Sagnik Dey
Datos Biográficos
| ID | 6720441 |
|---|---|
| NOMBRE | Sagnik Dey |
| NOMBRES | Sagnik |
| APELLIDO | Dey |
| FIRMA | DEY S |
| AFILIACIONES | Indian Institute of Technology Delhi |
| ORCID | 0000-0002-0604-0869 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 23 |
| TOTAL DE CITAS | 2 |
| TOTAL COMO AUTOR | 23 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2017 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 1 |
Phase-Resolved Impacts of Daytime, Nighttime, and Compound Heatwaves on Urban Air Quality in Delhi
India’s peak air pollution puzzle
Understanding the interplay of emissions, meteorology, transboundary transport and chemistry is essential to explain India’s persistent air pollution, particularly during the post-monsoon and early winter months when particulate matter (PM2.5) levels peak across the country. This study quantifies the relative contributions of these drivers to population-weighted nationally averaged PM2.5 concentrations and their variability from 2017 to 2021 in t…
The role of antioxidant nutrients in mitigating PM2.5-related health risks in young Indian children
Introduction Pollution (PM 2.5 ) exposure can result in acute respiratory illness (ARI) and anaemia in children. We aimed to investigate if antioxidant nutrient intakes could mitigate the impact of PM 2.5 on child health outcomes on a national scale in India. Methods We triangulated satellite-derived PM 2.5 exposure data at the primary sampling unit level, with ARI and anaemia prevalence data from national district-level survey, and antioxidant n…
A protocol for estimating health burden posed by early life exposure to ambient fine particulate matter and its heavy metal composition
Background: Pregnant women and children are vulnerable to air pollution-related adverse health effects, especially those residing in low-resource and high-exposure settings like India. However, evidence regarding the effects of early-life exposure to air particulate matter (PM) on childhood growth/developmental trajectory is contradictory; evidence about specific constituents of PM, like heavy metals, is limited. Similarly, there are few Indian c…
Higher in-utero exposure to greenspace can reduce the prevalence of low birth weight in India
An emerging body of evidence suggests that exposure to residential greenspace may provide reproductive health benefits to mothers during pregnancy by promoting physical activity and reducing exposure to environmental risks. Here, we addressed this evidence gap in India and assessed the association between residential greenspace and the prevalence of low birth weight (LBW) (birth weight ⩽2500 g) among Indian mothers. We analyzed health and demogra…
Dipole pattern in aerosol-induced atmospheric warming trends over the Indian subcontinent in the last two decades
Understanding the patterns of aerosol-induced perturbation in radiation budget and its drivers is crucial in climate science. Here, we examined spatio-temporal trends in aerosol-induced atmospheric warming and the top-of-the-atmosphere (TOA) and surface cooling over the Indian Subcontinent under clear-sky and all-sky conditions using clouds and the earth’s radiant energy system data for the period 2000–2021. Overall, the regional mean TOA and sur…
A framework for city-specific air quality health index
Air quality index (AQI) is a crucial tool for communicating the health risks of air quality to the public. However, the current AQI in India does not consider the health impacts of exposure to air pollutants, necessitating the development of air quality health index (AQHI). Here, we proposed a framework for developing city-specific AQHI that better reflects local air quality and associated health risks using air pollution and health data from two…
Future photovoltaic potential in India
India has set ambitious solar energy targets to meet its climate commitments. However, climate change, already evident in the country, poses significant challenges to solar power generation. Therefore, assessing the impact of climate change on future photovoltaic potential in India is essential. This study evaluates the mid-century (2041–2050) solar photovoltaic potential across Indian power grids using CMIP6 models under two scenarios: SSP2-4.5 …
Exposure to ambient PM 2.5 and its association with the loss of labor productivity of manufacturing plants in India
Evidence of the impacts of ambient air pollution on health in India has been expanding. However, the economic impact of air pollution has rarely been explored. Here, we examined the impact of exposure to ambient fine particulate matter (PM 2.5 ) derived from satellite data at 1 km × 1 km resolution on the productivity of the manufacturing plants using a micro-level dataset for the period 2008–2009 and 2009–2010 across 465 districts in India. Usin…
Modelling ambient PM 2.5 exposure at an ultra-high resolution and associated health burden in megacity Delhi
Deriving hyperlocal information about fine particulate matter (PM 2.5 ) is critical for quantifying exposure disparities and managing air quality at neighborhood scales in cities. Delhi is one of the most polluted megacities in the world, where ground-based monitoring was limited before 2017. Here we estimate ambient PM 2.5 exposure at 100 m × 100 m spatial resolution for the period 2002–2019 using the random forest model. The model-predicted dai…
Atmospheric elemental carbon pollution and its regional health disparities in China
Previous studies have reported that atmospheric elemental carbon (EC) may pose potentially elevated toxicity when compared to total ambient fine particulate matter (PM 2.5 ). However, most research on EC has been conducted in the US and Europe, whereas China experiences significantly higher EC pollution levels. Investigating the health impact of EC exposure in China presents considerable challenges due to the absence of a monitoring network to do…
High ambient air pollution erodes the benefits of using clean cooking fuel in preventing low birth weight in India
A large fraction of the population in rural India continues to use biomass fuel for cooking and heating. In-utero exposure to the resulting household air pollution (HAP), is known to increase the risk of low birth weight (LBW). Mitigating HAP, by shifting to clean cooking fuel (CCF), is expected to minimize the risk associated with LBW. However, India also has high levels of ambient air pollution (AAP). Whether exposure to AAP modifies the effect…
Cleaner air would enhance India’s annual solar energy production by 6–28 TWh
India has set a target of 100 GW solar installation capacity by the year 2022. However, the loss of solar energy due to environmental factors like air pollution is not properly considered in renewable energy resource assessments. Here we show that India lost 29% of its utilizable global horizontal irradiance potential due to air pollution between 2001 and 2018. The average loss in output incurred by solar power systems with horizontal, fixed-tilt…
Systematizing the approach to air quality measurement and analysis in low and middle income countries
Reducing the burden of anaemia in Indian women of reproductive age with clean-air targets
Global, regional, and national progress towards Sustainable Development Goal 3.2 for neonatal and child health
BACKGROUND: Sustainable Development Goal 3.2 has targeted elimination of preventable child mortality, reduction of neonatal death to less than 12 per 1000 livebirths, and reduction of death of children younger than 5 years to less than 25 per 1000 livebirths, for each country by 2030. To understand current rates, recent trends, and potential trajectories of child mortality for the next decade, we present the Global Burden of Diseases, Injuries, a…
Health and economic impact of air pollution in the states of India
BACKGROUND: The association of air pollution with multiple adverse health outcomes is becoming well established, but its negative economic impact is less well appreciated. It is important to elucidate this impact for the states of India. METHODS: We estimated exposure to ambient particulate matter pollution, household air pollution, and ambient ozone pollution, and their attributable deaths and disability-adjusted life-years in every state of Ind…
Crop Fires and Cardiovascular Health – A Study from North India
We examine the impact of exposure to biomass burning events (primarily crop burning) on the prevalence of hypertension in four North Indian states. We use data from the National Family Health Survey-IV for 2015-16 and employ a multivariate logistic and linear model to estimate the effect of exposure to biomass burning on the prevalence of hypertension and blood pressure, respectively. The adjusted odds ratio of hypertension among individuals livi…
Aerosol-modulated heat stress in the present and future climate of India
Heat stress is one of the leading natural causes of mortality in India. Aerosols can potentially impact heat stress by modulating the meteorological conditions via radiative feedback. However, a quantitative understanding of such an impact is lacking. Here, using a chemical transport model, Weather Research Forecasting model coupled with chemistry, we show that high aerosol loading in India was able to mask the heat stress (quantified by the wet …
Changing risk factors that contribute to premature mortality from ambient air pollution between 2000 and 2015
Exposure to ambient air pollution is a major global health risk factor. Using recently updated hazard ratio functions, we estimate that the global premature mortality burden attributable to ambient PM 2.5 and O 3 exposure increased by about 30% and 17%, respectively, from 2000 to 2015. We analyzed these trends in terms of tradeoffs between changes in baseline mortality, population size, age distribution and exposure. Global population growth alon…
The impact of air pollution on deaths, disease burden, and life expectancy across the states of India
Background Air pollution is a major planetary health risk, with India estimated to have some of the worst levels globally. To inform action at subnational levels in India, we estimated the exposure to air pollution and its impact on deaths, disease burden, and life expectancy in every state of India in 2017. Methods We estimated exposure to air pollution, including ambient particulate matter pollution, defined as the annual average gridded concen…
Nations within a nation
BACKGROUND: 18% of the world's population lives in India, and many states of India have populations similar to those of large countries. Action to effectively improve population health in India requires availability of reliable and comprehensive state-level estimates of disease burden and risk factors over time. Such comprehensive estimates have not been available so far for all major diseases and risk factors. Thus, we aimed to estimate the dise…
Traffic intervention” policy fails to mitigate air pollution in megacity Delhi
Nations within a nation
BACKGROUND: 18% of the world's population lives in India, and many states of India have populations similar to those of large countries. Action to effectively improve population health in India requires availability of reliable and comprehensive state-level estimates of disease burden and risk factors over time. Such comprehensive estimates have not been available so far for all major diseases and risk factors. Thus, we aimed to estimate the dise…
Traffic intervention” policy fails to mitigate air pollution in megacity Delhi
The impact of air pollution on deaths, disease burden, and life expectancy across the states of India
Background Air pollution is a major planetary health risk, with India estimated to have some of the worst levels globally. To inform action at subnational levels in India, we estimated the exposure to air pollution and its impact on deaths, disease burden, and life expectancy in every state of India in 2017. Methods We estimated exposure to air pollution, including ambient particulate matter pollution, defined as the annual average gridded concen…
Changing risk factors that contribute to premature mortality from ambient air pollution between 2000 and 2015
Exposure to ambient air pollution is a major global health risk factor. Using recently updated hazard ratio functions, we estimate that the global premature mortality burden attributable to ambient PM 2.5 and O 3 exposure increased by about 30% and 17%, respectively, from 2000 to 2015. We analyzed these trends in terms of tradeoffs between changes in baseline mortality, population size, age distribution and exposure. Global population growth alon…
Global, regional, and national progress towards Sustainable Development Goal 3.2 for neonatal and child health
BACKGROUND: Sustainable Development Goal 3.2 has targeted elimination of preventable child mortality, reduction of neonatal death to less than 12 per 1000 livebirths, and reduction of death of children younger than 5 years to less than 25 per 1000 livebirths, for each country by 2030. To understand current rates, recent trends, and potential trajectories of child mortality for the next decade, we present the Global Burden of Diseases, Injuries, a…
Health and economic impact of air pollution in the states of India
BACKGROUND: The association of air pollution with multiple adverse health outcomes is becoming well established, but its negative economic impact is less well appreciated. It is important to elucidate this impact for the states of India. METHODS: We estimated exposure to ambient particulate matter pollution, household air pollution, and ambient ozone pollution, and their attributable deaths and disability-adjusted life-years in every state of Ind…
Crop Fires and Cardiovascular Health – A Study from North India
We examine the impact of exposure to biomass burning events (primarily crop burning) on the prevalence of hypertension in four North Indian states. We use data from the National Family Health Survey-IV for 2015-16 and employ a multivariate logistic and linear model to estimate the effect of exposure to biomass burning on the prevalence of hypertension and blood pressure, respectively. The adjusted odds ratio of hypertension among individuals livi…
Aerosol-modulated heat stress in the present and future climate of India
Heat stress is one of the leading natural causes of mortality in India. Aerosols can potentially impact heat stress by modulating the meteorological conditions via radiative feedback. However, a quantitative understanding of such an impact is lacking. Here, using a chemical transport model, Weather Research Forecasting model coupled with chemistry, we show that high aerosol loading in India was able to mask the heat stress (quantified by the wet …
Cleaner air would enhance India’s annual solar energy production by 6–28 TWh
India has set a target of 100 GW solar installation capacity by the year 2022. However, the loss of solar energy due to environmental factors like air pollution is not properly considered in renewable energy resource assessments. Here we show that India lost 29% of its utilizable global horizontal irradiance potential due to air pollution between 2001 and 2018. The average loss in output incurred by solar power systems with horizontal, fixed-tilt…
Systematizing the approach to air quality measurement and analysis in low and middle income countries
Reducing the burden of anaemia in Indian women of reproductive age with clean-air targets
Modelling ambient PM 2.5 exposure at an ultra-high resolution and associated health burden in megacity Delhi
Deriving hyperlocal information about fine particulate matter (PM 2.5 ) is critical for quantifying exposure disparities and managing air quality at neighborhood scales in cities. Delhi is one of the most polluted megacities in the world, where ground-based monitoring was limited before 2017. Here we estimate ambient PM 2.5 exposure at 100 m × 100 m spatial resolution for the period 2002–2019 using the random forest model. The model-predicted dai…
Atmospheric elemental carbon pollution and its regional health disparities in China
Previous studies have reported that atmospheric elemental carbon (EC) may pose potentially elevated toxicity when compared to total ambient fine particulate matter (PM 2.5 ). However, most research on EC has been conducted in the US and Europe, whereas China experiences significantly higher EC pollution levels. Investigating the health impact of EC exposure in China presents considerable challenges due to the absence of a monitoring network to do…
High ambient air pollution erodes the benefits of using clean cooking fuel in preventing low birth weight in India
A large fraction of the population in rural India continues to use biomass fuel for cooking and heating. In-utero exposure to the resulting household air pollution (HAP), is known to increase the risk of low birth weight (LBW). Mitigating HAP, by shifting to clean cooking fuel (CCF), is expected to minimize the risk associated with LBW. However, India also has high levels of ambient air pollution (AAP). Whether exposure to AAP modifies the effect…
Future photovoltaic potential in India
India has set ambitious solar energy targets to meet its climate commitments. However, climate change, already evident in the country, poses significant challenges to solar power generation. Therefore, assessing the impact of climate change on future photovoltaic potential in India is essential. This study evaluates the mid-century (2041–2050) solar photovoltaic potential across Indian power grids using CMIP6 models under two scenarios: SSP2-4.5 …
Exposure to ambient PM 2.5 and its association with the loss of labor productivity of manufacturing plants in India
Evidence of the impacts of ambient air pollution on health in India has been expanding. However, the economic impact of air pollution has rarely been explored. Here, we examined the impact of exposure to ambient fine particulate matter (PM 2.5 ) derived from satellite data at 1 km × 1 km resolution on the productivity of the manufacturing plants using a micro-level dataset for the period 2008–2009 and 2009–2010 across 465 districts in India. Usin…
The role of antioxidant nutrients in mitigating PM2.5-related health risks in young Indian children
Introduction Pollution (PM 2.5 ) exposure can result in acute respiratory illness (ARI) and anaemia in children. We aimed to investigate if antioxidant nutrient intakes could mitigate the impact of PM 2.5 on child health outcomes on a national scale in India. Methods We triangulated satellite-derived PM 2.5 exposure data at the primary sampling unit level, with ARI and anaemia prevalence data from national district-level survey, and antioxidant n…
A protocol for estimating health burden posed by early life exposure to ambient fine particulate matter and its heavy metal composition
Background: Pregnant women and children are vulnerable to air pollution-related adverse health effects, especially those residing in low-resource and high-exposure settings like India. However, evidence regarding the effects of early-life exposure to air particulate matter (PM) on childhood growth/developmental trajectory is contradictory; evidence about specific constituents of PM, like heavy metals, is limited. Similarly, there are few Indian c…
Higher in-utero exposure to greenspace can reduce the prevalence of low birth weight in India
An emerging body of evidence suggests that exposure to residential greenspace may provide reproductive health benefits to mothers during pregnancy by promoting physical activity and reducing exposure to environmental risks. Here, we addressed this evidence gap in India and assessed the association between residential greenspace and the prevalence of low birth weight (LBW) (birth weight ⩽2500 g) among Indian mothers. We analyzed health and demogra…
Dipole pattern in aerosol-induced atmospheric warming trends over the Indian subcontinent in the last two decades
Understanding the patterns of aerosol-induced perturbation in radiation budget and its drivers is crucial in climate science. Here, we examined spatio-temporal trends in aerosol-induced atmospheric warming and the top-of-the-atmosphere (TOA) and surface cooling over the Indian Subcontinent under clear-sky and all-sky conditions using clouds and the earth’s radiant energy system data for the period 2000–2021. Overall, the regional mean TOA and sur…
A framework for city-specific air quality health index
Air quality index (AQI) is a crucial tool for communicating the health risks of air quality to the public. However, the current AQI in India does not consider the health impacts of exposure to air pollutants, necessitating the development of air quality health index (AQHI). Here, we proposed a framework for developing city-specific AQHI that better reflects local air quality and associated health risks using air pollution and health data from two…
Phase-Resolved Impacts of Daytime, Nighttime, and Compound Heatwaves on Urban Air Quality in Delhi
India’s peak air pollution puzzle
Understanding the interplay of emissions, meteorology, transboundary transport and chemistry is essential to explain India’s persistent air pollution, particularly during the post-monsoon and early winter months when particulate matter (PM2.5) levels peak across the country. This study quantifies the relative contributions of these drivers to population-weighted nationally averaged PM2.5 concentrations and their variability from 2017 to 2021 in t…
Air Quality and Health Impacts (16 obras) · Environmental Science (15 obras) · Geography (15 obras) · Environmental health (13 obras) · Medicine (13 obras) · Air pollution (11 obras) · Meteorology (10 obras) · Energy and Environment Impacts (9 obras) · Particulates (9 obras) · Climate Change and Health Impacts (8 obras)