DOI: 10.1016/j.epsl.2017.12.041
Scopus记录号: 2-s2.0-85044572232
论文题名: Temperature correlations between the eastern equatorial Pacific and Antarctica over the past 230,000 years
作者: Koutavas A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 485 起始页码: 43
结束页码: 54
语种: 英语
英文关键词: Antarctica
; CO2
; Eastern equatorial Pacific
; glacial inception
; NADW
; sea surface temperature
Scopus关键词: Atmospheric radiation
; Atmospheric temperature
; Carbon dioxide
; Glacial geology
; Repair
; Submarine geophysics
; Surface properties
; Surface waters
; Antarctica
; Eastern equatorial Pacific
; glacial inception
; NADW
; Sea surface temperature (SST)
; Oceanography
; carbon dioxide
; equatorial dynamics
; marine isotope stage
; North Atlantic Deep Water
; radiative forcing
; reconstruction
; sea surface temperature
; Antarctica
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: Tropical sea surface temperatures (SSTs) warmed and cooled in step with the Pleistocene ice age cycles, but the mechanisms are not known. It is assumed that the answer must involve radiative forcing by CO2 but SST reconstructions have been too sparse for a conclusive test. Here I present a 230,000-yr tropical SST stack from the eastern equatorial Pacific (EEP) using two new Mg/Ca reconstructions combined with three earlier ones. The EEP stack shows persistent covariation with Antarctic temperature on orbital and millennial timescales indicating tight coupling between the two regions. This coupling however cannot be explained solely by CO2 forcing because in at least one important case, the Marine Isotope Stage (MIS) 5e–5d glacial inception, both regions cooled ∼5–6.5 thousand years before CO2 decreased. More likely, their covariation was due to advection of Antarctic climate signals to the EEP by the ocean. To explain the MIS 5e–5d event and glacial inception in general the hypothesis is advanced that the cooling signal spreads globally from the Northern Hemisphere with an active ocean circulation – first from the North Atlantic to the Southern Ocean with a colder North Atlantic Deep Water, and then to the Indian and Pacific Oceans with cooler Antarctic deep and intermediate waters. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110036
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: College of Staten Island, City University of New York, Department of Engineering Science & Physics, 2800 Victory Blvd, Staten Island, NY 10314, United States; Doctoral Program in Earth and Environmental Sciences, Graduate Center, City University of New York, 365 Fifth Avenue, New York, NY 10016, United States; Lamont-Doherty Earth Observatory of Columbia University, 61 Rt 9W, Palisades, NY 10964, United States
Recommended Citation:
Koutavas A.. Temperature correlations between the eastern equatorial Pacific and Antarctica over the past 230,000 years[J]. Earth and Planetary Science Letters,2018-01-01,485