干旱区生态环境知识资源中心(Arid): How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary?

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DOI	10.1016/j.polar.2021.100636
	How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary?
	Warrier, Anish Kumar; Mahesh, B. S.; Sebastian, Joju George; Mohan, Rahul
通讯作者	Warrier, AK (corresponding author), Manipal Acad Higher Educ, Manipal Inst Technol, Dept Civil Engn, Manipal 576104, Karnataka, India.
来源期刊	POLAR SCIENCE
ISSN	1873-9652
EISSN	1876-4428
出版年	2021
卷号	30
英文摘要	We compare the sediment magnetic properties of two lakes in Schirmacher Oasis, East Antarctica and discuss the intensity of pedogenesis during the Late Quaternary. The magnetic minerals are land-derived with no obliteration of the signal due to bacterial or anthropogenic sources. The magnetic grains of Lake L-49 are much smaller in size compared to Lake Sandy's (low ratio values of IRM20mT/ARM and S-20). The iron oxide minerals in Lake Sandy's sediments are coarse stable single domain (SSD) and multi-domain (MD) grains with the SSD concentration increasing during the Holocene. Percentage frequency-dependent susceptibility, a marker for pedogenic iron oxide minerals shows a similar trend for Lake Sandy, with the values remaining low during the Last Glacial Stage (LGS) and increasing towards the Holocene. Such a pattern is not observed in the sediments of Lake L-49. Principal Component Analysis reveals a relatively stronger intensity of pedogenesis in the Lake Sandy catchment during the deglaciation. From the data, we observe that even though pedogenesis is active, the intensity is not strong enough to form superparamagnetic (SP) grains. The peaks in chi(fd) for both the lakes show a direct relationship with Antarctic Isotope Maximum events recorded in an ice-core data suggesting that chi(fd) can be used as a proxy for paleo-pedogenesis in Antarctica.
英文关键词	Iron oxides Magnetic grain size Pedogenesis Environmental magnetism Schirmacher oasis East Antarctica
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000729935500004
WOS关键词	PRINCIPAL-COMPONENTS-ANALYSIS ; MAGNETIC-PROPERTIES ; EAST ANTARCTICA ; LAKE ; SOIL ; SEDIMENTS ; CLIMATE ; SURFACE ; VARIABILITY ; CALIBRATION
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374000
作者单位	[Warrier, Anish Kumar; Sebastian, Joju George] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Civil Engn, Manipal 576104, Karnataka, India; [Warrier, Anish Kumar] Manipal Acad Higher Educ, Ctr Climate Studies, Manipal 576104, Karnataka, India; [Mahesh, B. S.; Mohan, Rahul] Minist Earth Sci, Natl Ctr Polar & Ocean Res, Vasco Da Gama 403804, Goa, India
推荐引用方式 GB/T 7714	Warrier, Anish Kumar,Mahesh, B. S.,Sebastian, Joju George,et al. How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary?[J],2021,30.
APA	Warrier, Anish Kumar,Mahesh, B. S.,Sebastian, Joju George,&Mohan, Rahul.(2021).How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary?.POLAR SCIENCE,30.
MLA	Warrier, Anish Kumar,et al."How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary?".POLAR SCIENCE 30(2021).