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The centennial and millennial variability of the IndoPacific Warm Pool and the Indonesian Throughflow

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dc.contributor.author Gibbons, Fern T.
dc.coverage.spatial Indonesian Throughflow
dc.date.accessioned 2012-04-19T13:22:32Z
dc.date.available 2012-04-19T13:22:32Z
dc.date.issued 2012-02
dc.identifier.uri http://hdl.handle.net/1912/5136
dc.description Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 2012 en_US
dc.description.abstract As the only low-latitude connection between ocean basins, the Indonesian Throughflow allows the direct transmission of heat and salinity between the Pacific and Indian Oceans. The Mg/Ca and δ18O of calcite of Globigerinoides ruber (G. ruber) were used to estimate the sea surface temperature (SST) and δ18O of water, an indicator of hydrologic conditions, over the past 20,000 years. I also attempted to estimate thermocline structure using Pulleniatina obliquiloculata, but the Mg/Ca and δ18O of calcite data yield conflicting interpretations, indicating further work on this proxy is required. The G. ruber Mg/Ca results suggest that the SST of the outflow passages were influenced by high latitude Southern Hemisphere temperature. At approximately 10,000 years before present, there was a warming in the Makassar Strait. This local warming was coincident with the flooding of the Sunda Shelf, which opened a connection between the South China Sea and the Indonesian Throughflow. Regional δ18O of seawater reconstructions suggest that the mean position of the Intertropical Convergence Zone (ITCZ) was approximately the same as modern at the last glacial maximum and was displaced to the south during the Younger Dryas and Heinrich Stadial 1, suggesting the ITCZ responds to changes in the interhemispheric temperature gradient. en_US
dc.description.sponsorship This work was supported by an MIT Presidential Graduate Fellowship, WHOI Academic Programs Office Funds, the USGS, and the following grants from the National Science Foundation: OCE 07-­26986, OCE 05-02960, and OCE 10-03974. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher Massachusetts Institute of Technology and Woods Hole Oceanographic Institution en_US
dc.relation.ispartofseries WHOI Theses en_US
dc.subject Heat en_US
dc.subject Water temperature en_US
dc.title The centennial and millennial variability of the IndoPacific Warm Pool and the Indonesian Throughflow en_US
dc.type Thesis en_US
dc.identifier.doi 10.1575/1912/5136


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