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Filtering by: Alternative title ssim Seasonality of U-37(K)' temperature estimates as inferred from sediment trap data Remove constraint Alternative title ssim: Seasonality of U-37(K)' temperature estimates as inferred from sediment trap data Advisor Mix, Alan C. Remove constraint Advisor: Mix, Alan C.

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The Global Overturning Circulation Since the Last Glacial Maximum Based on Marine Authigenic Neodymium Isotopes

Creator:

Du, Jianghui

Abstract:

The Global Overturning Circulation (GOC) is a major component of the global climate system. Understanding its behavior is pertinent to our prediction of climate change in the future. The lack of long-term observations of GOC in the modern instrumental era necessitates studies of GOC using paleoceanographic records. Of great interest...

Resource Type:

Dissertation

Full Text:

direct observations of SOMOC to date, such that most of our knowledge of its change comes from data
Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points

Creator:

Praetorius, Summer Kate

Abstract:

Paleoclimate archives have revealed abrupt climate events that are superimposed on more gradual climate changes throughout the last glacial and deglacial periods. The underlying causes of such rapid climate changes are still poorly understood, but the strong expression of these events in northern hemisphere records likely points to climatic mechanisms...

Resource Type:

Dissertation

Full Text:

). Estimates of climate sensitivity, defined as the global mean temperature change based on a doubling of
Millennial-scale surface and deep water oscillations in the N.E. Pacific : implications for late pleistocene climate change

Creator:

Lund, David Charles

Resource Type:

Masters Thesis

Full Text:

Temperature 36 3.5 Results 38 3.6 Discussion 39 3.6.1 Advection vs. Upwelling 39 3.6.2 Timing of Events 43
The Atlantic, the Amazon, and the Andes : neogene climate and tectonics viewed from Ceara Rise, western tropical Atlantic

Creator:

Harris, Sara E.

Resource Type:

Dissertation

Full Text:

approved: Alan C. Mix High resolution proxy estimates of western tropical Atlantic sediment composition
Living planktic foraminifera as environmental indicators in the central equatorial Pacific Ocean

Creator:

Watkins, James M. (James Martin)

Resource Type:

Masters Thesis

Full Text:

, JGOFS data system). C uptake estimates of primary productivity were measured daily from samples taken
Foraminiferal assemblages preserved in surface sediments correspond to multiple environmental and preservation variables

Creator:

Ross, Ann E. Morey

Abstract:

Here we investigate the relationships between modern foraminiferal assemblages from Atlantic and Pacific surface sediment samples and multiple environmental properties including water column and preservation variables using Canonical Correspondence Analysis (CCA). CCA finds two fauna] dimensions that are highly correlated to the environmental variables included in the analysis, and then...

Resource Type:

Masters Thesis

Full Text:

remaining faunal variance. 2.2. Data The data consist of foraminiferal assemblages from surface sediment
Late pleistocene changes in the Peru current based on planktonic foraminifera

Creator:

Feldberg, Melissa J.

Abstract:

Planktonic foraminiferal faunal assemblages were used to estimate sea-surface temperatures (SST) in the southeast Pacific Ocean during the Last Glacial Maximum (LGM) and off the coast of Peru over the last 150,000 years. Temperatures along the eastern boundary of South America were 6-8° C cooler during the LGM than at...

Resource Type:

Masters Thesis

Full Text:

102 Appendix D: Sea-Surface Temperature Estimates 107 LIST OF FIGURES Figure 111 2.1 (a) Surface
Modern and past climate variability in the eastern Pacific warm pool

Creator:

Benway, Heather M.

Abstract:

Westward transport of water vapor across the Panama Isthmus helps to maintain the salinity contrast between the Atlantic and Pacific Oceans, important in thermohaline circulation and global climate. Relatively low sea-surface salinities and a strong, shallow pycnocline in the eastern Pacific warm pool (EPWP) region near Central America reflect high...

Resource Type:

Dissertation

Full Text:

....................... 49 3.4. Comparison of batch and continuous Mg/Ca-based temperature estimates for G. ruber from a
Paleoclimate, paleoventilation, and paleomagnetism as recorded in a 17kyr marine sediment record from the SE Alaska margin

Creator:

Davies, Maureen Helen

Abstract:

The deglacial behavior of the sub-Arctic North Pacific is poorly constrained, with many published records suffering from limited age control due to extensive post- depositional biogenic carbonate dissolution. Potential alternative dating methods could include the correlation of stable-isotopic and/or paleomagnetic secular variation records to an independently-dated regional template, however no...

Resource Type:

Dissertation

Full Text:

variability from a single location, as well as to place observations of Northeast Pacific paleoclimate and
Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Creator:

Wolhowe, Matthew D.

Abstract:

Recent works have investigated use of the hydrogen isotopic composition of C₃₇ alkenones (δD[subscript K37s]), lipid biomarkers of certain haptophyte microalgae, as an independent paleosalinity proxy. I discuss herein the factors impeding such an application and identify the potential alternative use of δD[subscript K37s] measurements as a proxy for non-thermal,...

Resource Type:

Masters Thesis

Full Text:

from one biogeographical regime to another, as now seems to be the case for deviations of KU ′37

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Academic Affiliation

College of Oceanic and Atmospheric Sciences9
College of Earth, Ocean, and Atmospheric Sciences2

Advisor

Mix, Alan C.[remove]11
Haley, Brian A.1
Prahl, Fredrick G.1
Stoner, Joseph S.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1996 to 2019

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Committee Member

Brook, Edward2
Schmittner, Andreas2
Baham, John1
Christie, Dave1
Clark, Peter1
more Committee Members »

Creator

Benway, Heather M.1
Davies, Maureen Helen1
du, Jianghui1
Feldberg, Melissa J.1
Harris, Sara E.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1996 to 2019

View distribution

Decade

2010-20193
2000-20095
1990-19993

Degree Field

Oceanography10
Ocean, Earth, and Atmospheric Science1

Degree Level

Doctoral6
Master's5

Degree Name

Doctor of Philosophy (Ph.D.)6
Master of Science (M.S.)5

File Format

application/pdf1

Language

English [eng]11

License

All rights reserved6

Non-Academic Affiliation

Oregon State University. Graduate School10

Peer Reviewed

No11

Resource Type

Dissertation6
Masters Thesis5

Rights Statement

In Copyright6
Copyright Not Evaluated5

Subject

Chemical oceanography2
Marine sediments -- Atlantic Ocean2
Climatic changes -- North Pacific Ocean1
Climatic changes -- North Pacific Region1
Coccolithus huxleyi1
more Subjects »

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