Zicheng Yu
Datos Biográficos
| ID | 4130320 |
|---|---|
| NOMBRE | Zicheng Yu |
| NOMBRES | Zicheng |
| APELLIDO | Yu |
| FIRMA | YU Z |
| AFILIACIONES | Lehigh University |
| ORCID | 0000-0003-2358-2712 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 31 |
| TOTAL DE CITAS | 65 |
| TOTAL COMO AUTOR | 31 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1994 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 4 |
Temporal changes in carbon and oxygen isotopic composition of peatland Sphagnum mosses and implications for paleoenvironmental reconstructions
Major moisture shifts in inland Northeast Asia during the last millennium
Previous paleoenvironmental data synthesis indicates that arid central Asia (‘westerlies Asia’) and mid-latitude East Asia (‘monsoonal Asia’) show anti-phased moisture variations over the last millennium. However, there are very few records from inland Northeast Asia, which obscures the spatial extent of or the boundary between the two domains and hinders the assessment of climate change impacts and consequences across the region. Here, we presen…
The mask paradox between perception of discomfort and reality of physiological effects in healthy college students in China
KN 95 respirators and cloth masks were found to cause the most discomfort during light physical activity, with males reporting higher discomfort levels than females. While these masks are associated with varying levels of perceived discomfort, their impact on physiological indicators is relatively modest. Future research should include larger and more diverse samples , continuous monitoring of physiological parameters during exercise, and explora…
Late Holocene vegetation and climate changes in the Great Hinggan Mountains, northeast China
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps
Soils and other unconsolidated deposits in the northern circumpolar permafrost region store large amounts of soil organic carbon (SOC). This SOC is potentially vulnerable to remobilization following soil warming and permafrost thaw, but SOC stock estimates were poorly constrained and quantitative error estimates were lacking. This study presents revised estimates of permafrost SOC stocks, including quantitative uncertainty estimates, in the 0–3 m…
Continental fens in western Canada as effective carbon sinks during the Holocene
Here, we present results of Holocene carbon accumulation from seven new peat cores at four fen sites from Alberta, western Canada. Along with two other published fen records in the same region, we provide a regional synthesis of carbon accumulation patterns, as well as peat property data in this continental climate. On the basis of >3000 peat sample measurements at 1-cm intervals, organic matter content in peat samples is on average at 91.0% (±9.…
Holocene peatland carbon dynamics in the circum-Arctic region
Peatlands represent the largest and most concentrated carbon pool in the terrestrial biosphere, and their dynamics during the Holocene have had significant impacts on the global carbon cycle. In this Introduction paper, we provide an overview of the contributions presented in this Special Issue on Holocene peatland carbon dynamics. We also provide a brief history and current status of peat-core-based research on peatland carbon dynamics. Finally,…
A database and synthesis of northern peatland soil properties and Holocene carbon and nitrogen accumulation
Here, we present results from the most comprehensive compilation of Holocene peat soil properties with associated carbon and nitrogen accumulation rates for northern peatlands. Our database consists of 268 peat cores from 215 sites located north of 45°N. It encompasses regions within which peat carbon data have only recently become available, such as the West Siberia Lowlands, the Hudson Bay Lowlands, Kamchatka in Far East Russia, and the Tibetan…
Holocene peatland initiation, lateral expansion, and carbon dynamics in the Zoige Basin of the eastern Tibetan Plateau
The Zoige Basin on the eastern Tibetan Plateau has the largest area of highland peatlands in China. However, the development history of these peatlands is still poorly understood. Understanding how these carbon-rich ecosystems responded to change in the Asian summer monsoons during the Holocene will provide insight into the peatland carbon accumulation processes under different climate boundary conditions. Here, we document the timing of initiati…
Holocene temperature fluctuations in the northern Tibetan Plateau
Arid Central Asia (ACA) lies on a major climatic boundary between the mid-latitude westerlies and the northwestern limit of the Asian summer monsoon, yet only a few high-quality reconstructions exist for its climate history. Here we calibrate a new organic geochemical proxy for lake temperature, and present a 45-yr-resolution temperature record from Hurleg Lake at the eastern margin of the ACA in the northern Tibetan Plateau. Combination with oth…
Holocene Carbon Dynamics of Global Peatlands
Multidisciplinary studies in environmental archaeology with particular reference to China
An important focus in research over the past decade is the relationship between climatic/environmental change and human cultural evolution during the Holocene. This decade saw an increasing number of natural scientists involved in this research, which led to debates and collaborations between natural scientists and archaeologists/anthropologists. This decade also witnessed an increase in multidisciplinary research across these subjects, which has…
Response of a warm temperate peatland to Holocene climate change in northeastern Pennsylvania
Studying boreal-type peatlands near the edge of their southern limit can provide insight into responses of boreal and sub-arctic peatlands to warmer climates. In this study, we investigated peatland history using multi-proxy records of sediment composition, plant macrofossil, pollen, and diatom analysis from a 14 C-dated sediment core at Tannersville Bog in northeastern Pennsylvania, USA. Our results indicate that peat accumulation began with lak…
Holocene carbon flux histories of the world’s peatlands
This paper proposes a novel approach using basal peat ages and carbon (C) accumulation profiles from the world’s major peatland regions to decompose C flux terms from time-dependent C pool data observed from peat cores. Our peat-data syntheses show that the total peat C pools are 547 GtC, 50 GtC, and 15 GtC for northern, tropical and southern peatlands, respectively. The modeled net C balance (NCB) has a mean value of 41.8 TgC/yr for northern pea…
Late Holocene Vegetation and Climate Oscillations in the Qaidam Basin of the Northeastern Tibetan Plateau
Pollen evidence from sediment cores at Hurleg and Toson lakes in the Qaidam Basin was obtained to examine vegetation and climatic change in the northeastern Qinghai-Tibetan Plateau. The chronologies were controlled by 210 Pb and 137 Cs analysis and AMS 14 C dating. Pollen assemblages from both lakes are dominated by Chenopodiaceae (∼ 40%), Artemisia (∼ 30–35%) and Poaceae (∼ 20–25%), with continued occurrence but low abundance of Nitraria , Ephed…
Global peatland dynamics since the Last Glacial Maximum
Here we present a new data synthesis of global peatland ages, area changes, and carbon (C) pool changes since the Last Glacial Maximum, along with a new peatland map and total C pool estimates. The data show different controls of peatland expansion and C accumulation in different regions. We estimate that northern peatlands have accumulated 547 (473–621) GtC, showing maximum accumulation in the early Holocene in response to high summer insolation…
Hemlock (Tsuga canadensis) declines at 9800 and 5300 cal. yr BP caused by Holocene climatic shifts in northeastern North America
We present fossil pollen data from a sediment core at Lake Grinnell in northern New Jersey of the northeastern United States. The 12 500-yr chronology of the sediment record was controlled by seven calibrated AMS radiocarbon dates on terrestrial plant macrofossils. Similar to many pollen profiles in the region, our data show that vegetation changed from Picea- and Pinus-dominated woodland/forest at 12.5—11.4 ka (1 ka = 1000 cal. yr BP), through P…
Vegetation response to Holocene climate change in monsoon-influenced region of China
Holocene climate variability in arid Asia
Spatial and temporal patterns of Holocene vegetation and climate changes in arid and semi-arid China
Synchronisation of palaeoenvironmental events in the North Atlantic region during the Last Termination
Holocene moisture evolution in arid central Asia and its out-of-phase relationship with Asian monsoon history
Withdrawn
Rapid response of forested vegetation to multiple climatic oscillations during the last deglaciation in the northeastern United States
Isotopic and pollen results from a marl lake (White Lake) in the Mid-Atlantic region of USA indicate the coupling of climate and vegetation changes. Oxygen isotopes of calcite from this site show multiple oscillations at millennial and centennial scales, including the Younger Dryas with 3‰ negative shifts in δ 18 O at 12.4–11.4 ka (1 ka = 1000 cal yr BP) and three cold events of magnitude 1–2‰ shifts during the Bølling–Allerød warm period (BOA) a…
Sensitive moisture response to Holocene millennial-scale climate variations in the Mid-Atlantic region, USA
Millennial-scale climate variability has been increasingly recognized as one of the most prominent features of the Holocene. However, regional responses, especially in terms of moisture conditions, are poorly documented and understood. Here we present lithologic and magnetic evidence from White Lake in northern New Jersey, USA, to show that low lake levels occurred at about 1.3, 3.0, 4.4 and 6.1 ka (1 ka = 1000 cal. yr BP). The low lake levels ar…
A database and synthesis of northern peatland soil properties and Holocene carbon and nitrogen accumulation
Here, we present results from the most comprehensive compilation of Holocene peat soil properties with associated carbon and nitrogen accumulation rates for northern peatlands. Our database consists of 268 peat cores from 215 sites located north of 45°N. It encompasses regions within which peat carbon data have only recently become available, such as the West Siberia Lowlands, the Hudson Bay Lowlands, Kamchatka in Far East Russia, and the Tibetan…
Holocene carbon flux histories of the world’s peatlands
This paper proposes a novel approach using basal peat ages and carbon (C) accumulation profiles from the world’s major peatland regions to decompose C flux terms from time-dependent C pool data observed from peat cores. Our peat-data syntheses show that the total peat C pools are 547 GtC, 50 GtC, and 15 GtC for northern, tropical and southern peatlands, respectively. The modeled net C balance (NCB) has a mean value of 41.8 TgC/yr for northern pea…
Carbon sequestration in western Canadian peat highly sensitive to Holocene wet-dry climate cycles at millennial timescales
A high-resolution fen peat record and 79 basal peat dates from paludified peatlands in continental western Canada provide evidence for cyclic change in moisture conditions and in peat carbon accumulation. The ash-free bulk density, a proxy for degree of peat decomposition and thus moisture conditions, shows periodicities at both millennial (from 1500 to 2190 yr, with a mean of 1785 yr) and century scales (386 yr and 667 yr). Wet periods of 200–60…
Holocene water levels at Rice Lake, Ontario, Canada
Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this floo…
Holocene peatland initiation, lateral expansion, and carbon dynamics in the Zoige Basin of the eastern Tibetan Plateau
The Zoige Basin on the eastern Tibetan Plateau has the largest area of highland peatlands in China. However, the development history of these peatlands is still poorly understood. Understanding how these carbon-rich ecosystems responded to change in the Asian summer monsoons during the Holocene will provide insight into the peatland carbon accumulation processes under different climate boundary conditions. Here, we document the timing of initiati…
Sensitive moisture response to Holocene millennial-scale climate variations in the Mid-Atlantic region, USA
Millennial-scale climate variability has been increasingly recognized as one of the most prominent features of the Holocene. However, regional responses, especially in terms of moisture conditions, are poorly documented and understood. Here we present lithologic and magnetic evidence from White Lake in northern New Jersey, USA, to show that low lake levels occurred at about 1.3, 3.0, 4.4 and 6.1 ka (1 ka = 1000 cal. yr BP). The low lake levels ar…
Late Holocene Natural and Human-Induced Environmental Change Reconstructed from Peat Records in Eastern Central China
We present a high-resolution multiproxy record (geochemistry, macrofossil, and pollen) from a peatland in the Dajiuhu Basin in eastern central China. The chronology of the 120-cm peat profile was controlled by 6 accelerator mass spectrometry (AMS) 14 C dates on plant remains, including 2 post-bomb dates. The age model was based on linear interpolations of calibrated ages. Plant macrofossil results indicate a major transition around 3600 cal BP fr…
A 2100-year trace-element and stable-isotope record at decadal resolution from Rice Lake in the Northern Great Plains, USA
A 2100-year multiple proxy record at decadal resolution from a topographically closed (but hydrolog ically open) lake basin was used to reconstruct changes in lake salinity and evaporative intensity and to evaluate the reliability of different proxies for inferring climatic change in the glaciated Northern Great Plains (NGP). At Rice Lake, North Dakota, the ostracode-Mg/Ca ratios show good correlation with other ostracode, diatom and aeolian prox…
Holocene water levels at Rice Lake, Ontario, Canada
Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this floo…
Hydrologic Variation in the Northern Great Plains During the Last Two Millennia
Reconstructions of lake-water salinity at decadal resolution for the last 2000 yr are compared among three lakes in North Dakota to infer regional patterns of drought. The intersite comparisons are used to distinguish local variation in climate or hydrology from regional patterns of change. At one lake, diatom-inferred salinity and lake-water Mg/Ca inferred from ostracode shell chemistry are coherent, both in terms of direction and magnitude of c…
Millennial-Scale Rhythms in Peatlands in the Western Interior of Canada and in the Global Carbon Cycle
A natural ∼1450-yr global Holocene climate periodicity underlies a portion of the present global warming trend. Calibrated basal radiocarbon dates from 71 paludified peatlands across the western interior of Canada demonstrate that this periodicity regulated western Canadian peatland initiation. Peatlands, the largest terrestrial carbon pool, and their carbon-budgets are sensitive to hydrological fluctuations. The global atmospheric carbon-budget …
A 2100-year trace-element and stable-isotope record at decadal resolution from Rice Lake in the Northern Great Plains, USA
A 2100-year multiple proxy record at decadal resolution from a topographically closed (but hydrolog ically open) lake basin was used to reconstruct changes in lake salinity and evaporative intensity and to evaluate the reliability of different proxies for inferring climatic change in the glaciated Northern Great Plains (NGP). At Rice Lake, North Dakota, the ostracode-Mg/Ca ratios show good correlation with other ostracode, diatom and aeolian prox…
Carbon sequestration in western Canadian peat highly sensitive to Holocene wet-dry climate cycles at millennial timescales
A high-resolution fen peat record and 79 basal peat dates from paludified peatlands in continental western Canada provide evidence for cyclic change in moisture conditions and in peat carbon accumulation. The ash-free bulk density, a proxy for degree of peat decomposition and thus moisture conditions, shows periodicities at both millennial (from 1500 to 2190 yr, with a mean of 1785 yr) and century scales (386 yr and 667 yr). Wet periods of 200–60…
Rapid response of forested vegetation to multiple climatic oscillations during the last deglaciation in the northeastern United States
Isotopic and pollen results from a marl lake (White Lake) in the Mid-Atlantic region of USA indicate the coupling of climate and vegetation changes. Oxygen isotopes of calcite from this site show multiple oscillations at millennial and centennial scales, including the Younger Dryas with 3‰ negative shifts in δ 18 O at 12.4–11.4 ka (1 ka = 1000 cal yr BP) and three cold events of magnitude 1–2‰ shifts during the Bølling–Allerød warm period (BOA) a…
Sensitive moisture response to Holocene millennial-scale climate variations in the Mid-Atlantic region, USA
Millennial-scale climate variability has been increasingly recognized as one of the most prominent features of the Holocene. However, regional responses, especially in terms of moisture conditions, are poorly documented and understood. Here we present lithologic and magnetic evidence from White Lake in northern New Jersey, USA, to show that low lake levels occurred at about 1.3, 3.0, 4.4 and 6.1 ka (1 ka = 1000 cal. yr BP). The low lake levels ar…
Late Holocene Natural and Human-Induced Environmental Change Reconstructed from Peat Records in Eastern Central China
We present a high-resolution multiproxy record (geochemistry, macrofossil, and pollen) from a peatland in the Dajiuhu Basin in eastern central China. The chronology of the 120-cm peat profile was controlled by 6 accelerator mass spectrometry (AMS) 14 C dates on plant remains, including 2 post-bomb dates. The age model was based on linear interpolations of calibrated ages. Plant macrofossil results indicate a major transition around 3600 cal BP fr…
Synchronisation of palaeoenvironmental events in the North Atlantic region during the Last Termination
Holocene moisture evolution in arid central Asia and its out-of-phase relationship with Asian monsoon history
Withdrawn
Vegetation response to Holocene climate change in monsoon-influenced region of China
Holocene climate variability in arid Asia
Spatial and temporal patterns of Holocene vegetation and climate changes in arid and semi-arid China
Late Holocene Vegetation and Climate Oscillations in the Qaidam Basin of the Northeastern Tibetan Plateau
Pollen evidence from sediment cores at Hurleg and Toson lakes in the Qaidam Basin was obtained to examine vegetation and climatic change in the northeastern Qinghai-Tibetan Plateau. The chronologies were controlled by 210 Pb and 137 Cs analysis and AMS 14 C dating. Pollen assemblages from both lakes are dominated by Chenopodiaceae (∼ 40%), Artemisia (∼ 30–35%) and Poaceae (∼ 20–25%), with continued occurrence but low abundance of Nitraria , Ephed…
Global peatland dynamics since the Last Glacial Maximum
Here we present a new data synthesis of global peatland ages, area changes, and carbon (C) pool changes since the Last Glacial Maximum, along with a new peatland map and total C pool estimates. The data show different controls of peatland expansion and C accumulation in different regions. We estimate that northern peatlands have accumulated 547 (473–621) GtC, showing maximum accumulation in the early Holocene in response to high summer insolation…
Hemlock (Tsuga canadensis) declines at 9800 and 5300 cal. yr BP caused by Holocene climatic shifts in northeastern North America
We present fossil pollen data from a sediment core at Lake Grinnell in northern New Jersey of the northeastern United States. The 12 500-yr chronology of the sediment record was controlled by seven calibrated AMS radiocarbon dates on terrestrial plant macrofossils. Similar to many pollen profiles in the region, our data show that vegetation changed from Picea- and Pinus-dominated woodland/forest at 12.5—11.4 ka (1 ka = 1000 cal. yr BP), through P…
Response of a warm temperate peatland to Holocene climate change in northeastern Pennsylvania
Studying boreal-type peatlands near the edge of their southern limit can provide insight into responses of boreal and sub-arctic peatlands to warmer climates. In this study, we investigated peatland history using multi-proxy records of sediment composition, plant macrofossil, pollen, and diatom analysis from a 14 C-dated sediment core at Tannersville Bog in northeastern Pennsylvania, USA. Our results indicate that peat accumulation began with lak…
Holocene carbon flux histories of the world’s peatlands
This paper proposes a novel approach using basal peat ages and carbon (C) accumulation profiles from the world’s major peatland regions to decompose C flux terms from time-dependent C pool data observed from peat cores. Our peat-data syntheses show that the total peat C pools are 547 GtC, 50 GtC, and 15 GtC for northern, tropical and southern peatlands, respectively. The modeled net C balance (NCB) has a mean value of 41.8 TgC/yr for northern pea…
Holocene Carbon Dynamics of Global Peatlands
Multidisciplinary studies in environmental archaeology with particular reference to China
An important focus in research over the past decade is the relationship between climatic/environmental change and human cultural evolution during the Holocene. This decade saw an increasing number of natural scientists involved in this research, which led to debates and collaborations between natural scientists and archaeologists/anthropologists. This decade also witnessed an increase in multidisciplinary research across these subjects, which has…
Holocene temperature fluctuations in the northern Tibetan Plateau
Arid Central Asia (ACA) lies on a major climatic boundary between the mid-latitude westerlies and the northwestern limit of the Asian summer monsoon, yet only a few high-quality reconstructions exist for its climate history. Here we calibrate a new organic geochemical proxy for lake temperature, and present a 45-yr-resolution temperature record from Hurleg Lake at the eastern margin of the ACA in the northern Tibetan Plateau. Combination with oth…
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps
Soils and other unconsolidated deposits in the northern circumpolar permafrost region store large amounts of soil organic carbon (SOC). This SOC is potentially vulnerable to remobilization following soil warming and permafrost thaw, but SOC stock estimates were poorly constrained and quantitative error estimates were lacking. This study presents revised estimates of permafrost SOC stocks, including quantitative uncertainty estimates, in the 0–3 m…
Continental fens in western Canada as effective carbon sinks during the Holocene
Here, we present results of Holocene carbon accumulation from seven new peat cores at four fen sites from Alberta, western Canada. Along with two other published fen records in the same region, we provide a regional synthesis of carbon accumulation patterns, as well as peat property data in this continental climate. On the basis of >3000 peat sample measurements at 1-cm intervals, organic matter content in peat samples is on average at 91.0% (±9.…
Holocene peatland carbon dynamics in the circum-Arctic region
Peatlands represent the largest and most concentrated carbon pool in the terrestrial biosphere, and their dynamics during the Holocene have had significant impacts on the global carbon cycle. In this Introduction paper, we provide an overview of the contributions presented in this Special Issue on Holocene peatland carbon dynamics. We also provide a brief history and current status of peat-core-based research on peatland carbon dynamics. Finally,…
Geography (29 obras) · Geology and Paleoclimatology Research (28 obras) · Physical geography (26 obras) · Holocene (25 obras) · Climate change (19 obras) · Climatology (17 obras) · Geology (17 obras) · Oceanography (16 obras) · Environmental Science (14 obras) · Coastal wetland ecosystem dynamics (13 obras)