Impact of Antarctic Circumpolar Current Development on Late Paleogene Ocean Structure ℃ ‰ 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정 2013.12.07.

Presentation on theme: "Impact of Antarctic Circumpolar Current Development on Late Paleogene Ocean Structure ℃ ‰ 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정 2013.12.07."— Presentation transcript:

1 Impact of Antarctic Circumpolar Current Development on Late Paleogene Ocean Structure
℃ ‰ 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

2 01 Antarctic Circumpolar Current(ACC)
Middle Eocene ~ Late Oligocene Feature of modern ocean structure Antarctic isolation Link main oceans Influence intermediate-water NOT EXIST ALWAYS!!! 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

3 02 Antarctic Isolation 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

4 ASP-5, site 1053 ASP-5 Growth of Antarctic ice sheets
$ ASP-5, site 1053 Benthic foraminiferal δ18O ASP-5 Mg/Ca Growth of Antarctic ice sheets Mg/Ca cooling(~2.5ºC) ℃ 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

5 03 Multi-layer Ocean ACC Strength Antarctic Intermediate Water
Ventilation Deep low O2 and low δ13C layer 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

6 9조 Southern-sourced intermediate water strengthen δ13C decreased
Coldest water isolation NADW moved to Antarctic SCW confinement 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

7 9조 GSR subsidence NCW spread to South Atlantic 4-layer Ocean structure
강태웅, 이승우, 송호정, 이정윤, 한혜정

8 04 Summary Middle Eocene Early Oligocene Late Oligocene Late Eocene 9조
Drake passage Open Tasman gateway Deepening ACC strengthen Drake passage Deepening Our results indicate that changes in tectonic gateways affected late middle Eocene to early Miocene ocean circulation, which in turn affected global climate. 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정

9 ‰ ℃ THANK YOU. δ18O δ13C ANT QUESTION? 9조 강태웅, 이승우, 송호정, 이정윤, 한혜정