The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.
On the widespread enhancement in fine particulate matter across the Indo-Gangetic Plain towards winter
Open accessAbstract
Fine particulate matter (PM 2.5, aerodynamic diameter ≤2.5 µm) impacts the climate, reduces visibility and severely influences human health. The Indo-Gangetic Plain (IGP), home to about one-seventh of the world’s total population and a hotspot of aerosol loading, observes strong enhancements in the PM 2.5 concentrations towards winter. We performed high-resolution (12 km × 12 km) atmospheric chemical transport modeling (WRF-Chem) for the post-monsoon to winter transition to unravel the underlying dynamics and influences of regional emissions over the region. Model, capturing the observed variations to an extent, reveals that the spatial distribution of PM 2.5 having patches of enhanced concentrations (≥100 µgm−3) during post-monsoon, evolves dramatically into a widespread enhancement across the IGP region during winter. A sensitivity simulation, supported by satellite observations of fires, shows that biomass-burning emissions over the northwest IGP play a crucial role during post-monsoon. Whereas, in contrast, towards winter, a large-scale decline in the air temperature, significantly shallower atmospheric boundary layer, and weaker winds lead to stagnant conditions (ventilation coefficient lower by a factor of ~4) thereby confining the anthropogenic influences closer to the surface. Such changes in the controlling processes from post-monsoon to winter transition profoundly affect the composition of the fine aerosols over the IGP region. The study highlights the need to critically consider the distinct meteorological processes of west-to-east IGP and changes in dominant sources from post-monsoon to winter in the formulation of future pollution mitigation policies.
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Cited by
Seasonal characteristics of PM1, PM2.5, and PM10 over Varanasi during 2019–2020
Chauhan, P. K., Kumar, A., Pratap, V., & Singh, A. K. (2022) · Frontiers in Sustainable Cities · doi:10.3389/frsc.2022.909351 · Cited by 45
Metadata
- Authors
- Ojha, N., Sharma, A., Kumar, M., Girach, I., Ansari, T. U., Sharma, S. K., Singh, N., Pozzer, A., & Gunthe, S. S.
- Venue
- Scientific Reports
- Published
- 2020-04-03
- Volume
- 10
- Issue
- 1
- Pages
- 5862-5862
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W3014490509
- Cited by
- 253
- References
- 51
- FWCI
- 11.69
- Type
- journal article
- Language
- en
- Open access
- gold
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- Ojha, N., Sharma, A., Kumar, M., Girach, I., Ansari, T. U., Sharma, S. K., Singh, N., Pozzer, A., & Gunthe, S. S. (2020). On the widespread enhancement in fine particulate matter across the Indo-Gangetic Plain towards winter. Scientific Reports. https://doi.org/10.1038/s41598-020-62710-8
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