First close insight into global daily gapless 1 km PM2.5 pollution, variability, and health impact

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Dec. 15, 2023

Abstract Here we retrieve global daily 1 km gapless PM 2.5 concentrations via machine learning and big data, revealing its spatiotemporal variability at an exceptionally detailed level everywhere every day from 2017 to 2022, valuable for air quality monitoring, climate change, public health studies. We find that 96%, 82%, 53% of Earth’s populated areas are exposed unhealthy least one day, week, month in respectively. Strong disparities exposure risks duration exhibited between developed developing countries, urban rural areas, different parts cities. Wave-like dramatic changes clearly seen around the world before, during, after COVID-19 lockdowns, as is mortality burden linked fluctuating pollution events. Encouragingly, only approximately one-third all countries return pre-pandemic levels. Many nature-induced episodes also revealed, such biomass burning.

Language: Английский

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Air pollution in five Indian megacities during the Christmas and New Year celebration amidst COVID-19 pandemic

Stochastic Environmental Research and Risk Assessment, Journal Year: 2022, Volume and Issue: 36(11), P. 3653 - 3683

Published: April 2, 2022

Language: Английский

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Air pollution in three megacities of India during the Diwali festival amidst COVID-19 pandemic

Sustainable Cities and Society, Journal Year: 2021, Volume and Issue: 76, P. 103504 - 103504

Published: Oct. 29, 2021

Language: Английский

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COVID-19 vaccine preferences in India

Vaccine, Journal Year: 2022, Volume and Issue: 40(15), P. 2242 - 2246

Published: March 7, 2022

Language: Английский

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Effect of Lockdown Amid COVID-19 on Ambient Air Quality in 16 Indian Cities

Frontiers in Sustainable Cities, Journal Year: 2021, Volume and Issue: 3

Published: Sept. 29, 2021

The COVID-19 pandemic has affected severely the economic structure and health care system, among others, of India rest world. magnitude its aftermath is exceptionally devastating in India, with first case reported January 2020, number risen to ~31.3 million as July 23, 2021. imposed a complete lockdown on March 25, which impacted migrant population, industrial sector, tourism industry, overall growth. Herein, impacts unlock phases ambient atmospheric air quality variables have been assessed across 16 major cities covering north-to-south stretch country. In general, all pollutants showed substantial decrease AQI values during compared reference period (2017–2019) for almost India. On an average, about 30–50% reduction observed PM 2.5 , 10 CO, maximum 40–60% NO 2 herein, while data was average northern, western, southern SO O 3 increase over few well other cities. Maximum (49%) north period. Furthermore, changes pollution levels significant three steady subsequent phase Our results show effect loading key anthropogenic due less-to-no impact from activities vehicular emissions, relatively clean transport masses upwind region. These indicate that by adopting cleaner fuel technology avoiding poor combustion urban agglomerations could bring down at least 30%.

Language: Английский

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Advanced Statistical Analysis of Air Quality and its Health Impacts in India: Quantifying Significance by Detangling Weather-Driven Effects

Heliyon, Journal Year: 2025, Volume and Issue: 11(2), P. e41762 - e41762

Published: Jan. 1, 2025

Air quality has emerged as a significant concern due to its direct impact on human health. Over recent decades, India witnessed marked deterioration in air rising anthropogenic emissions and climate change. The COVID-19 lockdown offered unique opportunity examine pollutant reductions under restricted activities. This study conducted long-term analysis of five major Indian cities-Delhi, Kolkata, Bengaluru, Hyderabad, Visakhapatnam-by analysing variations PM2.5, PM10, NOx, NH3, SO2, CO, O3, incorporating de-weathering strategy isolate meteorological influences. In Delhi, we observed PM10 (92.50-136.70 μg/m³), NOx (62.13-151.91 ppb), CO (0.53-0.88 mg/m³), which shifted health risks from the 'extreme' 'low' category. Visakhapatnam also experienced notable declines levels (7.50-17.13 ppb). Conversely, Hyderabad exhibited no reductions, AQHI increased (+0.97) concentrations. Ozone concentrations showed increase across cities, attributed VOC-limited effects. revealed that variability long-range transport airmass played critical roles shaping These findings highlight complexity urban dynamics underscore benefits emission for public

Language: Английский

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Quantile regression modelling of herd behaviour in the Indian equity market across sectors: implications on financial market dynamics spanning the COVID-19 epoch

Journal of Modelling in Management, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Purpose This study aims to examine the evidence and magnitude of sector-specific herding behaviour in Indian equity market, focusing on COVID-19 epoch. Design/methodology/approach uses high-frequency daily data 11 sector indices National Stock Exchange from January 2010 December 2022. Cross-sectional absolute deviation quantile regression estimation methods using dummy variables are used capture skewed time series distribution across a range return quantiles sub-periods corresponding The beta herd strength variation intensity decipher impact is examined. Findings statistical results significant at lower returns entire sample period, implying herding. Notably, pre-COVID-19 during high stocks Public Sector Banks post-COVID-19 low information technology (IT) was observed. However, estimates were all sectors phase COVID-19, with IT exhibiting maximum increase strength. Research limitations/implications Robust techniques dispersion provide insights for practitioners broaden understanding market efficiency actionable responses. Furthermore, findings emphasise regulatory monitoring prevent speculative bubbles advocate targeted investor education programmes mitigate panic-driven investment decisions. Originality/value paper pioneer providing an alternative understanding, contrast traditional one, into micro-level analysis phenomenon lens instrumental broadening dynamics turbulent periods, highlighting importance informed

Language: Английский

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Managing free-roaming domestic dog populations using surgical sterilisation: a randomised controlled trial

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 24, 2025

Abstract Free-roaming domestic dogs (FRDs) are among the most abundant carnivores on earth and have coexisted with humans for over 15,000 years, yet increases in negative interactions transmission of zoonotic diseases, precipitates calls population management. Despite significant investment FRD sterilisation India, where rabies is endemic, there limited evidence its impact reducing sizes. Therefore, robust evaluation effectiveness fertility control programmes necessary. To address this, we implemented a Before After Control Intervention (BACI) framework first multi-site randomised controlled trial FRDs. We conducted single intensive campaigns five areas, achieving female coverages 58–66%. observed decrease puppies lactating females reduction residents’ reports barking, common problem associated There were no differences adult counts between intervention sites during 2-year follow-up. However, unmeasured immigration into emigration out study areas may confounded counts. One-off, albeit intense, open populations require substantial unlikely to reduce size isolation, though be some problematic behaviours improved animal welfare.

Language: Английский

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Assessment of Aerosol Optical Depth over Indian Subcontinent during COVID-19 lockdown (March–May 2020)

Environmental Monitoring and Assessment, Journal Year: 2022, Volume and Issue: 194(3)

Published: Feb. 17, 2022

Language: Английский

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Investigation of Changes in Atmospheric Pollutants due to the Cessation of Anthropogenic Activities: Spatial Heterogeneity and Complex Atmospheric Chemistry

Aerosol Science and Engineering, Journal Year: 2023, Volume and Issue: 7(2), P. 237 - 250

Published: March 13, 2023

Language: Английский

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