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Open AccessJournal ArticleDOI

On the glacial-interglacial variability of the Asian monsoon in speleothem δ18O records.

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.

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Citations
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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

TL;DR: In this paper, the authors presented a high-resolution EASM precipitation record reconstructed from the loess redness in North China over the past 720 kyr, showing that the average precipitation for interglacials is 420mm/yr, higher than present (~280 mm/yr).
Journal ArticleDOI

Penultimate deglaciation Asian monsoon response to North Atlantic circulation collapse

TL;DR: In this article, the authors quantitatively deconvolve these parameters affecting δ18OCc by applying three geochemical techniques in speleothems covering the penultimate glacial termination, and reveal that the different modes of the AMOC produced distinct impacts on the monsoon system.
References
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Journal ArticleDOI

Modelled atmospheric temperatures and global sea levels over the past million years

TL;DR: A coupled model of the Northern Hemisphere ice sheets and ocean temperatures, forced to match an oxygen isotope record for the past million years compiled from 57 globally distributed sediment cores, finds that during extreme glacial stages, air temperatures were 17.8 °C lower than present, with a 120 ± 10 m sea level equivalent of continental ice present.
Journal ArticleDOI

Quantification of Holocene Asian monsoon rainfall from spatially separated cave records

TL;DR: Wang et al. as mentioned in this paper presented a reconstruction of Holocene rainfall for southwest China by comparing a new high-resolution stalagmite δ 18 O record with an existing record from the same moisture transport pathway.
Journal ArticleDOI

The spectral distribution of solar radiation at the earth's surface—elements of a model

TL;DR: In this article, the attenuating properties of the atmosphere are presented in a form that permits the calculation of direct, diffuse and global spectral solar irradiance at ground level, using the extraterrestrial irradiance values of Thekaekara.
Journal ArticleDOI

Chinese stalagmite δ 18 O controlled by changes in the Indian monsoon during a simulated Heinrich event

TL;DR: In this paper, the authors used a numerical climate model with an embedded oxygen-isotope model to assess what caused the shifts in the oxygen isotope signature of precipitation during a climate perturbation designed to mimic a Heinrich event.
Journal ArticleDOI

Hydrologic connectivity constrains partitioning of global terrestrial water fluxes

TL;DR: Two large-scale flux-partitioning approaches were combined to quantify evapotranspiration subcomponents and the hydrologic connectivity of bound, plant-available soil waters with more mobile surface waters.
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