印度半城市地区黑碳的来源分配和 COVID-19 锁定的影响

IF 3.8 Q2 ENVIRONMENTAL SCIENCES Atmospheric Environment: X Pub Date : 2024-01-01 DOI:10.1016/j.aeaoa.2024.100243
M. Chandrakala , Renju Nandan , M. Venkat Ratnam , S. Vijaya Bhaskara Rao
{"title":"印度半城市地区黑碳的来源分配和 COVID-19 锁定的影响","authors":"M. Chandrakala ,&nbsp;Renju Nandan ,&nbsp;M. Venkat Ratnam ,&nbsp;S. Vijaya Bhaskara Rao","doi":"10.1016/j.aeaoa.2024.100243","DOIUrl":null,"url":null,"abstract":"<div><p>To reduce emissions and thereby decrease the effect of black carbon (BC) on human health and the climate, the knowledge of BC concentrations and quantification of its contributions from different sources are necessary for establishing strategies for policymakers. The lockdown due to the COVID-19 pandemic has provided a unique scenario to analyze the impact of anthropogenic activities on BC concentration and their sources. In this study, the variation in BC mass concentration (eBC), its source apportionment, absorption angstrom exponent and their inter-annual variations, and the impact of COVID-19 lockdown on BC are analyzed using a six-year observation of eBC (from the year 2016–2021) over a semi-urban location (Vijayawada (16.44°N, 80.62°E), 30m a.m.s.l) in India. BC mass concentration peaks during the morning (around 06:00–08:00 LT) and evening (after 18:00 LT) hours and is low during the daytime. High eBC is observed during the winter season whereas low eBC during the monsoon season. The source apportionment of BC is carried out using the aethalometer model and it shows that the major source of BC over the site is fossil fuel combustion (&gt;60%) along with a non-negligible contribution from biomass burning (&lt;40%). This result is supported by the absorption angstrom exponent values of less than 1.6 during all seasons. A significant decrease (30%) in the total eBC over the site is observed during the COVID-19 lockdown days. It clearly shows the impact of the reduction in the contribution from anthropogenic activities mainly vehicular and industrial emissions (fossil fuel combustion) on the BC concentration. Interestingly, even after significant reduction of fossil fuel source emission during the lockdown, 53% of BC over the observational site is still contributed by fossil fuel combustion. This obviously shows the dominance of long-range transported BC due to fossil fuel combustion over the observational site.</p></div>","PeriodicalId":37150,"journal":{"name":"Atmospheric Environment: X","volume":"21 ","pages":"Article 100243"},"PeriodicalIF":3.8000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590162124000108/pdfft?md5=8a80ac61022772bf194bc4e5b9055f32&pid=1-s2.0-S2590162124000108-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Source apportionment of black carbon and the impact of COVID-19 lockdown over a semi-urban location in India\",\"authors\":\"M. Chandrakala ,&nbsp;Renju Nandan ,&nbsp;M. Venkat Ratnam ,&nbsp;S. Vijaya Bhaskara Rao\",\"doi\":\"10.1016/j.aeaoa.2024.100243\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To reduce emissions and thereby decrease the effect of black carbon (BC) on human health and the climate, the knowledge of BC concentrations and quantification of its contributions from different sources are necessary for establishing strategies for policymakers. The lockdown due to the COVID-19 pandemic has provided a unique scenario to analyze the impact of anthropogenic activities on BC concentration and their sources. In this study, the variation in BC mass concentration (eBC), its source apportionment, absorption angstrom exponent and their inter-annual variations, and the impact of COVID-19 lockdown on BC are analyzed using a six-year observation of eBC (from the year 2016–2021) over a semi-urban location (Vijayawada (16.44°N, 80.62°E), 30m a.m.s.l) in India. BC mass concentration peaks during the morning (around 06:00–08:00 LT) and evening (after 18:00 LT) hours and is low during the daytime. High eBC is observed during the winter season whereas low eBC during the monsoon season. The source apportionment of BC is carried out using the aethalometer model and it shows that the major source of BC over the site is fossil fuel combustion (&gt;60%) along with a non-negligible contribution from biomass burning (&lt;40%). This result is supported by the absorption angstrom exponent values of less than 1.6 during all seasons. A significant decrease (30%) in the total eBC over the site is observed during the COVID-19 lockdown days. It clearly shows the impact of the reduction in the contribution from anthropogenic activities mainly vehicular and industrial emissions (fossil fuel combustion) on the BC concentration. Interestingly, even after significant reduction of fossil fuel source emission during the lockdown, 53% of BC over the observational site is still contributed by fossil fuel combustion. This obviously shows the dominance of long-range transported BC due to fossil fuel combustion over the observational site.</p></div>\",\"PeriodicalId\":37150,\"journal\":{\"name\":\"Atmospheric Environment: X\",\"volume\":\"21 \",\"pages\":\"Article 100243\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2590162124000108/pdfft?md5=8a80ac61022772bf194bc4e5b9055f32&pid=1-s2.0-S2590162124000108-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Atmospheric Environment: X\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2590162124000108\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Environment: X","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2590162124000108","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

为了减少排放,从而降低黑碳(BC)对人类健康和气候的影响,有必要了解黑碳浓度并量化不同来源的黑碳贡献,以便为决策者制定战略。COVID-19 大流行导致的封锁为分析人为活动对 BC 浓度及其来源的影响提供了一个独特的场景。在本研究中,利用对印度一个半城市地区(维贾亚瓦达(16.44°N,80.62°E),海拔 30 米)的六年 eBC 观测数据(2016-2021 年),分析了 BC 质量浓度(eBC)的变化、其来源分配、吸收角指数及其年际变化,以及 COVID-19 封锁对 BC 的影响。BC 质量浓度在早晨(6:00-08:00 时左右)和傍晚(18:00 时以后)达到峰值,白天较低。在冬季,eBC 浓度较高,而在季风季节,eBC 浓度较低。使用乙热计模型对 BC 的来源进行了分配,结果表明,该地区 BC 的主要来源是化石燃料燃烧(60%)以及不可忽略的生物质燃烧(40%)。所有季节的吸收角指数值均小于 1.6,也证明了这一结果。在 COVID-19 关闭期间,观测站上空的总 eBC 显著下降(30%)。这清楚地表明了人为活动(主要是车辆和工业排放(化石燃料燃烧))的减少对 BC 浓度的影响。有趣的是,即使在封锁期间化石燃料源排放大幅减少,观测点上空仍有 53% 的 BC 来自化石燃料燃烧。这显然表明,化石燃料燃烧导致的长程飘移在观测点上空的 BC 中占主导地位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Source apportionment of black carbon and the impact of COVID-19 lockdown over a semi-urban location in India

To reduce emissions and thereby decrease the effect of black carbon (BC) on human health and the climate, the knowledge of BC concentrations and quantification of its contributions from different sources are necessary for establishing strategies for policymakers. The lockdown due to the COVID-19 pandemic has provided a unique scenario to analyze the impact of anthropogenic activities on BC concentration and their sources. In this study, the variation in BC mass concentration (eBC), its source apportionment, absorption angstrom exponent and their inter-annual variations, and the impact of COVID-19 lockdown on BC are analyzed using a six-year observation of eBC (from the year 2016–2021) over a semi-urban location (Vijayawada (16.44°N, 80.62°E), 30m a.m.s.l) in India. BC mass concentration peaks during the morning (around 06:00–08:00 LT) and evening (after 18:00 LT) hours and is low during the daytime. High eBC is observed during the winter season whereas low eBC during the monsoon season. The source apportionment of BC is carried out using the aethalometer model and it shows that the major source of BC over the site is fossil fuel combustion (>60%) along with a non-negligible contribution from biomass burning (<40%). This result is supported by the absorption angstrom exponent values of less than 1.6 during all seasons. A significant decrease (30%) in the total eBC over the site is observed during the COVID-19 lockdown days. It clearly shows the impact of the reduction in the contribution from anthropogenic activities mainly vehicular and industrial emissions (fossil fuel combustion) on the BC concentration. Interestingly, even after significant reduction of fossil fuel source emission during the lockdown, 53% of BC over the observational site is still contributed by fossil fuel combustion. This obviously shows the dominance of long-range transported BC due to fossil fuel combustion over the observational site.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
期刊最新文献
Quantification of braking particles emission by PIV analysis — Application on railway Emission location affects impacts on atmosphere and climate from alternative fuels for Norwegian domestic aviation Variability of aerosol particle concentrations from tyre and brake wear emissions in an urban area Detection and analysis of ship emissions using single-particle mass spectrometry: A land-based field study in the port of rostock, Germany Comparison of global air pollution impacts across horizontal resolutions
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1