Extended duration of abrupt climate events from the early to late Holocene
(2025) Geophysical Research Letters — Vol. 52, n° 7, p. e2025GL115543 (2025)
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- Abstract
- Due to the lack of continuous annual records of Holocene climate events, their evolution remains unclear. In this study, we present a new annually resolved stalagmite oxygen isotope (δ18O) record covering the 4.2 ka event from the East Asian monsoon domain, and compare it with two annually resolved δ18O records of the 8.2 ka event and the Little Ice Age from the same stalagmite. These abrupt events share a similar asymmetric double-pulse structure, but exhibit extended event duration with less extreme climate excursion from the early to late Holocene. Climate simulations suggest that the changes in duration and frequency of the abrupt events could be related to the variations of East Asian summer monsoon and summer sea surface temperature in the North Atlantic. The waxing and waning of sea ice in the North Atlantic induced by Holocene summer insolation and atmosphere-ocean internal variability may contribute to differences in event duration.
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Citations
Liu, Y., Hu, C., Hu, Z., Liao, J., Liang, M., & Wu, Z. (2025). Extended duration of abrupt climate events from the early to late Holocene. Geophysical Research Letters, 52(7), e2025GL115543. https://doi.org/10.1029/2025GL115543 (Original work published 2025)