Yu Li

Yu Li
Lanzhou University | LZU · School of Earth and Environmental Sciences

Ph.D.

About

83
Publications
21,273
Reads
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1,453
Citations
Citations since 2016
46 Research Items
1130 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Additional affiliations
January 2016 - April 2016
University of Utah
Position
  • Researcher
September 2014 - October 2014
Hokkaido University
Position
  • Visiting scholor
May 2014 - present
Lanzhou University
Position
  • Professor (Full)
Description
  • Paleo-monsoon dynamics; Long-term lake evolution

Publications

Publications (83)
Article
Full-text available
The Asian summer monsoon (ASM), controlled by tropical ocean‐atmosphere systems, and the westerlies, directly linked to high‐latitude climates, interact in mid‐latitude East Asia. Located at a climate junction, the northeastern Qinghai‐Tibetan Plateau (QTP) is a sensitive zone for the interaction of the westerlies and ASM. In the current work, we p...
Article
Aeolian landscapes dominate the semiarid dune fields across the Asian summer monsoonal boundary (ASMB) of northern China, where the widespread palaeosols are usually regarded as indicators of enhanced monsoonal precipitation (moisture) during the Late Quaternary. However, the processes of palaeosol development, and their response to climate change,...
Article
Full-text available
Global paleomonsoon precipitation evolution is confined to asynchronous responses to global monsoons to shared forcings, including summer insolation, sea surface temperature, atmospheric circulation coupling, and ocean circulation. However, most studies are based on conclusions drawn from single or a few discrete records or deduced from top-down cl...
Preprint
We present the first gridded and temporally continuous quantitative pollen-based plant-cover reconstruction for temperate and northern sub-tropical China over the Holocene (11.7 ka BP to present) using the Regional Estimates of Vegetation Abundance from Large Sites (REVEALS) model. The objective is to provide a dataset of pollen-based land cover fo...
Article
Full-text available
Due to global warming, dry-wet condition of the Qilian Mountains has experienced significant change in recent decades. Thus, predicting future climate change is critical for studies on the environmental evolution. To explore the climate trends under increasing temperature, we took the millennial-scale Middle Holocene Warm Period and the centennial-...
Article
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Mostly concurring with arid and semi-arid regions, closed basins are faced with water scarcity, prominent imbalance between water resource supply and demand, and ecological degradation. Spatial-temporal patterns of water resource change in closed basins have received increasing attention in recent years, but it is still unclear whether there is a c...
Article
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Much dissolved inorganic carbon (DIC) may exist in lacustrine carbonates in the terminal lakes of closed basins in arid areas, and inorganic carbon sinks in arid regions are an important hypothesis of global carbon cycle research in recent years. Previous studies have made significant progress in estimating the inorganic carbon content. However, th...
Article
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The westerly winds and East Asian summer monsoon play a leading role in climate change of southwestern North America and eastern Asia since the Last Glacial Maximum (LGM), respectively. Their convergence in arid and semi-arid regions of the Asian continent (AAC) makes the regional climate change more complicated on the millennial-scale. There are s...
Article
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Water shortage has plagued the social development and human well-being of global closed basins. However, the hydroclimate research on different time scales in these regions remains inadequate at a global scale. In this paper, the hydrological responses from global closed basins to millennial-scale and centennial-scale cold/warm events since the Las...
Preprint
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Previous studies argued that climate change modes from East and Central Asia (EA and CA) are out of phase at multi-time scales. However, in recent years, dry/wet changes in CA which contradict traditional views have provoked further discussion. The synchronization of rain and heat periods is a common climate phenomenon in most regions of East and C...
Article
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Investigating the response mechanisms of long‐term global wet/dry pattern changes to cold/warm periods and climate forcings can provide scientific supports for the projection of future wet/dry patterns in the context of global warming. Here we present a systematic assessment into the response of global wet/dry patterns to cold/warm periods since th...
Article
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Background Closed basins occupy 21% of the world’s land area and can substantially affect global carbon budgets. Conventional understanding suggests that the terminal areas of closed basins collect water and carbon from throughout the entire basin, and changes in lake organic carbon sinks are indicative of basin-wide organic carbon storages. Howeve...
Article
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The production, transport, and deposition of dust has profound impacts and feedbacks on the regional and global environments. In parallel, the Tibet Plateau (TP) plays an important role in East Asian and global climate systems. Previous studies have shown that the dust can reach the plateau by long-distance transport from the westerlies and by shor...
Article
Full-text available
Global closed basins, occupying almost one fifth of the world's land area, spatially coincide with arid and semiarid areas. Paleoclimatic proxies can indicate basin-wide environmental change and human activity. However, previous studies have not approached the use of proxies in the same way to reconstruct natural and anthropogenic processes at regi...
Article
Climate change modes between East Asia and southwestern North America are interlinked; however, little research has been done in comparing the underlying mechanisms between time scales. Here we present a comprehensive study using modern observations, paleoclimate records, and PMIP3/CMIP5 simulations to investigate the multi-timescale wet/dry change...
Article
Full-text available
The monsoon system and westerly circulation, to which climate change responds differently, are two important components of global atmospheric circulation interacting with each other in the middle to low latitudes. Relevant research on global millennial-scale climate change in monsoon and westerly regions is mostly devoted to multi-proxy analyses of...
Article
Climate change from the northern Qinghai-Tibet Plateau (QTP) is affected by the combined effects of the Asian summer monsoon and the westerlies. However, changes in monsoon vapor transport and the westerly jet stream, as well as their effect to climate change mode there, are not clear at different time scales. Here we present composite research usi...
Article
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Closed basins, mainly located in subtropical and temperate drylands, have experienced alarming declines in water storage in recent years. An assessment of long-term hy-droclimate change in those regions remains unquantified at a global scale as of yet. By integrating lake records, PMIP3-CMIP5 simulations and modern observations, we assess the wet-d...
Article
The ocean plays a crucial role in the global and regional climate. Many regional monsoon climates are inter-linked by ocean currents and sea surface temperature (SST). The climate link between the East Asian and North American continent has been proposed and verified by many studies. A widely accepted hypothesis is that the precipitation of the mon...
Preprint
Full-text available
Abstract. Monsoon system and westerly circulation, to which climate change responds differently, are two important components of global atmospheric circulation, interacting with each other in the mid-to-low latitudes and having synergy effect to those regions. Relevant researches on global millennial-scale climate change in monsoon and westerlies r...
Article
The fluctuation of a single lake level is a comprehensive reflection of water balance within the basin, while the regional consistent fluctuations of lake level can indicate the change of regional effective moisture. Previous researches were mainly focused on reconstructing effective moisture by multiproxy analyses of lake sediments. We carried out...
Preprint
Full-text available
Abstract. Closed basins, mainly located in subtropic and temperate drylands, have experienced alarming decline in water storage in recent years. However, a long-term assessment of hydroclimate changes in the region remains unquantified at a global scale. By intergrating the lake records, PMIP3/CMIP5 simulations and modern observations, we assess th...
Article
Full-text available
In an attempt to quantify Holocene anthropogenic land-cover change in temperate China, we 1) applied the REVEALS model to estimate plant-cover change using 94 pollen records and relative pollen productivity for 27 plant taxa, 2) reviewed earlier interpretation of pollen studies in terms of climate- and human-induced vegetation change, and 3) review...
Article
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The East Asian monsoon exerts a profound influence on environmental change in the East Asian region. Various factors have been hypothesized as the dominant Asian monsoon forcings, however, the forcings can change from interannual to millennial timescales. The linkages between monsoon forcings at different timescales remain unclear. To better unders...
Article
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Hydrological circulation, as the most basic material cycle and active natural phenomenon on earth, exerts a significant influence on climate change. The mid-Holocene is an important period to better understand modern environmental change; however, little research has focused on its quantitative simulation of paleo-hydrological process. In this rese...
Article
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Studying past climate change has important scientific significance in exploring long-term climatic variability, assessing the nature and human’s contribution to climate warming, and predicting future climate change. Here, we presented a data synthesis of pollen records, organic geochemical proxies, as well as lake-level records, along with numerica...
Article
China is the country with the most population in the world, and its climate is extremely diverse due to tremendous differences in latitude, longitude, and altitude, ranging from tropical in the far south to subarctic in the far north and alpine in the higher elevations of the Qinghai-Tibetan Plateau. Accurate assessment of its modern climate change...
Article
Full-text available
Marine oxygen isotope stage 5a (MIS 5a), MIS 3a, and Holocene were highlighted periods in paleoclimate studies. Many scientists have published a great number of studies in this regard, but they paid more attention to qualitative research, and there was often a lack of quantitative data. In this paper, based on chronological evidence from a paleolak...
Article
Full-text available
With a view to the local geographical environment and terrain factors, the relationship between debris flow distribution and topographic factors in Lanzhou were quantitatively analyzed, using documents , meteorological data, physical geographic data, digital elevation models, GIS technology as well as the Logistic model. The results showed that, du...
Article
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Arid and semi-arid ecosystems are increasingly recognized as important carbon storage sites. In these regions, extensive sequestration of dissolved inorganic carbon can occur in the terminal lakes of endorheic basins—basins that do not drain to external bodies of water. However, the global magnitude of this dissolved inorganic carbon sink is uncert...
Article
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Atmospheric particulate matter (PM 2.5 and PM 10) can adversely affect human health and also has impacts on climate and precipitation. Much research has been done on the transport of human-made fine-grained matter in modern times. It is still unclear, though, what controls the transport process of fine-grained sediment from natural sources on the m...
Article
Basin-wide sediment transport affects estimates of basin sediment yield, which is a fundamental scientific issue in drainage basin studies. Many studies have been conducted to examine erosion and deposition rates in drainage networks. In this study, we proposed a new approach using grain-size standard deviation model of sedimentary samples from dif...
Article
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In order to investigate the spatial-temporal evolution pattern and potential driving mechanism of lakes on a long time-scale, based on the Köppen climate classification, we classify Chinese climate as 4 climate zones, 6 climatic types and select 34 lakes which have reliable dating, and its lake records have certain continuity since the Last Glacial...
Article
Millennial-scale variations in the Asian monsoon vapor transport are always associated with long-term changes in monsoon rainfall according to the conventional understanding. However, recent advances in monsoon studies suggested that regional monsoon rainfall has different responses to monsoon vapor transport. This paper presents a comparison betwe...
Article
This study addressed the lake evolution of the Juyanze paleolake with the goal of calculating precipitation and evaporation during 34−26 cal kyr BP, which will aid evaluation of the reliability of using lake level changes to assess past changes in climate. Fourteen paleoshorelines were recognized at the Juyanze paleolake, and 14C dating results sho...
Article
Full-text available
Verification of restoration policies that have been implemented is of significance to simultaneously reduce global environmental risks while also meeting economic development goals. This paper proposed a novel method according to the idea of multiple time scales to verify ecological restoration policies in the Shiyang River drainage basin, arid Chi...
Article
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In inland drainage basins, many studies have been conducted regarding the geomorphologic evolution processes in the upper and lower reaches, few of them have been done on the middle reaches, which are the pivotal areas connecting the erosion effects of the upper reaches and the deposition processes in terminal areas. In this study, we presented a m...
Article
Full-text available
In the Asian monsoon margin of northwest China, millennial-scale precipitation and effective moisture changes during the Holocene differ from those observed in the primary monsoon area. Whether these differences were caused by a change in precipitation or other hydroclimate factors remains controversial. We selected Huahai Lake, located in the west...
Article
Monsoon precipitation over China exhibits large spatial differences. It has been found that a significantly enhanced East Asian summer monsoon (EASM) is characterized by increased rainfall in northern China and by reduced rainfall in southern China, and this relationship occurs on different time scales during the Holocene. This study presents resul...
Article
Monsoon precipitation over China exhibits large spatial differences. It has been found that a significantly enhanced East Asian summer monsoon (EASM) is characterized by increased rainfall in northern China and by reduced rainfall in southern China, and this relationship occurs on different time scales during the Holocene. This study presents resul...
Article
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The geomorphic evolution of different parts of the Shiyang River catchment was analyzed in this study, using Quaternary chronologies, sedimentary facies, grain size, geochemical proxies, and pollen proxies of sedimentary sections and study sites to examine millennial-scale geomorphic processes. Results indicate that during the early and middle Holo...
Article
Full-text available
The East Asian winter monsoon (EAWM) exhibits significant variability on intraseasonal, interannual, and interdecadal time scales and the variability can be extended to Holocene centennial and millennial scales. Previous Holocene EAWM proxy data records, which were mostly located in Central, Eastern and Southern China, did not show a consistent Hol...
Article
Full-text available
Citation: Li Y, Zhou XH, Zhang CQ, et al., 2014. Relationship between pollen assemblages and organic geochemical proxies and the response to cli‐ mate change in the Zhuye Lake sediments. Sciences in Cold and Arid Regions, 6(1): 37–43. ABSTRACT This paper examines the relationship among organic geochemical proxies (TOC, C/N ratio and δ 13 C) and pol...
Article
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The intensified monsoon increases summer rainfall and creates wet conditions in the Asian summer monsoon region during the early Holocene. Along with millennial-scale changes of the monsoon intensity, it is still unclear whether the boundary of the monsoon region changes according to monsoon variability. Investigations into the early Holocene envir...
Article
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Ecosystem response to climate change in high-altitude regions is a focus on global change research. Picea/Abies forests are widely distributed at high altitudes of East and Central Asia, and their distribution changes are sensitive to climate change. Humidity is an important climatic factor that affects high-altitude ecosystems; however, the relati...
Article
Full-text available
The mid-latitudes of East Asia are characterized by the interaction between the Asian summer monsoon and the westerly winds. Understanding long-term climate change in the marginal regions of the Asian monsoon is critical for understanding the millennial-scale interactions between the Asian monsoon and the westerly winds. Abrupt climate events are a...
Data
Full-text available
Ecosystem response to climate change in high-altitude regions is a focus on global change research. Picea/Abies forests are widely distributed at high altitudes of East and Central Asia, and their distribution changes are sensitive to climate change. Humidity is an important climatic factor that affects high-altitude ecosystems; however, the relati...
Article
Full-text available
Carbonate deposition is a main inorganic carbon sink in lakes, which varies depending on climate change and internal lake dynamics. Research on the relationship between lake carbonate and climate will help to understand mechanisms of carbon cycle in lacustrine systems. The approach of this study is to explicitly link carbonate formation with Holoce...
Data
Full-text available
Modern climate research has shown that the Asian summer monsoon water vapor transport is limited to the eastern part of the Qilian Mountains. On the Holocene millennial-scale, whether the northwest boundary of the summer monsoon varies according to climate change is a key scientific issue. Yanchi Lake is located in the northern Qilian Mountains and...
Article
The pattern of Holocene environmental changes in the Asian monsoon margin on a millennial timescale remains controversial. Based on lithological characteristics and sedimentological proxies, we reconstructed Holocene-effective humidity changes and the lake evolution of Huahai Lake in the marginal area of the Asian monsoon in the Hexi Corridor of NW...