Urban areas face environmental pollution and greenhouse emissions challenges,demand collaborative efforts to mitigation.Urban forests play a crucial role in absorbing CO_(2) emissions and contributing to carbon seques...Urban areas face environmental pollution and greenhouse emissions challenges,demand collaborative efforts to mitigation.Urban forests play a crucial role in absorbing CO_(2) emissions and contributing to carbon sequestration potential,but they also release biogenic volatile organic compounds(BVOCs),which contribute to the formation of tropospheric ozone and secondary organic aerosols(SOA).This study aimed to understand the role of urban forests in carbon stock and BVOCs emission by establishing optimal biomass models for six typical tree species(Robinia pseudoacacia,Quercus,Populus,Pinus tabulaeformis,Betula platyphylla,and Larix gmelinii)in Beijing.Biomass models were developed using field surveys and remote sensing data,with R^(2) values ranging from 0.364 to 0.921.Applying these models to forest resource inventory data,carbon stock and BVOCs emission models were constructed.In 2021,the total carbon stock for these pure forest tree species was estimated at 5.638 million tons,with a carbon density of 58.86 t/ha.The carbon density ranking for pure forest tree species was:Robinia pseudoacacia>Populus tomentosa>Betula platyphylla>Quercus Linn>Pinus tabulaeformis>Larix gmelinii.Total BVOCs emission in 2021 from the studied species were calculated at 25,789.72 t,with an average emission of 0.27 t/ha.Populus tomentosa had the highest BVOCs emission per unit area,followed by Robinia pseudoacacia,and Larix gmelinii had the smallest.Betula platyphylla and Robinia pseudoacacia were identified as species with high carbon stock and low BVOCs emissions in Beijing,offering insights for future urban forest planning and eco-friendly urban environment development strategies.展开更多
Biogenic volatile organic compounds(BVOCs) in the atmosphere play important roles in the formation of ground-level ozone and secondary organic aerosol(SOA) in global scale and also in regional scale under some conditi...Biogenic volatile organic compounds(BVOCs) in the atmosphere play important roles in the formation of ground-level ozone and secondary organic aerosol(SOA) in global scale and also in regional scale under some condition due to their large amount and relatively higher reactivity.In places with high plant cover in the tropics and in China where air pollution is serious,the effect of BVOCs on ozone and secondary organic aerosols is strong.The present research aims to provide a comprehensive review about the emission rate,emission inventory, research methods,the influencing factors of BVOCs emissions,as well as their impacts on atmospheric environment quality and human health in recent years in Asia based on the summary and analysis of literatures.It is suggested to use field direct measurement method to obtain the emission rate and model method to calculate the emission amount.Several recommendations are given for future investigation and policy development on BVOCs emission.展开更多
基金supported by the National Natural Science Foundation of China(No.42077454)the Xiong'an New Area Science and Technology Innovation Project(No.2022XACX1000)the 5·5 Engineering Research&Innovation Team Project of Beijing Forestry University(No.BLRC2023B04).
文摘Urban areas face environmental pollution and greenhouse emissions challenges,demand collaborative efforts to mitigation.Urban forests play a crucial role in absorbing CO_(2) emissions and contributing to carbon sequestration potential,but they also release biogenic volatile organic compounds(BVOCs),which contribute to the formation of tropospheric ozone and secondary organic aerosols(SOA).This study aimed to understand the role of urban forests in carbon stock and BVOCs emission by establishing optimal biomass models for six typical tree species(Robinia pseudoacacia,Quercus,Populus,Pinus tabulaeformis,Betula platyphylla,and Larix gmelinii)in Beijing.Biomass models were developed using field surveys and remote sensing data,with R^(2) values ranging from 0.364 to 0.921.Applying these models to forest resource inventory data,carbon stock and BVOCs emission models were constructed.In 2021,the total carbon stock for these pure forest tree species was estimated at 5.638 million tons,with a carbon density of 58.86 t/ha.The carbon density ranking for pure forest tree species was:Robinia pseudoacacia>Populus tomentosa>Betula platyphylla>Quercus Linn>Pinus tabulaeformis>Larix gmelinii.Total BVOCs emission in 2021 from the studied species were calculated at 25,789.72 t,with an average emission of 0.27 t/ha.Populus tomentosa had the highest BVOCs emission per unit area,followed by Robinia pseudoacacia,and Larix gmelinii had the smallest.Betula platyphylla and Robinia pseudoacacia were identified as species with high carbon stock and low BVOCs emissions in Beijing,offering insights for future urban forest planning and eco-friendly urban environment development strategies.
基金supported by the grants from Beijing Municipal Science and Technology Project(Nos.Z181100005318003 and Z181100005418015)the National Research Program for Key Issues in Air Pollution Control(No.DQGG0201)the National Natural Science Foundation of China(Nos.21976190 and 41575121)
文摘Biogenic volatile organic compounds(BVOCs) in the atmosphere play important roles in the formation of ground-level ozone and secondary organic aerosol(SOA) in global scale and also in regional scale under some condition due to their large amount and relatively higher reactivity.In places with high plant cover in the tropics and in China where air pollution is serious,the effect of BVOCs on ozone and secondary organic aerosols is strong.The present research aims to provide a comprehensive review about the emission rate,emission inventory, research methods,the influencing factors of BVOCs emissions,as well as their impacts on atmospheric environment quality and human health in recent years in Asia based on the summary and analysis of literatures.It is suggested to use field direct measurement method to obtain the emission rate and model method to calculate the emission amount.Several recommendations are given for future investigation and policy development on BVOCs emission.
