globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.10.035
论文题名:
Holocene strengthening of the Oxygen Minimum Zone in the northwestern Arabian Sea linked to changes in intermediate water circulation or Indian monsoon intensity?
作者: Das M.; Singh R.K.; Gupta A.K.; Bhaumik A.K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 483
起始页码: 125
结束页码: 135
语种: 英语
英文关键词: Arabian Sea ; Benthic foraminifera ; Holocene ; Indian monsoon ; Oxygen Minimum Zone (OMZ) ; Red Sea water (RSW)
英文摘要: A high resolution 14,000 year old record of benthic foraminifera from ODP Hole 723A was produced to understand changing intensity of the NW Arabian Sea Oxygen Minimum Zone (OMZ) and its links with intermediate water circulation and Indian Monsoon Intensity. During the latest Pleistocene, the OMZ was very weak marked by the abundance of oxic species. From early to mid Holocene period (up to 6500 years BP), intense SW monsoon-related high surface productivity led to the development of an OMZ in the Arabian Sea; however, presence of oxic and suboxic species indicate that OMZ intensification was minimized by cyclic incursions of oxygen-rich intermediate waters from the South. The middle Holocene was a transitional period to intense OMZ conditions. The intensification of the OMZ could be due to replacement of oxygen-rich southern source Sub-Antarctic Mode and Antarctic Intermediate Waters (SAMW-AAIW), with oxygen poor Red Sea Water (RSW) from the north during the middle Holocene. As the intensity of the summer monsoon weakened during the late Holocene (~ 4200 years BP onwards) the Arabian Sea OMZ intensified, suggesting total cut off from the oxygenated SAMW-AAIW. Spectral analysis of Information Function (H), benthic foraminifer Bolivina spp. and oxic species of benthic foraminifera indicate that the intensity of the OMZ and deep water conditions respond closely to solar cycles. © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67782
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geology and Geophysics, Indian Institute of Technology Kharagpur, India; School of Earth, Ocean and Climate Sciences, Indian Institute of Technology Bhubaneswar, India; Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad, India; Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun, India

Recommended Citation:
Das M.,Singh R.K.,Gupta A.K.,et al. Holocene strengthening of the Oxygen Minimum Zone in the northwestern Arabian Sea linked to changes in intermediate water circulation or Indian monsoon intensity?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,483
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