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Filtering by: Creator Cross, Tim Remove constraint Creator: Cross, Tim Academic Affiliation College of Oceanic and Atmospheric Sciences Remove constraint Academic Affiliation: College of Oceanic and Atmospheric Sciences Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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Vertical distribution patterns of plankton and their relationship to physical factors over the continental shelf off Oregon

Creator:

Sutor, Malinda

Abstract:

Discrete layers of phytoplankton and zooplankton were observed over the Oregon continental shelf in summer and fall of 2001 and summer 2002 using optical and acoustical technologies and a pump sampling system. Layers of phytoplankton had steep vertical gradients which were associated with gradients in density and local peaks in...

Resource Type:

Dissertation

Full Text:

to the results. My major professor, Tim Cowles, has been a wonderful mentor and has tirelessly
Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Creator:

Gutierrez, Jaime Gomez

Abstract:

I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...

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Dissertation

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-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change in euphausiid
Properties of semitransparent upper-level clouds deduced from multispectral imagery data

Creator:

Lin, Xijian

Abstract:

A multispectral retrieval method is developed on the 100 km regional scale to extract the temperature, particle size, fractional cover and 11-μm emissivity of clouds which may be semitransparent in the infrared based on emitted radiances. The scheme utilizes the nonlinear relationship between emitted radiances when clouds are semitransparent and...

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Dissertation

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the particle size must be sufficiently small that the extinction and absorption cross sections at the
Bio-physical interactions of small pelagic fish schools and zooplankton prey in the California Current System over multiple scales

Creator:

Kaltenberg, Amanda May

Abstract:

Small pelagic fish represent a critical trophic link between plankton and large predators in marine upwelling ecosystems such as the California Current System. Populations of these fish are highly variable over time and are characterized by extreme fluctuations in abundance, which have significant ecosystem impacts. The causes driving this instability...

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Dissertation

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, Tim Cowles, Kipp Shearman, Lorenzo Ciannelli, and Peter Bottomley. Each one has provided unique
Geochemical tracers of Arctic river waters

Creator:

Guay, Christopher K. H.

Resource Type:

Dissertation

Full Text:

, combined with other physical and chemical measurements, identifies areas where river waters cross the
The spectral backscattering properties of marine particles

Creator:

Whitmire, Amanda L.

Abstract:

The inherent and apparent optical properties of different ocean regimes are the basis for all optical remote sensing of the ocean. Ecological information derived from remote sensors therefore relies on having a detailed understanding of how particulate backscattering and absorption contribute to the bulk optical signal. The absorption characteristics of...

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Dissertation

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adviser, Tim Cowles, has been a steadfast source of support and instruction through all of my graduate
INDOEX aerosol optical depths and radiative forcing derived from AVHRR

Creator:

Tahnk, William Richard

Abstract:

The Indian Ocean Experiment (INDOEX) had as a primary objective determining the radiative forcing due to anthropogenic aerosols over climatologically significant space and time scales: the Indian Ocean during the winter monsoon, January-March. During the winter monsoon, polluted, low-level air from the Asian subcontinent blows over the Arabian Sea and...

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Dissertation

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3.7 Ratio of Channel 1 (XO.65 .tm) scattering cross section times the phase function to Channel 2 (X
Relationships of in situ spectral absorption, pigment ratios and environmental parameters for phytoplankton assemblages in coastal waters

Creator:

Eisner, Lisa B.

Abstract:

In situ optical measurements of spectral absorption and beam attenuation provide information on the fine scale horizontal and vertical variations in phytoplankton pigments and other measures of phytoplankton photophysiology and ecology in coastal waters. Phytoplankton pigment ratios from discrete sample analyses with High Performance Liquid Chromatography were compared to in...

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Dissertation

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ACKNOWLEDGMENTS I wish to thank my major advisor, Tim Cowles, for his continued support, guidance, patience and
Calanoid copepod diet in an upwelling system : phagotrophic protists vs. phytoplankton

Creator:

Fessenden, Lynne M.

Abstract:

Calanoid copepod diet was investigated in Oregon coastal waters to determine the trophic significance of phagotrophic protists as copepod prey within an ecosystem where the microplankton biomass is typically dominated by large diatoms. Prior to and during the 1991 upwelling season, clearance rates on phytoplankton and phagotrophic ciliates were measured...

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Dissertation

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, Tim Cowles, for his generous patience with my alternative time line, for encouraging me to publish
Dynamics of mesoscale motion in the California current

Creator:

Shearman, R. Kipp

Resource Type:

Dissertation

Full Text:

colleague. For this, I am grateful. I thank Drs. Tim Cowles and Bob Haney, who have enthusiastically

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Academic Affiliation

College of Oceanic and Atmospheric Sciences[remove]29

Advisor

Coakley, James A., jr.4
Cowles, Timothy J.4
Abbott, Mark R.2
Miller, Charles B.2
Mix, Alan C.2
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1994 to 2012

View distribution

Committee Member

Barnes, Jeffrey3
Strub, Ted3
Cowles, Timothy2
Esbensen, Steven2
Giovannoni, Steve2
more Committee Members »

Creator

Antonissen, Eric1
Chang, Fu Lung1
Davies, Maureen Helen1
Eisner, Lisa B.1
Fessenden, Lynne M.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1993 to 2011

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Decade

2010-20192
2000-200913
1990-199914

Degree Field

Oceanography24
Atmospheric Sciences5

Degree Level

Doctoral29

Degree Name

Doctor of Philosophy (Ph.D.)[remove]29

File Format

application/pdf3

Language

English [eng]29

License

All rights reserved11

Non-Academic Affiliation

Oregon State University. Graduate School29

Peer Reviewed

No27

Resource Type

Dissertation29

Rights Statement

Copyright Not Evaluated17
In Copyright12

Subject

Upwelling (Oceanography) -- California Current3
Marine ecology -- California Current2
Seawater -- Optical properties2
Upwelling (Oceanography) -- Pacific Coast (U.S.)2
Absorption spectra -- Mathematical models1
more Subjects »

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