Variations in monsoonal rainfall over the last 21 kyr inferred from sedimentary organic matter in Tung-Yuan Pond, southern Taiwan

Yang, Tsung-Yeh; Lee, Teh-Quei; Meyers, Philip A.; Song, Sheng-Rong; Kao, Shuh‐Ji; Löwemark, Ludvig; Chen, Rou-Fei; Chen, Huei-Fen; Wei, Kuo-Yen; Fan, Cheng-Wei; Shiau, Liang-­Jian; Chiang, Hong‐Wei; Chen, Yue‐Gau; Chen, Min‐Te

doi:10.1016/j.quascirev.2011.08.017

Cited by 41 publications

(23 citation statements)

References 65 publications

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“…A shift to more arid conditions around 4000 a BP is also found in proxy records from the Indus Delta and from other parts of north‐western India (Staubwassser et al ., 2003; Prasad & Enzel, 2006), while on the Tibetan Plateau, lacustrine evidence indicates the onset of much colder conditions at c. 4.0 ka BP (Mischke & Zhang, 2010). A weakening of the South Asian summer monsoon at ∼ 4 ka BP is reflected in marine records from the Arabian Seas (Gupta et al ., 2003), while the 4.2 event also registers as a weak monsoon event in speleothem records from Dongge Cave in southern China (Wang et al ., 2005) and Mawmluh Cave in north‐east India (Berkelhammer et al ., 2012), while in Taiwan an increase in palaeoprecipitation, reflecting a strengthening of the East Asia summer monsoon, begins about 4.2 ka BP (Yang et al ., 2011). …”

Section: A Proposal For a Formal Subdivision Of The Holocenementioning

confidence: 99%

Formal subdivision of the Holocene Series/Epoch: a Discussion Paper by a Working Group of INTIMATE (Integration of ice‐core, marine and terrestrial records) and the Subcommission on Quaternary Stratigraphy (International Commission on Stratigraphy)

Walker

Berkelhammer

Björck

et al. 2012

J Quaternary Science

745

537

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This discussion paper, by a Working Group of INTIMATE (Integration of ice‐core, marine and terrestrial records) and the Subcommision on Quaternary Stratigraphy (SQS) of the International Commission on Stratigraphy (ICS), considers the prospects for a formal subdivision of the Holocene Series/Epoch. Although previous attempts to subdivide the Holocene have proved inconclusive, recent developments in Quaternary stratigraphy, notably the definition of the Pleistocene–Holocene boundary and the emergence of formal subdivisions of the Pleistocene Series/Epoch, mean that it may be timely to revisit this matter. The Quaternary literature reveals a widespread but variable informal usage of a tripartite division of the Holocene (‘early’, ‘middle’ or ‘mid’, and ‘late’), and we argue that this de facto subdivision should now be formalized to ensure consistency in stratigraphic terminology. We propose an Early–Middle Holocene Boundary at 8200 a BP and a Middle–Late Holocene Boundary at 4200 a BP, each of which is linked to a Global Stratotype Section and Point (GSSP). Should the proposal find a broad measure of support from the Quaternary community, a submission will be made to the International Union of Geological Sciences (IUGS), via the SQS and the ICS, for formal ratification of this subdivision of the Holocene Series/Epoch. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: A Proposal For a Formal Subdivision Of The Holocenementioning

confidence: 99%

Formal subdivision of the Holocene Series/Epoch: a Discussion Paper by a Working Group of INTIMATE (Integration of ice‐core, marine and terrestrial records) and the Subcommission on Quaternary Stratigraphy (International Commission on Stratigraphy)

Walker

Berkelhammer

Björck

et al. 2012

J Quaternary Science

745

537

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“…Abundant wood debris was also observed in this specific time period28. The TC variation was mainly attributed to the fluctuation of the organic matter input from the catchment reflecting the East Asian summer monsoon rainfall variation2829.…”

Section: Resultsmentioning

confidence: 71%

“…The lithological composition of the core consists of alternating layers of grey-green or dark brown muds and dark grey muds containing amounts of vascular plants which have been described previously28. The chronology of the entire core was established previously with 16 AMS 14 C on organic materials of plant debris29. Later, we added 12 more radiocarbon dates specifically for the period of the last deglaciation and the early Holocene to obtain a better chronology28.…”

Section: Methodsmentioning

confidence: 99%

Sulfur Geochemistry of a Lacustrine Record from Taiwan Reveals Enhanced Marine Aerosol Input during the Early Holocene

Ding

Zheng

et al. 2016

Sci Rep

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Lacustrine record of marine aerosol input has rarely been documented. Here, we present the sulfur geochemistry during the last deglaciation and early Holocene of a sediment core retrieved from the Dongyuan Lake in southern Taiwan. An unusually high sulfur peak accompanying pyrite presence is observed at 10.5 ka BP. Such high sulfur content in lacustrine record is unusual. The δ34S of sulfur varied from +9.5 to + 17.1‰ with two significant positive shifts at 10.5 and 9.4 ka BP. The sources of sulfur and potential processes involving the sulfur isotope variation including bacterial sulfate reduction, volcanic emissions, in-catchment sulfide oxidation and marine aerosol input are discussed. Enhanced marine aerosol input is the most likely explanation for such sulfur peaks and δ34S shifts. The positive δ34S shifts appeared concurrently with the maximum landslide events over Taiwan resulted from enhanced typhoon activities. The synchronicity among records suggests that increased typhoon activities promoted sea spray, and consequently enhanced the marine aerosol input with 34S-enriched sulfate. Our sulfur geochemistry data revealed sea spray history and marine influence onto terrestrial environment at coastal regions. Wider coverage of spatial-temporal lacustrine sulfur geochemistry record is needed to validate the applicability of sulfur proxy in paleoenvironmental research.

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“…Samples for total organic carbon (TOC) and total nitrogen (TN) were analyzed at the Department of Earth and Life Science, University of Taipei, following the procedures described in Yang et al (2011b). In brief, each freeze-dried sample was pretreated with 1 N HCl to remove carbonate, then washed with deionized water and dried in an oven at 60 • C. The samples were then wrapped in a tin capsule and combusted using a ThermoQuest EA1110 elemental analyzer to measure the TOC and TN, and thus the atomic ratio of TOC/TN.…”

Section: Multiproxy Sediment Core Analysesmentioning

confidence: 99%

“…However, the rapid uplift, steep topography, and high erosion rates up to 3-6 mm yr −1 in Taiwan (Dadson et al, 2003) make it difficult to study historical humanenvironment interactions. Therefore, in Taiwan, millennial to centennial-scale climatic oscillations have only been studied through palynological and geochemical proxies from a limited number of lakes (Wang et al, 2011;Yang et al, 2011bYang et al, , 2014Chen et al, 2012;Liew et al, 2014), and even fewer studies have been conducted on human-environment interactions on historical/archaeological time scales due to the scarcity of high resolution material (Lin et al, 2007;Yang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Disentangling Natural and Anthropogenic Signals in Lacustrine Records: An Example from the Ilan Plain, NE Taiwan

et al. 2016

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The impact of human activities has been increasing to a degree where humans now outcompete many natural processes. When interpreting environmental and climatic changes recorded in natural archives on historical time scales, it is therefore important to be able to disentangle the relative contribution of natural and anthropogenic processes. Lake Meihua on the Ilan Plain in northeastern Taiwan offers a particularly suitable opportunity to test how human activities known from historical records can be recorded in lacustrine sediment. For this purpose, three cores from Lake Meihua have been studied by a multiproxy approach, providing the first decadal-resolution lacustrine records covering the past 150 years in Taiwan. Profiles of excess 210 Pb, 137 Cs and 239,240 Pu from two short cores (MHL-09-01 and MHL-11-02) allowed a precise chronology to be established. The presence of a yellow, earthy layer with lower levels of organic material coincide with the record of land development associated with the construction of the San-Chin-Gong Temple during AD 1970AD -1982. Furthermore, in the lower part of the cores, the upwards increasing trend of inc/coh, TOC, TOC/TN, and grain size, coupled with the palynological data (increase of Alnus, Mallotus, Trema and herbs) from the nearby core MHL-5A with radiocarbon chronology, suggest that the area surrounding the lake has been significantly affected by agricultural activities since the arrival of Chinese settlers around ∼AD 1874. In sum, this study demonstrates that this suite of lacustrine sediments in northeastern Taiwan has recorded human activities in agreement with historical documents, and that different human activities will leave distinct sedimentological, geochemical, and palynological signatures in the sedimentary archives. Therefore, multiproxy reconstructions are important to capture the complex nature of human-environmental interactions. A better understanding of the weathering and erosion response to human activities can also provide useful information for sustainable land-use management.

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Variations in monsoonal rainfall over the last 21 kyr inferred from sedimentary organic matter in Tung-Yuan Pond, southern Taiwan

Cited by 41 publications

References 65 publications

Formal subdivision of the Holocene Series/Epoch: a Discussion Paper by a Working Group of INTIMATE (Integration of ice‐core, marine and terrestrial records) and the Subcommission on Quaternary Stratigraphy (International Commission on Stratigraphy)

Formal subdivision of the Holocene Series/Epoch: a Discussion Paper by a Working Group of INTIMATE (Integration of ice‐core, marine and terrestrial records) and the Subcommission on Quaternary Stratigraphy (International Commission on Stratigraphy)

Sulfur Geochemistry of a Lacustrine Record from Taiwan Reveals Enhanced Marine Aerosol Input during the Early Holocene

Disentangling Natural and Anthropogenic Signals in Lacustrine Records: An Example from the Ilan Plain, NE Taiwan

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