DOI: 10.1002/2015GL064215
论文题名: The evolution of the equatorial thermocline and the early Pliocene El Padre mean state
作者: Ford H.L. ; Ravelo A.C. ; Dekens P.S. ; Lariviere J.P. ; Wara M.W.
刊名: Geophysical Research Letters
ISSN: 0094-8654
EISSN: 1944-8385
出版年: 2015
卷: 42, 期: 12 起始页码: 4878
结束页码: 4887
语种: 英语
英文关键词: Mg/Ca
; Pliocene
; thermocline
Scopus关键词: Atmospheric temperature
; Oceanography
; Surface waters
; Temperature distribution
; Tropics
; Early pliocene
; Eastern equatorial Pacific
; Equatorial Pacific
; Measurements of
; Pliocene
; Sea Surface Temperature gradients
; Subsurface temperature
; Tropical dynamics
; Stream flow
; calcium
; cooling
; foraminifera
; fossil record
; magnesium
; perforation
; Pliocene
; sea surface temperature
; thermocline
; Pacific Ocean
; Pacific Ocean (Tropical)
; Globorotalia tumida
英文摘要: The tropical Pacific thermocline strength, depth, and tilt are critical to tropical mean state and variability. During the early Pliocene (∼3.5 to 4.5 Ma), the Eastern Equatorial Pacific (EEP) thermocline was deeper and the cold tongue was warmer than today, which resulted in a mean state with a reduced zonal sea surface temperature gradient or El Padre. However, it is unclear whether the deep thermocline was a local feature of the EEP or a basin-wide condition with global implications. Our measurements of Mg/Ca of Globorotalia tumida in a western equatorial Pacific site indicate Pliocene subsurface temperatures warmer than today; thus, El Padre included a basin-wide thermocline that was relatively warm, deep, and weakly tilted. At ∼4 Ma, thermocline steepening was coupled to cooling of the cold tongue. Since ∼4 Ma, the basin-wide thermocline cooled/shoaled gradually, with implications for thermocline feedbacks in tropical dynamics and the interpretation of TEX86-derived temperatures. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948713873&doi=10.1002%2f2015GL064215&partnerID=40&md5=b51745a3bb0bee10bf4180af70aaa0dc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8270
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Ocean Sciences, University of California, Santa Cruz, CA, United States
Recommended Citation:
Ford H.L.,Ravelo A.C.,Dekens P.S.,et al. The evolution of the equatorial thermocline and the early Pliocene El Padre mean state[J]. Geophysical Research Letters,2015-01-01,42(12).