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| A study on variation of atmospheric pollutants over Bhubaneswar during imposition of nationwide lockdown in India for the COVID-19 pandemic | |
| Panda, Subhasmita1; Nath, Jyotishree1; Das, Trupti1; Ramasamy, Boopathy1; Mallik, Chinmay2 | |
| 2020-08 | |
| 发表期刊 | AIR QUALITY ATMOSPHERE AND HEALTH
 |
| ISSN | 1873-9318 |
| EISSN | 1873-9326 |
| 摘要 | The nationwide lockdown in India to flatten the pandemic COVID-19 curve has resulted in the reduction of anthropogenic emission sources to a great extent. This study reports change in air quality and its impact on the environment during the unique lockdown scenario at Bhubaneswar, a coastal smart city in east India. The urban air shows a remarkable reduction in the mean pollutant levels influenced by traffic emission viz. NOx (similar to 67 %) and BC (similar to 47 %) during lockdown over the pre-lockdown. Comparatively, a lower reduction of CO (similar to 14 %) is attributed to the dominance of natural atmospheric chemical regulation and biogenic sources in addition to anthropogenic contributions. In addition to the lockdown, frequent rain events due to depression in the Bay of Bengal (BoB) also had a significant role in the reduction of the primary pollutants over the study site. An enhancement of secondary pollutant viz. O-3(similar to 3%) with a distinct diurnal pattern was observed during the first phase of lockdown over the pre-lockdown period. An anti-correlation between O-3 and NOx during pre-lockdown points to a higher O-3 production potential with decreasing NOx. While a reduction in the titration of O-3 due to suppression of fresh NO emissions led to accumulation of O-3 in the first phase of lockdown, inhibited photochemistry due to cloudy skies as well as reduction in precursors led to lower O-3 values during the later phases of lockdown. |
| 关键词 | Lockdown Air quality CO NOx BC O-3 |
| DOI | 10.1007/s11869-020-00916-5 |
| WOS关键词 | AEROSOL BLACK CARBON ; SURFACE OZONE ; SEASONAL-VARIATIONS ; AIR-QUALITY ; URBAN SITE ; TROPOSPHERIC OZONE ; TEMPORAL VARIATION ; LOCAL METEOROLOGY ; EASTERN INDIA ; COASTAL SITE |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 出版者 | SPRINGER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 专题 | 新冠肺炎 循证社会科学证据集成 |
| 作者单位 | 1.CSIR Inst Minerals & Mat Technol CSIR IMMT; 2.Cent Univ Rajasthan |
| 推荐引用方式 GB/T 7714 | Panda, Subhasmita,Nath, Jyotishree,Das, Trupti,et al. A study on variation of atmospheric pollutants over Bhubaneswar during imposition of nationwide lockdown in India for the COVID-19 pandemic[J]. AIR QUALITY ATMOSPHERE AND HEALTH,2020. |
| APA | Panda, Subhasmita,Nath, Jyotishree,Das, Trupti,Ramasamy, Boopathy,&Mallik, Chinmay.(2020).A study on variation of atmospheric pollutants over Bhubaneswar during imposition of nationwide lockdown in India for the COVID-19 pandemic.AIR QUALITY ATMOSPHERE AND HEALTH. |
| MLA | Panda, Subhasmita,et al."A study on variation of atmospheric pollutants over Bhubaneswar during imposition of nationwide lockdown in India for the COVID-19 pandemic".AIR QUALITY ATMOSPHERE AND HEALTH (2020). |
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