
Cheng GongMax Planck Institute for Biogeochemistry | BGC
Cheng Gong
PhD
About
27
Publications
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Introduction
My current project is to examine the impacts of nitrogen limitations on terrestrial ecosystem, global C-N cycles and also climate changes by using the terrestrial ecosystem model QUINCY. I'm also interested in global biogeochemical cycles, air pollutions and atmosphere-biosphere interactions, especially the ozone pollution issues in China and ozone-vegetation interactions.
Publications
Publications (27)
Ozone–vegetation feedback is essential to tropospheric ozone (O3) concentrations. The O3 stomatal uptake damages leaf photosynthesis and stomatal conductance and, in turn, influences O3 dry deposition. Further, O3 directly influences isoprene emissions, an important precursor of O3. The effects of O3 on vegetation further alter local meteorological...
Plain Language Summary
The summertime ozone (O3) in eastern China has kept increasing in recent years, accompanying with more frequent persistent O3 pollution episodes (OPEs) in North China Plain and Yangtze River Delta (YRD). Vegetation‐related processes, including biogenic volatile organic compounds emissions and stomatal O3 uptakes, significantl...
Anthropogenic activities have substantially enhanced the loadings of reactive nitrogen (Nr) in the Earth system since pre-industrial times1,2, contributing to widespread eutrophication and air pollution3–6. Increased Nr can also influence global climate through a variety of effects on atmospheric and land processes but the cumulative net climate ef...
China's sustained air quality improvement is hindered by unregulated ammonia (NH3) emissions from inefficient nitrogen management in smallholder farming. Although the Chinese government is promoting a policy shift to large-scale farming, its benefits when integrated with nitrogen management remain unclear. Here we fill this gap using an integrated...
Nitrous oxide (N2O) is a greenhouse gas and stratospheric ozone‐depleting substance with large and growing anthropogenic emissions. Previous studies identified the influx of N2O‐depleted air from the stratosphere to partly cause the seasonality in tropospheric N2O (aN2O), but other contributions remain unclear. Here, we combine surface fluxes from...
Land ecosystems are important sources and sinks of atmospheric components. In turn, air pollutants affect the exchange rates of carbon and water fluxes between ecosystems and the atmosphere. However, these biogeochemical processes are usually not well presented in Earth system models, limiting the explorations of interactions between land ecosystem...
Nitrous oxide (N2O) is a greenhouse gas and an ozone-depleting agent with large and growing anthropogenic emissions. Previous studies identified the influx of N2O-depleted air from the stratosphere to partly cause the seasonality in tropospheric N2O (aN2O), but other contributions remain unclear. Here we combine surface fluxes from eight land and f...
Land ecosystems are important sources and sinks of atmospheric components. In turn, air pollutants affect the exchange rates of carbon and water fluxes between ecosystems and atmosphere. However, these biogeochemical processes are usually not well presented in the Earth system models, limiting the explorations of interactions between land ecosystem...
A major limitation in modeling global ozone (O3) vegetation damage has long been the reliance on empirical O3 sensitivity parameters derived from a limited number of species and applied at the level of plant functional types (PFTs), which ignore the large interspecific variations within the same PFT. Here, we present a major advance in large-scale...
The fast growing surface ozone (O3) pollution poses threats to the ecosystem health and carbon assimilation in China. Here, we apply a coupled atmospheric chemistry-vegetation model to explore the effective ways of mitigating O3-induced loss of gross primary productivity (GPP) in China through anthropogenic emission controls at different regions an...
A major limitation in modeling global ozone (O3) vegetation damage has long been the reliance on empirical O3 sensitivity parameters derived from a limited number of species and applied at the level of plant functional types (PFTs), which ignore the large interspecific variations within the same PFT. Here, we present a major advance in large-scale...
The warming climate increases the probability of hot days, which leads to a penalty effect of increasing ozone (O3)‐polluted days in polluted regions. Here, we established a random forest algorithm to predict future probabilities of O3 exceedance (P) during hot days and further examined the future co‐occurrences of O3‐polluted days and hot days und...
Accurate simulation of gross primary productivity (GPP) is essential for estimating the global carbon budget. However, GPP modeling is subject to various sources of uncertainties, among which the impacts of biases in climate forcing data have not been well quantified. Here, using a well-validated vegetation model, we compare site-level simulations...
Fire is an important source of ozone (O3) precursors. The formation of surface O3 can cause damage to vegetation and reduce stomatal conductance. Such processes can feed back to inhibit dry deposition and indirectly enhance surface O3. Here, we apply a fully coupled chemistry–vegetation model to estimate the indirect contributions of global fires t...
Surface ozone (O3) is detrimental to plant health. Traditional exposure indexes, such as accumulated hourly O3 concentrations over a threshold of 40 ppb (AOT40), are easy to be derived and widely used to assess O3 damage effects on vegetation. However, the regulation of environmental stresses on O3 stomatal uptake is ignored. In comparison, the dos...
Surface ozone is a major pollutant in eastern China, especially during the summer season. The formation of surface ozone pollution highly depends on meteorological conditions largely controlled by regional circulation patterns which can modulate ozone concentrations by influencing the emission of the precursors, the chemical production rates, and r...
Fire is an important source of surface ozone (O3), which causes damage to vegetation and reduces stomatal conductance. Such processes can feed back to inhibit dry deposition and indirectly enhance surface O3. Here, we apply a fully coupled chemistry-vegetation model to estimate the indirect contributions of global fires to surface O3 through O3-veg...
Surface ozone is a major pollutant in Eastern China, especially during the summer season. The formation of surface ozone pollution highly depends on meteorological conditions as generally controlled regional circulation patterns. Here we show that summertime ozone pollution over Eastern China is distinctly modulated by the variability of West Pacif...
Surface ozone is a major pollutant in eastern China, especially during the summer season. The formation of surface ozone pollution highly depends on meteorological conditions largely controlled by regional circulation patterns which can modulate ozone concentrations by influencing the emission of the precursors, the chemical production rates, and r...
The terrestrial biosphere and atmospheric chemistry interact through multiple feedbacks, but the models of vegetation and chemistry are developed separately. In this study, the Yale Interactive terrestrial Biosphere (YIBs) model, a dynamic vegetation model with biogeochemical processes, is implemented into the Chemical Transport Model GEOS-Chem (GC...
Abstract. Ozone-vegetation feedback is essential to tropospheric ozone (O<sub>3</sub>) concentrations. The O<sub>3</sub> stomatal uptake damages leaf photosynthesis and stomatal conductance and, in turn, influences O<sub>3</sub> dry deposition. Further, O<sub>3</sub> directly influences isoprene emissions, an important precursor of O<sub>3</sub>. T...
Ground-level observations, reanalyzed meteorological fields and a 3-D global chemical and transport model (GEOS-Chem) were applied in this study to investigate ozone (O3) pollution events (OPEs) in North China (36.5–40.5∘ N, 114.5–119.5∘ E) during 2014–2017. Ozone pollution days (OPDs) were defined as days with maximum daily averaged 8 h (MDA8) con...
Abstract. The terrestrial biosphere and atmospheric chemistry interact through multiple feedbacks, but the models of vegetation and chemistry are developed separately. In this study, the Yale Interactive terrestrial Biosphere (YIBs) model, a dynamic vegetation model with biogeochemical processes, is implemented into the Chemical Transport Model GEO...
Ground-level observations, reanalyzed meteorological fields and a 3-D global chemical and transport model (GEOS-Chem) were applied in this study to investigate ozone (O3) pollution events (OPEs) in North China (36.5° N–40.5° N, 114.5° E–119.5° E) during 2014–2017. Ozone pollution days (OPDs) were defined as days with maximum daily averaged 8-h (MDA...