Zhiyong Han

• Doctor of Philosophy
• Professor (Associate) at Nanjing University

（Here is the personalized Share Link providing 50 days' free access to the article: https://authors.elsevier.com/a/1j3MH3HcE1r1yO） The soil organic carbon isotope indicator (δ13Corg) is widely used in paleoecology and paleoclimate reconstruction due to its ability to record the history of paleovegetation change. Although it has been used as a proxy...

https://www.lyellcollection.org/token/ARSNDEM2JWAUB7HKSEME/Eprints. Fluvial terraces are important archives for inferring changes in river dynamics. In the northeastern Tibetan Plateau (NETP), the Huangshui River flows through broad depressions and narrow gorges. This morphology is the result of strike-slip- and reverse-faulting. The differential v...

The cycle of precipitation change is key to understanding the driving mechanism of the East Asian summer monsoon (EASM). However, the dominant cycles of EASM precipitation revealed by different proxy indicators are inconsistent, leading to the “Chinese 100 kyr problem”. In this study, we examine a high-resolution, approximately 350,000-year record...

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The unique desertification processes occurring under the Alpine climate and ecosystem on the Tibetan Plateau could provide critical clues to the natural and anthropogenic impacts on desertification. This study used the Landsat data to investigate the spatial and temporal distribution of desertification from 1990 to 2020 in two areas (Shannan and Ma...

The Jinsha River, upstream of the Yangtze River, flows through the southeastern margin of the plateau, providing an opportunity to study the plateau uplift relative to the Sichuan basin through fluvial geomorphology. Eight tributaries of the Jinsha River located at the transition boundary from the plateau to the basin were analyzed for the feature...

The authors regret, to inform that there was an error in Fig. 9. This figure has now been correctly represented below.[Formula presented] The authors would like to apologise for any inconvenience caused.

The cycle of precipitation change indicated by different proxy indicators are found to be inconsistent, which results in the “Chinese 100-kyr Problem”. The loess deposited in the past ~350 ka at the low latitude of East Asia is measured here. We find that the magnetic susceptibility varied at 100-kyr and 40-kyr cycles, can be interpreted as proxy f...

There is great controversy regarding variations in the East Asian summer monsoon (EASM) during the Holocene. Simulations and modern observations have revealed that a strengthened EASM results in more precipitation in the monsoon marginal zone. Therefore, quantitative reconstruction of precipitation in this region is the key to revealing monsoon var...

Dithionite-citrate-bicarbonate (DCB) treatment is a classical method for removing iron oxides from soil. The DCB-induced dissolution effects on iron oxides are controversial. In this paper, samples from a typical loess-paleosol sequence in the Chinese Loess Plateau (CLP) and from other aeolian dust deposits in southern China were collected, and cha...

Vegetation is usually sparse in the desert regions, but it plays important roles in stabilizing sand dunes and combating desertification. Establishing how desert vegetation responds to changes in both natural forcing and anthropogenic interference is essential for better understanding desertification processes and their future dynamics. In this stu...

Parabolic dunes can transform from and into other types of dunes in response to environmental changes. The sand hills, including some parabolic dunes, on the shore of Poyang Lake mainly accumulated during the Last Glaciation and are rare inland aeolian landforms in the humid monsoon climate zone in East China. However, the characteristics, distribu...

Confined by the eastern and western boundary faults, Lu Mountain has long been considered a block mountain uplifted due to Mesozoic and Cenozoic crustal deformation in East China. However, the formation and evolution of this block mountain are still debated. In this study, the eastern boundary fault is investigated to confirm the tectonic style of...

Variability in East Asian summer monsoon precipitation during the Holocene remains of debate. In this study, we use a closed lake with well‐dated lake beach ridges located on the margin of the East Asian summer monsoon, a region highly sensitive to monsoon precipitation changes, to obtain a temporal sequence of water volume in North China. The elev...

The Hunshandake Sandy Land (Hunshandake) in central Inner Mongolia, China, is located within the fringe of the East Asian summer monsoon (EASM) domains. Precipitation records in Hunshandake are essential to studying the migrations of the EASM. This work reproduced the precipitation changes since the Last Glacial Maximum (LGM) by measuring the magne...

The Hunshandake Sandy Land, which is highly sensitive to climate change, is located in North China along the margins of the area influenced by the East Asian monsoon. The upper reach of the Xilamulun River, which drains the Hunshandake Sandy Land, provides an opportunity to test the response of a river landform within a sandy region to climate chan...

The Xiashu loess is a typical Quaternary eolian deposit in southern China and represents an important terrestrial paleoclimate archive in this low-latitude monsoon region. However, the chronological framework of Xiashu loess deposition has yet to be established. Determining the timing of the onset of Xiashu loess deposition will allow researchers t...

Paleo-dune deposits have been widely used as a proxy indicator of past dune activity, which is further used to reconstruct paleoclimates. However, recent studies have critically examined the reproducibility of dune chronologies and the complexity of paleo-dune deposits as paleoenvironmental records. This paper addresses questions on the paleoenviro...

Loess deposits in Xiashu are representative of such deposits in Southeastern China that are mainly distributed in the middle and lower reaches of the Yangtze River valley. These loess-paleosol sequences provide a key archive of past climate change in humid, subtropical regions. However, the ages of the sequences are not well constrained. In this st...

Geomorphologically, alluvial deposits in river systems are expected to be older on higher terraces than on the lower terraces. However, loess deposits of aeolian origin may also occur on the surface of terrace systems and as seen in the Chinese Loess Plateau (CLP). Such loess is continuously, rather than episodically deposited. This study presents...

The stream power model was applied to Lushan Mt. in South China in order to verify its capability of interpreting the uplift of a small block mountain. On a log-log plot, the longitudinal profiles of 9 rivers derived from a 30m DEM exhibit primary characteristics similar to those derived from a 5m DEM; however, the 5m DEM clearly reveals more minor...

The Luonan Basin, located in the transitional zone between temperate and subtropical China, is an important locality for human evolution during the early to middle Pleistocene. The loess deposits in the Luonan Basin contain numerous in situ lithic artifacts; the deposits also constitute suitable material for dating the artifacts and are potentially...

There has been a significant debate about the nature and causes of the Pleistocene evolution of the Nihewan Basin, North China. We studied the eastern Nihewan Basin sedimentary facies at two main sites, Hutouliang and Donggou. A combination of field observations and measurements of sediment grain-size distribution was used to reconstruct the sequen...

Geological records of climate change since the last glaciation in South China, a core area of the East Asian monsoon, are key to understanding secular variation in the monsoon system. However, with the exception of the speleothems, records from this area with independent age control are few. We investigated aeolian sand deposition on a sand hill on...

In this study, we extracted nine river profiles from a 5-m DEM of the Mt. Lushan region. Knickpoints of two types, namely the vertical-step knickpoint and the slope-break knickpoint, are recognized, and are compared with the geological settings to determine their origins. At the same time, we calculated the channel steepness index (ksn) and concavi...

The response of surface processes to global climatic changes since the last glacial is critical to understanding the mechanism of climatic changes on the Tibetan Plateau. In this study, loess from the northeastern Tibetan Plateau (NETP) was dated to provide an independent high-resolution record of dust accumulation processes and millennial-scale cl...

Aptian–Albian sediments in Core 12X of Hole 1049C (ODP Leg 171B) are characterized by high-frequency cycles that consist of alternating layers of red and green/white clayey chalk, and claystone. The first derivative curves of diffuse reflectance spectra (DRS) for samples of different colors reveal that red (brown and orange) samples show clear peak...

Aptian-Albian sediments in Core 12X of Hole 1049C (ODP Leg 171B) are characterized by high-frequency cycles that consist of alternating layers of red and green/white clayey chalk, and claystone. The first derivative curves of diffuse reflectance spectra (DRS) for samples of different colors reveal that red (brown and orange) samples show clear peak...

Sand hills are mainly composed of aeolian sands developed along the north shore of the Poyang Lake. The sand hill at Shaling is situated in Liaohua town of Xingzi county. The relative height of this sand hill is about 100 m and it covers an area of about 10 km2. Ridgslike landform develops on the side facing the Poyang Lake. These ridges trending t...

The magnetic susceptibility of the Xiashu loess of several layers in Dagang section in Zhenjiang anomalously decreases, which results in a poor correlation of the susceptibility record with its counterpart in North China. In order to explore the cause of the anomalous decrease, we drilled the ZK core in Dagang. Ten representative samples are collec...

The chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang are studied in this paper. (1) The Xiashu loess profile underwent moderate chemical weathering. It seems that the precipitation is a more important factor than the temperature in controlling the process of the chemical weathering. (2) The major...

The Donggou Section located in the east of Nihewan basin contains a suite of strata consisted mainly of lacustrine sediments approximate to 100 m thick. Both grain size distribution and magnetic susceptibility are measured in successive samples collected from this section. A preliminary time scale can be derived, based on the comparison between rec...

The Nihewan Beds at Yangyuan reflect apparently continuous, high-resolution deposition of fluvial-lacustrine sediment in the climatically important loess deposit regions of north China. The Hutouliang section forms the upper portion of Nihewan Beds deposited during the Brunhes magnetic polarity chron. Lightness values measured on successive samples...

The Nihewan Beds at Yangyuan reflect apparently continuous, high-resolution deposition of fluvial-lacustrine sediment in the climatically important loess deposit regions of north China. The Hutouliang section forms the upper portion of Nihewan Beds deposited during the Brunhes magnetic polarity chron. Lightness values measured on successive samples...

An enhancement of the TL sensitivity at ∼400°C in granitic quartz with accumulated radiation dose is observed. Studies of dose-rate effects and HF etching suggest that alpha radiation is the dominated source for creating such enhancement. HF etching for 100min can remove the outer layer of quartz grains, irradiated by alpha particles from other min...

Thermoluminescence (TL) traps in granitic quartz are potential geochronometers for ages of up to billions years. TL sensitivity is believed to be a measure of the population of TL traps. Their lifetimes can be roughly estimated either by isothermal annealing or by an empirical approach. The former is applicable to radiation sensitive traps correspo...

A TL sensitivity change can usually be observed after the quartz sample is heated to a high temperature. The change of 110°C TL peak or PTTL was reported to be an increase in many studies. The change of TL sensitivity of other TL peaks, mainly 150 and 375°C, with annealing treatments was demonstrated in this study. Two types of TL sensitivities in...

A trap model is introduced to describe the behaviours of both thermally sensitive and radiation sensitive TL traps. The former are relatively shallow traps. The latter are deep traps, in which population increases with exposure to alpha dose. Thermal decay of both types of traps at ambient temperature is dependent on the trap lifetimes. A trap's po...

Granite and mylonitic samples with an age range of 11-3300 Ma were collected from different regions of China. Several luminescence signals were measured from the extracted quartz. Age-dependence has been observed in their luminescence signals, including the sensitivity of the 110°C TL-peak, the temperature of the high-temperature TL peak and the re...