Paleoprecipitation variations from LGM to early-middle Holocene on the southeastern Chinese Loess Plateau: evidence from land snail shells δ13C

IF 3.2 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL Quaternary Science Reviews Pub Date : 2025-03-13 DOI:10.1016/j.quascirev.2025.109312
Ya-na Jia , Hong Yan , Jibao Dong , Xiulan Zong , Guozhen Wang , Chengcheng Liu , Qian Zhang , Fan Luo , John Dodson
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Abstract

Here, we present stable carbon isotope of high-resolution fossil snail shell (δ13Cs) and soil organic matter (δ13Corg) from the Lingbao area on the southeastern Chinese Loess Plateau (CLP). Our results show that land snails have a dietary preference for C3 plants which have dominated the studied area since 19 ka. Thus, their shell δ13Cs could be used to investigate the δ13C variations of C3 plants and precipitation changes. The highest δ13Cs values with the smallest standard deviation (SD) reflect the intense water stress experienced by C3 plants during the Last Glacial Maximum (LGM). In the last deglaciation, the δ13Cs values decreased gradually, indicating increased East Asian summer monsoon (EASM) precipitation. The lowest δ13Cs values occurred in the early-middle Holocene, suggesting that abundant precipitation enhanced favorable conditions for C3 plants. Thereafter, the δ13Cs values increased again, which may be linked to elevated water stress for C3 plants in the mid-late Holocene. Altogether, our study implied that there is a ∼300 mm mean increase of precipitation from the LGM to the early-middle Holocene on the southern CLP. Notably, the deglacial warming preceded the onset of EASM precipitation increase by ∼2 ka, as indicated by the fossil snail count and their δ13Cs values, and this decoupled phenomenon is more robust and convincing compared with previous work, because it is derived from the exact same geological archive.
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来源期刊
Quaternary Science Reviews
Quaternary Science Reviews 地学-地球科学综合
CiteScore
7.50
自引率
15.00%
发文量
388
审稿时长
3 months
期刊介绍: Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.
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