DOI: 10.1016/j.gloplacha.2017.02.006
论文题名: Glacial terminations and the Last Interglacial in the Okhotsk Sea; Their implication to global climatic changes
作者: Gorbarenko S. ; Velivetskaya T. ; Malakhov M. ; Bosin A.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2017
卷: 152 起始页码: 51
结束页码: 63
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Glacial geology
; Glaciers
; Ice
; Productivity
; Sea level
; Continental ice sheet
; East Asian monsoon
; Environment state
; Glacial terminations
; Global climatic changes
; Ice rafted debris
; Last interglacial
; Northern Hemispheres
; Climate change
英文摘要: Paleoclimate data from the Okhotsk Sea (OS) over Terminations II and I (TII, TI), and the Last and Present Interglacial (LIG, PIG) periods were compiled in order to examine Northern Hemisphere climate and sea level changes. Based on records of four AMS 14C-dated OS cores over TI-PIG, it is argued that the OS productivity/climate, IRD (ice-rafted debris), and benthic foraminiferal oxygen isotope (δ18Obf) proxies provide representative and in-phase evidence of the Northern Hemisphere climate and continental ice sheet changes consistent with the LR 04 δ18Obf curve. Chronologies for two central OS cores over TII-LIG-cooling event 23 (C23) were constructed by correlating OS productivity proxies with well-dated δ18O records of Chinese speleothems because OS environment is modulated by East Asian Monsoon; and, as well as correlating measured magnetic paleointensity excursions with those in the dated PISO-1500 paleointensity stack. Results show several OS climatic and environment states, including TII coeval with Asian Weak Monsoon Interval (WMI) II since 136 ka, LIG with a sharp two-step transition (130.2–129 ka) and demise at С25 (116.5 ka), and last glaciation with coolings at C24 (111 ka) and C23. The OS productivity and IRD records demonstrate certain climate amelioration in the middle of WMI-II, and two insignificant cooling events inside the LIG marked by C27 (126 ka) and C26 (120.6 ka). OS δ18Obf records of both cores demonstrate a gradual trend of lighter values since around 131.5 ka BP, continuing from the onset of LIG (129 ka) to minimum values at 126 ka BP (C27), then nearly constant values until 121.5 ka, followed by a slight increase up to 120.6 ka (C26), and a subsequent strong increase up to 116.5 ka (C25). The magnitude of OS δ18Obf oscillations is 1.35‰, which is less than those in the N. Atlantic. It may therefore be suggested that this OS index probably tracks changes in continental ice sheet volume and sea level. © 2017 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014814544&doi=10.1016%2fj.gloplacha.2017.02.006&partnerID=40&md5=0ece832b3d1441f639e3cde23c45a815
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11742
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: V.I. Il'ichev Pacific Oceanological Institute, Far East Branch of Russian Academy of Science, (FEB of RAS), Vladivostok, Russian Federation
Recommended Citation:
Gorbarenko S.,Velivetskaya T.,Malakhov M.,et al. Glacial terminations and the Last Interglacial in the Okhotsk Sea; Their implication to global climatic changes[J]. Global and Planetary Change,2017-01-01,152.