| Title | Middle Eocene to early Oligocene paleoceanography of the Southern Ocean; critical events in the greenhouse to icehouse transition |
| Author | Bohaty, S.M. |
| Source | 305p. . Availability: Univ. Microfilms, Ann Arbor, MI, United States. ISBN: 978-0-542-95628-7 |
| Publication Date | 2006 |
| Notes | In English. Ph.D. thesis. GeoRef Acc. No: 284499. CRREL Acc. No: 62004769 |
| Index Terms | cooling; ice sheets; isotopes; ocean environments; metals; oxygen; paleoclimatology; variations; Antarctica-- East Antarctic ice sheet; Southern Ocean; alkaline earth metals; Antarctic ice sheet; Antarctica; calcium; carbon dioxide; Cenozoic; deep-sea environment; deep-water environment; East Antarctic ice sheet; Eocene; Foraminifera; high-resolution methods; Invertebrata; lower Oligocene; magnesium; marine environment; microfossils; middle Eocene; O-18/O-16; Oligocene; paleo- oceanography; paleoatmosphere; Paleogene; paleotemperature; Protista; stable isotopes; Tertiary |
| Abstract | A fundamental shift from "greenhouse" to "icehouse" climate modes occurred through the Eocene-Oligocene time interval, exemplified by a dramatic cooling of deep waters and the first appearance of large Antarctic ice sheets. Although these long term trends have been well established, very few high resolution paleo-oceanographic records have documented short-term climatic variability through this transition. To this end, I have constructed high resolution foraminiferal stable isotope and Mg/Ca temperature records at multiple deep sea drill sites, with a primary focus on Southern Ocean records that span the late middle Eocene-to-earliest Oligocene interval. When considered together, these new paleo-oceanographic records provide evidence of dynamic climate variability in the transition from greenhouse to icehouse climate states. (modif. auth. abstr.) |
| Publication Type | monograph |
| Record ID | 84088 |