Environmental history recorded over the last 70 years in Biển Hồ maar sediment, Central Highlands of Vietnam

Nguyễn-Văn, Hướng; Schimmelmann, Jan P.; Nguyễn-Thùy, Dương; Ojala, Antti E. K.; Unkel, Ingmar; Nguyễn-Đình, Thái; Fukumoto, Yasuhide; Doiron, Kelsey; Sauer, Peter E.; Drobniak, Agnieszka; Nguyen, Nuong Thi Kieu; Đỗ-Trọng, Quốc; Nguyễn-Thị, Hồng; Nguyễn-Ánh, Dương; Nguyễn-Văn, Tạo; Schimmelmann, Arndt

doi:10.1016/j.quaint.2020.05.013

Cited by 9 publications

(4 citation statements)

References 61 publications

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“…The changes cannot be attributed to the dam construction at Krong No River which started some 100 years later in 2003 CE. Twentieth century human impact in the Ea Tyn catchment through land use changes should also be weaker than recorded at the much larger Bien Ho Lake (Nguyễn-Văn et al, 2022). Ea Tyn Lake is part of the Nam Kar Nature Reserve and the mountains south and north of the lake are covered by dense secondary tropical rain forest.…”

Section: Discussionmentioning

confidence: 93%

“…Several recent studies of paleoclimatic changes across Southeast Asia used tree-rings (An et al, 2012; Buckley et al, 2010; Sano et al, 2009), speleothems (Sinha et al, 2011; Zhao et al, 2015), and lake sediments (Chawchai et al, 2013; Chen et al, 2009; Ling et al, 2018). With two exceptions published only recently (Nguyễn-Văn et al, 2022; Stevens et al, 2018), there are hardly any paleoclimatic records available from lakes in Việt Nam. Paleolimnological archives can provide insight on the variability of Asian monsoon strength and intensity over time, despite spatial regional differences in monsoonal rainfall, dissimilar types of preserved paleoclimatic proxies, and various approaches to dating.…”

Section: Introductionmentioning

confidence: 99%

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A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam

et al. 2022

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An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions from global climate change. The Southeast Asian tropics remain severely under-represented in paleoenvironmental and paleoclimatic reconstructions, although a few recent paleoclimate studies evaluated the variability, position and strength of the main Asian monsoon systems at different timescales from modern records to the last 15,000 years. Comparable data from Việt Nam, however, are scarce although Việt Nam and its Central Highlands are critically located at the intersection of the East Asian Summer Monsoon and the Indian Summer Monsoon with highly important socio-ecological consequences from changes in the climate system. This study presents a high-resolution sedimentary climate record from Ea Tyn Lake in Việt Nam’s Central Highlands covering the last 1250 years. Using geochemical and sedimentological proxies and principal component analysis, we reconstructed at least 12 drought events, some of which appear to be of supraregional significance as they coincide with historically documented droughts in India, China, and Cambodia. Beyond tracking short-term climate events, the Rb/Sr elemental ratio along the Ea Tyn Lake sediment sequence reflects long-term monsoon variability throughout the last millenium, which was previously only reconstructed via δ18O speleothem records from China and India. Our Ea Tyn Lake record shows that the East Asian Summer Monsoon was relatively strong between ~1000 and 1350 cal CE and weaker between 1350 and 1850 cal CE, followed by renewed intensification after ~1850 cal CE.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam

et al. 2022

Self Cite

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“…In terms of global distribution, AG is more widely distributed in tropical and subtropical regions (Davies et al., 2002; Kilham et al., 1986; Lewis, 1978; Nardelli et al., 2016; Nguyễn‐Văn et al., 2022; Pilskaln & Johnson, 1991; Wang et al., 2008, 2012). For example, the Biển Hồ Lake in tropical Vietnam has only AG and almost no AA (Nguyễn‐Văn et al., 2022). By contrast, AA is more abundant in temperate, high‐latitude lakes (Bradbury, 1988; Dean et al., 1984; Kauppila et al., 2002; Poister et al., 2012; Siver & Kling, 1997).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Meltwater Pulse1A Triggered an Extreme Cooling Event: Evidence From Southern China

Wang

Hao

Zhang

et al. 2022

Paleoceanog and Paleoclimatol

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Meltwater Pulse 1A injection into the North Atlantic coincided with the Bølling warming event, despite climate model simulations indicating that the Meltwater Pulse 1A should have inevitably lead to an extreme cooling in the northern hemisphere. However, so far no cooling event has been found in paleoclimate records responding to Meltwater Pulse 1A. Here we reconstruct winter temperature based on sedimentary diatoms from Huguangyan Maar Lake in tropical China. The results show that winter temperature dropped by at least 6°C within ∼100 years at 14.8 ± 0.02 ka BP, coeval with the onset of Meltwater Pulse 1A, within dating uncertainty. We argue that Meltwater Pulse 1A weakened the Atlantic Meridional Overturning Circulation (AMOC), resulting in abrupt severe cooling in the Northern Hemisphere that caused a severe winter temperature drop in East Asia by strengthening the winter monsoon. We propose that extreme cooling in winter temperature triggered the Bølling warming by stopping the freshwater release from the ice‐sheet, triggering the AMOC to recover quickly and causing the Bølling event as an overshoot under gradual forcing.

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Lake Sediments and Climate Studies

Mishra

2023

The Application of Lake Sediments for Climate Studies

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Environmental history recorded over the last 70 years in Biển Hồ maar sediment, Central Highlands of Vietnam

Cited by 9 publications

References 61 publications

A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam

A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam

Meltwater Pulse1A Triggered an Extreme Cooling Event: Evidence From Southern China

Lake Sediments and Climate Studies

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