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Controls on Stable Oxygen Isotope Concentrations in Coropuna and Quelccaya Peruvian Ice Cores Over the Last 200 Years

Birkos, Elizabeth
http://rave.ohiolink.edu/etdc/view?acc_num=osu1238093120

Abstract Details

2009, Master of Science, Ohio State University, Geological Sciences.
Oxygen isotopes are useful proxy records in ice cores because of the selective fractionation process that occurs during evaporation and condensation of water molecules, yet the controls on these fractionation processes are under debate for tropical ice core records. Two ice cores from the eastern and western range of the Peruvian Andes (Quelccaya Summit Dome and Coropuna Caldera Core) are annually resolved for the last 200 years and provide an excellent means for comparison to localized instrumental meteorological records as well as regional measures of past climate. The oxygen isotope histories from these cores show no significant correlation with temperature or precipitation from two nearby meteorological stations or an automated weather station on the summit of Quelccaya. Yet significant correlation is found on a regional scale with Lake Titicaca water levels as well as equatorial Pacific sea surface temperatures over recent time. However, overall trends for the last century offer conflicting evidence to this end. On centennial and millennial time scales, temperature has been shown to be positively correlated with oxygen isotopes in tropical ice cores, yet the mechanisms for this control need further research.
Lonnie Thompson (Advisor)
W. Berry Lyons (Committee Member)
Bryan Mark (Committee Member)
Geology
paleoclimatology; Quelccaya ice cap; Coropuna; oxygen isotopes; tropical glaciers; Peru; Andes

Recommended Citations

Citations

  • Birkos, E. (2009). Controls on Stable Oxygen Isotope Concentrations in Coropuna and Quelccaya Peruvian Ice Cores Over the Last 200 Years [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1238093120

    APA Style (7th edition)

  • Birkos, Elizabeth. Controls on Stable Oxygen Isotope Concentrations in Coropuna and Quelccaya Peruvian Ice Cores Over the Last 200 Years. 2009. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1238093120.

    MLA Style (8th edition)

  • Birkos, Elizabeth. "Controls on Stable Oxygen Isotope Concentrations in Coropuna and Quelccaya Peruvian Ice Cores Over the Last 200 Years." Master's thesis, Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1238093120

    Chicago Manual of Style (17th edition)

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© 2009, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.