230Th, 231Pa, and 10Be in particle size fractions of an opal-rich sediment of the Atlantic Southern Ocean

This study centers on the question: How sensitive are 231Pa/230Th and 10Be/230Th to sediment composition and redistribution? The natural radionuclides 231Pa, 230Th and 10Be recorded in deep sea sediments are tracers for water mass advection and particle fluxes. We investigate the influence of oceanic particle composition on the element adsorption in order to improve our understanding of sedimentary isotope records. We present new data on particle size specific 231Pa and 10Be concentrations. An additional separation step, based on settling velocities, led to the isolation of a very opal-rich phase. We find that opal-rich particles contain the highest 231Pa and 10Be concentrations, and higher 231Pa/230Th and 10Be/230Th isotope ratios than opal-poor particles. The fractionation relative to 230Th induced by the adsorption to opal-rich particles is more pronounced for 231Pa than for 10Be. We conclude that bulk 231Pa/230Th in Southern Ocean sediments is most suitable as a proxy for past opal fluxes. The comparison between two neighboring cores with rapid and slow accumulation rates reveals that these isotope ratios are not influenced significantly by the intensity of sediment focusing at these two study sites. However, a simulation shows that particle sorting by selective removal of sediment (winnowing) could change the isotope ratios. Consequently, 231Pa/230Th should not be used as paleocirculation proxy in cases where a strong loss of opal-rich material due to bottom currents occurred.

(Table 1) Age determination of sediment core SO139-74KL

A multiproxy record has been acquired from a piston core (SO139-74KL) taken offshore southern Sumatra, an area which is situated in the southwestern sector of the tropical Indo-Pacific Warm Pool. The high-resolution data sets (X-ray fluorescence, total organic carbon, and C37 alkenones) were used to track changes in paleoproductivity, freshwater budget, and sea surface temperature (SST) of the tropical climate system at orbital time scales over the past 300 ka. Our paleoclimatic data show that enhanced marine paleoproductivity was directly related to strengthening of coastal upwelling during periods of increased boreal summer insolation and associated SE monsoon strength with a precessional cyclicity. Changes in freshwater supply were primarily forced by precession-controlled changes in boreal NW winter monsoon rainfall enclosing an additional sea level component. SST variations of 2°-5°C occurred at eccentricity and precessional cyclicity. We suggest that the sea surface temperature variability off southern Sumatra is predominantly related to three major causes: (1) variations in upwelling intensity; (2) an elevated freshwater input into the southern Makassar Strait leading to reduced supply of warmer surface waters from the western Pacific and increased subsurface water transport via the Indonesian Throughflow into the Indian Ocean; and (3) long-term changes in the intensity or frequency of low-latitude climate phenomena, such as El Niño-Southern Oscillation.

An eighteenth century miscellany; the classics of the eighteenth century which typify and reveal an era: Jonathan Swift, Alexander Pope, John Gay...[and others]

Swift, Jonathan. The Drapier's letters.--Pope, Alexander. The Dunciad.--Gay, John. The beggar's opera.--Chesterfield, Earl of. Selected letters to his son.-- Sterne, Laurence. A sentimental journey through France and Italy.--Walpole, Horace. The castle of Otranto.--Sheridan, R. B. The school for scandal.--Gibbon, Edward. Memoirs of my life and writings.--Blake, William. Songs of innocence and songs of experience.

The antiquities of Palmyra : containing the history of the city and its emperors from its foundation to the present time : with an appendix of critical observations on the names, religion, and government of the country, and a commentary on the inscriptions lately found there.

Errata, last leaf.

An eighteenth century anthology;

Mode of access: Internet.

An attempt to illustrate those Articles of the Church of England which the Calvinists improperly consider as Calvinistical : in eight sermons preached before the University of Oxford, in the year MDCCCIV, at the lecture founded by J. Bampton, M.A., Canon of Salisbury /

Binder's title: Bampton lectures. 1804.

An essay on the state of literature and learning under the Anglo-Saxons; introductory to the first section of the Biographia britannica literaria of the Royal society of literature.

Mode of access: Internet.

The life of Samuel Johnson, LL.D. : Including a journal of his tour to the Hebrides /

Errata: v. 1, p. 376.

An apology for the life of Mr. Colley Cibber, comedian /

Running title: The life of Mr. Colley Cibber.

An inaugural lecture on the utility of Anglo-Saxon literature; to which is added The geography of Europe, by King Alfred, including his account of the discovery of the North cape in the ninth century.

"The geography of Europe; extracted from King Alfred's Anglo-Saxon version of Orosius": p. [57]-90. "Notes on the first chapter of the first book of Ælfred's Anglo-Saxon version of Orosius. By Mr. J. R. Forster": p. [91]-112.

An analysis of ancient domestic architecture, exhibiting some of the best existing examples in Great Britain, from drawings & measurements taken on the spot,

Includes contents of the author's Examples of ancient domestic architecture illustrating hospitals, bede houses, schools, almshouses, etc. of the middle ages in England. cf. Pref., v. 1.

An Asylum for fugitive pieces, in prose and verse, not in any other collection: with several pieces never before published. A new ed., including pieces not in the former edition, and several never before printed.

Collected by John Almon.

The works of John Knox /

Includes indexes.

Value Assessment of Orphan Drugs and Treatments for Rare Diseases

Thesis (Master's)--University of Washington, 2016-06

Female Exiles in Language: Reading for New Poetic Subjects in Modern and Contemporary Feminist Experimental Poetry

Thesis (Ph.D.)--University of Washington, 2016-06