globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.07.025
Scopus记录号: 2-s2.0-85050739728
论文题名:
Paleoceanography of the east equatorial Pacific over the past 16 Myr and Pacific–Atlantic comparison: High resolution benthic foraminiferal δ18O and δ13C records at IODP Site U1337
作者: Tian J.; Ma X.; Zhou J.; Jiang X.; Lyle M.; Shackford J.; Wilkens R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 499
起始页码: 185
结束页码: 196
语种: 英语
英文关键词: Atlantic–Pacific δ13C divergence ; benthic foraminiferal δ18O and δ13C ; eccentricity forcing ; Neogene paleoceanography ; ocean carbon cycle ; Pliocene and Miocene glaciation
Scopus关键词: Carbon ; Isotopes ; Oceanography ; Stratigraphy ; Submarine geophysics ; Surface waters ; Weathering ; East antarctic ice sheets ; eccentricity forcing ; Miocene ; Northern hemisphere glaciations ; Ocean carbon cycle ; Paleoceanography ; Sea-surface temperature change ; Stratigraphic correlation ; Glacial geology ; benthic foraminifera ; carbon cycle ; comparative study ; glaciation ; Miocene ; Northern Hemisphere ; oxygen isotope ; paleoceanography ; Pliocene ; resolution ; Atlantic Ocean ; Pacific Ocean ; Pacific Ocean (Equatorial)
英文摘要: We present astronomically tuned high resolution (∼3–4 Kyr) 15.8-Myr long benthic foraminiferal δ18O and δ13C records from IODP Site U1337 in the east equatorial Pacific, which provide a reference standard for stratigraphic correlation of deep sea sediments. A long-term glaciation history over the past 15.8 Myr has been recorded in the δ18O. Two of the most significant glaciation events include the East Antarctic Ice Sheet expansion (EAIE) at 13.8 Ma and the final onset of the Northern Hemisphere Glaciation (NHG) in 3.3–2.5 Ma. A series of Miocene and Pliocene glaciation events exist between the EAIE and NHG, which are important glaciation attempts before the Earth finally entered the full “icehouse” world in the late Pleistocene. A long-term ocean carbon isotope decrease over the past 15.8 Myr has been recorded in the δ13C. Ocean circulation change was the major cause of the ocean carbon isotope decrease in 9.4–8.1 Ma and 4–0 Ma, whereas strengthened continental chemical weathering controlled the long-term ocean carbon isotope decrease in most of the time of the past 15.8 Myr. The divergence in benthic foraminiferal δ13C and εNd provides strong evidence of significant ocean circulation change between 12.1 and 9.2 Ma which was probably related to the formation of the Isthmus of Panama. The internal feedbacks such as continental weathering and sea surface temperature change have great potential for modulating the weak 100 and 400 Kyr signals in astronomical forcing into strong 100 and 400 Kyr signals in global ice volume and carbon cycle. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109709
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg., Corvallis, OR 97331, United States; Department of Oceanography, Texas A&M University, TAMU 3146, College Station, TX 77840-3146, United States; Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, 1680 East West Road, Honolulu, HI 96822, United States

Recommended Citation:
Tian J.,Ma X.,Zhou J.,et al. Paleoceanography of the east equatorial Pacific over the past 16 Myr and Pacific–Atlantic comparison: High resolution benthic foraminiferal δ18O and δ13C records at IODP Site U1337[J]. Earth and Planetary Science Letters,2018-01-01,499
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