Zhaolong An
Biographic Data
| ID | 829705 |
|---|---|
| NAME | Zhaolong An |
| GIVEN NAMES | Zhaolong |
| FAMILY NAME | An |
| SIGNATURE | AN Z |
| AFFILIATIONS | Chinese Academy of Sciences |
| ORCID | 0000-0002-9538-9826 |
| VERIFIED | Yes |
| TOTAL WORKS | 50 |
| TOTAL CITATIONS | 205 |
| AUTHOR COUNT | 50 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1987 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 3 |
Comprehensive Evaluation and Dynamic Evolution Characteristics of Tourism Ecological Security Using the DPSIR-DS Model in the Yangtze River Economic Belt, China
The Yangtze River Economic Belt (YREB) is positioned as the main battlefield of ecological priority and green development in China. It is of great significance to dynamically grasp the situation of tourism ecological security in YREB for promoting the green and high-quality development of regional tourism. Aiming at the disadvantage of either-or in evaluation research, this study established the index system based on the inter-period DPSIR framew…
Landscape and Soil Erosion Changes Along Different Types of Road Over the Past 30 Years in the Largest Loess Tableland of China
Road construction, as a product of modern civilization, can alter landscape patterns and accelerate erosion, especially in the loess tableland area of China with fragile eco‐environment. Different types of road could change land surface and increased soil erosion in different ways, while knowledge about this topic is limited. In this study, our objective is to evaluate the landscape and soil erosion changes along different types of road in the la…
Metagenomic analysis of sedimentary archives reveals ‘historical’ antibiotic resistance genes diversity increased over recent decades in the environment
Antibiotic Resistance Genes (ARGs) are widespread in freshwater environments and represent a concealed threat to public health and aquatic eco-system safety. To date, only a limited number of studies have investigated the historical distribution of ARGs and their hosts through the analysis of freshwater sedimentary archives. This research gap constrains our comprehensive of the mechanisms underlying natural bacterial resistance formation during p…
Sharp decline of dust events induces regional wetting over arid and semi-arid Northwest China in the NCAR Community atmosphere model
Multiple lines of observational evidence have indicated a significant wetting over the arid and semi-arid Northwest China (NWC) during recent decades, coinciding with a simultaneous sharp decline of dust events. Although recent studies have attributed NWC wetting to different anthropogenic and natural forcings, the mechanisms are not definitive and the regional wetting has been greatly underestimated in the Coupled Model Intercomparison Project h…
The Sihailongwan Maar Lake, northeastern China as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
Sihailongwan Maar Lake, located in Northeast China, is a candidate Global boundary Stratotype Section and Point (GSSP) for demarcation of the Anthropocene. The lake's varved sediments are formed by alternating allogenic atmospheric inputs and authigenic lake processes and store a record of environmental and human impacts at a continental-global scale. Varve counting and radiometric dating provided a precise annual-resolution sediment chronology f…
Mineral magnetic record of the Miocene-Pliocene climate transition on the Chinese Loess Plateau, North China
Pre-Quaternary terrestrial climate variability is less well understood than that during the Quaternary. The continuous eolian Red Clay sequence underlying the well-known Quaternary loess-paleosol sequence on the Chinese Loess Plateau (CLP) provides an opportunity to study pre-Quaternary terrestrial climate variability in East Asia. Here, we present new mineral magnetic records for a recently found Red Clay succession from Shilou area on the easte…
The Anthropocene is functionally and stratigraphically distinct from the Holocene
Evidence of an Anthropocene epoch Humans are undoubtedly altering many geological processes on Earth—and have been for some time. But what is the stratigraphic evidence for officially distinguishing this new human-dominated time period, termed the “Anthropocene,” from the preceding Holocene epoch? Waters et al. review climatic, biological, and geochemical signatures of human activity in sediments and ice cores. Combined with deposits of new mater…
Stephen C. Porter, 1934–2015
the long-term former editor of Quaternary Research and a leader in the development of interdisciplinary Quaternary science, died in Santa Barbara, California, on February 19, 2015, at the age of 80.Porter became a widely respected and influential Quaternary scientist through geographically diverse research, international scientific leadership, and a long career at the University of Washington, starting in 1962.He was born and raised in Santa Barb…
When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal
Magnetic parameter variations in the Chaona loess/paleosol sequences in the central Chinese Loess Plateau, and their significance for the middle Pleistocene climate transition
A high-resolution rock magnetic investigation was performed on the Chaona Quaternary loess/paleosol sequences in the Central Chinese Loess Plateau. Based on a newly developed independent unturned time scale and magnetic records, we reconstructed the history of the East Asia monsoons during the last 3 Ma and explored the middle Pleistocene climate transition (MPT). Rock magnetic results show that the loess layers are characterized by relatively hi…
Trace-element variations in an annually layered stalagmite as recorders of climatic changes and anthropogenic pollution in Central China
We analyzed variations in the Sr/Ca, Ba/Ca, REE/Ca (REE: rare earth element), Zn/Ca, and Pb/Ca ratios preserved in an annually layered stalagmite, XL21, from central China. The stalagmite record spans the 95 year period AD 1914–2008. The Sr/Ca and Ba/Ca ratios have a significant positive correlation with the stalagmite's growth rate, suggesting that they were primarily controlled by growth-rate variations. Variations in REE/Ca ratios are consiste…
Quaternary structural partitioning within the rigid Tarim plate inferred from magnetostratigraphy and sedimentation rate in the eastern Tarim Basin in China
It has been proposed that within the Tarim Basin tectonic activity has been limited since Triassic time. However, on the basis of magnetostratigraphy from the eastern Tarim Basin, which defines the chronology of sedimentation and structural evolution of the basin, we show that the basin interior has been uplifted and partitioned during Quaternary. The magnetostratigraphy was constructed from 2228 samples that yielded acceptable inclination values…
High secondary aerosol contribution to particulate pollution during haze events in China
Interplay between the Westerlies and Asian monsoon recorded in Lake Qinghai sediments since 32 ka
Two atmospheric circulation systems, the mid-latitude Westerlies and the Asian summer monsoon (ASM), play key roles in northern-hemisphere climatic changes. However, the variability of the Westerlies in Asia and their relationship to the ASM remain unclear. Here, we present the longest and highest-resolution drill core from Lake Qinghai on the northeastern Tibetan Plateau (TP), which uniquely records the variability of both the Westerlies and the…
The variation of summer monsoon precipitation in central China since the last deglaciation
Human remains from Zhirendong, South China, and modern human emergence in East Asia
The 2007 discovery of fragmentary human remains (two molars and an anterior mandible) at Zhirendong (Zhiren Cave) in South China provides insight in the processes involved in the establishment of modern humans in eastern Eurasia. The human remains are securely dated by U-series on overlying flowstones and a rich associated faunal sample to the initial Late Pleistocene, >100 kya. As such, they are the oldest modern human fossils in East Asia and p…
Wet climate during the ‘Little Ice Age’ in the arid Tarim Basin, northwestern China
A relatively cold period, the ‘Little Ice Age’ (LIA), just prior to the current warm period, has been documented from many regions of the globe. However, hydrological changes (wet/dry conditions) during the LIA appear to be very different across different climatic regimes, suggesting that the position, strength and/or pattern of atmospheric circulation could have changed significantly in the past. Therefore, paleohydrological studies may have som…
Centennial- to decadal-scale monsoon precipitation variability in the semi-humid region, northern China during the last 1860 years
We developed a composite oxygen isotopic record of cave calcite for the last 1860 years based on three stalagmites from the Huangye Cave in eastern Gansu Province, northern China. The δ 18 O values reflect monsoon precipitation changes, with lower δ 18 O values representing higher precipitation and vice versa. Three intervals of high precipitation were identified at AD 138—450, AD 730—1200, and AD 1860—1960. Two intervals of low precipitation occ…
Atmospheric deterioration of Qin brick in an environmental chamber at Emperor Qin's Terracotta Museum, China
Millennial- and orbital-scale changes in the East Asian monsoon over the past 224,000 years
Tree-Ring-Derived Precipitation Records from Inner Mongolia, China, Since A.D. 1627
Two Chinese pine (Pinus tabulaeformis) tree-ring width chronologies up to 375 years long were used to reconstruct rainfall from February to early July for the Wu Dangzhao region and from February to mid-July for the La Madong region, Inner Mongolia, China. The predictor variables account for 44.3% and 42.7% of the variance in precipitation, respectively. Both historical records and two other tree-ring based precipitation reconstructions from the …
Exploratory Temperature and Precipitation Reconstructions from the Qinling Mountains, North-Central China
February–April (FMA) temperature at Foping (1879–1989) and July–August (JA) precipitation at Xian (1895–1988) have been reconstructed using total ring width (TRW) and maximum latewood density (MXD) from trees in the Qinling Mountains, at the northern limit of the East Asian monsoon, in central China. The Xian JA precipitation reconstruction, albeit short, represents the first well-replicated, crossdated dendroclimatic reconstruction of summer mon…
Episodic gullying and paleomonsoon cycles on the Chinese Loess Plateau
Buried gullies exposed in road excavations along the margin of a loess tableland on the Loess Plateau of central China lie within a thick loess-paleosol succession that spans ≥780,000 years. Constraining ages for gully cutting and filling are provided by dates of loess and soil units cut by and capping the paleogullies. An episode of gully cutting begins at the onset of an interglaciation and ceases as the gullies begin to fill with colluvium and…
A high-resolution, absolute-dated Holocene and deglacial Asian monsoon record from Dongge Cave, China
The Holocene Asian Monsoon
A 5-year-resolution absolute-dated oxygen isotope record from Dongge Cave, southern China, provides a continuous history of the Asian monsoon over the past 9000 years. Although the record broadly follows summer insolation, it is punctuated by eight weak monsoon events lasting ∼1 to 5 centuries. One correlates with the “8200-year” event, another with the collapse of the Chinese Neolithic culture, and most with North Atlantic ice-rafting events. Cr…
When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal
Centennial- to decadal-scale monsoon precipitation variability in the semi-humid region, northern China during the last 1860 years
We developed a composite oxygen isotopic record of cave calcite for the last 1860 years based on three stalagmites from the Huangye Cave in eastern Gansu Province, northern China. The δ 18 O values reflect monsoon precipitation changes, with lower δ 18 O values representing higher precipitation and vice versa. Three intervals of high precipitation were identified at AD 138—450, AD 730—1200, and AD 1860—1960. Two intervals of low precipitation occ…
The Sihailongwan Maar Lake, northeastern China as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
Sihailongwan Maar Lake, located in Northeast China, is a candidate Global boundary Stratotype Section and Point (GSSP) for demarcation of the Anthropocene. The lake's varved sediments are formed by alternating allogenic atmospheric inputs and authigenic lake processes and store a record of environmental and human impacts at a continental-global scale. Varve counting and radiometric dating provided a precise annual-resolution sediment chronology f…
Wet climate during the ‘Little Ice Age’ in the arid Tarim Basin, northwestern China
A relatively cold period, the ‘Little Ice Age’ (LIA), just prior to the current warm period, has been documented from many regions of the globe. However, hydrological changes (wet/dry conditions) during the LIA appear to be very different across different climatic regimes, suggesting that the position, strength and/or pattern of atmospheric circulation could have changed significantly in the past. Therefore, paleohydrological studies may have som…
Atmospheric deterioration of Qin brick in an environmental chamber at Emperor Qin's Terracotta Museum, China
The vegetation and monsoon variations at the desert-boess transition belt at Midiwan in northern China for the last 13 ka
Fine-resolution palaeovegetation and palaeomonsoon proxies for the last 13 ka have been established at the desert-loess transition belt in northern China. These are based on pollen, organic carbon and δ13C analysis of samples from a peat section at Midiwan. Results show that the palaeovegetation underwent nine major changes: desert-grassland, grassland, semi-desert, humid grassland, desert, sparse-wood-grassland, steppe, humid grassland and deser…
The paleosol complex S5 in the China Loess Plateau ? A record of climatic optimum during the last 1.2 Ma
New Magnetostratigraphic Dates of Lantian Homo erectus
Skeletal remains of Homo erectus found in Pleistocene loess at two sites near Lantian in central China are of greatly different geologic age. The cranium found in the fossil-bearing strata at Gongwangling is about 1.15 myr old whereas the remains found at the Chenjiawo locality in middle Pleistocene loess are about 0.65 myr old. The dating is based on new paleomagnetic polarity determinations and on the lithostratigraphic position of the fossils …
Loess stratigraphy in Central China
Magnetic susceptibility evidence of monsoon variation on the Loess Plateau of central China during the last 130,000 years
The magnetic susceptibility of loess and paleosols in central China represents a proxy climate index closely related to past changes of precipitation and vegetation, and thus to summer monsoon intensity. Time series of magnetic susceptibility constructed for three loess-paleosol sequences in the southern part of the Chinese Loess Plateau document the history of summer monsoon variation during the last 130,000 yr. They correlate closely with the o…
Cyclic Quaternary alluviation and terracing in a nonglaciated drainage basin on the north flank of the Qinling Shan, central China
Pleistocene alluvial terraces of the nonglaciated Ba River drainage basin on the north flank of the Qinling Shan are capped by a succession of loess units and paleosols that correlate with the standard marine isotope chronology and are used to date the subjacent alluvial gravels. Alluvial fills were deposited during isotope stages 2, 6, 8, 12, and 16, whereas terracing occurred during interglacial stages 1, 5, 7, 11, and 15. The apparent absence …
Episode of Strengthened Summer Monsoon Climate of Younger Dryas Age on the Loess Plateau of Central China
The Baxie loess section, just east of the Tibetan Plateau, contains evidence showing that the Asian monsoon climate experienced an abrupt reversal near the end of the last glacial age. Rapid deposition of dust under cool, dry full-glacial conditions gave way to an interval of soil development and reduced dust influx attributed to a strengthening of the warm, moist summer monsoon. A subsequent abrupt increase in dust deposition, a response to a we…
Late Quaternary Records of the Atmospheric Input of Eolian Dust to the Center of the Chinese Loess Plateau
The concentrations of 15 elements and mineral grain-size distributions were determined for Late Quaternary loess sediments from the Chinese Loess Plateau. Particle-size distributions of the loess were approximately log-normal for each of three modes (i.e., 0.04 to 1 μm diameter, 2 to 20 μm, and 20 to 200 μm) that integrate the transport and deposition of eolian dust. The mass particle-size distributions of typical crustal elements (Si, Ca, Fe, Ti…
Determining Paleosol Topography Using Seismic Refraction
The seismic refraction reversed profiling technique has been used to investigate the topography of the last interglacial soil (paleosol S1) within the central Chinese Loess Plateau near Xifeng. The results suggest an essentially flat-lying soil at a depth which varies by only a few meters over an area of more than 10 km 2 . In addition, the results indicate a high-velocity layer at 50-60 m depth which is thought to coincide with a layer of carbon…
Grain Size of Quartz as an Indicator of Winter Monsoon Strength on the Loess Plateau of Central China during the Last 130,000 Yr
The Chinese loess-paleosol sequence constitutes an important record of variations in Asian monsoon climate over the past 2.4 myr. Magnetic susceptibility of loess and paleosols has been used as a proxy for summer monsoon intensity, while median grain size has been regarded as a measure of the strength of winter monsoon winds that were responsible for most of the dust transport. However, median grain size is only an approximate index of winter mon…
Correlation between climate events in the North Atlantic and China during the last glaciation
Variability of Monsoon Climate in East Asia at the End of the Last Glaciation
High-resolution paleomonsoon proxy records from peat and eolian sand–paleosol sequences at the desert–loess transition zone in China denote a rapid oscillation from cold–dry conditions (11,200–10,600 14 C yr B.P.) to cool–humid conditions (10,600–10,200 14 C yr B.P.), followed by a return to cold–dry climate (10,200–10,000 14 C yr B.P.). Variations in precipitation proxies suggest that significant climatic variability occurred in monsoonal easter…
Biogenic Silica Record in Lake Biwa of Central Japan over the Past 145,000 Years
The record of the biogenic silica flux (BSF, g cm −2 (10 3 yr) −1 ) in Lake Biwa reflects changes in diatom productivity in the lake and provides information regarding changes in paleoclimatic conditions. The BSF record of Lake Biwa demonstrates five periods over the past ca. 145,000 yr when the BSF values were significantly greater than 7.5 g cm −2 (10 3 yr) −1 , and five intervals when they were lower. The data imply that paleoclimatic conditio…
Eolian Quartz Flux to Lake Biwa, Central Japan, over the Past 145,000 Years
Eolian quartz flux (EQF, g cm −2 (10 3 yr) −1 ) to Lake Biwa, central Japan, provides direct information on variations of the East Asian winter monsoon. Lake Biwa sediments spanning the past ca. 145,000 yr are characterized by two main periods when EQF values were significantly greater than 5.50 g cm −2 (10 3 yr) −1 , and two main intervals during which EQF values were lower. Two periods with EQF values >5.50 g cm −2 (10 3 yr) −1 occurred from ca…
Variation of Rb/Sr Ratios in the Loess-Paleosol Sequences of Central China during the Last 130,000 Years and Their Implications for Monsoon Paleoclimatology
Rb, Sr, and magnetic susceptibility have been measured in the last interglacial–glacial loess profiles at Luochuan and Huanxian, central China. A high degree of similarity between the parameters in both profiles suggests that variations of Rb/Sr ratios in the sequence can be regarded as an indicator of East Asian summer monsoon strength. Matching the Rb/Sr record with the SPECMAP δ 18 O curve suggests that the Rb/Sr ratio responds sensitively to …
Use of Rubidium to Date Loess and Paleosols of the Louchan Sequence, Central China
Rb concentrations, analyzed at 20-cm intervals from the Luochuan sequence of loess and paleosols, are sensitive to the loess–paleosol alternation controlled by monsoon climate. Because it is geochemically immobile, Rb can be well preserved in the loess–paleosol sequence after deposition, and its concentration depends mainly on properties of the winter monsoon-blown dust and on intensity of the summer monsoon-induced pedogenesis. A curvilinear rel…
Variability of East Asian Winter Monsoon in Quaternary Climatic Extremes in North China
In order to examine high-frequency variations of East Asian winter monsoon in Quaternary climatic extremes, two typical loess–paleosol sequences in the Chinese Loess Plateau were investigated. Sandy layers in the loess deposits, the “Upper sand” and “Lower sand” (layers L9 and L15, respectively), which represent a high-resolution record of paleomonsoon changes, have been sampled at intervals of 5–6 cm from sections at Luochuan and Xifeng. The gra…
The history and variability of the East Asian paleomonsoon climate
Asynchronous Holocene optimum of the East Asian monsoon
Dependence of Near-Surface Magnetic Susceptibility on Dust Accumulation Rate and Precipitation on the Chinese Loess Plateau
Magnetic susceptibility (MS) of surface sediment varies systematically across the Loess Plateau in central China, decreasing exponentially from >200×10 −8 m 3 /kg at the northern margin of the Qinling Shan to ≤30×10 −8 m 3 /kg near the southern margin of the Mu Us Desert. MS correlates highly with loess median grain size ( r 2 =0.79), which decreases south-southeastward across the plateau. It also correlates with mean annual temperature (MAT) and…
Evolution of Asian monsoons and phased uplift of the Himalaya–Tibetan plateau since Late Miocene times
A High-Resolution Absolute-Dated Late Pleistocene Monsoon Record from Hulu Cave, China
Oxygen isotope records of five stalagmites from Hulu Cave near Nanjing bear a remarkable resemblance to oxygen isotope records from Greenland ice cores, suggesting that East Asian Monsoon intensity changed in concert with Greenland temperature between 11,000 and 75,000 years before the present (yr. B.P.). Between 11,000 and 30,000 yr. B.P., the timing of changes in the monsoon, as established with 230 Th dates, generally agrees with the timing of…
Grain-size distribution function of polymodal sediments in hydraulic and aeolian environments, and numerical partitioning of the sedimentary components
Magnetostratigraphic dating of early humans in China
The vegetation and monsoon variations at the desert-boess transition belt at Midiwan in northern China for the last 13 ka
Fine-resolution palaeovegetation and palaeomonsoon proxies for the last 13 ka have been established at the desert-loess transition belt in northern China. These are based on pollen, organic carbon and δ13C analysis of samples from a peat section at Midiwan. Results show that the palaeovegetation underwent nine major changes: desert-grassland, grassland, semi-desert, humid grassland, desert, sparse-wood-grassland, steppe, humid grassland and deser…
Timing, Duration, and Transitions of the Last Interglacial Asian Monsoon
Thorium-230 ages and oxygen isotope ratios of stalagmites from Dongge Cave, China, characterize the Asian Monsoon and low-latitude precipitation over the past 160,000 years. Numerous abrupt changes in 18 O/ 16 O values result from changes in tropical and subtropical precipitation driven by insolation and millennial-scale circulation shifts. The Last Interglacial Monsoon lasted 9.7 ± 1.1 thousand years, beginning with an abrupt (less than 200 year…
Geology and Paleoclimatology Research (39 works) · Geology (38 works) · Geography (30 works) · Paleontology (29 works) · Climatology (26 works) · Physical geography (25 works) · Loess (24 works) · Monsoon (23 works) · East Asian Monsoon (21 works) · Pleistocene-Era Hominins and Archaeology (19 works)