Glacial-interglacial evolution of seasonal cooling events documented by land-snail eggs from Chinese loess

Li, Fengjiang; Wu, Naiqin; Zhang, Dan; Rousseau, Denis‐Didier; Yang, Yiquan; Hao, Qingzhen; Dong, Yajie; Lü, Houyuan

doi:10.1016/j.quascirev.2022.107506

Cited by 7 publications

(16 citation statements)

References 60 publications

(130 reference statements)

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“…Therefore, changes in egg abundance in the Huining section during MIS 12–10 would have documented seasonal cooling events. This is consistent with both biological principles 6 and the studies of the past 350-kyr eggs 7 , 9 .…”

Section: Discussionsupporting

confidence: 87%

“…Soil development is the main factor impacting carbonate content 4 , 5 , 14 and therefore egg preservation 8 , 9 . In the CLP, high content of carbonate is generally associated with weak development of soils, and vice versa 4 , 14 .…”

Section: Discussionmentioning

confidence: 99%

“…Nearly all oviparous species have temperature thresholds for egg hatching 7 . When these thresholds are exceeded, abundant eggs fail to hatch 7 – 9 , 12 , 13 and are likely preserved in surface soils. Indeed, surface-soil study has indicated that the highest abundance in modern land-snail eggs occurs in all the samples taken from the region with the strongest cold spells and the lowest spring minimum temperatures 7 .…”

Section: Discussionmentioning

confidence: 99%

“…Fossil land-snail eggs are abundant in loess-paleosol sequences of the CLP 8 , 9 . The loess (L) and paleosol (S) units are well correlated with even and odd stages of MIS record, respectively, which documents glacial-interglacial cycles 3 , 5 , 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

“…The Huining loess-paleosol sequence (36°14′N, 105°09′E) is located in the western CLP (Fig. 1 ) where paleosols are weakly developed 10 and thus favor the preservation of land-snail eggs 9 . Here, seasonal cooling events were investigated for MIS 12–10, using well-preserved land-snail eggs from the Huining section.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal climatic instability in the western Chinese Loess Plateau during Marine Isotope Stages 12–10

Dong

et al. 2023

Sci Rep

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Because of similar astronomical background, Marine Isotope Stage (MIS) 11 is viewed as an analogue of the Holocene, but the evolution of seasonal climatic instability during MIS 11 has not been well investigated. Here we present a time series of land-snail eggs—a recently-developed proxy of seasonal cooling events—from the Chinese Loess Plateau (CLP) to investigate seasonal climatic instability during MIS 11 and adjacent glacials. Due to the impact of low temperatures on egg hatching, egg-abundance peaks document seasonal cooling events. A total of five egg-abundance peaks were recorded in the CLP during MIS 12, MIS 11 and MIS 10. Three peaks are strong and occur close to glacial inception or interglacial-to-glacial transition; two weaker peaks occur during MIS11. These peaks imply seasonal climatic instability intensifies mainly during glacial initiation or transition. All these events correspond to ice-sheet growth and the loss of ice-rafted debris at high northern latitudes. Moreover, they occurred at the minima of local spring insolation during the MIS 12 and MIS 10 glacials, but at the maxima during the MIS 11 interglacial. This may contribute to the difference in the intensity of seasonal cooling events between low-eccentricity glacials and interglacials. Our results provide new evidence for understanding low-eccentricity interglacial–glacial evolution.

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Section: Discussionsupporting

confidence: 87%