Research Interests: I am currently in the process of developing my thesis project. My interests include late Holocene marine variability especially of water column temperature along Pacific continental margins. I am hoping to investigate such variability over the last millennium with resolution of decades to centuries off the coast of central Chile, and compare the results to those from numerous studies of decadal variability in the North and Tropical Pacific. Analyses of stable oxygen isotope ratios in benthic foraminifera preserved in sediment cores taken from the South American continental margin (water depth around 500 m) will be used to carry out this study. I am also interested in the connection between ocean and atmosphere dynamics on these timescales, and may try to investigate variability in continental rainfall by examining terrigenous material found in the offshore sediments.
Some Background: Patterns of decadal variability have been extensively observed in mid latitudes North Pacific sea surface temperature and sea level pressure, and have been shown to correlate with ecological and atmospheric variability (e.g. Mantua et al., 1997). Understanding the natural components of this variability is a crucial part in investigating the effect of anthropogenic activities on regional and global climate. Furthermore, very little is known about the existence and behavior of similar patterns of variability in the South Pacific. As the both oceanic and atmospheric processes most likely play a role in these patterns, a study examining variability in both may shed light on recent climate dynamics of the South Pacific mid latitudes. -------------------------------------------------------------------------------------------------- Lydia D. Roach-Curriculum Vitae Lydia Roach Scripps Institution of Oceanography-UCSD 9500 Gilman Dr mail code 0208 La Jolla, CA 92093-0208 Phone: (858) 534-4717 Education
Experience Sept 2004-Present: Graduate Student Researcher, Scripps Institution of Oceanography Analysis of marine sediment geochemical proxy records such as stable oxygen and carbon isotopes to investigate temperature and circulation variability. Principle Investigator: Dr. Christopher Charles. June-August 2003: REU Fellow Research Assistant, University of Idaho Geochemical investigation of the solubility of Pd in the presence of the siderophore chealators, use of analytical techniques such as Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). Supervisor: Dr. Scott Wood. May-August 2003: Backcountry Hut Caretaker, White Mountains, NH Maintenance of Carter Notch hut and supervision of guest accommodation, on-foot transportation of food and waste in and out of backcountry. Supervisor: Caitlyn Grey May 2002-June 2004: Undergraduate Student Research Assistant, Barnard College Investigating the presence of organic contaminants and toxins in freshwater and estuarine systems, use of analytical techniques such as Gas Chromatography/Mass Spectrometry (GC/MS). Supervisor: Dr. Elizabeth Kujawinski, now at Woods Hole Oceanographic Institution.
Fellowships and Honors
Publications Normand C, Wood S.A. and Roach L. D., 2004. Effect of the siderophore Desferrioxamine-B on the mobility of Pd. Geochimica et cosmochimica acta. 68(11), A359 Supplement S.
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