DOI: 10.1016/j.palaeo.2016.01.009
论文题名: North Atlantic climatic changes reflected in the Late Quaternary foraminiferal abundance record of the Andaman Sea, north-eastern Indian Ocean
作者: Sijinkumar A.V. ; Nagender Nath B. ; Clemens S.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 446 起始页码: 11
结束页码: 18
语种: 英语
英文关键词: Andaman Sea
; Dansgaard-Oeschger events
; Globigerina rubescens
; Heinrich events
; Neogloboquadrina dutertrei
; North Atlantic
英文摘要: Here, we present planktonic foraminiferal, benthic foraminiferal and other proxy profiles from well-dated sediment cores in the Andaman Sea showing changes in climate and oceanography at Dansgaard-Oeschger (D/O) and Heinrich scales. The large temporal variations in the abundances of total benthic foraminifera, Globigerina rubescens and Neogloboquadrina dutertrei suggest substantial changes in the surface to bottom hydrography of the Andaman Sea. G. rubescens abundance minima during the last glacial cycle correspond to warm interstadials (D/O events 1 to 14) while maxima correspond to Heinrich events (H1 to H4), the last glacial maximum (LGM) and the Younger Dryas. D/O events are marked by very low G. rubescens and high N. dutertrei abundances which indicate freshened surface water related to increased direct precipitation (over evaporation) and strengthened Irrawaddy outflow. Lower abundance of N. dutertrei (and higher abundance of G. rubescens) during North Atlantic Heinrich events, the deglacial, the YD and the mid- to late-Holocene reflect reduced influx of fresh water as a result of weakened summer monsoon freshwater input. The timing of these Andaman Sea monsoonal changes indicate a strong teleconnection to North Atlantic climate change. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68562
Appears in Collections: 过去全球变化的重建
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作者单位: CSIR-National Institute of Oceanography, Dona Paula Goa, India; Department of PG Studies and Research in Geology, Govt. College Kasaragod, Kerala, India; Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States
Recommended Citation:
Sijinkumar A.V.,Nagender Nath B.,Clemens S.. North Atlantic climatic changes reflected in the Late Quaternary foraminiferal abundance record of the Andaman Sea, north-eastern Indian Ocean[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,446