High-resolution δ18O and δ13C records during the past 65 ka from Fengyu Cave in Guilin: Variation of monsoonal climates in south China

Hong Chun Li*, Miryam Bar-Matthews, Yuan Ping Chang, Avner Ayalon, Dao Xian Yuan, Mei Liang Zhang, Mahjoor Ahmad Lone

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The δ18O and δ13C records of a 230Th/U dated, 2.2-m long stalagmite from Fengyu Cave in south China provide a continuous decadal-resolution (with 3698 measurements) proxy for regional climatic and environmental conditions during 4–65 ka. This single stalagmite reveals all Heinrich cold events, most Dansgaard-Oeschger warm events, deglaciation and Holocene Optimum, generally supporting the Hulu and Dongge records. On 5000–10000 year time-scales, the δ18O and δ13C variations show strongly positive correlations (R = 0.7), reflecting that a common climatic factor controls both δ18O and δ13C of F-1. The comparison of the speleothem, ice core, insolation and marine records reveals strong linkages between N. Atlantic temperature and the Asian summer monsoon over most of the study period. However, there are some regional discrepancies between the stalagmite δ18O records following the deglaciation. Although the NH summer insolation provides the major forcing on Asian monsoon variability over orbital time-scales, the weakest summer monsoon intensity during the last glacial occurred ca. 16 ka corresponding to the Heinrich event 1; a 5–6 ky lag from the minimum insolation during the Last Glacial Maximum. Variations in the monsoonal climate of the study area over the past 700 years have been reconstructed from the δ18O and δ13C records of a 14.6-cm long stalagmite F4 in Fengyu cave, showing wet conditions between AD 1550 and AD 1850 (the Little Ice Age) and relatively dry conditions before and after this interval. Human impacts on local vegetation since AD 1700 were recorded by the δ13C record of stalagmite F4.

Original languageEnglish
Pages (from-to)117-128
Number of pages12
JournalQuaternary International
Volume441
Issue numberPart A
Early online date22 Sep 2016
DOIs
Publication statusPublished - 16 Jun 2017
Externally publishedYes

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