Impact of aerosols on terrestrial gross primary productivity in North China using an improved boreal ecosystem productivity simulator with satellite-based aerosol optical depth

Yao, Feng; Chen, Dongmei; Zhao, Xinyi

doi:10.1080/15481603.2019.1682237

Cited by 15 publications

(5 citation statements)

References 47 publications

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“…Such changes in leaf microclimates resulted in an increase in sun leaf Pn during most of the day except the morning, and enhanced shade leaf Pn throughout the day. At present, studies of aerosols on ecosystem productivity mainly focused on the radiation effects of aerosols, without fully considering the accompanying changes in temperature and VPD (Feng et al, 2019a; Kanniah et al, 2012; Yue et al, 2017). Our results show that it is crucial to take into account the collective effects of changes in radiation, temperature and VPD when assessing how aerosols affect ecosystem productivity.…”

Section: Discussionmentioning

confidence: 99%

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Aerosol pollution alters the diurnal dynamics of sun and shade leaf photosynthesis through different mechanisms

Wang

et al. 2022

Plant Cell & Environment

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Anthropogenic aerosols have been shown to perturb CO 2 exchange between the vegetation and the atmosphere. However, the climate effects of aerosols through carbon cycle feedback still have significant uncertainties. Taking advantage of the periodic fluctuations of aerosol loading in Beijing, we intensively measured the diurnal course of leaf microclimates and photosynthesis under different aerosol conditions during the growing season in 2014 and 2015. We found that increasing aerosol loadings altered the diurnal course of microclimates and thus sun and shade leaf photosynthesis. Our mechanistic photosynthesis model experiments further showed that aerosol-induced increase in sun leaf photosynthesis occurred around noon and afternoon, mainly by alleviating the depression of photosynthesis caused by high leaf temperature and leaf-air vapour pressure deficit. Meanwhile, aerosols enhanced shade leaf photosynthesis throughout the day by mitigating the light limitation within the canopy, with the highest increase occurring around noon.Overall, our study suggested that aerosol's diffuse fertilization effect, cooling effect and the accompanying low leaf-air vapour pressure deficit collectively drove the changes in the diurnal courses of sun and shade leaf photosynthesis. Our results provided an important benchmark for assessing how anthropogenic aerosols regulate ecosystem C balance under different meteorological conditions.

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Section: Discussionmentioning

confidence: 99%

“…More investigation is needed to assess how aerosol-induced cooling effects alter the spatial and temporal patterns of ecosystem CO 2 exchanges, especially as summer heatwaves are becoming more prevalent. and VPD (Feng et al, 2019a;Kanniah et al, 2012;Yue et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Aerosol pollution alters the diurnal dynamics of sun and shade leaf photosynthesis through different mechanisms

Wang

et al. 2022

Plant Cell & Environment

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“…Therefore, this study innovatively incorporated WSF based on daily LSWI calculations to estimate the maximum carboxylation rate (V m ). Furthermore, BEPS, driven by meteorological data and high-precision daily LAI to couple photosynthesis, respiration, and radiative transfer, has demonstrated accuracy and reliabil-ity at several stations as well as regional and global scales [55][56][57]. Details of the simulated NPP are described below.…”

Section: Npp Simulationmentioning

confidence: 99%

Quantitative Assessment of Factors Influencing the Spatiotemporal Variation in Carbon Dioxide Fluxes Simulated by Multi-Source Remote Sensing Data in Tropical Vegetation

Xu,

Zhang,

Wang

et al. 2023

Remote Sensing

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Vegetation plays a vital role in the global carbon cycle, a function of particular significance in regulating carbon dioxide fluxes within tropical ecosystems. Therefore, it is crucial to enhance the precision of carbon dioxide flux estimates for tropical vegetation and to explore the determinants influencing carbon sequestration. In this study, Landsat series images and Sentinel-2 Multispectral Instrument satellite data were used to invert vegetation biophysical parameters, thereby improving the timeliness and resolution of state variables from the boreal ecosystem productivity simulator (BEPS). The BEPS model at a 30 m resolution was developed to accurately capture tropical vegetation carbon dioxide fluxes across Hainan Island (HN) over the preceding two decades. The impacts of climate variations and anthropogenic activities on the carbon dioxide fluxes of tropical vegetation were further quantified using quantile regression models and a land-use transfer matrix. Results indicate significant increases in both net primary productivity (NPP) and net ecosystem productivity (NEP) in HN during the period 2000–2020, by 5.81 and 4.29 g C/m2 year, respectively. Spatial trends in vegetation carbon dioxide fluxes exhibited a consistent decline from inland regions to coastal zones. Anthropogenic activities were the dominant factor in the reduced stability of coastal NPP, while the post-2005 vegetation restoration promoted the southward expansion of high NPP (>1200 g C/m2) in the central part of HN. NPP in this tropical island was more sensitive to temperature than to precipitation, with a 1 °C temperature increase resulting in 4.1 g C/m2 reduction in dry-season NPP compared to wet-season NPP. Upgrades of cropland quality and grassland restoration have improved NPP yields, and land use transfers have resulted in a 0.301 Tg C net increase in NPP. This study provides new insight into the improvement of the carbon dioxide flux model at a finer scale for tropical vegetation and highlights ecological construction as an adaptation strategy to enhance the carbon sinks of tropical vegetation under negative climate change conditions.

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“…3) Moreover, this promotion can be partly or fully offset by a reduction in direct radiation, indicating an optimal threshold for the ratio of diffuse to total radiation (k d ) (O’Sullivan et al, 2021; Park et al, 2018; Zhou et al, 2021). Based on these theories, studies have shown that the treatment of separating radiative components contribution or including k d improves the GPP simulation substantially, such as in the LUE model (Shu et al, 2022), process-based vegetation model (Feng et al, 2019), and land surface model (Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The roles of environmental conditions in the pollutant emission-induced gross primary production change: Co-contribution of meteorological fields and regulation of its background gradients

Gui

Wang

Cao

et al. 2023

Progress in Physical Geography: Earth and Environment

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Anthropogenic emissions affect vegetation photosynthesis and carbon flux through meteorological variations induced by aerosols and clouds. However, the insufficient consideration of meteorological conditions limits the understanding of relevant mechanisms, and further inhibits the projection of future terrestrial carbon balance. Based on multiple sets of model simulations, we characterized changes in gross primary production (GPP) due to three typical individual pollutants emissions (black carbon, organic carbon, and sulfate), quantified the relative contributions of co-varied environmental factors, and explored the regulatory roles of background meteorological conditions across China. Our results showed that the heterogeneous GPP enhancement induced by emissions was dominated by cloud cover (CC) change. During its short-term effect, air temperature (Tair), vapor pressure deficit (VPD), and radiation (both quality and quantity) played a collectively non-negligible role in GPP variation, among which the universal diffuse radiation fertilization effect was generally far less than the benefits of brighter, cooler, and wetter environmental conditions. However, the sensitivity of GPP to an individual environmental variable was also altered by background meteorological gradients, whose changing pattern differed substantially among factors, indicating that the meteorological-regulated vegetation optimal photosynthetic range was a trade-off among heat, water, and light instead of being controlled by the univariable. This study implies that a deeper understanding of concurrent environmental variables is an effective way to reduce uncertainties in assessing the terrestrial carbon cycle perturbation exerted by human-induced emissions, especially under future scenarios with ongoing climate change.

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Impact of aerosols on terrestrial gross primary productivity in North China using an improved boreal ecosystem productivity simulator with satellite-based aerosol optical depth

Cited by 15 publications

References 47 publications

Aerosol pollution alters the diurnal dynamics of sun and shade leaf photosynthesis through different mechanisms

Aerosol pollution alters the diurnal dynamics of sun and shade leaf photosynthesis through different mechanisms

Quantitative Assessment of Factors Influencing the Spatiotemporal Variation in Carbon Dioxide Fluxes Simulated by Multi-Source Remote Sensing Data in Tropical Vegetation

The roles of environmental conditions in the pollutant emission-induced gross primary production change: Co-contribution of meteorological fields and regulation of its background gradients

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