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Journal articles on the topic 'BSOA'

Author: Grafiati

Published: 1 April 2023

Last updated: 31 July 2025

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1

Mentel, Th F., E. Kleist, S. Andres, et al. "Secondary aerosol formation from stress-induced biogenic emissions and possible climate feedbacks." Atmospheric Chemistry and Physics 13, no. 17 (2013): 8755–70. http://dx.doi.org/10.5194/acp-13-8755-2013.

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Abstract. Atmospheric aerosols impact climate by scattering and absorbing solar radiation and by acting as ice and cloud condensation nuclei. Biogenic secondary organic aerosols (BSOAs) comprise an important component of atmospheric aerosols. Biogenic volatile organic compounds (BVOCs) emitted by vegetation are the source of BSOAs. Pathogens and insect attacks, heat waves and droughts can induce stress to plants that may impact their BVOC emissions, and hence the yield and type of formed BSOAs, and possibly their climatic effects. This raises questions of whether stress-induced changes in BSOA

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2

Li, Yuanyuan, Zhanfang Hou, Yachen Wang, et al. "Diurnal Variations in High Time-Resolved Molecular Distributions and Formation Mechanisms of Biogenic Secondary Organic Aerosols at Mt. Huang, East China." Molecules 28, no. 16 (2023): 5939. http://dx.doi.org/10.3390/molecules28165939.

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The molecular characteristics and formation mechanism of biogenic secondary organic aerosols (BSOAs) in the forested atmosphere are poorly known. Here, we report the temporal variations in and formation processes of BSOA tracers derived from isoprene, monoterpenes, and β caryophyllene in PM2.5 samples collected at the foot of Mt. Huang (483 m a. s. l) in East China during the summer of 2019 with a 3 h time resolution. The concentrations of nearly all of the detected species, including organic carbon (OC), elemental carbon (EC), levoglucosan, and SIA (sum of SO42−, NO3−, and NH4+), were higher

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3

Lee, Alex K. Y., Jonathan P. D. Abbatt, W. Richard Leaitch, et al. "Substantial secondary organic aerosol formation in a coniferous forest: observations of both day- and nighttime chemistry." Atmospheric Chemistry and Physics 16, no. 11 (2016): 6721–33. http://dx.doi.org/10.5194/acp-16-6721-2016.

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Abstract. Substantial biogenic secondary organic aerosol (BSOA) formation was investigated in a coniferous forest mountain region in Whistler, British Columbia. A largely biogenic aerosol growth episode was observed, providing a unique opportunity to investigate BSOA formation chemistry in a forested environment with limited influence from anthropogenic emissions. Positive matrix factorization of aerosol mass spectrometry (AMS) measurement identified two types of BSOA (BSOA-1 and BSOA-2), which were primarily generated by gas-phase oxidation of monoterpenes and perhaps sesquiterpenes. The temp

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4

Lee, A. K. Y., J. P. D. Abbatt, W. R. Leaitch, et al. "Substantial secondary organic aerosol formation in a coniferous forest: observations of both day and night time chemistry." Atmospheric Chemistry and Physics Discussions 15, no. 20 (2015): 28005–35. http://dx.doi.org/10.5194/acpd-15-28005-2015.

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Abstract. Substantial biogenic secondary organic aerosol (BSOA) formation was investigated in a coniferous forest mountain region at Whistler, British Columbia. A largely biogenic aerosol growth episode was observed, providing a unique opportunity to investigate BSOA formation chemistry in a forested environment with limited influence from anthropogenic emissions. Positive matrix factorization of aerosol mass spectrometry (AMS) measurement identified two types of BSOA (BSOA-1 and BSOA-2), which were primarily generated by gas-phase oxidation of monoterpenes and perhaps sesquiterpenes. The temp

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5

Zhang, Yu-Qing, Duo-Hong Chen, Xiang Ding, et al. "Impact of anthropogenic emissions on biogenic secondary organic aerosol: observation in the Pearl River Delta, southern China." Atmospheric Chemistry and Physics 19, no. 22 (2019): 14403–15. http://dx.doi.org/10.5194/acp-19-14403-2019.

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Abstract. Secondary organic aerosol (SOA) formation from biogenic precursors is affected by anthropogenic emissions, which are not well understood in polluted areas. In this study, we accomplished a year-round campaign at nine sites in polluted areas located in the Pearl River Delta (PRD) region during 2015. We measured typical biogenic SOA (BSOA) tracers from isoprene, monoterpenes, and β-caryophyllene, as well as major gaseous and particulate pollutants and investigated the impact of anthropogenic pollutants on BSOA formation. The concentrations of BSOA tracers were in the range of 45.4 to 1

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6

Zhao, D. F., A. Buchholz, B. Kortner, et al. "Cloud condensation nuclei activity, droplet growth kinetics and hygroscopicity of biogenic and anthropogenic Secondary Organic Aerosol (SOA)." Atmospheric Chemistry and Physics Discussions 15, no. 14 (2015): 19903–45. http://dx.doi.org/10.5194/acpd-15-19903-2015.

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Abstract. Interaction of biogenic volatile organic compounds (VOC) with anthropogenic VOC affects the physicochemical properties of secondary organic aerosol (SOA). We investigated cloud droplet activation (CCN activity), droplet growth kinetics, and hygroscopicity of mixed anthropogenic and biogenic SOA (ABSOA) compared to pure biogenic SOA (BSOA) and pure anthropogenic SOA (ASOA). Selected monoterpenes and aromatics were used as representative precursors of BSOA and ASOA, respectively. We found that BSOA, ASOA, and ABSOA had similar CCN activity despite the higher oxygen to carbon ratio (O/C

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7

Zhao, D. F., A. Buchholz, B. Kortner, et al. "Cloud condensation nuclei activity, droplet growth kinetics, and hygroscopicity of biogenic and anthropogenic secondary organic aerosol (SOA)." Atmospheric Chemistry and Physics 16, no. 2 (2016): 1105–21. http://dx.doi.org/10.5194/acp-16-1105-2016.

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Abstract. Interaction of biogenic volatile organic compounds (VOCs) with Anthropogenic VOC (AVOC) affects the physicochemical properties of secondary organic aerosol (SOA). We investigated cloud droplet activation (CCN activity), droplet growth kinetics, and hygroscopicity of mixed anthropogenic and biogenic SOA (ABSOA) compared to pure biogenic SOA (BSOA) and pure anthropogenic SOA (ASOA). Selected monoterpenes and aromatics were used as representative precursors of BSOA and ASOA, respectively.We found that BSOA, ASOA, and ABSOA had similar CCN activity despite the higher oxygen to carbon rat

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8

Fang, Wenzheng, Lei Gong та Liusi Sheng. "Online analysis of secondary organic aerosols from OH-initiated photooxidation and ozonolysis of α-pinene, β-pinene, Δ3-carene and d-limonene by thermal desorption–photoionisation aerosol mass spectrometry". Environmental Chemistry 14, № 2 (2017): 75. http://dx.doi.org/10.1071/en16128.

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Environmental contextSecondary organic aerosol, formed by oxidation of volatile precursors such as monoterpenes, is a major contributor to the total atmospheric organic aerosol. We focus on the online mass spectrometric analysis of the aerosol generated by oxidation products of four major monoterpenes in an environmental chamber. Numerous important monoterpene oxidation products were clearly observed and provided a direct comparison of the formation of biogenic secondary organic aerosols. AbstractWe present here thermal desorption–tunable vacuum ultraviolet time-of-flight photoionisation aeros

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9

Deng, Yange, Hikari Yai, Hiroaki Fujinari, Kaori Kawana, Tomoki Nakayama, and Michihiro Mochida. "Diurnal variation and size dependence of the hygroscopicity of organic aerosol at a forest site in Wakayama, Japan: their relationship to CCN concentrations." Atmospheric Chemistry and Physics 19, no. 9 (2019): 5889–903. http://dx.doi.org/10.5194/acp-19-5889-2019.

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Abstract. Formation of biogenic secondary organic aerosol (BSOA) and its subsequent evolution can modify the hygroscopicity of the organic aerosol component (OA) in the forest atmosphere, and affect the concentrations of cloud condensation nuclei (CCN) there. In this study, size-resolved aerosol hygroscopic growth at 85 % relative humidity and size-resolved aerosol composition were measured using a hygroscopic tandem differential mobility analyzer and an aerosol mass spectrometer, respectively, at a forest site in Wakayama, Japan, in August and September 2015. The hygroscopicity parameter of O

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10

Hong, Youwei, Xinbei Xu, Dan Liao, et al. "Measurement report: Effects of anthropogenic emissions and environmental factors on the formation of biogenic secondary organic aerosol (BSOA) in a coastal city of southeastern China." Atmospheric Chemistry and Physics 22, no. 11 (2022): 7827–41. http://dx.doi.org/10.5194/acp-22-7827-2022.

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Abstract. To better understand the formation of biogenic secondary organic aerosol (BSOA), aerosol samples with a 4 h time resolution were collected during summer and winter in the southeast of China, along with online measurements of trace gases, aerosol chemical compositions, and meteorological parameters. The samples were analyzed by gas chromatography–mass spectrometry for PM2.5-bound secondary organic aerosol (SOA) tracers, including isoprene (SOAI), α/β-pinene (SOAM), β-caryophyllene (SOAC), and toluene (ASOA). The average concentrations of total SOA tracers in winter and summer were 38.

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11

Taller, Magdaline M., Leizel Siguenza, and Cyrille Kaye D. Tayag. "Assessing the Information and Communication Technology Proficiency of the BSOA Students, Philippines." Journal of Organizational and Human Resource Development Strategies 1, no. 01 (2024): 1–17. https://doi.org/10.56741/ohds.v1i01.674.

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This paper aimed to assess the level of Information and Communication Technology Proficiency among BSOA students, as well as the potential barriers that affected their ICT skills, including hardware operations, software processing, information management, digital communication, and data security and privacy. Additionally, it proposed an intervention program to enhance the Information and Communication Technology proficiency of BSOA students. One hundred twelve (112) 2nd to 4th-year students enrolled in the Bachelor of Science in Office Administration (BSOA) program at Camarines Sur Polytechnic

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12

Li, J. J., G. H. Wang, J. J. Cao, X. M. Wang, and R. J. Zhang. "Observation of biogenic secondary organic aerosols in the atmosphere of a mountain site in central China: temperature and relative humidity effects." Atmospheric Chemistry and Physics 13, no. 22 (2013): 11535–49. http://dx.doi.org/10.5194/acp-13-11535-2013.

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Abstract. Secondary organic aerosols (SOA) derived from isoprene, pinene and caryophyllene were determined for PM10 and size-segregated (9-stages) aerosols collected at the summit (2060 m a.s.l.) of Mt. Hua, central China during the summer of 2009. Estimated concentrations of isoprene, α-/β-pinene and β-caryophyllene derived secondary organic carbon (SOC) are 81 ± 53, 29 ± 14 and 98 ± 53 ng m−3, accounting for 2.7 ± 1.0%, 0.8 ± 0.2% and 2.1 ± 1.0% of OC, respectively. Concentrations of biogenic (BSOA, the isoprene/pinene/caryophyllene oxidation products) and anthropogenic (ASOA, mainly aromati

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13

Hallare, Syrell M., and Jocelyn O. Jintalan. "Tracer Study of Bachelor of Science in Office Administration Graduates of Camarines Sur Polytechnic Colleges." Journal of Management Studies and Development 4, no. 01 (2025): 34–48. https://doi.org/10.56741/jmsd.v4i01.815.

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The research is primarily a tracer study of the Bachelor of Science in Office Administration graduates of Camarines Sur Polytechnic Colleges, S/Y 2017-2018. Specifically, it sought to answer the personal, professional, and employment profile of the respondents, the graduates level of satisfaction on the services provided by CSPC, and the attributes that contributes to the employability of the graduates. It also identified the assessment of the employers on the job performance of the graduates. Moreover, this research proposes recommendations to improve the BSOA curriculum and enhance the emplo

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14

Nguyen, VietHung, and V.T. Pham. "Gear fault monitoring based on unsupervised feature dimensional reduction and optimized LSSVM-BSOA machine learning model." Journal of Mechanical Engineering and Sciences 16, no. 1 (2022): 8653–61. http://dx.doi.org/10.15282/jmes.16.1.2022.01.0684.

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In the trend of Industry 4.0 development, the big data of system operation is significant for analyzing, predicting, or identifying any possible problem. This study proposes a new diagnosis technique for identifying the vibration signal, which combines the feature dimensional reduction method and optimized classifier. Firstly, an auto-encoder feature dimensional reduction (AE-FDR) method is constructed with the bottleneck hidden layer to extract the low-dimensional feature. Secondly, a supervised classifier is formed to carry out fine-turning and classification. The least square-support vector

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15

Ciarelli, Giancarlo, Sara Tahvonen, Arineh Cholakian, et al. "On the formation of biogenic secondary organic aerosol in chemical transport models: an evaluation of the WRF-CHIMERE (v2020r2) model with a focus over the Finnish boreal forest." Geoscientific Model Development 17, no. 2 (2024): 545–65. http://dx.doi.org/10.5194/gmd-17-545-2024.

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Abstract. We present an evaluation of the regional chemical transport model (CTM) WRF-CHIMERE (v2020r2) for the formation of biogenic secondary organic aerosol (BSOA) with a focus over the Finnish boreal forest. Formation processes of biogenic aerosols are still affected by different sources of uncertainties, and model predictions vary greatly depending on the levels of details of the adopted chemical and emissions schemes. In this study, air quality simulations were conducted for the summer of 2019 using different organic aerosol (OA) schemes (as currently available in the literature) to trea

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16

Makkonen, R., A. Asmi, H. Korhonen, et al. "Sensitivity of aerosol concentrations and cloud properties to nucleation and secondary organic distribution in ECHAM5-HAM global circulation model." Atmospheric Chemistry and Physics 9, no. 5 (2009): 1747–66. http://dx.doi.org/10.5194/acp-9-1747-2009.

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Abstract. The global aerosol-climate model ECHAM5-HAM was modified to improve the representation of new particle formation in the boundary layer. Activation-type nucleation mechanism was introduced to produce observed nucleation rates in the lower troposphere. A simple and computationally efficient model for biogenic secondary organic aerosol (BSOA) formation was implemented. Here we study the sensitivity of the aerosol and cloud droplet number concentrations (CDNC) to these additions. Activation-type nucleation significantly increases aerosol number concentrations in the boundary layer. Incre

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17

Cholakian, Arineh, Matthias Beekmann, Isabelle Coll, Giancarlo Ciarelli, and Augustin Colette. "Biogenic secondary organic aerosol sensitivity to organic aerosol simulation schemes in climate projections." Atmospheric Chemistry and Physics 19, no. 20 (2019): 13209–26. http://dx.doi.org/10.5194/acp-19-13209-2019.

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Abstract. Organic aerosol (OA) can have important impacts on air quality and human health because of its large contribution to atmospheric fine aerosol and its chemical composition, including many toxic compounds. Simulation of this type of aerosol is difficult, since there are many unknowns in its nature and mechanism and processes involved in its formation. These uncertainties become even more important in the context of a changing climate because different mechanisms, and their representation in atmospheric models, imply different sensitivities to changes in climate variables. In this work,

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18

Li, J. J., G. H. Wang, J. J. Cao, X. M. Wang, and R. J. Zhang. "Observation of biogenic secondary organic aerosols in the atmosphere of a mountain site in central China: temperature and relative humidity effects." Atmospheric Chemistry and Physics Discussions 13, no. 7 (2013): 17643–74. http://dx.doi.org/10.5194/acpd-13-17643-2013.

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Abstract. Secondary organic aerosols (SOA) derived from isoprene, pinene and caryophyllene were determined for PM10 and size-segregated (9-stage) aerosols collected at the summit (2060 m, a.s.l.) of Mt. Hua, central China during the summer of 2009. Concentrations of estimated isoprene, α-/β-pinene and β-caryophyllene derived SOC are 81± 53, 29 ± 14 and 98 ± 53 ng m−3, accounting for 2.7± 1.0%, 0.8 ± 0.2% and 2.1 ± 1.0% of OC, respectively. Concentrations of biogenic (BSOA, the isoprene/pinene/caryophyllene oxidation products) and anthropogenic (ASOA, mainly aromatic acids) SOA positively corre

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19

Ye, Jianhuai, Jonathan P. D. Abbatt, and Arthur W. H. Chan. "Novel pathway of SO<sub>2</sub> oxidation in the atmosphere: reactions with monoterpene ozonolysis intermediates and secondary organic aerosol." Atmospheric Chemistry and Physics 18, no. 8 (2018): 5549–65. http://dx.doi.org/10.5194/acp-18-5549-2018.

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Abstract. Ozonolysis of monoterpenes is an important source of atmospheric biogenic secondary organic aerosol (BSOA). While enhanced BSOA formation has been associated with sulfate-rich conditions, the underlying mechanisms remain poorly understood. In this work, the interactions between SO2 and reactive intermediates from monoterpene ozonolysis were investigated under different humidity conditions (10 % vs. 50 %). Chamber experiments were conducted with ozonolysis of α-pinene or limonene in the presence of SO2. Limonene SOA formation was enhanced in the presence of SO2, while no significant c

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20

Cholakian, Arineh, Augustin Colette, Isabelle Coll, Giancarlo Ciarelli, and Matthias Beekmann. "Future climatic drivers and their effect on PM<sub>10</sub> components in Europe and the Mediterranean Sea." Atmospheric Chemistry and Physics 19, no. 7 (2019): 4459–84. http://dx.doi.org/10.5194/acp-19-4459-2019.

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Abstract. Multiple CMIP5 (Coupled Model Intercomparison Project phase 5) future scenarios run with the CHIMERE chemistry transport model (CTM) are compared to historic simulations in order to study some of the drivers governing air pollution. Here, the focus is on regional climate, anthropogenic emissions and long-range transport. Two major subdomains are explored – the European region and the Mediterranean Basin – with both areas showing high sensitivity to climate change. The Mediterranean area is explored in the context of the ChArMEx (the Chemistry Aerosol Mediterranean Experiment) project

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21

Sriram, K., S. P. Mangaiyarkarasi, S. Sakthivel, and L. Jebaraj. "An Extensive Study Using the Beetle Swarm Method to Optimize Single and Multiple Objectives of Various Optimal Power Flow Problems." International Transactions on Electrical Energy Systems 2023 (March 30, 2023): 1–33. http://dx.doi.org/10.1155/2023/5779700.

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An electric energy generation system, under the economic operation mode, is an imperative mission in the power system function. This article deals with the use of beetle swarm optimization algorithm (BSOA), for optimal power flow (OPF) solution, in an effective approach. BSOA is a competent optimization technique, to handle multimodal, nonlinear, and nondifferentiable objective functions. The proposed OPF is modeled by numerous objective functions, formulations with constraints, examined with thirty-one different cases, on the three distinguished test systems (IEEE 30, 57, and 118-bus), using

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22

Adewolu, Babatunde Olusegun, and Akshay Kumar Saha. "Optimal Setting of Thyristor Controlled Series Compensator with Brain Storm Optimization Algorithms for Available Transfer Capability Enhancement." International Journal of Engineering Research in Africa 58 (January 11, 2022): 225–46. http://dx.doi.org/10.4028/www.scientific.net/jera.58.225.

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Applications of Flexible AC Transmission Systems (FACTS) devices for enhancement of Available Transfer Capability (ATC) is gaining attention due to economic and technical limits of the conventional methods involving physical network expansions. FACTS allocation which is sine-qua-non to its performance is a major problem and it is being addressed in recent time with heuristic algorithms. Brain Storm Optimization Algorithms (BSOA) is a new heuristic and predicting optimization algorithms which revolutionizes human brainstorming process. BSOA is engaged for the optimum setting of FACTS devices fo

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23

Cholakian, Arineh, Matthias Beekmann, Guillaume Siour, et al. "Simulation of organic aerosol, its precursors, and related oxidants in the Landes pine forest in southwestern France: accounting for domain-specific land use and physical conditions." Atmospheric Chemistry and Physics 23, no. 6 (2023): 3679–706. http://dx.doi.org/10.5194/acp-23-3679-2023.

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Abstract. Organic aerosol (OA) still remains one of the most difficult components of the atmospheric aerosols to simulate, given the multitude of its precursors, the uncertainty in its formation pathways, and the lack of measurements of its detailed composition. The LANDEX (LANDes Experiment) project, during its intensive field campaign in summer 2017, gives us the opportunity to compare biogenic secondary OA (BSOA) and its precursors and oxidants obtained within and above the Landes forest canopy to simulations performed with CHIMERE, a state-of-the-art regional chemistry transport model. The

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24

Makkonen, R., A. Asmi, H. Korhonen, et al. "Sensitivity of aerosol concentrations and cloud properties to nucleation and secondary organic distribution in ECHAM5-HAM global circulation model." Atmospheric Chemistry and Physics Discussions 8, no. 3 (2008): 10955–98. http://dx.doi.org/10.5194/acpd-8-10955-2008.

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Abstract. The global aerosol-climate model ECHAM5-HAM was modified to improve the representation of new particle formation in the boundary layer. Activation-type nucleation mechanism was introduced to produce observed nucleation rates in lower troposphere. A simple and computationally efficient model for biogenic secondary organic aerosol (BSOA) formation was implemented. We studied the sensitivity of aerosol and cloud droplet number concentrations (CDNC) to these additions. Activation-type nucleation significantly increases aerosol number concentrations in the boundary layer. Increased partic

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25

Bornales, Sarah Mae R., Roselyn P. Manuel, Dimple S. Torres, and Jessica C. Marpuri. "Information and Communication Technology (ICT) Competencies of Students." Jurnal Genesis Indonesia 4, no. 01 (2025): 45–57. https://doi.org/10.56741/jgi.v4i01.879.

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The study aims to assess the Information and Communication Technology (ICT) competencies of Bachelor of Science in Office Administration (BSOA) third-year students at Camarines Sur Polytechnic Colleges (CSPC) in preparation for their pre-internship. The research problem centers on evaluating students’ readiness in identifying factors that influence their ICT proficiency, which is crucial for success in the modern professional workplace. The hypothesis assumes no significant relationship exists between the competency levels and the factors affecting the competencies. Using quantitative, correla

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26

Lemaire, V., I. Coll, F. Couvidat, C. Mouchel-Vallon, C. Seigneur, and G. Siour. "Oligomer formation in the troposphere: from experimental knowledge to 3-D modeling." Geoscientific Model Development Discussions 8, no. 10 (2015): 9229–79. http://dx.doi.org/10.5194/gmdd-8-9229-2015.

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Abstract. The organic fraction of atmospheric aerosols has proven to be a critical element of air quality and climate issues. However, its composition and the aging processes it undergoes remain insufficiently understood. This work builds on laboratory knowledge to simulate the formation of oligomers from biogenic secondary organic aerosol (BSOA) in the troposphere at the continental scale. We compare the results of two different modeling approaches, a 1st-order kinetic process and a pH-dependent parameterization, both implemented in the CHIMERE air quality model (AQM), to simulate the spatial

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27

Bahreini, Roya, Ravan Ahmadov, Stu A. McKeen, et al. "Sources and characteristics of summertime organic aerosol in the Colorado Front Range: perspective from measurements and WRF-Chem modeling." Atmospheric Chemistry and Physics 18, no. 11 (2018): 8293–312. http://dx.doi.org/10.5194/acp-18-8293-2018.

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Abstract. The evolution of organic aerosols (OAs) and their precursors in the boundary layer (BL) of the Colorado Front Range during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ, July–August 2014) was analyzed by in situ measurements and chemical transport modeling. Measurements indicated significant production of secondary OA (SOA), with enhancement ratio of OA with respect to carbon monoxide (CO) reaching 0.085±0.003 µg m−3 ppbv−1. At background mixing ratios of CO, up to ∼ 1.8 µg m−3 background OA was observed, suggesting significant non-combustion contribution to OA

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Ma, Jinlong, Shengqiang Zhu, Siyu Wang, Peng Wang, Jianmin Chen, and Hongliang Zhang. "Impacts of land cover changes on biogenic emission and its contribution to ozone and secondary organic aerosol in China." Atmospheric Chemistry and Physics 23, no. 7 (2023): 4311–25. http://dx.doi.org/10.5194/acp-23-4311-2023.

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Abstract. The greening impacts on China from 2000 to 2017 led to an increase in vegetated areas and thus enhanced biogenic volatile organic compound (BVOC) emissions. BVOCs are regarded as important precursors for ozone (O3) and secondary organic aerosol (SOA). As a result, accurate estimation of BVOC emissions is critical to understand their impacts on air quality. In this study, the Model of Emissions of Gases and Aerosols from Nature (MEGAN) v2.1 was used to investigate the impact of different leaf area index (LAI) and land cover (LC) datasets on BVOC emissions in China in 2016, and the eff

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29

Bergström, R., H. A. C. Denier van der Gon, A. S. H. Prévôt, K. E. Yttri, and D. Simpson. "Modelling of organic aerosols over Europe (2002–2007) using a volatility basis set (VBS) framework with application of different assumptions regarding the formation of secondary organic aerosol." Atmospheric Chemistry and Physics Discussions 12, no. 2 (2012): 5425–85. http://dx.doi.org/10.5194/acpd-12-5425-2012.

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Abstract. A new organic aerosol (OA) module has been implemented into the EMEP chemical transport model. Four different volatility basis set (VBS) schemes have been tested in long-term simulations for Europe, covering the six years 2002–2007. Different assumptions regarding partitioning of primary OA (POA) and aging of POA and secondary OA (SOA), have been explored. Model results are compared to filter measurements, AMS-data and source-apportionment studies, as well as to other model studies. The present study indicates that many different sources contribute significantly to OA in Europe. Foss

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30

Heald, Colette L., and Jeffrey A. Geddes. "The impact of historical land use change from 1850 to 2000 on secondary particulate matter and ozone." Atmospheric Chemistry and Physics 16, no. 23 (2016): 14997–5010. http://dx.doi.org/10.5194/acp-16-14997-2016.

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Abstract. Anthropogenic land use change (LUC) since preindustrial (1850) has altered the vegetation distribution and density around the world. We use a global model (GEOS-Chem) to assess the attendant changes in surface air quality and the direct radiative forcing (DRF). We focus our analysis on secondary particulate matter and tropospheric ozone formation. The general trend of expansion of managed ecosystems (croplands and pasturelands) at the expense of natural ecosystems has led to an 11 % decline in global mean biogenic volatile organic compound emissions. Concomitant growth in agricultura

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31

Lemaire, Vincent, Isabelle Coll, Florian Couvidat, Camille Mouchel-Vallon, Christian Seigneur, and Guillaume Siour. "Oligomer formation in the troposphere: from experimental knowledge to 3-D modeling." Geoscientific Model Development 9, no. 4 (2016): 1361–82. http://dx.doi.org/10.5194/gmd-9-1361-2016.

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Abstract. The organic fraction of atmospheric aerosols has proven to be a critical element of air quality and climate issues. However, its composition and the aging processes it undergoes remain insufficiently understood. This work builds on laboratory knowledge to simulate the formation of oligomers from biogenic secondary organic aerosol (BSOA) in the troposphere at the continental scale. We compare the results of two different modeling approaches, a first-order kinetic process and a pH-dependent parameterization, both implemented in the CHIMERE air quality model (AQM) (www.lmd.polytechnique

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32

Park, Hyeon-Yeong, Sung-Chul Hong, Jae-Bum Lee, and Seog-Yeon Cho. "Modeling of Organic Aerosol in Seoul Using CMAQ with AERO7." Atmosphere 14, no. 5 (2023): 874. http://dx.doi.org/10.3390/atmos14050874.

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The Community Multiscale Air Quality (CMAQ) model with the 7th generation aerosol module (AERO7) was employed to simulate organic aerosol (OA) in Seoul, Korea, for the year 2016. The goal of the present study includes the 1-year simulation of OA using WRF-CMAQ with recently EPA-developed AERO7 with pcVOC (potential VOC from combustion) scale factor revision and analysis of the seasonal behavior of OA surrogate species in Seoul. The AERO7, the most recent version of the aerosol module of the CMAQ model, includes a new secondary organic aerosol (SOA) species, pcSOA (potential SOA from combustion

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Silva, Paula Monique Carvalho, Sandra Catia Pereira Uchôa, José Beethoven Figueiredo Barbosa, Victorio Jacob Bastos, José Maria Arcanjo Alves, and Lusiane Chaves Farias. "Efeito do potássio e do calcário na qualidade de mudas de cedro doce (Bombacopsis quinata)." REVISTA AGRO@MBIENTE ON-LINE 7, no. 1 (2013): 63. http://dx.doi.org/10.18227/1982-8470ragro.v7i1.842.

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A nutrição adequada da plântula durante a fase de viveiro é determinante para reduzir o tempo de transplantio e pegamento no campo. O cedro doce, embora seja explorado comercialmente, carece de informações científicas acerca do seu processo produtivo, sobretudo na fase de viveiro. Objetivou-se, portanto, com esse estudo, avaliar dois níveis de correção da acidez do substrato com calcário dolomítico (PRNT 100%) e cinco doses de potássio na forma de KCl (0; 5; 10; 15 e 30 mg planta-1 de K2O), aplicadas em cobertura, por meio foliar, para mudas de cedro doce em estágio inicial de desenvolvimento,

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Deshmukh, Dhananjay Kumar, M. Mozammel Haque, Yongwon Kim, and Kimitaka Kawamura. "Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources." Atmospheric Chemistry and Physics 19, no. 22 (2019): 14009–29. http://dx.doi.org/10.5194/acp-19-14009-2019.

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Abstract. PM2.5 aerosols were collected at Fairbanks (64.51∘ N and 147.51∘ W) in central Alaska during the summer of 2009 and analyzed for organic tracer compounds using a gas chromatograph–mass spectrometer. The organic compounds were grouped into 14 classes based on their functional groups and sources. Concentrations of the total organics measured ranged from 113 to 1664 ng m−3 (avg 535 ng m−3). Anhydrosugars (avg 186 ng m−3) and n-alkanoic acids (avg 185 ng m−3) were 2 major classes among the 14 compound classes. The similar temporal trends and strong positive correlations among anhydrosuga

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Ashworth, K., G. Folberth, C. N. Hewitt, and O. Wild. "Impacts of near-future cultivation of biofuel feedstocks on atmospheric composition and local air quality." Atmospheric Chemistry and Physics 12, no. 2 (2012): 919–39. http://dx.doi.org/10.5194/acp-12-919-2012.

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Abstract. Large-scale production of feedstock crops for biofuels will lead to land use changes. We quantify the effects of realistic land use change scenarios for biofuel feedstock production on isoprene emissions and hence atmospheric composition and chemistry using the HadGEM2 model. Two feedstocks are considered: oil palm for biodiesel in the tropics and short rotation coppice (SRC) in the mid-latitudes. In total, 69 Mha of oil palm and 9 Mha of SRC are planted, each sufficient to replace just over 1% of projected global fossil fuel demand in 2020. Both planting scenarios result in increase

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Ashworth, K., G. Folberth, C. N. Hewitt, and O. Wild. "Impacts of near-future cultivation of biofuel feedstocks on atmospheric composition and local air quality." Atmospheric Chemistry and Physics Discussions 11, no. 9 (2011): 24857–81. http://dx.doi.org/10.5194/acpd-11-24857-2011.

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Abstract. Large-scale production of feedstock crops for biofuels will lead to land-use changes. We quantify the effects of realistic land use change scenarios for biofuel feedstock production on isoprene emissions and hence atmospheric composition and chemistry using the HadGEM2 model. Two feedstocks are considered: oil palm for biodiesel in the tropics and short rotation coppice (SRC) in the mid-latitudes. In total, 69 Mha of oil palm and 92 Mha of SRC are planted, each sufficient to replace just over 1 % of projected global fossil fuel demand in 2020. Both planting scenarios result in increa

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Li, Ziyue, Emma L. D'Ambro, Siegfried Schobesberger, et al. "A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements." Atmospheric Chemistry and Physics 20, no. 4 (2020): 2489–512. http://dx.doi.org/10.5194/acp-20-2489-2020.

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Abstract. One of the challenges of understanding atmospheric organic aerosol (OA) particles stems from its complex composition. Mass spectrometry is commonly used to characterize the compositional variability of OA. Clustering of a mass spectral dataset helps identify components that exhibit similar behavior or have similar properties, facilitating understanding of sources and processes that govern compositional variability. Here, we developed an algorithm for clustering mass spectra, the noise-sorted scanning clustering (NSSC), appropriate for application to thermal desorption measurements of

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Vella, Ryan, Matthew Forrest, Andrea Pozzer, et al. "Influence of land cover change on atmospheric organic gases, aerosols, and radiative effects." Atmospheric Chemistry and Physics 25, no. 1 (2025): 243–62. https://doi.org/10.5194/acp-25-243-2025.

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Abstract. Biogenic volatile organic compounds (BVOCs) are emitted in large quantities from the terrestrial biosphere and play a significant role in atmospheric gaseous and aerosol compositions. Secondary organic aerosols (SOAs) resulting from BVOC oxidation affect the radiation budget both directly, through the scattering and absorption of sunlight, and indirectly, by modifying cloud properties. Human activities have extensively altered natural vegetation cover, primarily by converting forests into agricultural land. In this work, a global atmospheric chemistry–climate model, coupled with a dy

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Jose, Jithina, and T. Sasipraba. "Estimation of Higher Heating Value for MSW Using DSVM and BSOA." Intelligent Automation & Soft Computing 36, no. 1 (2023): 573–88. http://dx.doi.org/10.32604/iasc.2023.030479.

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Yttri, Karl Espen, Are Bäcklund, Franz Conen, et al. "Composition and sources of carbonaceous aerosol in the European Arctic at Zeppelin Observatory, Svalbard (2017 to 2020)." Atmospheric Chemistry and Physics 24, no. 4 (2024): 2731–58. http://dx.doi.org/10.5194/acp-24-2731-2024.

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Abstract. We analyzed long-term measurements of organic carbon, elemental carbon, and source-specific organic tracers from 2017 to 2020 to constrain carbonaceous aerosol sources in the rapidly changing Arctic. Additionally, we used absorption photometer (Aethalometer) measurements to constrain equivalent black carbon (eBC) from biomass burning and fossil fuel combustion, using positive matrix factorization (PMF). Our analysis shows that organic tracers are essential for understanding Arctic carbonaceous aerosol sources. Throughout 2017 to 2020, levoglucosan exhibited bimodal seasonality, refle

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Haque, Md Mozammel, Yanlin Zhang, Srinivas Bikkina, Meehye Lee, and Kimitaka Kawamura. "Regional heterogeneities in the emission of airborne primary sugar compounds and biogenic secondary organic aerosols in the East Asian outflow: evidence for coal combustion as a source of levoglucosan." Atmospheric Chemistry and Physics 22, no. 2 (2022): 1373–93. http://dx.doi.org/10.5194/acp-22-1373-2022.

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Abstract. Biomass burning (BB) significantly influences the chemical composition of organic aerosols (OAs) in the East Asian outflow. The source apportionment of BB-derived OA is an influential factor for understanding their regional emissions, which is crucial for reducing uncertainties in their projected climate and health effects. We analyzed here three different classes of atmospheric sugar compounds (anhydrosugars, primary sugars, and sugar alcohols) and two types of biogenic secondary organic aerosol (BSOA) tracers (isoprene- and monoterpene-derived SOA products) from a year-long study t

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Rindelaub, Joel D., Carlos H. Borca, Matthew A. Hostetler та ін. "The acid-catalyzed hydrolysis of an <i>α</i>-pinene-derived organic nitrate: kinetics, products, reaction mechanisms, and atmospheric impact". Atmospheric Chemistry and Physics 16, № 23 (2016): 15425–32. http://dx.doi.org/10.5194/acp-16-15425-2016.

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Abstract. The production of atmospheric organic nitrates (RONO2) has a large impact on air quality and climate due to their contribution to secondary organic aerosol and influence on tropospheric ozone concentrations. Since organic nitrates control the fate of gas phase NOx (NO + NO2), a byproduct of anthropogenic combustion processes, their atmospheric production and reactivity is of great interest. While the atmospheric reactivity of many relevant organic nitrates is still uncertain, one significant reactive pathway, condensed phase hydrolysis, has recently been identified as a potential sin

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Gkatzelis, Georgios I., Ralf Tillmann, Thorsten Hohaus, et al. "Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: a study on freshly formed and aged biogenic SOA." Atmospheric Measurement Techniques 11, no. 3 (2018): 1481–500. http://dx.doi.org/10.5194/amt-11-1481-2018.

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Abstract. An intercomparison of different aerosol chemical characterization techniques has been performed as part of a chamber study of biogenic secondary organic aerosol (BSOA) formation and aging at the atmosphere simulation chamber SAPHIR (Simulation of Atmospheric PHotochemistry In a large Reaction chamber). Three different aerosol sampling techniques – the aerosol collection module (ACM), the chemical analysis of aerosol online (CHARON) and the collection thermal-desorption unit (TD) were connected to proton transfer reaction time-of-flight mass spectrometers (PTR-ToF-MSs) to provide chem

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Bergström, R., M. Hallquist, D. Simpson, J. Wildt, and T. F. Mentel. "Biotic stress: a significant contributor to organic aerosol in Europe?" Atmospheric Chemistry and Physics Discussions 14, no. 9 (2014): 13603–47. http://dx.doi.org/10.5194/acpd-14-13603-2014.

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Abstract. We have investigated the potential impact on organic aerosol formation from biotic stress-induced emissions (SIE) of organic molecules from forests in Europe (North of Lat. 45° N). Emission estimates for sesquiterpenes (SQT), methyl salicylate (MeSA) and unsaturated C17-compounds, due to different stressors, are based on experiments in the Jülich Plant Atmosphere Chamber (JPAC), combined with estimates of the fraction of stressed trees in Europe based on reported observed tree damage. SIE were introduced in the EMEP MSC-W chemical transport model and secondary organic aerosol (SOA) y

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Bergström, R., M. Hallquist, D. Simpson, J. Wildt, and T. F. Mentel. "Biotic stress: a significant contributor to organic aerosol in Europe?" Atmospheric Chemistry and Physics 14, no. 24 (2014): 13643–60. http://dx.doi.org/10.5194/acp-14-13643-2014.

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Abstract. We have investigated the potential impact on organic aerosol formation from biotic stress-induced emissions (SIE) of organic molecules from forests in Europe (north of lat. 45° N). Emission estimates for sesquiterpenes (SQT), methyl salicylate (MeSA) and unsaturated C17 compounds, due to different stressors, are based on experiments in the Jülich Plant Atmosphere Chamber (JPAC), combined with estimates of the fraction of stressed trees in Europe based on reported observed tree damage. SIE were introduced in the EMEP MSC-W chemical transport model and secondary organic aerosol (SOA) y

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Kari, Eetu, Liqing Hao, Arttu Ylisirniö, et al. "Potential dual effect of anthropogenic emissions on the formation of biogenic secondary organic aerosol (BSOA)." Atmospheric Chemistry and Physics 19, no. 24 (2019): 15651–71. http://dx.doi.org/10.5194/acp-19-15651-2019.

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Abstract. The fraction of gasoline direct-injection (GDI) vehicles comprising the total vehicle pool is projected to increase in the future. However, thorough knowledge about the influence of GDI engines on important atmospheric chemistry processes is missing – namely, their contribution to secondary organic aerosol (SOA) precursor emissions, contribution to SOA formation, and potential role in biogenic–anthropogenic interactions. The objectives of this study were to (1) characterize emissions from modern GDI vehicles and investigate their role in SOA formation chemistry and (2) investigate bi

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Karnezi, Eleni, Liine Heikkinen, Markku Kulmala, and Spyros N. Pandis. "Simulating Atmospheric Organic Aerosol in the Boreal Forest Using Its Volatility-Oxygen Content Distribution." Atmosphere 14, no. 5 (2023): 763. http://dx.doi.org/10.3390/atmos14050763.

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Various parameterizations of organic aerosol (OA) formation and its subsequent evolution in the two-dimensional Volatility Basis Set (2D-VBS) framework are evaluated using ground measurements collected in the 2013 PEGASOS field campaign in the boreal forest station of Hyytiälä in southern Finland. A number of chemical aging schemes that performed well in the polluted environment of the Po Valley in Italy during the PEGASOS 2012 campaign are examined, taking into account various functionalization and fragmentation pathways for biogenic and anthropogenic OA components. All seven aging schemes co

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Zubkova, Tatyana, Alexey Butov, Dmitry Vinogradov, and Guladi Gogmachadze. "The effectiveness of the use of biological products in the technology of growing tomatoes in protected ground." АгроЭкоИнфо 2, no. 56 (2023): 33. http://dx.doi.org/10.51419/202132233.

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An important issue in vegetable growing is obtaining environmentally friendly and high-yielding products throughout the year. The purpose of the research was to evaluate the effective-ness of biological products in the technology of growing tomatoes in greenhouses. The studies were carried out in 2021-2022 in the conditions of the YSU greenhouse. I.A. Bunin. A compara-tive evaluation of the effectiveness of the use of biopreparations of the GumiAgro and BSKA-3 series on Merlis hybrid tomato plants was carried out. The maximum height of plants was noted on the variants treated with the preparat

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Brüggemann, Martin, Laurent Poulain, Andreas Held, et al. "Real-time detection of highly oxidized organosulfates and BSOA marker compounds during the F-BEACh 2014 field study." Atmospheric Chemistry and Physics 17, no. 2 (2017): 1453–69. http://dx.doi.org/10.5194/acp-17-1453-2017.

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Abstract. The chemical composition of ambient organic aerosols was analyzed using complementary mass spectrometric techniques during a field study in central Europe in July 2014 (Fichtelgebirge – Biogenic Emission and Aerosol Chemistry, F-BEACh 2014). Among several common biogenic secondary organic aerosol (BSOA) marker compounds, 93 acidic oxygenated hydrocarbons were detected with elevated abundances and were thus attributed to be characteristic for the organic aerosol mass at the site. Monoterpene measurements exhibited median mixing ratios of 1.6 and 0.8 ppbV for in and above canopy levels

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Karnezi, Eleni, Benjamin N. Murphy, Laurent Poulain, et al. "Simulation of atmospheric organic aerosol using its volatility–oxygen-content distribution during the PEGASOS 2012 campaign." Atmospheric Chemistry and Physics 18, no. 14 (2018): 10759–72. http://dx.doi.org/10.5194/acp-18-10759-2018.

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Abstract. A lot of effort has been made to understand and constrain the atmospheric aging of the organic aerosol (OA). Different parameterizations of the organic aerosol formation and evolution in the two-dimensional volatility basis set (2D-VBS) framework are evaluated using ground and airborne measurements collected in the 2012 Pan-European Gas AeroSOls-climate interaction Study (PEGASOS) field campaign in the Po Valley (Italy). A number of chemical aging schemes are examined, taking into account various functionalization and fragmentation pathways for biogenic and anthropogenic OA component

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