A5040527746- Geology and Paleoclimatology Research
- Tree-ring climate responses
- Climate variability and models
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Pacific and Southeast Asian Studies
- Isotope Analysis in Ecology
- Geological formations and processes
- Cryospheric studies and observations
- Geological and Geophysical Studies
- Plant Ecology and Soil Science
- Ecology and Vegetation Dynamics Studies
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Plant and Fungal Species Descriptions
- Coastal wetland ecosystem dynamics
- Remote Sensing and Land Use
- Aeolian processes and effects
- Forest, Soil, and Plant Ecology in China
- GABA and Rice Research
- Evolution and Paleontology Studies
- Marine and coastal ecosystems
- Plant Water Relations and Carbon Dynamics
- Microbial Community Ecology and Physiology
- Meteorological Phenomena and Simulations
Yunnan Normal University
2014-2024
Nanjing Institute of Geology and Paleontology
1999-2023
Louisiana State University
2001-2023
Chinese Academy of Sciences
1999-2023
Chongqing University
2018
University at Albany, State University of New York
2006-2015
Albany State University
2009-2011
Atmospheric and Environmental Research
2008
Academia Sinica
2008
State University of New York
2007
Impacts of global climate change on terrestrial ecosystems are imperfectly constrained by ecosystem models and direct observations. Pervasive transformations occurred in response to warming associated climatic changes during the last glacial-to-interglacial transition, which was comparable magnitude projected for next century under high-emission scenarios. We reviewed 594 published paleoecological records examine compositional structural vegetation since glacial period project magnitudes...
Seasonal biases (the warm-season contribution) of Holocene mean annual temperature (MAT) reconstructions from geological records were proposed as a possible cause the mismatch with climate simulated temperature. Here we analyze terrestrial mollusk assemblages that best reflect seasonal signals and provide quantitative MAT four-season for northern China during past 20,000 years. The estimated temperatures four-season-mean based on mollusks shows peak ~9000-4000 years ago, followed by cooling...
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Abstract We present a record of monsoon variations for the early and middle Holocene that is inferred from geochemistry sediment cores Ahung Co, lake in central Tibet. The resolution this better than 50 yr age model derived radiocarbon ages terrestrial charcoal, which eliminates errors associated with hard-water effect. made down-core geochemical measurements % carbonate, organic carbon, C/N δ 13 C bulk matter, 18 O dolomite. Proxy calibration modern water-balance reconstruction show these...
Recent studies indicated that the spatial pattern and temporal variability of summer rainfall over eastern China are well correlated with Pacific Decadal Oscillation (PDO). Here we used a data set drought/flood index (a proxy rainfall) since 1470 AD to reconstruct annual PDO index. The reconstruction indicates is robust feature North climate throughout study period, however, major modes oscillation providing basic regime timescale have not been persistent last 530 years. quasi‐centennial...
Abstract Prehistoric human activities were likely influenced by cyclic monsoon climate changes in East Asia. Here we report a decadal-resolution Holocene pollen record from an annually-laminated Maar Lake Northeast China, proxy of climate, together with compilation 627 radiocarbon dates archeological sites China which is activity. The results reveal synchronous ~500-year quasi-periodic over the last 8000 years. warm-humid/cold-dry phases cycles correspond closely to intensification/weakening...
Abstract Phytoliths and biomolecular components extracted from ancient plant remains Chang’an (Xi’an, the city where Silk Road begins) Ngari (Ali) in western Tibet, China, show that tea was grown 2100 years ago to cater for drinking habits of Western Han Dynasty (207BCE-9CE) then carried toward central Asia by ca.200CE, several hundred earlier than previously recorded. The earliest physical evidence both regions suggests a branch across Tibetan Plateau, established second third century CE.
Abstract Here we presented a high-resolution 5350-year pollen record from maar annually laminated lake in East Asia (EA). Pollen reflected the dynamics of vertical vegetation zones and temperature change. Spectral analysis on percentages/concentrations Pinus Quercus proxy, revealed ~500-year quasi-periodic cold-warm fluctuations during past 5350 years. This cyclic climate change occurred EA mid-late Holocene even last 150 years dominated by anthropogenic forcing. It was almost phase with...
Abstract How to distinguish and quantify past human impacts on vegetation is a significant challenge in paleoecology. Here, we propose novel method, the error inflection point-discriminant technique. It finds out points (IPs) of regression errors pollen–climate transfer functions using modern pollen spectra from with different values Human Influence Index (HII), which represent HII threshold native/secondary secondary/artificial systems. Our results show that value at IPs approximately 22...
In China, the abundance of historical documentary records in form Fang Zhi (semiofficial local gazettes) offers an extraordinary opportunity for providing a high-resolution dataset frequency typhoon strikes. We have reconstructed 1,000-year time series landfalls Guangdong Province southern China since AD 975 based on data compiled from Zhi. Even though 571 strikes recorded documents probably underrepresent total number Guangdong, calibration against observations during instrumental period...
We present here the first high-resolution pollen record of vegetation response to interactions hurricane and fire disturbances over past 1200 yr from a small lake in Alabama on Gulf Mexico coast. The paleo tempestological inferred wash sand layers suggests that coast was directly struck by Saffir–Simpson category 4 or 5 hurricanes twice during last yr, around 1170 860 cal BP, suggesting an annual landfall probability 0.17% for these intense hurricanes. charcoal data suggest fires occurred...
Abstract Knowledge of decadal‐centennial‐scale precipitation cycles is important for predicting the status water resources and thus food security in region influenced by “Asian Water Tower” (the Tibetan Plateau, TP). However, drivers these TP remain unclear. Here we present a 1,656‐years (5‐years‐resolution) mean annual record reconstructed fossil pollen assemblages from annually laminated sediments lake interior. The reveals three dominant cycles, with lengths ∼200‐, ∼88‐, ∼60‐years,...
In this study we examine the relationships between Abies and Picea abundance in surface pollen sub‐alpine coniferous forest (SCF) distribution, elevation climate Qinghai–Tibetan Plateau using a large modern data set consisting of 857 samples. Results indicate that are abundant southern eastern Plateau, where SCF dominates landscape. Pollen percentages both show unimodal pattern with changes climate, their optima occur at elevations from 2500 to 4000 m a.s.l., mean annual temperature −1 10 °C...
A well-dated pollen record from a large lake located on the meadow–steppe ecotone provides history of shift in response to monsoonal climate changes over last 6000 years central Tibetan Plateau. The indicates that shifted eastward during 6000–4900, 4400–3900, and 2800–1600 cal. yr BP when steppes occupied this region, whereas it westward other intervals were replaced by meadows. quantitative reconstruction paleoclimate derived shows monsoon precipitation fluctuated around present level Three...
A high-resolution multiproxy record, including pollen, foraminifera, and alkenone paleothermometry, obtained from a single core (DG9603) the Okinawa Trough, East China Sea (ECS), provided unambiguous evidence for asynchronous climate change between land ocean over past 40 ka. On land, deglacial stage was characterized by rapid warming, as reflected paleovegetation, it began ca. 15 kaBP, consistent with timing of last warming in Greenland. However, sea surface temperature estimates...
Abstract Instrumental records indicate a close relationship between the El Niño‐Southern Oscillation and East Asian winter monsoon (EAWM) on interannual to decadal time scales. However, few studies have examined possible links them centennial/millennial In Northeast China, modern observations show that immigration of temperate forest trees such as Pinus (pine) Quercus (oak) into cold boreal is sensitive changes in temperature. Here we present continuous high‐resolution pollen record from...
Significance The characters and mechanisms of seasonal precipitation changes during the last glaciation in tropical East Asia are enduring important issues debate for researchers from many disciplines. Sensitive indicators annual/seasonal hydrological keys to understanding issues. Here, we use successive phytolith pollen records reconstruct catchment Huguangyan Maar Lake, an site at northern that could simultaneously receive climate signals higher-latitude continent ocean. We then identify...
Abstract Climate changes had major impacts on the vegetation of East Asia during last deglaciation. However, rate and pattern succession in response to large-scale climatic events this interval are controversial. Here, we present well-dated decadal-resolution pollen records from annually laminated Maar Lake Xiaolongwan The were rapid near-synchronous with millennial-scale events, including Greenland Stadial 2.1a (GS-2.1a), Interstadial 1 (GI-1), (GS-1), early Holocene (EH). responded...