Hai Cheng

Hai Cheng
Xi'an Jiaotong University | XJTU ·  School of Human Settlement and Civil Engineering

About

883
Publications
323,785
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54,482
Citations
Citations since 2017
360 Research Items
32770 Citations
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201720182019202020212022202301,0002,0003,0004,0005,0006,000
201720182019202020212022202301,0002,0003,0004,0005,0006,000
Introduction

Publications

Publications (883)
Article
Full-text available
Plain Language Summary Understanding the controls of the soil organic carbon (SOC) turnover on spatio‐temporal scales is of great significance to predict the soil carbon stock. The current knowledge of SOC turnover on the longer temporal scale is scarce due to a lack of accurate chronology. Here, we present Holocene speleothem U‐Th ages paired with...
Article
Full-text available
Plain Language Summary As the most pronounced abrupt climate event in the Holocene, the 8.2 ka event has been studied using various geological archives worldwide, but its detailed structure in North China and its link to other climate systems remain poorly understood. Since the Beijing speleothem δ¹⁸O, a proxy of the precipitation δ¹⁸O, is sensitiv...
Article
Full-text available
Quaternary Asian low-latitude hydroclimate cyclicity has long been attributed to insolation forcing, in contrast to the dominant ice-sheet and CO 2 controls identified in mid-high-latitude regions. However, debates exist regarding these rainfall variations and forcings due to inconsistent reconstructions and simulations. Here, by combining rainfall...
Article
The Chinese Loess Plateau (CLP) is located in northern China, a region climatically dominated by the East Asian monsoon. Speleothem records from this region are crucial to fully understand the variability of the East Asian summer monsoon (EASM) and reconcile the disparity seen between loess records and speleothem δ18O records for the EASM. Here, we...
Article
Full-text available
The transition from glacial to interglacial periods has been hypothesized to be linked to millennial-scale changes in oceanic/atmospheric circulation, but the relationships between these phenomena remain poorly constrained. Here we present a speleothem oxygen isotope record from Yongxing Cave, China, spanning 40.9 to 33.1 ka and compare this to exi...
Article
The sequence of abrupt climate variability during Termination III (T-III) is still controversial due to the scarcity of well-dated and high-resolved paleoclimate records. Here, we present 230Th-dated stalagmite d13C and d18O data covering T-III from northern China for the first time, with an average resolution of ~20 years. T-III was featured by tw...
Preprint
Full-text available
The Last Interglacial (LIG, ~130-116 ka) was one of the warmest interglacials of the past 800,000 years and an important test bed for future climate conditions warmer than today. LIG temperature reconstructions from marine records as well as paleoclimate models show that mid and high northern latitudes were considerably warmer by about 2 to 5°C com...
Preprint
Full-text available
The carbon isotopic signature inherited from soil/epikarst processes may be modified by degassing and prior calcite precipitation (PCP) before its imprint on speleothem calcite. Despite laboratory demonstration of PCP effects on carbon isotopes and increasingly sophisticated models of the governing processes, to date, there has been limited effort...
Conference Paper
Full-text available
This study reports the results of a comprehensive radiometric dating campaign carried out on 51 speleothems from caves in Apulia and Sardinia during the last ~7 years. Around 230 ages were produced by exploiting the U-Th method. Sampling targeted 5 caves in Apulia and 12 caves in Sardinia. All caves are located ~41˚N (±1˚) latitude, representing an...
Article
Full-text available
Studies have shown that East Asia experienced several abrupt centennial‐scale weak monsoonal events in the early Holocene. However, the timing and structure of these climate events remain unclear due to the lack of precisely dated and highly resolved records. In this study, we present a well‐dated high‐resolution East Asia summer monsoon record fro...
Article
Full-text available
Our understanding of climate dynamics during millennial-scale events is incomplete, partially due to the lack of 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 the H...
Article
Both external forcing and internal climate variability are playing significant roles in driving the East Asian summer monsoon (EASM) changes. However, dynamic linkages between these natural forcings and EASM on decadal timescales remain uncertain, partly due to the limited instrumental climate data. Here, we present a high-resolution EASM record ov...
Article
Full-text available
The Marine Isotope Stage (MIS) 4/3 boundary, the so-called unfinished or failed termination, is a time period during which climate shifted from glacial to near-interglacial conditions that is akin to the Termination I. Paleoclimate records on this boundary can provide insights into the mechanisms of abrupt climate change under the circumstances whe...
Article
The widely accepted “Milankovitch theory” explains insolation-induced waxing and waning of the ice sheets and their effect on the global climate on orbital timescales. In the past half century, however, the theory has often come under scrutiny, especially regarding its “100-ka problem.” Another drawback, but the one that has received less attention...
Article
The relationship between monsoon circulation and regional hydrology in the Yangtze River Basin since the Last Glacial Maximum (LGM) remains unclear. In this study, we present speleothem (LS46) δ¹⁸O and δ¹³C records over the past 23.5 kyr from the Luoshui Cave in Central China. Stalagmite LS46 δ¹³C displayed a good similarity with variations in δDwa...
Article
The rainfall changes in East Asian summer monsoon (EASM) regions on the orbital timescale remain controversial due to the lack of reliable rainfall records. Here, we present new multiproxy records (δ18O, δ13C, Sr/Ca and Mg/Ca) of a 230Th-dated stalagmite from Hulu Cave in central eastern China. Multiproxy records reconstruct a regional hydroclimate...
Article
Full-text available
Protracted droughts lasting years to decades constitute severe threats to human welfare across the Indian subcontinent. Such events are, however, rare during the instrumental period ( ca . since 1871 CE). In contrast, the historic documentary evidence indicates the repeated occurrences of protracted droughts in the region during the preinstrumental...
Article
Speleothem oxygen isotope (δ¹⁸O) constitutes one of key proxies to reconstruct the Indian and East Asian summer monsoon (ISM and EASM) hydroclimate history on a wide range of timescales. Here, we use three new well-dated speleothem δ¹⁸O records from Tianmen cave, in the south-central Tibetan Plateau (TP), together with previous records from the sam...
Chapter
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The Azerou massif is in Tellian nappes of the Algerian Atlas. This narrow Cenomanian carbonate ridge is surrounded by marly lowlands, the Soummam depression to the north and the Hodna plains to the south. The Azerou aquifer is drained toward the north by thermal springs (called Hamman al-Biban in Arabic) along the Azerou oued, which crosses the mas...
Article
The finding of Upper Paleolithic engravings in 2016 triggered a multidisciplinary investigation of the Alkerdi cave system (Urdazubi, N Spain). The study of the speleogenetic processes led to the identification of at least 6 paragenetic cave levels with associated sedimentary infill. In order to unravel the timing of changes in the karst dynamics a...
Article
Long-chain alkenones (LCAs) produced by Group 1 Isochrysidales from freshwater lakes feature a highly specific profile with almost the same abundances of two C37 tri-unsaturated alkenone isomers. Their unsaturation ratios have been proposed to have great potential for cold-season paleotemperature reconstructions. However, recent study based on the...
Article
We reconstructed high-resolution paleoclimate records with 24 ²³⁰Th/U dates, 706 sets of stable isotope values (δ¹⁸O and δ¹³C) from a stalagmite from Shima Cave, Hunan Province, central China. The stalagmite grew during the last deglaciation from 19.7 to 13.3 ka, with a 1500-year hiatus during Heinrich Stadial 1. We interpret stalagmite δ¹⁸O as the...
Article
Full-text available
The rate and consequences of future high latitude ice sheet retreat remain a major concern given ongoing anthropogenic warming. Here, new precisely dated stalagmite data from NW Iberia provide the first direct, high-resolution records of periods of rapid melting of Northern Hemisphere ice sheets during the penultimate deglaciation. These records re...
Conference Paper
Full-text available
The Last Interglacial (LIG, ~130–116 ka) was one of the warmest interglacials of the past 800,000 years. Speleothems offer superior age control and a few LIG records are available from the Eastern Alps. In order to prospect for LIG speleothems in the Western Alps, we drilled small diameter cores at the base of stalagmites. In the Vercors, we sample...
Article
Full-text available
In Arabia, the first half of the sixth century CE was marked by the demise of Himyar, the dominant power in Arabia until 525 CE. Important social and political changes followed, which promoted the disintegration of the major Arabian polities. Here, we present hydroclimate records from around Southern Arabia, including a new high-resolution stalagmi...
Preprint
Speleothem δ18O is widely used as a proxy for rainfall amount in the tropics on glacial-interglacial to interannual scales. However, uncertainties in the interpretation of this renowned proxy pose a vexing problem in tropical paleoclimatology. Here, we present paired measurements of Mg/Ca and δ18O for multiple stalagmites from southwest Sulawesi, I...
Article
Meteorological observations indicate that both natural and anthropogenic forcing contribute to regional drought/flood in the East Asian summer monsoon (EASM) domain. However, spatiotemporal rainfall pattern and its dynamics during natural climatic variability remains unclear. Here we reconstruct a ∼3 year-resolution EASM precipitation record over t...
Article
Matupi Cave, near the equator at 1.2°N in the northeastern Democratic Republic of the Congo, is in an inland region of equinoctial (March–May and August–November) rainfall distinct from summer rainfall to the north (e.g., in the Sahara) and to the south. Investigation of one entire stalagmite, parts of two others, and a core through a fourth from M...
Article
The 4.2 ka event is widely presumed to be a globally widespread aridity event and has been linked to several episodes of societal changes across the globe. Whether this climate event impacted the cultural development in south-central China remains uncertain due to a lack of regional paleorainfall records. We present here stalagmite stable carbon is...
Article
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Identifying and explaining the end of long-lived practices is a major challenge for anthropological archaeology. We present a high-precision uranium series dating (230Th/U) chronology of an undocumented aspect of Hawaiian religion: the use of corals as offerings in gardens. Our results from the upland gardens of Kealakekua (Kona District, Hawai`i I...
Article
A continuous high-resolution record from a precisely-dated stalagmite spanning the last precessional cycle provides new insight into the dynamics of climate change from orbital to centennial scales. A 600-mm length stalagmite (LS46) collected from the Luoshui Cave, Hubei Province, Central China, was well-dated (a total of 24 ²³⁰Th dates) and high-r...
Preprint
Full-text available
Recurrent and intense climate changes during glacial periods are registered in geological records globally. A strong bipolar coupling has been revealed on the millennial timescale, while the north-south counterparts on finer timescales is less clear due to the locality of the Greenland ice core. Our high-resolution stalagmite record, which represen...
Article
Full-text available
Speleothems can provide high-quality continuous records of the direction and relative paleointensity of the geomagnetic field, combining high precision dating (with U-Th method) and rapid lock-in of their detrital magnetic particles during calcite precipitation. Paleomagnetic results for a mid-to-late Holocene stalagmite from Dona Benedita Cave in...
Article
Speleothem isotope records have been widely used in the forefront of paleoclimate researches. Although the oxygen isotope (δ¹⁸O) records of speleothems remain the most commonly used hydroclimate proxy, the carbon isotope (δ¹³C) and trace element records of speleothem have also shown their unique advantages in charactering regional-local hydroclimat...
Article
Full-text available
To interpret the climatic signals of precipitation/speleothem δ ¹⁸ O, it is critical to identify the importance of the factors affecting the precipitation δ ¹⁸ O. This study presents new stable isotope data for precipitation δ ¹⁸ O and δD in the site of Shenqi cave, southwest China, from November-2015 to October-2016 (the “Super-El Niño” event), to...
Article
The climate variability during Dansgaard-Oeschger (DO) events 19 to 25 (first recognized in the Greenland ice cores) was recorded in the Asian monsoon region, but the climatological dynamic mechanism is still poorly understood. Here, we present a new ²³⁰Th absolute chronology and high-resolution record of the Asian summer monsoon (ASM) from 117 to...
Article
High-resolution and precisely dated hydroclimate records in the southeastern Tibetan Plateau (TP) remain sparse beyond the Holocene, which hampers our ability to understand the hydroclimate variability in this important Indian summer monsoon (ISM) fringe area and its global teleconnection. Here we present 3-y resolution δ¹⁸O and δ¹³C records from a...
Article
In recent years, many researchers have studied spatial variation of summer monsoon precipitation pattern in eastern China during the last 50 years by using instrumental data. However, precisely dated high-resolution reconstructed records spanning over more than a hundred years are still sparse. Here, we present a seasonally-resolved speleothem mult...
Article
Full-text available
The tropical Pacific influences climate patterns across the globe, yet robust constraints on decadal to centennial‐scale climate variations are difficult to extract from sparse instrumental observations in this region. Oxygen isotope (δ¹⁸O) records from long‐lived corals enable the quantitative reconstruction of tropical Pacific climate variability...
Article
An anti-phased relationship between Greenland Dansgaard-Oeschger (DO) and Antarctic temperature was revealed by ice core records, and the "bipolar see-saw" mechanism has since been proposed in explanation for the interhemispheric thermal redistribution. However, limited by chronology uncertainties of ice cores, particularly the ice age-gas age diff...
Data
Here, high-resolution paleoclimatic records from 55.2 to 36.5 ka BP were reconstructed using 21 230Th/U dates and 647 sets of δ18O and δ13C data by one stalagmite HJ1 from Huangjin Cave, Hebei Province, northern China.
Article
East Asian-Pacific pattern ENSO Meteorological observations reveal an inverse relationship of summer monsoon rainfall between the tropical western North Pacific (WNP) and middle Yangtze River Valley (mid-YRV) on interannual and intraseasonal timescales. This seesaw-like pattern, named the East Asian-Pacific (EAP) pattern, is one of the major teleco...
Article
Full-text available
Speleothem calcite stable oxygen isotope (δ ¹⁸ O C ) is one of the most widely used proxies in paleoclimate research, and understanding its seasonal-annual variability is very significant for palaeoclimate reconstruction. Five-year precipitation and karst cave water from 2016 to 2021 were monitored in Shennong cave, Jiangxi Province, Southeast Chin...
Article
Full-text available
In the European Alps, the Last Interglacial (LIG, ~129–116 ka) has been primarily studied using pollen preserved in mires and lake sediments. These records document the vegetation succession across the LIG, but are poorly constrained chronologically. Here, we present a precisely dated stable isotope record for the early LIG (129.6 ± 0.4 to 125.0 ±...
Article
High-resolution ²³⁰Th ages and stable isotope (δ¹⁸O and δ¹³C) records from a stalagmite that grew between 39 and 2 ka in Incesu Cave located in south-central Anatolia allow us to evaluate paleoclimate conditions for growth periods during Marine Isotope Stage 3 (MIS3) and the Holocene. High δ¹⁸O values and Heinrich events H3 and H4 are observed duri...
Article
The middle Rhône valley, located at the southeastern margins of the Massif Central in France, produced a large number of Middle Palaeolithic sites, most of which dated to the Middle and Late Pleistocene. Due to its position, connecting northern Europe and the Mediterranean basin, this corridor and the surrounding plateaus are of particular interest...
Article
Full-text available
During glacial terminations, massive iceberg discharges and meltwater pulses in the North Atlantic triggered a shutdown of the Atlantic Meridional Overturning Circulation (AMOC). Speleothem calcium carbonate oxygen isotope records (δ ¹⁸ O Cc ) indicate that the collapse of the AMOC caused dramatic changes in the distribution and variability of the...
Article
Volcanic eruptions can cause abrupt changes in surrounding environments, but detailed sediment records of such changes are rare. The very high sediment accumulation rate in Lake Wudalianchi, a volcanic-dammed freshwater lake in northeastern China, provides an excellent opportunity for reconstructing volcanic-induced environmental change. Here we us...
Article
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The Liangzhu culture in the Yangtze River Delta (YRD) was among the world’s most advanced Neolithic cultures. Archeological evidence suggests that the Liangzhu ancient city was abandoned, and the culture collapsed at ~4300 years ago. Here, we present speleothem records from southeastern China in conjunction with other paleoclimatic and archeologica...
Presentation
Full-text available
La décomposition des dépôts de guano de chauve-souris dans les grottes produit des accumulations minérales secondaires, principalement des phosphates et des sulfates. La grotte Chameau, dans l’Oriental, est située dans les montagnes semi-arides de Bni Snassen. Elle est constituée de passages semi-actifs et fossiles, aux parois modelées par une fort...
Article
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Heinrich Stadial 4 during the last glacial period was marked by severe cooling at northern high latitudes along with the attendant changes in Asian Monsoon (Chinese Stadial 4) and South American Monsoon (South American Stadial 4). Here we present improved constraints on timings of Heinrich/Chinese/South American Stadial 4 onset and termination at s...
Article
In Alpine regions, speleothem development on karst systems largely occurs during warm interglacial or interstadial phases due to their limited growth during cold stages. Still, recent attention has been given to the role of clastic sediments in caves, less dependent on temperature conditions. Yet, only a small number of caves worldwide preserve bot...
Article
Located at the southern boundary of the tropical rainfall belt within the South Africa monsoon regime, Rodrigues Island, ∼2500 km east of East Africa, is ideally located to investigate climatic changes over the southwest Indian Ocean (SWIO). In this study, we investigate the climatic controls of its modern interannual rainfall variability in terms...
Article
Past climate archives show the Last Interglacial (LIG) period as similar to slightly warmer than current temperatures. However, there is a lack of LIG proxy evidence regarding variations of the climate across large topographic features and how this manifests at different altitudes. Here, we analysed two flowstones from Bigonda Cave, northeast Italy...
Article
The 4.2 ka Event has generally been regarded as a period of decades to at most a few centuries in which comparatively dry conditions existed in the Middle East and more broadly across the mid-latitude Northern Hemisphere. This paper presents new stable-isotopic and petrographic observations from two previously-unreported U-Th-dated stalagmites from...
Article
Full-text available
Plain Language Summary Records of past climate are essential in the Eastern Mediterranean to understand regional impacts of modern climate change. In combination with archeology, these allow us to examine climatic impacts on people in the past to help us prepare for the future. Here, we examine a stalagmite (Ko‐1) from Kocain Cave, southwest Turkey...
Article
This study presents the first high-resolution speleothem-based hydrological reconstruction for much of the last 2.7 kyr in the central-western Mediterranean. The paleohydrological information comes from a combination of five U-Th dated stalagmites from two Mallorca island caves. Interpretations are based on high-resolution records of δ¹⁸O, δ¹³C and...
Article
Because they can archive a variety of geochemical proxies and be precisely and accurately dated with the U-Th decay series chronometer, stalagmites are widely used for paleoclimate reconstructions. However, limitations in the use of this chronometer arise because U-Th dating is analytically time consuming, expensive, and requires a relatively large...
Article
Full-text available
Rapid permafrost degradation and peatland expansion occurred in Eurasia during the Early Holocene and may be analogous to the region’s response to anthropogenic warming. Here we present a 230Th-dated, multiproxy speleothem record with subdecadal sampling resolution from Kyok-Tash Cave, at the modern permafrost margin in the northern Altai Mountains...
Article
The tropics experienced a unique monsoon climate that drove important changes in socio-economic conditions and shaped different phases of human history during the late Quaternary across the Indian subcontinent. This study presents a new high-resolution speleothem-record of Indian summer monsoon (ISM) variability ranging from ~45,000 to 34,000 yr BP...
Article
Full-text available
We present absolutely dated speleothem δ¹⁸O records spanning the past ∼1.5 kyr, which provide new evidence of the transmission of an anthropogenic signal to natural climatic archives in NW Africa. Combined with three other speleothem δ¹⁸O records from SW Morocco, the results indicate unprecedentedly dry conditions during the 20th century, which dev...
Conference Paper
The last deglaciation (Termination I, T-I) was the most recent global-scale climate transition. It involved a drastic temperature increase guiding massive melting of ice sheets, with a concurrent reorganization of inter- and intrahemispherical atmospheric and ocean circulation patterns. T-I lasted ~3.0 ka (ka = kiloyears before present) in Greenlan...