Duo Wu

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Verified

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• Doctor of Science
• Professor at Lanzhou University

As anthropogenic impacts to both climate and freshwater resources continue to intensify in coming decades, an increasing number of lakes will experience carbon cycle perturbations. An examination of lakes that have experienced such perturbations for millennia can clarify the nature and severity of carbon cycle disturbances. Lakes precipitating carb...

The evolution of the human living environment on the Tibetan Plateau (TP) and its influence on human activities is a major scientific issue of multidisciplinary interest. Based on published research on past environmental changes on the TP, we synthesize changes in landscape and other environmental components, including temperature, moisture, vegeta...

Arid West Asia (AWA) is a critical hub of the Silk Road and one of the primary dust source regions in the Northern Hemisphere. Dust storms in AWA emitting substantial dust particles into the atmosphere, significantly influencing air quality, climate change and marine productivity. However, the variability of dust storm activity in this region durin...

The Qilian Mountains (QLM) act as an “ecological security barrier” in western China, impacting the downstream ecosystems and water resource utilization. However, the hydrological evolution of the QLM during the last millennium remains controversial, and their ecological response to climate change is poorly understood. We present a pH record based o...

The alpine grasslands and meadows of the Tibetan Plateau are critical for maintaining biodiversity, carbon storage, and regional ecological balance. However, the ecological response of the Tibetan Plateau to climate change and anthropogenic activity is poorly understood. We selected two alpine lakes at different altitudes on the northeastern Tibeta...

Exploring the spatiotemporal differences of hydroclimate variations is crucial for managing future climate change. In the Asian drylands, West Asia (WA) and arid central Asia (ACA) are both climatically dominated by the westerlies and have shown a dipole pattern in precipitation variation during the past several decades. However, it is unclear whet...

Reconstructing Holocene temperature evolution is important for understanding present temperature variations and for predicting future climate change, in the context of global warming. The evolution of Holocene global temperature remains disputed, due to differences between proxy reconstructions and model simulations, a discrepancy known as the ‘Hol...

摘要：印度夏季风（ISM）是全球季风系统的重要组成部分，其异常变化会对我国西南地区的生态环境和社会经济带来巨大影响。晚全新世是距离当下最近的地质历史时段，了解晚全新世以来ISM变化及其对区域水文的影响历史与规律，对预测我国西南地区未来的季风降水变化具有重要的参考价值。本文选择位于横断山区对ISM变化响应敏感的高山湖泊贡卡湖（海拔3529 m）为研究对象。在湖泊中心获取204.5 cm的连续高质量沉积岩芯（GK20B钻孔），利用陆生植物残体AMS–14C测年方法建立了过去3300年来可靠的地层年代序列。通过开展XRF元素扫描、烧失量、总有机碳氮（TOC、TN）及有机碳同位素（δ13Corg）等气候与环境代用指标的分析测试，重建了贡卡湖距今3300年以来的水文变化历史。研究结果显示贡卡湖泥炭与湖...

被称为“地球第三极”的青藏高原生态环境极其敏感脆弱. 随着人类社会的快速发展, 处于中东、南亚等人口密集区排放源下风向的青藏高原环境问题异常突出, 高原成为受污染物(含黑碳)跨境传输显著影响的区域之一. 青藏高原具有悠久的藏民族生活历史, 煨桑等宗教祭祀行为会在地质载体中留下印记, 因此, 黑碳可以作为研究宗教活动变迁的潜在指标. 本文以青藏高原东北部甘南藏族自治州的高山湖泊达尔宗圣湖为研究对象, 在对连续的沉积物岩芯利用AMS14C与137Cs测年方法建立近千年可信的年代框架基础上, 开展了黑碳分析. 研究发现 该湖沉积物黑碳主要为近距离湿沉降过程累积, 其含量变化反映了周边宗教活动的强弱变迁. 研究结果表明, 达尔宗湖所在地区近千年表现出三个宗教活动增强时期: 1490~1565CE(明...

Knowledge of temperature and precipitation variations on the northeastern Tibetan Plateau (NETP) during the recent past can improve our understanding of late Holocene regional climate change and its response to global climate change, in the past and potentially the future. Based on records of multiple geochemical indicators and branched glycerol di...

Knowledge of temperature and precipitation variations on the northeastern Tibetan Plateau (NETP) during the recent past can improve our understanding of late Holocene regional climate change and its response to global climate change, in the past and potentially the future. Based on records of multiple geochemical indicators and branched glycerol di...

The Indian summer monsoon (ISM) is an important part of the global monsoon system. In southwestern China, the abnormal variations of the ISM not only cause abrupt changes of the climate and the ecological environment, but also bring huge economic losses to the society. The late Holocene is the most recent period in geological history. Therefore, un...

Uncertainty regarding the timing of the highest Holocene water level of enclosed Dali Lake in northern China has led to controversy about whether the East Asian summer monsoon (EASM) peaked in the early Holocene or the mid-Holocene. Therefore, a record combining a reliable chronology with unambiguous lake level indicators is essential to resolve th...

The ecological environment of the Tibetan Plateau, known as the “Third Pole of the Earth”, is extremely sensitive and fragile. With rapid societal development, environmental problems on the Tibetan Plateau have become prominent, as it is downwind of the emission sources from densely populated areas in the Middle East and South Asia, and the plateau...

The ecological environment of the Tibetan Plateau, known as the “Third Pole of the Earth”, is extremely sensitive and fragile. With rapid societal development, environmental problems on the Tibetan Plateau have become prominent, as it is downwind of the emission sources from densely populated areas in the Middle East and South Asia, and the plateau...

There is much debate regarding the temporal and spatial pattern of hydroclimate variations on the Tibetan Plateau during the Holocene, focusing especially on the dipolar pattern of precipitation and moisture between the southern and northern regions, on multiple timescales. Modern observations reveal that the δ¹⁸O in precipitation is an integrated...

As the “Third Pole” of the Earth, the Tibetan Plateau is sensitive to global climate change. Interactions between the Asian monsoon and the Westerlies systems control climatic and environmental changes in the Tibetan Plateau, resulting in an out-of-phase pattern of precipitation variation between the northern and the southern Tibetan Plateau on dec...

Global warming and human activities have significantly increased the wildfire risk in highly populated subtropical East Asia over recent decades; however, the factors driving fire occurrence on multiple timescales remain unclear. We present and analyze an observational dataset of fire for the Yunnan Plateau in southwestern China for the past 20 yea...

Accelerated soil erosion and trace metal pollution in aquatic environments have become a pervasive aspect of global environmental changes during the Anthropocene, threatening food security and ecosystem viability. Long-term records of these processes can promote an improved understanding of their timing, amplitude, and environmental impacts. Here w...

The exceptionally-rich fossil record available for the equid family has provided textbook examples of macroevolutionary changes. Horses, asses and zebras represent three extant subgenera of Equus lineage, while the Sussemionus subgenus is another remarkable Equus lineage ranging from North America to Ethiopia in the Pleistocene. We sequenced 26 arc...

The lower reaches of the Yangtze River have a long history of human occupation and rice cultivation, but our understanding of human activities in the mountainous region south of the lower Yangtze is still limited. In this study, we present a high-resolution vegetation record spanning the past 2900 years from the Southeast Hills of China by analyzin...

Knowledge of the past interactions between climate and human land use is essential for understanding the possible future relationships between global change and human societies. In this study, we used pollen and other multi-proxy analyses of the sediments from Xingyun Lake in central Yunnan Plateau to reconstruct the history of land use and ecosyst...

Lakes are one of the most important freshwater resources on Earth and they provide a wide range of ecosystem services. However, due to rapid economic development and the intensification of human activities, many lakes have become eutrophic, which may threaten their status as water resources. Human activities have played a significant role in lake e...

The nature of the interaction between prehistoric humans and their environment, especially the vegetation, has long been of interest. The Qinghai Lake Basin in North China is well-suited to exploring the interactions between prehistoric humans and vegetation in the Tibetan Plateau, because of the comparatively dense distribution of archaeological s...

GIS 手段 分析发现古梯田面积为 42.2 km 2 (约 63000 亩) ， 主要分布在盆地内央曲河及其支流两侧海拔 2936~3326 m 间的山坡上。通过对 3 个古梯田剖面样品的磁化率、 总有机碳/氮 (TOC、 TN) 含 量、 孢粉、 粒度等环境代用指标分析， 同时对比具有准确年代控制的自然剖面磁化率与粒度。 研究结果显示： 梯田开垦于晚全新世 (距今 3000 a) 古土壤， 梯田剖面顶部 25~35 cm 不同于自然 剖面而呈均一化的指标证实了耕作层的存在 (距今约 1000 a 以下层位) ； 但耕作层之上 TOC、 TN 含量的增多， 以及梯田剖面与自然剖面整体一致的指标变化趋势说明了梯田被短期利用后 长期废弃； 结合历史文献资料推断夏河古梯田是在北宋 "弓箭手屯田"...

Contaminated legacy sediments contribute to modern pollution loadings, particularly trace metals. These contributions are challenging to quantify as metal histories reconstructed from sediment records cannot be easily divided into legacy and concurrent contamination. In particular, the contribution from re-mobilization and delivery of legacy metals...

Although Holocene-scale trends in Indian Summer Monsoon (ISM) variability have been well-established, manifestations and drivers of centennial-and multi-decadal-scale variability are still debated. Additionally, the extent to which proxies reflect abrupt climatic changes rather than proxy-specific thresholds is unclear. To address these questions,...

As the cradle of Chinese civilization the Chinese Loess Plateau (CLP) and its climatic and environmental history have attracted much research attention; however, the spatial characteristics of Holocene climatic conditions across the CLP remains unclear. We investigated five loess sections from the Ganjia Basin in the western CLP, and used paleoclim...

The exceptionally-rich fossil record available for the equid family has provided textbook examples of macroevolutionary changes. Horses, asses and zebras represent three extant subgenus of Equus lineage, while the Sussemionus subgenus is another remarkable Equus lineage ranging from North America to Ethiopia in Pleistocene. We sequenced 26 archaeol...

Global warming is having a profound influence on vegetation and biodiversity patterns, especially in alpine areas and high latitudes. The Qinling Mountain range is located in the transition zone between the temperate and subtropical ecosystems of central–east China and thus the vegetation of the area is diverse. Understanding the long-term interact...

Global climate change and human activities have significantly impacted lake ecosystems at an accelerating rate in recent decades, but the differences between the responses of lake ecosystems to these two stressors remain unclear. Thus an improved understanding of the long-term influences of climatic and anthropogenic disturbances is necessary for t...

Available online xxx Handling Editor: P Rioual Keywords: Daye lake Water depth reconstruction Precipitation pattern Little ice age %Cren a b s t r a c t Alpine lakes are natural rain gauges, and reconstructing changes in their water level is a key to understanding the regional hydrological environment, climate change and vegetation evolution. Preci...

Knowledge of the paleoclimatic record of the northeastern Tibetan Plateau (NETP) can potentially improve our understanding of the evolution of the Asian summer monsoon (ASM). However, the history of climate change and inferred spatial extent of the ASM on the NETP since the last deglaciation remain unclear. Here, we use several environmental proxie...

The northeastern Qinghai‐Tibet Plateau is strongly influenced by the East Asian summer monsoon (EASM), the Indian summer monsoon (ISM) and the westerlies. However, how these various circulation systems interacted in the region during the Holocene, and the nature of the associated environmental impacts, are unclear and even controversial. Here we pr...

Physical geography is a basic research subject of natural sciences. Its research object is the natural environment which is closely related to human living and development, and China’s natural environment is complex and diverse. According to national needs and regional development, physical geographers have achieved remarkable achievements in appli...

It is unclear whether the Holocene climatic optimum (HCO) occurred synchronously throughout the East Asian summer monsoon (EASM) region, and if it did, whether it occurred in the early Holocene (EH, 11.7–8.0 ka, ka = 1000 years before present, where the “present” is defined as the year CE 1950), or in the middle Holocene (MH, 8.0–4.0 ka). This is b...

Local wild bovids have been determined to be important prey on the northeastern Tibetan Plateau (NETP), where hunting game was a major subsistence strategy until the late Neolithic, when farming lifestyles dominated in the neighboring Loess Plateau. However, the species affiliation and population ecology of these prehistoric wild bovids in the preh...

Significance We undertook an ancient genomic DNA investigation of large animal remains dated ∼5,200 y B.P. from the Tibetan Plateau. We provide compelling evidence that the present-day low-latitude tropical inhabitants Bos gaurus and Dicerorhinus sumatrensis once roamed as far north as the margin of the northeastern Tibetan Plateau (NETP) during th...

The Ganjia Basin in Xiahe County, Gansu Province, China, is located on the northeastern edge of the Tibetan Plateau. The area lies in the transitional zone between the Plateau ethnic groups dominated by ancestral Tibetans, and the Central Plains dynasties dominated by ancestral Han in history. The Ganjia Basin is therefore well suited to studying t...

The natural environment provides material essentials for human survival and development. The characteristics, processes, regional differentiation and forcing mechanisms of the elements of the natural environment (e.g. geomorphology, climate, hydrology, soil, etc.) are the main objects of research in physical geography. China has a complex natural e...

Total organic carbon (TOC) content of lacustrine sediments has been widely used in the climatic and environmental studies as a proxy of productivity in the catchment and lake water; it is also used as an index of monsoon precipitation in the regions dominated by the Asian summer monsoon. In the present paper, we summarized the variation characteris...

The patterns of Holocene moisture variability inferred from different proxies remain controversial in the northeastern Tibetan Plateau (NETP), which impedes our understanding of the behavior and dynamics of the East Asian Summer Monsoon (EASM). Here we present two pH records spanning the last ~12 kyr from well-dated loess-paleosol sections (YWY14 a...

Proxy-based reconstructions of Holocene temperature show that both the timing and magnitude of the thermal maximum varied substantially across different regions. Given the 'Holocene temperature conundrum', it is becoming increasingly important to reconstruct seasonal temperature variations. As a major component of the global monsoon system, the Ind...

We present a pollen-based precipitation reconstruction and multi-proxy records from a 485-cm-long sequence from a sediment core from Xingyun Lake, Yunnan Plateau, south-west China, which depicts the evolution of the Indian Summer Monsoon (ISM) during the last 8500 years. Pollen and other palaeoenvironmental records document several stages of vegeta...

Proxy-based reconstructions of Holocene temperature show that both the timing and magnitude of the thermal maximum varied substantially across different regions. Given the 'Holocene temperature conundrum', it is becoming increasingly important to reconstruct seasonal temperature variations. As a major component of the global monsoon system, the Ind...

The use of pollen analysis to reconstruct regional vegetation changes, and subsequently climate, is a common approach in paleoclimatic reconstruction. However, it is unclear whether or not vegetation exhibits a lagged response to climate change during shifts from rapid cooling to rapid warming. The Younger Dryas (YD) cold event, spanning the last g...

Modern pollen data from topsoils and surface lake sediments are commonly used as modern analogues and as climate calibration data for reconstructing vegetation and climate history from fossil pollen profiles. However, the potential differences and biases in pollen assemblages from these two sample types, as well as the processes of pollen sedimenta...

Climatic and environmental changes in the northeastern Tibetan Plateau are controlled by the Asian summer monsoon (ASM) and the westerlies, two key circulation components of the global climate system which directly affect a large human population and associated ecosystems in eastern Asia. During the past few decades, a series of Holocene palaeoclim...

Changes in the status of freshwater resources are a topic of major global, regional and local concern. This is especially so in the arid and semi-arid regions of China, where shortage of water resources plays a crucial role in limiting sustainable socioeconomic development, as well as in sustaining natural ecosystems. Recent climate change, as well...

Chronology is a necessary component of paleoclimatology. Radiocarbon dating plays a central role in determining the ages of geological samples younger than ca. 50 ka BP. However, there are many limitations for its application, including radiocarbon reservoir effects, which may cause incorrect chronology in many lakes. Here we demonstrate temporal c...

Palaeoflood hydrology, as an extended field of flood disaster research, has gained great achievements based on sedimentary records extracted from rivers. However, these river palaoeflood studies have limitations due to the short duration and incompleteness of sedimentary records. Lake sediments as a more efficient archive,however, often record a te...

We present a pollen-based precipitation reconstruction and multi-proxy records from a 485-cm-long sequence from a sediment core from Xingyun Lake, Yunnan Plateau, south-west China, which depicts the evolution of the Indian Summer Monsoon (ISM) during the last 8500 years. Pollen and other palaeoenvironmental records document several stages of vegeta...

We report mineral magnetic measurements (magnetic susceptibility, anhysteretic and isothermal remanence, magnetic hysteresis and thermomagnetic properties) from a 2.46-m-long sediment core taken in Xingyun Lake, Yunnan, China. Results demonstrate that magnetic minerals in the lake sediment are dominated by stable single-domain (SSD) ferrimagnetic m...

We present a pollen-based precipitation reconstruction and multi-proxy records from a 485-cm-long sequence from a sediment core from Xingyun Lake, Yunnan Plateau, south-west China, which depicts the evolution of the Indian Summer Monsoon (ISM) during the last 8500 years. Pollen and other palaeoenvironmental records document several stages of vegeta...

We present a pollen-based precipitation reconstruction and multi-proxy records from a 485-cm-long sequence from a sediment core from Xingyun Lake, Yunnan Plateau, south-west China, which depicts the evolution of the Indian Summer Monsoon (ISM) during the last 8500 years. Pollen and other palaeoenvironmental records document several stages of vegeta...

Environmental magnetic measurements were carried out on the samples of indoor dustfall collected from Qiyun building at different heights in Lanzhou University. The results indicate a high concentration of magnetic minerals in indoor dustfall, dominated by pseudo-single domain (PSD) and multiple domain (MD) ferrimagnetic minerals which are mainly f...

The evolution of arid environments in northern China was a major environmental change during the Quaternary. Here we present the dating and environmental proxy results from a 35 m long core (A-WL10ZK-1) collected from the Ulan Buh Desert (UBD), along with supplemental data from four other cores. The UBD is one of the main desert dunefields in China...