Journal of Atmospheric Chemistry最新文献_第5页

Carbon isotopic signatures of carbonyls from roadside air observation 路边空气观测中羰基的碳同位素特征

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-05-26 DOI: 10.1007/s10874-021-09423-y

S.J. Guo

{"title":"Carbon isotopic signatures of carbonyls from roadside air observation","authors":"S.J. Guo","doi":"10.1007/s10874-021-09423-y","DOIUrl":"10.1007/s10874-021-09423-y","url":null,"abstract":"<div>In this work, isotopic effects of carbonyls were evaluated during the simulation sampling of gaseous carbonyls by using a carbon isotope method developed, and then variation characteristics of carbon isotopic compositions were investigated for three dominant carbonyls including formaldehyde, acetaldehyde and acetone in the roadside air of Nanning for the first time. A small difference in δ13C values (0.04 to 0.50 ‰) were observed between the calculated and measured values of carbonyl-derivatives, indicating that the effect on carbon isotopic fractionation could hardly occurred in the simulation sampling of gaseous carbonyls. The roadside air measurements showed that ({delta }^{13})C values of formaldehyde, acetaldehyde and acetone were –36.02 ‰ to –31.18 ‰, –35.35 ‰ to –32.01 ‰ and –30.45 ‰ to –29.09 ‰, respectively. Further correlation of the measured ({delta }^{13})C values was good for formaldehyde, acetaldehyde and acetone (R2 = 0.6275–0.7755), indicating that their similar sources could be the direct vehicular emission or indirect productions from precursors such as hydrocarbons. Particularly, formaldehyde, acetaldehyde and acetone in the roadside air were all enriched in the early afternoon by round 0.5–6 ‰ in 13C compared to other sampling durations, which was likely due to the contributions from the positive photo-oxidation productions of hydrocarbons. Finally, it was found that all measured ({delta }^{13})C values (–36.5 ‰ to –29.0 ‰) agreed with the forecasted ({delta }^{13})C range (–43.0 ‰ to –26.0 ‰) according to the 13C mass balance of carbonyls and their precursors such as hydrocarbons, indirectly confirming such positive productions in the roadside air.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 4","pages":"239 - 250"},"PeriodicalIF":2.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09423-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5016525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerosol removal coefficients based on 7Be, 210Pb, and 210Po radionuclides in the urban atmosphere 基于城市大气中7Be、210Pb和210Po放射性核素的气溶胶去除系数

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-05-18 DOI: 10.1007/s10874-021-09422-z

Magdalena Długosz-Lisiecka

引用次数: 3

Study of seasonal variation of PM2.5 concentration associated with meteorological parameters at residential sites in Delhi, India 印度德里居民区PM2.5浓度季节变化与气象参数的关系研究

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-04-21 DOI: 10.1007/s10874-021-09419-8

Bhupendra Pratap Singh, Deepak Singh, Krishan Kumar, Vinod Kumar Jain

引用次数: 22

Source identification and exposure assessment to PM10 in the Eastern Carpathians, Romania 罗马尼亚东喀尔巴阡山脉PM10来源识别和暴露评估

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-04-14 DOI: 10.1007/s10874-021-09421-0

Réka Boga, Ágnes Keresztesi, Zsolt Bodor, Szende Tonk, Róbert Szép, Miruna Mihaela Micheu

{"title":"Source identification and exposure assessment to PM10 in the Eastern Carpathians, Romania","authors":"Réka Boga, Ágnes Keresztesi, Zsolt Bodor, Szende Tonk, Róbert Szép, Miruna Mihaela Micheu","doi":"10.1007/s10874-021-09421-0","DOIUrl":"10.1007/s10874-021-09421-0","url":null,"abstract":"<div>Observations of particulate matter less than 10 µm (PM10) were conducted from January to December in 2015 in the Ciuc basin, Eastern Carpathians, Romania. Daily concentrations of PM10 ranged from 10.90 to 167.70 µg/m3, with an annual mean concentration of 46.31 µg/m3, which is higher than the European Union limit of 40 µg/m3. Samples were analyzed for a total of 21 elements. O, C and Si were the most abundant elements accounting for about 85% of the PM10 mass. Source identification showed that the elemental composition of PM10 is represented by post volcanic activity, crustal origin, and anthropogenic sources, caused by the resuspension of crustal material, sea salt and soil dust. The average PM10 composition was 72.10% soil, 20.92% smoke K, 13.84% salt, 1.53% sulfate and 1.02% organic matter. The back-trajectory analysis showed that the majority of PM10 pollution comes from the West, Southwest and South.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 2","pages":"77 - 97"},"PeriodicalIF":2.0,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09421-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4562258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Trace gases and PM2.5-bound metal abundance over a tropical urban environment, South India 印度南部热带城市环境的微量气体和pm2.5结合的金属丰度

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-04-08 DOI: 10.1007/s10874-021-09420-1

Abdul Shukkur M, Gopikrishna V.G, Vishnu N.G, Mahesh Mohan

{"title":"Trace gases and PM2.5-bound metal abundance over a tropical urban environment, South India","authors":"Abdul Shukkur M, Gopikrishna V.G, Vishnu N.G, Mahesh Mohan","doi":"10.1007/s10874-021-09420-1","DOIUrl":"10.1007/s10874-021-09420-1","url":null,"abstract":"<div>Pre and Post-Monsoon levels of ambient SO2, NO2, PM2.5 and the trace metals Fe, Cu, etc. were measured at industrial and residential regions of the Kochi urban area in South India for a period of two years. The mean PM2.5, SO2 and NO2 concentrations across all sites were 38.98 ± 1.38 µg/m3, 2.78 ± 0.85 µg/m3 and 11.90 ± 4.68 µg/m3 respectively, which is lower than many other Indian cities. There was little difference in any on the measured species between the seasons. A few sites exceeded the NAAQS (define acronym and state standard) and most of the sites exceeded WHO (define acronym and state standard) standard for PM2.5. The average trace metal concentrations (ng/m3) were found to be Fe (32.58) > Zn (31.93) > Ni (10.13) > Cr (5.48) > Pb (5.37) > Cu (3.24). The maximum concentration of trace metals except Pb were reported in industrial areas. The enrichment factor, of metals relative to crustal material, indicated anthropogenic dominance over natural sources for the trace metal concentration in Kochi’s atmosphere. This work demonstrates the importance of air quality monitoring in this area.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 3","pages":"193 - 208"},"PeriodicalIF":2.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09420-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4328050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Source apportionment and health risks assessment of black carbon Aerosols in an urban atmosphere in East India 东印度城市大气中黑碳气溶胶的来源解析和健康风险评估

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-04-05 DOI: 10.1007/s10874-021-09418-9

Balram Ambade, Tapan Kumar Sankar

{"title":"Source apportionment and health risks assessment of black carbon Aerosols in an urban atmosphere in East India","authors":"Balram Ambade, Tapan Kumar Sankar","doi":"10.1007/s10874-021-09418-9","DOIUrl":"10.1007/s10874-021-09418-9","url":null,"abstract":"<div>Black carbon (BC) along with PM2.5 (fine particular matters) plays an important role in the assessment health effect of human beings. Winter season campaign measurements carried out for BC concentrations by using 7 different wavelengths such as 370, 470, 520, 590, 660, 880, and 950 nm, handy aethalometer (AE-33, Magee Scientific, USA), at two different locations i.e., National Institute of Technology, Jamshedpur (NIT J) and Sakchi, Jamshedpur (SAK J), in eastern India. During the study period, the mass concentration of BC varies from 4.19 µgm−3 to 15.36 µgm−3, with an average mean of 8.88 ± 2.40 µgm−3 in NIT J and SAK J, the mass concentration of BC varies from 6.3 µgm−3 to 13.48 µgm−3, with an average mean of 10.29 ± 1.58 µgm−3. However, the concentration of PM2.5 varies from 102.98 µgm−3to 198.21 µgm−3, with an average mean of 155.82 ± 29.98 µgm−3 in NIT J and SAK J, the concentration of PM2.5 varies from 110.83 µgm−3 to 207.65 µgm−3, with an average mean of 169.14 ± 22.40 µgm−3. It was reported that SAK J has a higher BC concentration compared to NIT J. This was due to heavy traffic load and dense population in SAK J. Backward Trajectories were seen that the airborne particulate matter came from differerajeshnt directions. According to the diagnostic ratio analysis of BC, it was observed that most of the BC mass concentrations come from fossil-fuel (69.70%) followed by wood-burning (30.30%) in a particular place. The overall health risk assessment of BC concentration observed during the study period was 26.70, 13.95, 24.95 and 51.32 at NIT J as well as 32.07, 16.72, 29.95 and 61.87 at SAK J, the passive cigarettes comparable concerning the risk of CVM, LC, LBW, and PLEDSC, respectively.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 3","pages":"177 - 191"},"PeriodicalIF":2.0,"publicationDate":"2021-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09418-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4196458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Ambient air characteristics of biogenic volatile organic compounds at a tropical evergreen forest site in Central Western Ghats of India 印度中西部高止山脉热带常绿森林遗址生物源性挥发性有机化合物的环境空气特征

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-01-28 DOI: 10.1007/s10874-021-09415-y

Nidhi Tripathi, L. K. Sahu, Kashyap Patel, Ashwini Kumar, Ravi Yadav

{"title":"Ambient air characteristics of biogenic volatile organic compounds at a tropical evergreen forest site in Central Western Ghats of India","authors":"Nidhi Tripathi, L. K. Sahu, Kashyap Patel, Ashwini Kumar, Ravi Yadav","doi":"10.1007/s10874-021-09415-y","DOIUrl":"10.1007/s10874-021-09415-y","url":null,"abstract":"<div>Non-methane volatile organic compounds (NMVOCs) play key roles in local and regional atmospheric chemistry as precursors for the production of ozone and secondary organic aerosols. Ambient air C2-C5 NMVOCs were measured at a tropical forest site in the central Western Ghats and urban site of Udaipur in India during the late monsoon period of 2016–17 and 2015, respectively. In the Western Ghats, air samples were collected from the protected Bhagwan Mahaveer Sanctuary. Ethene, propene, and isoprene were the dominant biogenic compounds with mean concentrations of 4.8 ± 2, 1.6 ± 0.66 and 1.05 ± 0.43 ppb, respectively. The concentrations of anthropogenic compounds such as propane and pentane were significantly lower than those of light alkenes. The contributions of ethene and propene among different NMVOCs were ~ 44 and 14%, respectively. However, the contributions of isoprene were highly variable of 3–22%. The tight correlation (r2 = 0.90) between the mixing ratios of ethene and propene and their ratio indicates their common formation and emission mechanisms. The molar emission ratio of ethene/propene (2.9 ± 0.17 ppb ppb−1) was comparable to those measured at other biogenic sites of Asia while higher than those reported for mid-latitude sites. The concentrations of light alkenes and isoprene at the Western Ghats were 4–5 times higher than those measured in an urban environment in the same season. The higher ozone formation potentials and Propylene-Equivalent concentrations of alkenes and isoprene than those of other NMVOCs indicate important implications of biogenic emissions on ozone photochemistry in the forest regions of India.<h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 2","pages":"139 - 159"},"PeriodicalIF":2.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09415-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5080867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Wet deposition ethanol concentration at US atmospheric integrated research monitoring network (AIRMoN) sites 美国大气综合研究监测网(AIRMoN)站点湿沉积乙醇浓度

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-01-25 DOI: 10.1007/s10874-020-09414-5

Bipin Sharma, J. David Felix, LaToya Myles, Tom Butler, Sarah Summerlin, Megumi S. Shimizu

{"title":"Wet deposition ethanol concentration at US atmospheric integrated research monitoring network (AIRMoN) sites","authors":"Bipin Sharma, J. David Felix, LaToya Myles, Tom Butler, Sarah Summerlin, Megumi S. Shimizu","doi":"10.1007/s10874-020-09414-5","DOIUrl":"10.1007/s10874-020-09414-5","url":null,"abstract":"<div>Ethanol concentrations measured in 178 event-based wet deposition samples collected at five Atmospheric Integrated Research Monitoring Network (AIRMoN) sites in the Eastern US between February 2018 to January 2019 ranged from below the detection limit of 19 nM to 4160 nM. The volume weighted average ethanol concentration at each site ranged from 237 nM to 1375 nM. No significant correlation was observed between ethanol and any analytes (NH4+, Cl−, SO42−, NO3−, Ca2+, Na+, Mg2+, K+, PO43− and H+) at all sites in the study, likely due to differences in atmospheric residence time and emission sources. Significant seasonal variations of ethanol were not observed for any sites, however notably higher concentrations in the winter vs. summer and growing vs. nongrowing seasons suggest photochemical dynamics play a substantial role in seasonal atmospheric concentrations. The AIRMoN concentrations were combined with previous measured ethanol wet deposition data to produce an updated empirical-based global wet deposition ethanol flux of 3.7 ± 1.8 Tg/yr (n = 1051). The carbon isotopic composition of a subset of samples ranged from −25.8 to −15.7‰ with an average of (−20.4 ± 4.0‰, n = 6). Isotope mixing model results indicate an approximately equivalent contribution of biogenic (55.2 ± 14.4%) and anthropogenic (44.8 ± 14.4%) sources of ethanol to the atmosphere over all collections sites. Results provide atmospheric scientists, environmental chemists and policy makers with baseline U.S. atmospheric ethanol concentrations in order to help determine the impact of future ethanol fuel production and to help quantify the wet deposition ethanol sink.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 2","pages":"125 - 138"},"PeriodicalIF":2.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-020-09414-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4967004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Inorganic Ionic Composition of Rainwater at a High Altitude Station over the Western Ghats in Peninsular India 印度半岛西高止山脉高海拔站雨水的无机离子组成

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-01-21 DOI: 10.1007/s10874-021-09416-x

V. V. Waghmare, M. Y. Aslam, L. Yang, P. D. Safai, G. Pandithurai

{"title":"Inorganic Ionic Composition of Rainwater at a High Altitude Station over the Western Ghats in Peninsular India","authors":"V. V. Waghmare, M. Y. Aslam, L. Yang, P. D. Safai, G. Pandithurai","doi":"10.1007/s10874-021-09416-x","DOIUrl":"https://doi.org/10.1007/s10874-021-09416-x","url":null,"abstract":"This study investigates chemical composition of rainwater (RW) and its contribution from different sources collected over the period of two years (2016 and 2017) at a high altitude location (1380?m above mean sea level) located at Mahabaleshwar situated in the Western Ghats in Peninsular India. The volume weighted mean pH of RW was found to vary between 4.57 and 7.51 (average 5.95) indicating overall alkaline nature of the RW. Prominent ionic species in the RW were Ca2+ (25%), Na+ (19%), Cl?(23%), SO42? (10%), and Mg2+ (9%) with NH4+, NO3? and K+ together forming about 8% of ionic composition. Moreover, ample presence of dust source (Ca2+) was found that acted as a major neutraliser to the acidic ions. The order of Neutralisation Factor of ions was Ca2+ > Mg2+ > NH4+. In addition, a strong correlation between Na+ and Cl? (r ≈ 0.99) further suggested substantial supplement of marine (NaCl) component to the RW. The impact of local anthropogenic activities such as fossil fuel/biomass burning was observed apart from some contribution from the long-range transport. The high contribution of non-sea salt fractions to Ca2+, SO42?, Mg2+ and K+ showed a substantial effect of crustal and continental air masses. Results of source apportionment for the RW composition by using the Positive Matrix Factorization technique indicated four factors i.e. Marine and long range transport (Na+, Cl?), crustal (Ca2+, Mg2+), emissions from the fossil fuel and biomass burning (NO3?, SO42?) and the agriculture/farming activities (NH4+).","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 1","pages":"59 - 76"},"PeriodicalIF":2.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-021-09416-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4826175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Composition dependent density of ternary aqueous solutions of ionic surfactants and salts 离子表面活性剂和盐三元水溶液的组成与密度的关系

IF 2 4区地球科学

Journal of Atmospheric Chemistry Pub Date : 2021-01-21 DOI: 10.1007/s10874-020-09411-8

Silvia M. Calderón, Nønne L. Prisle

{"title":"Composition dependent density of ternary aqueous solutions of ionic surfactants and salts","authors":"Silvia M. Calderón, Nønne L. Prisle","doi":"10.1007/s10874-020-09411-8","DOIUrl":"10.1007/s10874-020-09411-8","url":null,"abstract":"<div>Surfactants exist in atmospheric aerosols mixed with inorganic salts and can significantly influence the formation of cloud droplets due to bulk–surface partitioning and surface tension depression. To model these processes, we need continuous parametrizations of the concentration dependent properties of aqueous surfactant–salt solutions for the full composition range from pure water to pure surfactant or salt. We have developed density functions based on the pseudo-separation method and Young’s mixing rule for apparent partial molal volumes for solutions that mimic atmospheric droplets of marine environments. The developed framework requires only model parameters from binary water–salt and water–surfactant systems and includes the effect of salinity on micellization with composition-dependent functions for the critical micelle concentration (CMC). We evaluate different models and data available in the literature to find the most suitable representations of the apparent partial molal volume of sodium chloride (NaCl) in aqueous solutions and the CMC of selected atmospheric and model surfactants in pure water and aqueous NaCl solutions. We compare model results to experimental density data, available in the literature and obtained from additional measurements, for aqueous solutions containing one of the ionic surfactants sodium octanoate, sodium decanoate, sodium dodecanoate or sodium dodecylsulfate mixed with NaCl in different relative ratios. Our model follows the experimental trends of increasing densities with increasing surfactant concentrations or increasing surfactant–salt mixing ratios both, below and above the CMC, capturing the effect of the inorganic salt on the surfactant micellization.</div>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":"78 2","pages":"99 - 123"},"PeriodicalIF":2.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-020-09411-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4819332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4