On the glacial-interglacial variability of the Asian monsoon in speleothem δ18O records.
Guangxin Liu,Xianglei Li,Hong-Wei Chiang,Hai Cheng,Shufang Yuan,Sakonvan Chawchai,Shaoneng He,Yanbin Lu,Lin Thu Aung,Phyo Maung Maung,W N Tun,Kyaw Moe Oo,Xianfeng Wang +12 more
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TLDR
It is found that the records close to the monsoon moisture source show large glacial-interglacial variability, which then decreases landward, the moisture transport pathway effect, which counteracts the forcing of glacial boundary conditions.Abstract:
While Asian monsoon (AM) changes have been clearly captured in Chinese speleothem oxygen isotope (δ18O) records, the lack of glacial-interglacial variability in the records remains puzzling. Here, we report speleothem δ18O records from three locations along the trajectory of the Indian summer monsoon (ISM), a major branch of the AM, and characterize AM rainfall over the past 180,000 years. We have found that the records close to the monsoon moisture source show large glacial-interglacial variability, which then decreases landward. These changes likely reflect a stronger oxygen isotope fractionation associated with progressive rainout of AM moisture during glacial periods, possibly due to a larger temperature gradient and suppressed plant transpiration. We term this effect, which counteracts the forcing of glacial boundary conditions, the moisture transport pathway effect.read more
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Orbital-scale Asian summer monsoon variations: Paradox and exploration
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Significant influence of Northern Hemisphere high latitude climate on appeared precession rhythm of East Asian summer monsoon after Mid-Brunhes Transition interglacials recorded in the Chinese loess
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Journal ArticleDOI
Penultimate deglaciation Asian monsoon response to North Atlantic circulation collapse
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References
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TL;DR: A new long speleothem δ18O time series from Xiaobailong cave in southwest China characterizes changes in a major branch of Indian summer monsoon precipitation over the last 252 kyrs, and shows clear glacial–interglacial variations that are consistent with marine and other terrestrial proxies but different from the cave records in East China.
Journal ArticleDOI
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Mahyar Mohtadi,Matthias Prange,Delia W Oppo,Ricardo De Pol-Holz,Ute Merkel,Xiao Zhang,Stephan Steinke,Andreas Lückge +7 more
TL;DR: It is shown that slowdowns of the Atlantic meridional overturning circulation during Heinrich stadials and the Younger Dryas stadial affected the tropical Indian Ocean hydroclimate through changes to the Hadley circulation including a southward shift in the rising branch (the intertropical convergence zone) and an overall weakening over the southern Indian Ocean.
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A Detailed 31,000-Year Record of Climate and Vegetation Change, from the Isotope Geochemistry of Two New Zealand Speleothems
TL;DR: Uranium-series dating and stable isotope analyses of two speleothems from northwest Nelson, New Zealand, record changes in regional climate and local forest extent over the past 31,000 years.
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TL;DR: Speleothem oxygen isotope (δ18O) data from Bittoo cave, Northern India is used to reconstruct ISM variability over the past 280,000 years, supporting the view that the tropical-subtropical monsoon variability is driven directly by precession-induced changes in NHSI.