干旱区生态环境知识资源中心(Arid): Mid-Late Holocene Sub-Millennial Scale Inverse Trends of South Asian Summer and Winter Monsoons in Sri Lanka

Arid

DOI	10.3389/feart.2021.789291
	Mid-Late Holocene Sub-Millennial Scale Inverse Trends of South Asian Summer and Winter Monsoons in Sri Lanka
	Gayantha, Kasun; Roberts, Patrick; Routh, Joyanto; Wedage, Oshan; Ott, Florian; Frenzel, Peter; Chandrajith, Rohana; Gleixner, Gerd
通讯作者	Gleixner, G (corresponding author)，Max Planck Inst Biogeochem, Dept Biogeochem Proc, Jena, Germany.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2021
卷号	9
英文摘要	The South Asian Monsoon (SAM) brings precipitation crucial for agriculture across the densely populated region of South Asia. Identifying the key long-term drivers of the SAM is essential to improve the predictability of future monsoonal trends in the context of current global climate scenarios and increasingly frequent drought and flooding events in this part of the world. Here, we reconstruct similar to 6000 years of climatic and environmental history of the South Asian summer monsoon-fed Bolgoda South Lake and the Horton Plains, and the winter monsoon-fed Panama lagoon, in Sri Lanka to better understand monsoonal operation over this island and its connection to broader climate systems. Multiple proxies (diagnostic biomarkers, hydrogen and carbon isotopes of individual n-alkane, grain size, and Zr/Rb elemental ratio) indicate a sub-millennial scale decreasing trend of summer monsoon rainfall in the wet zone of Sri Lanka alongside an increasing trend of winter monsoon rainfall in the dry zone during the last similar to 6000 years. We also observed multi-centennial scale arid events in the Bolgoda South Lake and Horton Plains records at similar to 3,500 and similar to 1,000 cal years BP. Inverse monsoonal behavior during the mid- and late Holocene seems to be led by the southward migration of the mean latitudinal position of ITCZ, induced by varying solar energy distribution between the Northern and Southern hemispheres due to Earth's processional cycle. Our observations are broadly supported by existing paleoclimatic records from the Indian sub-continent, but abrupt arid phases are asynchronous in the regional records. In addition, these short-term arid conditions do not show systematic correlations with the different modes of climate variables known to have teleconnections with the Indian Ocean monsoon.
英文关键词	paleoclimate Indian Ocean Monsoon ITCZ South Asia biomarker compound specific isotopes analysis XRF microfauna
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000745272200001
WOS关键词	MULTI-PROXY RECONSTRUCTION ; ENVIRONMENTAL-CHANGES ; NORTHEAST MONSOON ; SURFACE SEDIMENTS ; LATE QUATERNARY ; LAKE-SEDIMENTS ; HORTON PLAINS ; CLIMATE ; VARIABILITY ; DYNAMICS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375675
作者单位	[Gayantha, Kasun; Gleixner, Gerd] Max Planck Inst Biogeochem, Dept Biogeochem Proc, Jena, Germany; [Roberts, Patrick; Wedage, Oshan; Ott, Florian] Max Planck Inst Sci Human Hist, Dept Archaeol, Jena, Germany; [Routh, Joyanto] Linkoping Univ, Dept Themat Studies Environm Change, Linkoping, Sweden; [Wedage, Oshan] Univ Sri Jayewardenepura, Dept Hist & Archaeol, Gangodawila, Sri Lanka; [Ott, Florian] GFZ German Res Ctr Geosci, Sect Climate Dynam & Landscape Evolut 5 2, Potsdam, Germany; [Frenzel, Peter] Friedrich Schiller Univ, Inst Earth Sci, Jena, Germany; [Chandrajith, Rohana] Univ Peradeniya, Dept Geol, Fac Sci, Peradeniya, Sri Lanka
推荐引用方式 GB/T 7714	Gayantha, Kasun,Roberts, Patrick,Routh, Joyanto,et al. Mid-Late Holocene Sub-Millennial Scale Inverse Trends of South Asian Summer and Winter Monsoons in Sri Lanka[J],2021,9.
APA	Gayantha, Kasun.,Roberts, Patrick.,Routh, Joyanto.,Wedage, Oshan.,Ott, Florian.,...&Gleixner, Gerd.(2021).Mid-Late Holocene Sub-Millennial Scale Inverse Trends of South Asian Summer and Winter Monsoons in Sri Lanka.FRONTIERS IN EARTH SCIENCE,9.
MLA	Gayantha, Kasun,et al."Mid-Late Holocene Sub-Millennial Scale Inverse Trends of South Asian Summer and Winter Monsoons in Sri Lanka".FRONTIERS IN EARTH SCIENCE 9(2021).