A5046633443- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Pleistocene-Era Hominins and Archaeology
- Tree-ring climate responses
- Archaeology and ancient environmental studies
- Marine and coastal ecosystems
- Hydrocarbon exploration and reservoir analysis
- Evolution and Paleontology Studies
- Geological Studies and Exploration
- Groundwater and Isotope Geochemistry
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Economic and Environmental Valuation
- Environmental Education and Sustainability
- Geological and Geochemical Analysis
- Coastal wetland ecosystem dynamics
- Gold and Silver Nanoparticles Synthesis and Applications
- Pacific and Southeast Asian Studies
- Cryospheric studies and observations
- Marine and environmental studies
- Fluoride Effects and Removal
University of Hong Kong
2016-2025
Institute of Earth Environment
2021-2025
Chinese Academy of Sciences
2014-2025
Tianjin Centers for Disease Control and Prevention
2010-2024
Chinese University of Hong Kong
2011-2024
Central South University
2024
Jilin Jianzhu University
2023-2024
Beijing Normal University - Hong Kong Baptist University United International College
2024
Hong Kong Baptist University
2024
Beijing Normal University
2024
About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How temperature changed during this transition remains poorly understood, and evidence for Northern Hemisphere polar is controversial. Here, we report proxy records of sea surface temperatures multiple ocean localities show that the high-latitude decrease was heterogeneous. High-latitude (45 degrees 70 in both hemispheres)...
The alkenone– p CO 2 methodology has been used to reconstruct the partial pressure of ancient atmospheric carbon dioxide ( ) for past 45 million years Earth's history (Middle Eocene Pleistocene epochs). present long-term record is a composite data from multiple ocean localities that express wide range oceanographic and algal growth conditions potentially bias results. In this study, we spanning 40 single marine locality, Ocean Drilling Program Site 925 located in western equatorial Atlantic...
Birth of the Cool Over past 4 million years or so, tropical sea surface temperatures have experienced a cooling trend (see Perspective by Philander ). Herbert et al. (p. 1530 ) analyzed temperature records 3.5 from low-latitude sites spanning world's major ocean basins in order to determine timing and magnitude that has accompanied intensification Northern Hemisphere ice ages since Pliocene. Martínez-Garcia 1550 found enigmatic eastern equatorial Pacific cold tongue, feature one might not...
Antarctica glaciation began soon after a large decrease in the concentration of atmospheric carbon dioxide around 35 million years ago.
A tropical Pacific climate state resembling that of a permanent El Niño is hypothesized to have ended as result reorganization the ocean heat budget ∼3 million years ago, time when large ice sheets appeared in high latitudes Northern Hemisphere. We report high-resolution alkenone reconstruction conditions heart eastern equatorial (EEP) cold tongue reflects combined influences changes thermocline, properties thermocline's source waters, atmospheric greenhouse gas content, and orbital...
The Pliocene warm interval has been difficult to explain. We reconstructed the latitudinal distribution of sea surface temperature around 4 million years ago, during early Pliocene. Our reconstruction shows that meridional gradient between equator and subtropics was greatly reduced, implying a vast poleward expansion ocean tropical pool. Corroborating evidence indicates Pacific contrast 32 degrees N evolved from approximately 2 C ago 8 today. pool evidently had enormous impacts on climate,...
The appearance of permanent El Niño-like conditions prior to 3 million years ago is founded on sea-surface temperature (SST) reconstructions that show invariant Pacific warm pool temperatures and negligible equatorial zonal gradients. However, only a few SST records are available, these potentially compromised by changes in seawater chemistry, diagenesis, calibration limitations. For this study, we establish new biomarker-SST the was ~4°C warmer 12 ago. Both cold tongue slowly cooled toward...
Abstract Summer temperatures on the Tibetan Plateau (TP) significantly affect stability of glaciers that provide steady water resources to nearly half world population. However, lack reliable, long‐term proxy records greatly impedes understanding regional temperature sensitivity climate forcings. Here we present a 16 ka long, alkenone‐based summer record from Lake Qinghai, northeastern TP demonstrates major response changes in insolation and Atlantic Meridional Overturning Circulation during...
The relative importance of north-south migrations the intertropical convergence zone (ITCZ) versus El Niño-Southern Oscillation and its associated Pacific Walker Circulation (PWC) variability for past hydrological change in western tropical is unclear. Here we show that ITCZ migration was not only mechanism hydrologic during last millennium, PWC profoundly influenced hydrology. We present reconstructions from Cattle Pond, Dongdao Island South China Sea, where multi-decadal rainfall downcore...
Quantum effects in plasmonic systems play an important role defining the optical response of structures with subnanometer gaps. Electron tunneling across gaps can occur, altering both far-field and near-field confinement enhancement. In this study, we experimentally theoretically investigate plasmon coupling gold "nanomatryoshka" (NM) nanoparticles different core–shell separations. Plasmon between core shell become significant when their separation decreases to 15 nm. When below 1 nm, near-...
The complicity of long-term land surface temperature (LST) changes has been under investigated and less understood, hindering our understanding the history mechanism terrestrial climate change. Here, we report longest (800 thousand years) LSTs based on distributions soil fossil bacterial glycerol dialkyl tetraethers preserved in well-dated loess-paleosol sequences at center Chinese Loess Plateau. We have found a previously-unrecognized increasing early prolonged warming pattern toward...
Significance The relative roles of the two plausible causes, Cenozoic global cooling and Tibetan Plateau uplift, for Asian interior aridification/desertification are often difficult to disentangle. High-quality terrestrial records from Tarim Basin document how enhanced aridification occurred over last 7 my, episodic lacustrine environments currently prevailing desert environments. During Late Miocene–Early Pliocene period, occurrences great lakes thus wetter climate closely corresponded...
The Miocene Climatic Optimum (MCO) from ~17 to 14 million years ago (Ma) represents an enigmatic reversal in Cenozoic cooling. A synthesis of marine paleotemperature records shows that the MCO was a local maximum global sea surface temperature superimposed on period at least 19 Ma 10 Ma, during which temperatures were order 10°C warmer than present. Our high-resolution reconstruction ocean crustal production, proxy for tectonic degassing carbon, suggests production rates ~35% higher modern...