DOI: 10.5194/cp-10-1001-2014
Scopus记录号: 2-s2.0-84901290696
论文题名: Low-latitude climate variability in the Heinrich frequency band of the Late Cretaceous greenhouse world
作者: De Winter N.J. ; Zeeden C. ; Hilgen F.J.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 3 起始页码: 1001
结束页码: 1015
语种: 英语
Scopus关键词: climate change
; climate variation
; Cretaceous
; Heinrich event
; latitude
; Neogene
; nonlinearity
; paleolatitude
; Mediterranean Region
英文摘要: Deep marine successions of early Campanian age from DSDP (Deep Sea Drilling Project) site 516F drilled at low paleolatitudes in the South Atlantic reveal distinct sub-Milankovitch variability in addition to precession, obliquity and eccentricity-related variations. Elemental abundance ratios point to a similar climatic origin for these variations and exclude a quadripartite structure as an explanation for the inferred semi-precession cyclicity in the magnetic susceptibility (MS) signal as observed in the Mediterranean Neogene for precession-related cycles. However, semi-precession cycles as suggested by previous work are likely an artifact reflecting the first harmonic of the precession signal. The sub-Milankovitch variability, especially in MS, is best approximated by a ~ 7 kyr cycle as shown by spectral analysis and bandpass filtering. The presence of sub-Milankovitch cycles with a period similar to that of Heinrich events of the last glacial cycle is consistent with linking the latter to low-latitude climate change caused by a non-linear response to precession-induced variations in insolation between the tropics. Copyright © 2014 by ASME. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49266
Appears in Collections: 气候变化与战略
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Recommended Citation:
De Winter N.J.,Zeeden C.,Hilgen F.J.. Low-latitude climate variability in the Heinrich frequency band of the Late Cretaceous greenhouse world[J]. Climate of the Past,2014-01-01,10(3)