A5036693010- Geology and Paleoclimatology Research
- Karst Systems and Hydrogeology
- Archaeology and ancient environmental studies
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Groundwater and Isotope Geochemistry
- earthquake and tectonic studies
- Maritime and Coastal Archaeology
- Tree-ring climate responses
- Geophysics and Gravity Measurements
- Cryospheric studies and observations
- Climate variability and models
- Marine and environmental studies
- Pacific and Southeast Asian Studies
- Paleontology and Stratigraphy of Fossils
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies
- Remote Sensing and Land Use
- Coastal wetland ecosystem dynamics
- Soil and Environmental Studies
- Environmental Changes in China
- Geographic Information Systems Studies
- Microbial Community Ecology and Physiology
Xi'an Jiaotong University
2018-2025
Ministry of Housing and Urban-Rural Development
2022
Ministry of Natural Resources
2022
Beijing University of Civil Engineering and Architecture
2022
Chinese Academy of Geological Sciences
2022
Beijing Forestry University
2017
China Earthquake Administration
2004
Significance The Younger Dryas (YD) was an ∼1,300-y period of extreme climate that dramatically reversed the course global warming brought last Ice Age to a close. Understanding what mechanisms triggered and terminated this event remains enigmatic, but it is fundamental for gaining insights into inner workings Earth’s system. In study, we used combination well-dated speleothem ice-core records pinpoint timing its onsets terminations in various climatic regimes around world. We show YD...
The Liangzhu culture in the Yangtze River Delta (YRD) was among world’s most advanced Neolithic cultures. Archeological evidence suggests that ancient city abandoned, and collapsed at ~4300 years ago. Here, we present speleothem records from southeastern China conjunction with other paleoclimatic archeological data to show within a short anomalously wet period between 4345 ± 32 4324 30 ago, supporting hypothesis abandoned after large-scale flooding inundation. We further demise of cultures...
In southeastern China (SEC), the precipitation amount produced by East Asian summer monsoon (EASM) is almost equivalent to that during non-summer (NSM) period, both of them significantly affecting agriculture and socioeconomy. Here, we present a seasonally-resolved stalagmite δ18O record (δ18Os) for interval 1810-2009 AD from E'mei cave, Jiangxi Province, SEC. The comparison between δ18Os instrumental data indicates variability primarily controlled seasonality (i.e., ratio EASM/NSM...
<p>The anthropogenic warming of the Earth’s atmosphere is causing dynamical and thermodynamical changes in ocean circulation, including Asian summer monsoon (ASM) oxygen isotope compositions its precipitation. Here we present a high-resolution speleothem δ<sup>18</sup>O record from Shandong Peninsula, eastern China with an age precision ± 3 years, which conjunction five other existing records ASM domain, reveals robust weakening trend during global period, particularly...
Human activities within the context of a drying trend triggered megafaunal extinctions in Madagascar and Mascarene Islands.
We present a continuous C-O isotope series that shows the detailed variability of East Asian summer monsoon (EASM) since 11.0 ka BP. The is based on two stalagmites, namely, DSY1 and LM2, which were, respectively, obtained from Dongshiya Laomu caves. δ 18 O profiles stalagmite excurse negatively in early Holocene gradually become positive after around 6.9 BP, tracking change Northern Hemisphere insolation. Moreover, ‘early-Holocene maximum’ supported by records differs ‘mid-Holocene...
Abstract Climatic changes have played an important role in societal reorganizations. Particularly, the late 16th and early 17th century coincided with severely cold condition, extremely weak summer monsoon widespread population decline China. Here we present new speleothem oxygen isotope records across North South China, which concert historical documents, allow us to characterize “Late Ming Weak Monsoon Periods” (LMWMP) at unprecedented annual temporal resolution. Our analysis suggests that...
Abstract Our understanding of climate dynamics during millennial-scale events is incomplete, partially due to the lack their precise phase analyses under various boundary conditions. Here we present nine speleothem oxygen-isotope records from mid-to-low-latitude monsoon regimes with sub-centennial age precision and multi-annual resolution, spanning Heinrich Stadial 2 (HS2) — a event that occurred at Last Glacial Maximum. data suggests Greenland Antarctic ice-core chronologies require +320-...
Abstract Extensive research has explored how sweet spot conditions influence climate variability in the nonlinear Earth system. However, their effects throughout deglaciations remain unclear. Based on an annual‐laminated speleothem δ 18 O record with unprecedented chronology precision, we first identified a two‐step termination of Asian Heinrich Period‐1 at 15.11 and 14.69 ky BP (thousand years before present, where present is 1950 CE), each marked by centennial‐scale strengthening summer...
Abstract Speleothem multiproxy records are important for understanding the differences between dynamic and thermodynamic aspects of Asian summer monsoon. In this study, we simultaneously provide seasonally resolved oxygen isotope (δ 18 O s ) trace element ratio (Mg/Ca, Sr/Ca, Ba/Ca) from an actively growing stalagmite Zhangjia Cave, Sichuan Basin, southwestern China, covering past ∼130 years. The overall increasing trend in δ indicates a weakening monsoon circulation over last century, while...
Abstract Heinrich Stadial 4 during the last glacial period was marked by severe cooling at northern high latitudes along with attendant changes in Asian Monsoon (Chinese 4) and South American (South 4). Here we present improved constraints on timings of Heinrich/Chinese/South onset termination sub-centennial precision based speleothem records. We show that their initial onsets were essentially synchronous (40.20 ± 0.08 thousand years ago) led Antarctic warming ~300 years. The...
Abstract There is a general agreement that Northern Hemisphere temperatures have cooled over the past two millennia, culminating in Little Ice Age. However, this understanding partly relies on compilation of existing proxy records, majority which carry warm season bias such there an underrepresentation cold-season temperatures. Here we report unique temperature record based alkenone paleothermometer from northeastern Tibetan Plateau spans last millennia. In contrast to regional- and...
Speleothem records have radically changed our understanding of the paleo Asian monsoon (AM), but explanations for summer (ASM) variations in Holocene period are usually based on single proxy records, such as oxygen isotope (δ 18 O). The application multi-proxy to study forcing mechanism and internal structure climate events is more comprehensive accurate analysis paleoclimates than using records. Therefore, a speleothem record weak ASM 8.0–7.0 BP from Chongqing, which showed dry southwestern...