Qianlai Zhuang
Datos Biográficos
| ID | 6276419 |
|---|---|
| NOMBRE | Qianlai Zhuang |
| NOMBRES | Qianlai |
| APELLIDO | Zhuang |
| FIRMA | ZHUANG Q |
| AFILIACIONES | Purdue University West Lafayette |
| ORCID | 0000-0002-4536-9851 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 25 |
| TOTAL DE CITAS | 3 |
| TOTAL COMO AUTOR | 25 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2007 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2025 |
| ÍNDICE H | 1 |
Improving the quantification of global free-living and symbiotic nitrogen fixation in natural terrestrial ecosystems
Biological nitrogen fixation (BNF) is a critical natural nitrogen input that sustains terrestrial carbon cycling, yet it remains poorly represented in terrestrial ecosystem models (TEMs). Here, we refine the nitrogen cycle representation in a TEM by incorporating free-living and symbiotic nitrogen fixation (SNF) processes along with atmospheric nitrogen deposition effects. Our updated model provides a new assessment of present-day and future glob…
Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes
Both lateral surface and subsurface water flow affect soil moisture dynamics, yet most land surface models only solve subsurface water movement vertically. Here, we use a 3D ecosystem model that considers both land surface and subsurface hydrologic processes to simulate soil moisture, which is then used to drive a 1-D vertical soil thermal model to simulate the soil moisture effects on soil thermal dynamics in central Alaska. Our coupled model im…
Assessment of global land cover changes using satellite data
Global land cover has changed during the past decades, influencing biogeochemical cycles and the global climate system. This study aimed to improve understanding of global land cover dynamics to enable more effective future land management practices and conservation actions. This study quantified interannual changes in global land cover types from 2001 to 2020 and distinguished intermittent transitions from stable gains and losses. From the inter…
Impacts of wildfires on boreal forest ecosystem carbon dynamics from 1986 to 2020
Wildfires significantly change boreal forest ecosystem carbon balance through both direct combustion and post-fire carbon dynamics. Affected vegetation influences soil thermal regime and carbon cycling by impacting the surface energy balance of boreal forests. This study uses a process-based biogeochemistry model to quantify carbon budget of North American boreal forests during 1986–2020 based on satellite-derived burn severity data. During the s…
Critical needs to close monitoring gaps in pan-tropical wetland CH 4 emissions
Global wetlands are the largest and most uncertain natural source of atmospheric methane (CH 4 ). The FLUXNET-CH 4 synthesis initiative has established a global network of flux tower infrastructure, offering valuable data products and fostering a dedicated community for the measurement and analysis of methane flux data. Existing studies using the FLUXNET-CH 4 Community Product v1.0 have provided invaluable insights into the drivers of ecosystem-t…
The importance of interactions between snow, permafrost and vegetation dynamics in affecting terrestrial carbon balance in circumpolar regions
Permafrost dynamics can drastically affect vegetation and soil carbon dynamics in northern high latitudes. Vegetation has significant influences on the energy balance of soil surface by impacting the short-wave radiation, long-wave radiation and surface sensible heat flux, affecting soil thermal dynamics, in turn, inducing vegetation shift, affecting carbon cycling. During winter, snow can also significantly impact soil temperature due to its ins…
Predicting soil organic carbon stocks under future land use and climate change conditions in Northeast China
The Global Methane Budget 2000–2017
Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Atmospheric emissions and concentrations of CH4 continue to increase, making CH4 the second most important human-influenced greenhouse gas in terms of climate forcing, after carbon dioxide (CO2). The relative importance of CH4 compared to CO2 depends on its shorter atmospheric lifetime, stronger warming potential…
Rising methane emissions from boreal lakes due to increasing ice-free days
Lakes account for about 10% of the boreal landscape and are responsible for approximately 30% of biogenic methane emissions that have been found to increase under changing climate. However, the quantification of this climate-sensitive methane source is fraught with large uncertainty under warming climate conditions. Only a few studies have addressed the mechanism of climate impact on the increase of northern lake methane emissions. This study use…
Permafrost sensitivity to global warming of 1.5 °C and 2 °C in the Northern Hemisphere
Permafrost degradation induced by climate warming is widely observed in the Northern Hemisphere. However, changes in permafrost sensitivity to climate warming (PSCW) in the future remains unclear. This study examined the changes in permafrost distribution in the Northern Hemisphere under global warming of 1.5 °C and 2 °C, and then characterized the spatial and temporal characteristics of PSCW. Global warming of 1.5 °C and 2 °C would result in 17.…
Spatio-temporal dynamics of evapotranspiration on the Tibetan Plateau from 2000 to 2010
Evapotranspiration (ET) is a key process of the climate system because it links water, energy and carbon cycles. In this study we modified a Penman–Monteith based algorithm to estimate ET on the Tibetan Plateau at a 1 km spatial resolution for the period 2000–2010 using meteorological and satellite remote sensing data. The results showed that the average annual ET on the Tibetan Plateau was 350.3 mm year–1 and decreased from the southeast toward …
Focus on the impact of climate change on wetland ecosystems and carbon dynamics
The renewed growth in atmospheric methane (CH4) since 2007 after a decade of stabilization has drawn much attention to its causes and future trends. Wetlands are the single largest source of atmospheric CH4. Understanding wetland ecosystems and carbon dynamics is critical to the estimation of global CH4 and carbon budgets. After approximately 7 years of CH4 related research following the renewed growth in atmospheric CH4, Environmental Research L…
Influence of changes in wetland inundation extent on net fluxes of carbon dioxide and methane in northern high latitudes from 1993 to 2004
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 10 (2015): 095009, doi:10.1088/1748-9326/10/9/095009
Arctic lakes are continuous methane sources to the atmosphere under warming conditions
Methane is the second most powerful carbon-based greenhouse gas in the atmosphere and its production in the natural environment through methanogenesis is positively correlated with temperature. Recent field studies showed that methane emissions from Arctic thermokarst lakes are significant and could increase by two- to four-fold due to global warming. But the estimates of this source are still poorly constrained. By using a process-based climate-…
Net exchanges of methane and carbon dioxide on the Qinghai-Tibetan Plateau from 1979 to 2100
Methane (CH _4 ) is a potent greenhouse gas (GHG) that affects the global climate system. Knowledge about land–atmospheric CH _4 exchanges on the Qinghai-Tibetan Plateau (QTP) is insufficient. Using a coupled biogeochemistry model, this study analyzes the net exchanges of CH _4 and CO _2 over the QTP for the period of 1979–2100. Our simulations show that the region currently acts as a net CH _4 source with 0.95 Tg CH _4 y ^−1 emissions and 0.19 T…
Potential influence of climate-induced vegetation shifts on future land use and associated land carbon fluxes in Northern Eurasia
© The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 9 (2014): 035004, doi:10.1088/1748-9326/9/3/035004
The impacts of recent permafrost thaw on land–atmosphere greenhouse gas exchange
Permafrost thaw and the subsequent mobilization of carbon (C) stored in previously frozen soil organic matter (SOM) have the potential to be a strong positive feedback to climate. As the northern permafrost region experiences as much as a doubling of the rate of warming as the rest of the Earth, the vast amount of C in permafrost soils is vulnerable to thaw, decomposition and release as atmospheric greenhouse gases. Diagnostic and predictive esti…
Permafrost degradation and methane
© The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 8 (2013): 035014, doi:10.1088/1748-9326/8/3/035014
Biofuel, land and water
The productive cellulosic crops switchgrass and Miscanthus are considered as viable biofuel sources. To meet the 2022 national biofuel target mandate, actions must be taken, e.g., maize cultivation must be intensified and expanded, and other biofuel crops (switchgrass and Miscanthus ) must be cultivated. This raises questions on the use efficiencies of land and water; to date, the demand on these resources to meet the national biofuel target has …
Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes
The diversity of ecosystems across boreal landscapes, successional changes after disturbance and complicated permafrost histories, present enormous challenges for assessing how vegetation, water and soil carbon may respond to climate change in boreal regions. To address this complexity, we used a chronosequence approach to assess changes in vegetation composition, water storage and soil organic carbon (SOC) stocks along successional gradients wit…
Pan-Arctic land–atmospheric fluxes of methane and carbon dioxide in response to climate change over the 21st century
Future changes of pan-Arctic land–atmospheric methane (CH _4 ) and carbon dioxide (CO _2 ) depend on how terrestrial ecosystems respond to warming climate. Here, we used a coupled hydrology–biogeochemistry model to make our estimates of these carbon exchanges with two contrasting climate change scenarios (no-policy versus policy) over the 21st century, by considering (1) a detailed water table dynamics and (2) a permafrost-thawing effect. Our sim…
Areal changes of land ecosystems in the Alaskan Yukon River Basin from 1984 to 2008
Multivariate alteration detection (MAD) and Bayesian inference (BI) methods are used to analyze land cover changes with Landsat images for the Alaskan Yukon River Basin from 1984 to 2008. The US Geological Survey National Land Cover Database 2001 (NLCD 2001) is treated as reference information to detect the changes. It is found that the regional land cover change has three general trends with various potential causes during the study period: (1) …
Rising methane emissions in response to climate change in Northern Eurasia during the 21st century
We used a biogeochemistry model, the Terrestrial Ecosystem Model (TEM), to examine the methane (CH4) exchanges between terrestrial ecosystems and the atmosphere in Northern Eurasia from 1971 to 2100. Multiple model simulations using various wetland extent datasets and climate change scenarios were conducted to assess the uncertainty of CH4 fluxes, including emissions and consumption. On the basis of these simulations we estimate the current net e…
Possible decline of the carbon sink in the Mongolian Plateau during the 21st century
The Mongolian Plateau is dominated by grassland ecosystems. It frequently experiences drought and is underlain by permafrost in the north. Its complex responses of plant carbon uptake and soil carbon release to climate change are considered to have affected the global carbon cycle during the 21st century. Here we combine spatially explicit information on vegetation, soils, topography and climate with a process-based biogeochemistry model to asses…
Drought effects on large fire activity in Canadian and Alaskan forests
Fire is the dominant disturbance in forest ecosystems across Canada and Alaska, and has important implications for forest ecosystems, terrestrial carbon dioxide emissions and the forestry industry. Large fire activity had increased in Canadian and Alaskan forests during the last four decades of the 20th century. Here we combined the Palmer Drought Severity Index and historical large fire databases to demonstrate that Canada and Alaska forest regi…
Drought effects on large fire activity in Canadian and Alaskan forests
Fire is the dominant disturbance in forest ecosystems across Canada and Alaska, and has important implications for forest ecosystems, terrestrial carbon dioxide emissions and the forestry industry. Large fire activity had increased in Canadian and Alaskan forests during the last four decades of the 20th century. Here we combined the Palmer Drought Severity Index and historical large fire databases to demonstrate that Canada and Alaska forest regi…
Possible decline of the carbon sink in the Mongolian Plateau during the 21st century
The Mongolian Plateau is dominated by grassland ecosystems. It frequently experiences drought and is underlain by permafrost in the north. Its complex responses of plant carbon uptake and soil carbon release to climate change are considered to have affected the global carbon cycle during the 21st century. Here we combine spatially explicit information on vegetation, soils, topography and climate with a process-based biogeochemistry model to asses…
Areal changes of land ecosystems in the Alaskan Yukon River Basin from 1984 to 2008
Multivariate alteration detection (MAD) and Bayesian inference (BI) methods are used to analyze land cover changes with Landsat images for the Alaskan Yukon River Basin from 1984 to 2008. The US Geological Survey National Land Cover Database 2001 (NLCD 2001) is treated as reference information to detect the changes. It is found that the regional land cover change has three general trends with various potential causes during the study period: (1) …
Rising methane emissions in response to climate change in Northern Eurasia during the 21st century
We used a biogeochemistry model, the Terrestrial Ecosystem Model (TEM), to examine the methane (CH4) exchanges between terrestrial ecosystems and the atmosphere in Northern Eurasia from 1971 to 2100. Multiple model simulations using various wetland extent datasets and climate change scenarios were conducted to assess the uncertainty of CH4 fluxes, including emissions and consumption. On the basis of these simulations we estimate the current net e…
Permafrost degradation and methane
© The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 8 (2013): 035014, doi:10.1088/1748-9326/8/3/035014
Biofuel, land and water
The productive cellulosic crops switchgrass and Miscanthus are considered as viable biofuel sources. To meet the 2022 national biofuel target mandate, actions must be taken, e.g., maize cultivation must be intensified and expanded, and other biofuel crops (switchgrass and Miscanthus ) must be cultivated. This raises questions on the use efficiencies of land and water; to date, the demand on these resources to meet the national biofuel target has …
Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes
The diversity of ecosystems across boreal landscapes, successional changes after disturbance and complicated permafrost histories, present enormous challenges for assessing how vegetation, water and soil carbon may respond to climate change in boreal regions. To address this complexity, we used a chronosequence approach to assess changes in vegetation composition, water storage and soil organic carbon (SOC) stocks along successional gradients wit…
Pan-Arctic land–atmospheric fluxes of methane and carbon dioxide in response to climate change over the 21st century
Future changes of pan-Arctic land–atmospheric methane (CH _4 ) and carbon dioxide (CO _2 ) depend on how terrestrial ecosystems respond to warming climate. Here, we used a coupled hydrology–biogeochemistry model to make our estimates of these carbon exchanges with two contrasting climate change scenarios (no-policy versus policy) over the 21st century, by considering (1) a detailed water table dynamics and (2) a permafrost-thawing effect. Our sim…
Potential influence of climate-induced vegetation shifts on future land use and associated land carbon fluxes in Northern Eurasia
© The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 9 (2014): 035004, doi:10.1088/1748-9326/9/3/035004
The impacts of recent permafrost thaw on land–atmosphere greenhouse gas exchange
Permafrost thaw and the subsequent mobilization of carbon (C) stored in previously frozen soil organic matter (SOM) have the potential to be a strong positive feedback to climate. As the northern permafrost region experiences as much as a doubling of the rate of warming as the rest of the Earth, the vast amount of C in permafrost soils is vulnerable to thaw, decomposition and release as atmospheric greenhouse gases. Diagnostic and predictive esti…
Influence of changes in wetland inundation extent on net fluxes of carbon dioxide and methane in northern high latitudes from 1993 to 2004
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Environmental Research Letters 10 (2015): 095009, doi:10.1088/1748-9326/10/9/095009
Arctic lakes are continuous methane sources to the atmosphere under warming conditions
Methane is the second most powerful carbon-based greenhouse gas in the atmosphere and its production in the natural environment through methanogenesis is positively correlated with temperature. Recent field studies showed that methane emissions from Arctic thermokarst lakes are significant and could increase by two- to four-fold due to global warming. But the estimates of this source are still poorly constrained. By using a process-based climate-…
Net exchanges of methane and carbon dioxide on the Qinghai-Tibetan Plateau from 1979 to 2100
Methane (CH _4 ) is a potent greenhouse gas (GHG) that affects the global climate system. Knowledge about land–atmospheric CH _4 exchanges on the Qinghai-Tibetan Plateau (QTP) is insufficient. Using a coupled biogeochemistry model, this study analyzes the net exchanges of CH _4 and CO _2 over the QTP for the period of 1979–2100. Our simulations show that the region currently acts as a net CH _4 source with 0.95 Tg CH _4 y ^−1 emissions and 0.19 T…
Focus on the impact of climate change on wetland ecosystems and carbon dynamics
The renewed growth in atmospheric methane (CH4) since 2007 after a decade of stabilization has drawn much attention to its causes and future trends. Wetlands are the single largest source of atmospheric CH4. Understanding wetland ecosystems and carbon dynamics is critical to the estimation of global CH4 and carbon budgets. After approximately 7 years of CH4 related research following the renewed growth in atmospheric CH4, Environmental Research L…
Spatio-temporal dynamics of evapotranspiration on the Tibetan Plateau from 2000 to 2010
Evapotranspiration (ET) is a key process of the climate system because it links water, energy and carbon cycles. In this study we modified a Penman–Monteith based algorithm to estimate ET on the Tibetan Plateau at a 1 km spatial resolution for the period 2000–2010 using meteorological and satellite remote sensing data. The results showed that the average annual ET on the Tibetan Plateau was 350.3 mm year–1 and decreased from the southeast toward …
The Global Methane Budget 2000–2017
Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Atmospheric emissions and concentrations of CH4 continue to increase, making CH4 the second most important human-influenced greenhouse gas in terms of climate forcing, after carbon dioxide (CO2). The relative importance of CH4 compared to CO2 depends on its shorter atmospheric lifetime, stronger warming potential…
Rising methane emissions from boreal lakes due to increasing ice-free days
Lakes account for about 10% of the boreal landscape and are responsible for approximately 30% of biogenic methane emissions that have been found to increase under changing climate. However, the quantification of this climate-sensitive methane source is fraught with large uncertainty under warming climate conditions. Only a few studies have addressed the mechanism of climate impact on the increase of northern lake methane emissions. This study use…
Permafrost sensitivity to global warming of 1.5 °C and 2 °C in the Northern Hemisphere
Permafrost degradation induced by climate warming is widely observed in the Northern Hemisphere. However, changes in permafrost sensitivity to climate warming (PSCW) in the future remains unclear. This study examined the changes in permafrost distribution in the Northern Hemisphere under global warming of 1.5 °C and 2 °C, and then characterized the spatial and temporal characteristics of PSCW. Global warming of 1.5 °C and 2 °C would result in 17.…
The importance of interactions between snow, permafrost and vegetation dynamics in affecting terrestrial carbon balance in circumpolar regions
Permafrost dynamics can drastically affect vegetation and soil carbon dynamics in northern high latitudes. Vegetation has significant influences on the energy balance of soil surface by impacting the short-wave radiation, long-wave radiation and surface sensible heat flux, affecting soil thermal dynamics, in turn, inducing vegetation shift, affecting carbon cycling. During winter, snow can also significantly impact soil temperature due to its ins…
Predicting soil organic carbon stocks under future land use and climate change conditions in Northeast China
Impacts of wildfires on boreal forest ecosystem carbon dynamics from 1986 to 2020
Wildfires significantly change boreal forest ecosystem carbon balance through both direct combustion and post-fire carbon dynamics. Affected vegetation influences soil thermal regime and carbon cycling by impacting the surface energy balance of boreal forests. This study uses a process-based biogeochemistry model to quantify carbon budget of North American boreal forests during 1986–2020 based on satellite-derived burn severity data. During the s…
Critical needs to close monitoring gaps in pan-tropical wetland CH 4 emissions
Global wetlands are the largest and most uncertain natural source of atmospheric methane (CH 4 ). The FLUXNET-CH 4 synthesis initiative has established a global network of flux tower infrastructure, offering valuable data products and fostering a dedicated community for the measurement and analysis of methane flux data. Existing studies using the FLUXNET-CH 4 Community Product v1.0 have provided invaluable insights into the drivers of ecosystem-t…
Improving the quantification of global free-living and symbiotic nitrogen fixation in natural terrestrial ecosystems
Biological nitrogen fixation (BNF) is a critical natural nitrogen input that sustains terrestrial carbon cycling, yet it remains poorly represented in terrestrial ecosystem models (TEMs). Here, we refine the nitrogen cycle representation in a TEM by incorporating free-living and symbiotic nitrogen fixation (SNF) processes along with atmospheric nitrogen deposition effects. Our updated model provides a new assessment of present-day and future glob…
Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes
Both lateral surface and subsurface water flow affect soil moisture dynamics, yet most land surface models only solve subsurface water movement vertically. Here, we use a 3D ecosystem model that considers both land surface and subsurface hydrologic processes to simulate soil moisture, which is then used to drive a 1-D vertical soil thermal model to simulate the soil moisture effects on soil thermal dynamics in central Alaska. Our coupled model im…
Assessment of global land cover changes using satellite data
Global land cover has changed during the past decades, influencing biogeochemical cycles and the global climate system. This study aimed to improve understanding of global land cover dynamics to enable more effective future land management practices and conservation actions. This study quantified interannual changes in global land cover types from 2001 to 2020 and distinguished intermittent transitions from stable gains and losses. From the inter…
Environmental Science (24 obras) · Ecology (20 obras) · Geology (20 obras) · Climate change (16 obras) · Geography (16 obras) · Ecosystem (15 obras) · Climate change and permafrost (14 obras) · Atmospheric sciences (13 obras) · Climatology (13 obras) · Permafrost (10 obras)