A persistent northern boundary of Indian Summer Monsoon precipitation over Central Asia during the Holocene

Ramisch, Arne; Lockot, Gregori; Haberzettl, Torsten; Hartmann, Kai; Kühn, Gerhard; Lehmkuhl, Frank; Schimpf, Stefan; Schulte, Philipp; Stauch, Georg; Wang, Rong; Wünnemann, Bernd; Yan, Dada; Zhang, Yongzhan; Diekmann, Bernhard

doi:10.1038/srep25791

Cited by 73 publications

(36 citation statements)

References 35 publications

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“…; Ramisch et al . ). The PSV of the Tangra Yumco record is in good agreement with the Lake Baikal record, the East Asian PSV stack and the geomagnetic field model for the past 15.9 cal.…”

Section: Chronologymentioning

confidence: 97%

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Synchronous pattern of moisture availability on the southern Tibetan Plateau since 17.5 cal. ka BP – the Tangra Yumco lake sediment record

Ahlborn

Haberzettl

Wang

et al. 2016

Boreas

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A possible asynchronicity of the spatial and temporal moisture availability on the Tibetan Plateau has been a controversial subject of discussion in recent years. Here we present the first attempt to systematically investigate possible spatial and temporal variations in moisture availability by examining two lakes, Tangra Yumco and Nam Co, on an east–west transect on the southern Tibetan Plateau using identical proxies for palaeoenvironmental reconstruction. In this study, an independent record from Tangra Yumco was analysed applying a multi‐proxy approach to reconstruct variations in moisture availability since the Lateglacial. Results were subsequently compared with previously published records from Nam Co and additional records from Tso Moriri (northwestern Himalaya) and Naleng Co (southeastern Tibetan Plateau). Our results show that Tangra Yumco was at least partially ice covered prior to 17.1 cal. ka BP. A temperature rise after 17.1 cal. ka BP probably resulted in thawing of the permafrost. At 16.0 cal. ka BP moisture availability increased, representing an initial monsoonal intensification. Warmer conditions between 13.0 and 12.4 cal. ka BP and cooler conditions between 12.4 cal. ka BP and the onset of the Holocene reflect the Bølling‐Allerød and Younger Dryas. At the onset of the Holocene moisture availability rapidly increased, with moisture highest prior to 8.5 cal. ka BP when temperatures were also highest. After 8.5 cal. ka BP the moisture availability gradually decreased and showed only minor amplitude variations. These findings are consistent with the records from large lakes like Nam Co, Tso Moriri, and Naleng Co, revealing a synchronous pattern of moisture availability on the southern Tibetan Plateau.

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“…; Ramisch et al . ). The PSV of the Tangra Yumco record is in good agreement with the Lake Baikal record, the East Asian PSV stack and the geomagnetic field model for the past 15.9 cal.…”

Section: Chronologymentioning

confidence: 97%

“…() and Ramisch et al . () suggested the varying position of the northern monsoon limit as a possible cause for the spatial asynchronicity. Mischke et al .…”

mentioning

confidence: 99%

Synchronous pattern of moisture availability on the southern Tibetan Plateau since 17.5 cal. ka BP – the Tangra Yumco lake sediment record

Ahlborn

Haberzettl

Wang

et al. 2016

Boreas

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“…This result challenges the above notion and supports the hypothesis of a time‐varying boundary of the monsoonal precipitation across the plateau (Ramisch et al . ).…”

Section: Discussionmentioning

confidence: 97%

“…Lake‐level fluctuations during the Holocene were generally in accordance with moisture variations in the marginal monsoon zones of inland China (Ramisch et al . ). Three radiocarbon ages of 7.50–7.95 cal.…”

Section: Elevated Shore Featuresmentioning

confidence: 97%

Late‐Quaternary history of ‘great lakes’ on the Tibetan Plateau and palaeoclimatic implications – A review

Colman

Lai

2018

Boreas

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Geomorphic evidence suggests that shorelines of 100–200 m above the modern lake levels were common across the Tibetan Plateau during late Marine Isotope Stage (MIS) 3. The timing of this lake‐level highstand is mainly based on radiocarbon ages. Problems surrounding the ages of lacustrine sediments at or beyond the limit of the radiocarbon‐dating method have created a need for alternative geochronometers. Chronological advances during the last decade have renewed interest in the timing of events beyond the limit of radiocarbon dating. Here, we synthesize published data for elevated lacustrine landforms of 48 lakes on the Tibetan Plateau, in order to provide a thorough perspective on the timing and pattern of lake‐level changes in this alpine area during the late Quaternary. The ages of these elevated shore features reveal a long‐term trend of relative lake‐level fall from at least MIS 5, instead of a peak in MIS 3, as previously thought. Dating lacustrine terrace sequences reveals that the rate of lake‐level fall ranged from ~1 to 3 mm a−1, comparable with that of related river downcutting across the plateau. Palaeoclimatic proxy records point to a sustained drying since the Last Interglacial, suggesting that long‐term aridification might be the culprit for this widespread and progressive lake‐level fall.

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“…So far, several factors have been considered: (1) the pulling effect of the TP as a function of the land-sea thermal gradient in combination with the high-altitude heat source [Molnar et al, 2010;Wu et al, 2012], (2) the blocking effect of the TP and its marginal orography [Shi et al, 2017], and (3) the impeding effect of the WS [Boos and Kuang, 2010;Wu et al, 2012]. The Kunlun barrier (~36°N) is suggested to have been a persistent northern boundary of IM precipitation during the Holocene [Ramisch et al, 2016], whereas modern observations reveal that the current northern boundary of the IM is the Tanggula range (32-33°N) [Tian et al, 2001;Morrill et al, 2003]. In the last millennium, the IM was weakened and its northward incursion was reduced after~1400 A.D. in association with the onset of the LIA and a decrease in insolation [Kaspari et al, 2007].…”

mentioning

confidence: 99%

Rapid northward shift of the Indian Monsoon on the Tibetan Plateau at the end of the Little Ice Age

Zhang

Günther

et al. 2017

JGR Atmospheres

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Variations in the Indian Monsoon (IM) and Westerlies (WS) significantly affect the climate on the Tibetan Plateau (TP) and have widespread ecological and socioeconomic impacts on the whole of Asian society. So far, however, the rate and magnitude of changes in the IM have still remained unclear. Here we report for the first time that the IM rapidly shifted northward at the end of the Little Ice Age (LIA). We used sediment proxies for humidity and moisture sources from the Taro Co Lake, which is located in the transition zone between the WS and IM. Our comprehensive survey of climate records for the TP and its peripheral mountain ranges revealed that the northern boundary of the IM (i.e., the southern boundary of the WS) lay along the southern slope of the Gandise Range (~29.5°N) in the late LIA. In contrast, it passed quickly over the Gandise Range by at least 1.5° in latitude at the end of the LIA. Our results suggest that this rapid climatic shift was potentially triggered by the counteracting effects of blocking by the TP and its marginal orography, which hindered the northward movement of the IM, and the pulling thermal gradient of the TP.

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A persistent northern boundary of Indian Summer Monsoon precipitation over Central Asia during the Holocene

Cited by 73 publications

References 35 publications

Synchronous pattern of moisture availability on the southern Tibetan Plateau since 17.5 cal. ka BP – the Tangra Yumco lake sediment record

Synchronous pattern of moisture availability on the southern Tibetan Plateau since 17.5 cal. ka BP – the Tangra Yumco lake sediment record

Late‐Quaternary history of ‘great lakes’ on the Tibetan Plateau and palaeoclimatic implications – A review

Rapid northward shift of the Indian Monsoon on the Tibetan Plateau at the end of the Little Ice Age

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