

“…Marine bioluminescence is a unique phenomenon and widely studied around the world. However, information on bioluminescence is scarce in the Indian ocean. This…”
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Phytoplankton spectral absorption as influenced by community size structure and pigment composition by Lohrenz, Steven E., Weidemann, Alan D., Tuel, Merritt

“…Assessments were made of the relative importance of package effects and pigment composition in contributing to variations in spectral absorption in shelf…”
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Photosynthesis–irradiance parameters and community structure associated with coastal filaments and adjacent waters in the northern Arabian Sea by Toon, Rory K, Lohrenz, Steven E, Rathbun, Catherine E, Michelle Wood, A, Arnone, Robert A, Jones, Burton H, Kindle, John C, Weidemann, Alan D

“…Comparisons were made among size-fractionated photosynthesis-irradiance ( P- E) parameters, chlorophyll a size distributions, and accessory pigment composition…”
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Shape Factors, Two-Flow Models, and the Problem of Irradiance Inversion in Estimating Optical Parameters by Stavn, Robert H., Weidemann, Alan D.

“…The problem of the inversion of irradiance measurements for the inherent optical properties of a hydrosol such as the world ocean has been examined with the…”
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Integrating Cavity Absorption Meter measurements of dissolved substances and suspended particles in ocean water by Pope, Robin M., Weidemann, Alan D., Fry, Edward S.

“…We have developed a new device to measure the separate contributions to the spectral absorption coefficient due to a pure liquid, due to the particles…”
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In Situ Phytoplankton Analysis: There's Plenty of Room at the Bottom : FUNDAMENTAL AND APPLIED REVIEWS IN ANALYTICAL CHEMISTRY by ERICKSON, Jeffrey S, HASHEMI, Nastaran, SULLIVAN, James M, WEIDEMANN, Alan D, LIGLER, Frances S

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Particulate and optical properties during CaCO3 precipitation in Otisco Lake1 by Weidemann, Alan D., Bannister, T. T., Effler, Steven W., Johnson, David L.

“…In late June 1983, Secchi depth d was 3.5 m and the vertical attenuation coefficient K was ≤ 0.5 m−1 in Otisco Lake. By 2 August, near the peak of a “whiting,”…”
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A tool for rapid configuration of a river model by Blain, Cheryl Ann, Linzell, Robert S., Weidemann, Alan D., Lyon, Paul E.

“…A tool has been developed, the River Simulation Tool (RST), that allows the configuration of a two-dimensional hydrodynamic river model based on…”
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Automated underwater image restoration and retrieval of related optical properties by Weilin Hou, Gray, D.J., Weidemann, A.D., Fournier, G.R., Forand, J.L.

“…The presented effort is aimed at establishing a framework in order to restore underwater imagery to the best possible level, working with both simulated and…”
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A tidal plume front and internal solitons by Johnson, Donald R., Weidemann, Alan D.

“…A tidal plume front (internal tidal bore) propagating from the Apalachicola Bay outflow into the northern Gulf of Mexico is examined in a brief set of…”
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Light scattering phase functions of turbid coastal waters measured in LEO-15 experiment in 2000 by Lee, M.E., Haltrin, V.I., Shybanov, E.B., Weidemann, A.D.

“…We propose additional 60 new experimental phase functions of light scattering by natural seawater measured in the very turbid waters of the Atlantic during the…”
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Particulate and optical properties during CaCO3 precipitation in Otisco lake by Weidemann, AD, Bannister, T T, Effler, S W, Johnson, D J

“…Otisco lake was subject to ''whitings' due to the precipitation of calcium carbonate. Samples were analysed for inorganic particulate concentration, size, and…”
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Particulate and optical properties during CaCO sub(3) precipitation in Otisco Lake 1 by Weidemann, Alan D, Bannister, T T, Effler, Steven W, Johnson, David L

“…In late June 1983, Secchi depth d was 3.5 m and the vertical attenuation coefficient K was less than or equal to 0.5 m super(-1) in Otisco Lake. By 2 August,…”
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Particulate and Optical Properties During $CaCO_3$ Precipitation in Otisco Lake by Weidemann, Alan D., Bannister, T. T., Effler, Steven W., Johnson, David L.

“…In late June 1983, Secchi depth d was 3.5 m and the vertical attenuation coefficient $K was \leg\le 0.5 m^-1$ in Otisco Lake. By 2 August, near the peak of a…”
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Particulate and optical properties during CaCO 3 precipitation in Otisco Lake1 by Weidemann, Alan D., Bannister, T. T., Effler, Steven W., Johnson, David L.

“…In late June 1983, Secchi depth d was 3.5 m and the vertical attenuation coefficient K was ≤ 0.5 m −1 in Otisco Lake. By 2 August, near the peak of a…”
Get full text