Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea
Changes in intermediate and deep ocean circulation likely played a significant role in global carbon cycling and meridional heat/moisture transport during the middle Miocene climate transition (∼ 14 Ma). High-resolution middle Miocene (16–13 Ma) benthic foraminifer stable isotope records from the So...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Language: | unknown |
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Digital Commons @ University of South Florida
2009
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/586 https://doi.org/10.1016/j.palaeo.2009.10.019 |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1575 2023-07-30T03:58:45+02:00 Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea Tian, Jun Shevenell, Amelia E. Wang, Pinxian Li, Qianyu Cheng, Xinrong 2009-12-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/586 https://doi.org/10.1016/j.palaeo.2009.10.019 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/586 doi:10.1016/j.palaeo.2009.10.019 https://doi.org/10.1016/j.palaeo.2009.10.019 Marine Science Faculty Publications Middle Miocene Monterey carbon isotope excursion Oceanic circulation reorganization Global cooling Life Sciences article 2009 ftusouthflorida https://doi.org/10.1016/j.palaeo.2009.10.019 2023-07-13T20:45:14Z Changes in intermediate and deep ocean circulation likely played a significant role in global carbon cycling and meridional heat/moisture transport during the middle Miocene climate transition (∼ 14 Ma). High-resolution middle Miocene (16–13 Ma) benthic foraminifer stable isotope records from the South China Sea reveal a reorganization of regional bottom waters, which preceded the globally recognized middle Miocene ∼ 1‰ δ18O increase (13.8 Ma) by 100,000 years. An observed reversal of the benthic foraminifera δ13C gradient between ODP Sites 1146 (2092 m) and 1148 (3294 m; 13.9–13.5 Ma) is interpreted to reflect an increase in the southward flux of low δ13C deep (> 2000 m) Pacific Ocean waters (Flower and Kennett, 1993; Shevenell and Kennett, 2004). Large-scale changes in Pacific intermediate and deep ocean circulation, coupled with enhanced global carbon cycling at the end of the Monterey Carbon Isotope excursion, likely acted as internal feedbacks to the Earth's climate system. These feedbacks reduced the sensitivity of Antarctica to lower latitude-derived heat/moisture and facilitated the transition of the Earth's climate system to a new, relatively stable glacial state. Article in Journal/Newspaper Antarc* Antarctic Antarctica University of South Florida St. Petersburg: Digital USFSP Antarctic Kennett ENVELOPE(-65.167,-65.167,-67.117,-67.117) Pacific Palaeogeography, Palaeoclimatology, Palaeoecology 284 3-4 375 382 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Middle Miocene Monterey carbon isotope excursion Oceanic circulation reorganization Global cooling Life Sciences |
spellingShingle |
Middle Miocene Monterey carbon isotope excursion Oceanic circulation reorganization Global cooling Life Sciences Tian, Jun Shevenell, Amelia E. Wang, Pinxian Li, Qianyu Cheng, Xinrong Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
topic_facet |
Middle Miocene Monterey carbon isotope excursion Oceanic circulation reorganization Global cooling Life Sciences |
description |
Changes in intermediate and deep ocean circulation likely played a significant role in global carbon cycling and meridional heat/moisture transport during the middle Miocene climate transition (∼ 14 Ma). High-resolution middle Miocene (16–13 Ma) benthic foraminifer stable isotope records from the South China Sea reveal a reorganization of regional bottom waters, which preceded the globally recognized middle Miocene ∼ 1‰ δ18O increase (13.8 Ma) by 100,000 years. An observed reversal of the benthic foraminifera δ13C gradient between ODP Sites 1146 (2092 m) and 1148 (3294 m; 13.9–13.5 Ma) is interpreted to reflect an increase in the southward flux of low δ13C deep (> 2000 m) Pacific Ocean waters (Flower and Kennett, 1993; Shevenell and Kennett, 2004). Large-scale changes in Pacific intermediate and deep ocean circulation, coupled with enhanced global carbon cycling at the end of the Monterey Carbon Isotope excursion, likely acted as internal feedbacks to the Earth's climate system. These feedbacks reduced the sensitivity of Antarctica to lower latitude-derived heat/moisture and facilitated the transition of the Earth's climate system to a new, relatively stable glacial state. |
format |
Article in Journal/Newspaper |
author |
Tian, Jun Shevenell, Amelia E. Wang, Pinxian Li, Qianyu Cheng, Xinrong |
author_facet |
Tian, Jun Shevenell, Amelia E. Wang, Pinxian Li, Qianyu Cheng, Xinrong |
author_sort |
Tian, Jun |
title |
Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
title_short |
Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
title_full |
Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
title_fullStr |
Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
title_full_unstemmed |
Reorganization of Pacific Deep Waters Linked to Middle Miocene Antarctic Cryosphere Expansion: A Perspective from the South China Sea |
title_sort |
reorganization of pacific deep waters linked to middle miocene antarctic cryosphere expansion: a perspective from the south china sea |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2009 |
url |
https://digitalcommons.usf.edu/msc_facpub/586 https://doi.org/10.1016/j.palaeo.2009.10.019 |
long_lat |
ENVELOPE(-65.167,-65.167,-67.117,-67.117) |
geographic |
Antarctic Kennett Pacific |
geographic_facet |
Antarctic Kennett Pacific |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/586 doi:10.1016/j.palaeo.2009.10.019 https://doi.org/10.1016/j.palaeo.2009.10.019 |
op_doi |
https://doi.org/10.1016/j.palaeo.2009.10.019 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
284 |
container_issue |
3-4 |
container_start_page |
375 |
op_container_end_page |
382 |
_version_ |
1772821480280686592 |