Spatial variability in ambient atmospheric fine and coarse mode aerosols over Indo-Gangetic plains, India and adjoining oceans during the onset of summer monsoons, 2014

Sen, Amarnath; Ahammed, Y. Nazeer; Banerjee, Tirthankar; Chatterjee, Abhijit; Choudhuri, Anil K.; Das, Trupti; Deb, N. C.; Dhir, Amit; Goel, Sangita; Khan, Altaf Hussain; Mandal, T. K.; Murari, Vishnu; Pal, Shrimanta; Rao, Pasupuleti Sreenivasa; Saxena, Mohit; Sharma, S.K.; Sharma, Ashima; Vachaspati, C. Viswanatha

doi:10.1016/j.apr.2016.01.001

Cited by 36 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The different sources of air pollution in the DMR are well documented, which include industrial activities, transport, road side construction, and regional emission sources that contribute a significant fraction to aerosol mass loading in the region ( Nagpure et al, 2013 ; Saxena et al, 2014 , 2017 ; Sen et al, 2016 ; Sharma et al, 2016 ). Thus, the almost complete stop in the rush hour traffic and other anthropogenic activities, including industrial and construction, can be considered as the major factors for the substantial decline in levels of particulate matter at the local level.…”

Section: Resultsmentioning

confidence: 99%

Impact of the COVID-19 lockdown on air quality in the Delhi Metropolitan Region

Roy

Balling

2021

Applied Geography

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Impact of the COVID-19 lockdown on air quality in the Delhi Metropolitan Region

Roy

Balling

2021

Applied Geography

View full text Add to dashboard Cite

“…Thus, restricted emission due to lockdown resulted reduction particulate matter concentrations over Delhi. In previous studies, it was well documented that industrial activities, constructions (road side), transportations, emission from the regional sources were the main source of air pollution ( Saxena et al, 2017 ; Sen et al, 2016 ; Sharma et al, 2016 ). Thus, complete shutdown on transportation, industrial activities and other anthropogenic activities caused substantial reduction of particulate matter concentration over Delhi during lockdown periods.…”

Section: Discussionmentioning

confidence: 99%

Exploring short term spatio-temporal pattern of PM2.5 and PM10 and their relationship with meteorological parameters during COVID-19 in Delhi

et al. 2021

View full text Add to dashboard Cite

Present study aims to examine the impact of lockdown on spatio-temporal concentration of PM 2.5 and PM 10 - categorized and recorded based on its levels during pre-lockdown, lockdown and unlock phases while noting the relationship of these levels with meteorological parameters (temperature, wind speed, relative humidity, rainfall, pressure, sun hour and cloud cover) in Delhi. To aid the study, a comparison was made with the last two years (2018 to 2019), covering the same periods of pre-lockdown, lockdown and unlock phases of 2020. Correlation analysis, linear regression (LR) was used to examine the impact of meteorological parameters on particulate matter (PM) concentrations in Delhi, India. The findings showed that (i) substantial decline of PM concentration in Delhi during lockdown period, (ii) there were substantial seasonal variation of particulate matter concentration in city and (iii) meteorological parameters have close associations with PM concentrations. The findings will help planners and policy makers to understand the impact of air pollutants and meteorological parameters on infectious disease and to adopt effective strategies for future.

show abstract

“…The PSCF plot shows a potential origin from the Arabian Sea and indicates possible mixing with dust during the passage of the air masses over the Thar Desert and arid regions in Pakistan (Figure 8) [9]. In general, the influence of marine air masses and such aerosol types at Nainital and the western Himalayas is expected to be very weak [34,45] and, indeed, the factor recorded low contributions to TSP (8-10%), except for summer (17%), when advection of marine aerosols by strong SW winds is favored in the setting of the summer monsoon [91].…”

Section: Source Identification Via Pmf Receptor Modelmentioning

confidence: 99%

Chemical Composition and Source Apportionment of Total Suspended Particulate in the Central Himalayan Region

et al. 2021

View full text Add to dashboard Cite

The present study analyzes data from total suspended particulate (TSP) samples collected during 3 years (2005–2008) at Nainital, central Himalayas, India and analyzed for carbonaceous aerosols (organic carbon (OC) and elemental carbon (EC)) and inorganic species, focusing on the assessment of primary and secondary organic carbon contributions (POC, SOC, respectively) and on source apportionment by positive matrix factorization (PMF). An average TSP concentration of 69.6 ± 51.8 µg m−3 was found, exhibiting a pre-monsoon (March–May) maximum (92.9 ± 48.5 µg m−3) due to dust transport and forest fires and a monsoon (June–August) minimum due to atmospheric washout, while carbonaceous aerosols and inorganic species expressed a similar seasonality. The mean OC/EC ratio (8.0 ± 3.3) and the good correlations between OC, EC, and nss-K+ suggested that biomass burning (BB) was one of the major contributing factors to aerosols in Nainital. Using the EC tracer method, along with several approaches for the determination of the (OC/EC)pri ratio, the estimated SOC component accounted for ~25% (19.3–29.7%). Furthermore, TSP source apportionment via PMF allowed for a better understanding of the aerosol sources in the Central Himalayan region. The key aerosol sources over Nainital were BB (27%), secondary sulfate (20%), secondary nitrate (9%), mineral dust (34%), and long-range transported mixed marine aerosol (10%). The potential source contribution function (PSCF) and concentration weighted trajectory (CWT) analyses were also used to identify the probable regional source areas of resolved aerosol sources. The main source regions for aerosols in Nainital were the plains in northwest India and Pakistan, polluted cities like Delhi, the Thar Desert, and the Arabian Sea area. The outcomes of the present study are expected to elucidate the atmospheric chemistry, emission source origins, and transport pathways of aerosols over the central Himalayan region.

show abstract

Spatial variability in ambient atmospheric fine and coarse mode aerosols over Indo-Gangetic plains, India and adjoining oceans during the onset of summer monsoons, 2014

Cited by 36 publications

References 40 publications

Impact of the COVID-19 lockdown on air quality in the Delhi Metropolitan Region

Impact of the COVID-19 lockdown on air quality in the Delhi Metropolitan Region

Exploring short term spatio-temporal pattern of PM2.5 and PM10 and their relationship with meteorological parameters during COVID-19 in Delhi

Chemical Composition and Source Apportionment of Total Suspended Particulate in the Central Himalayan Region

Contact Info

Product

Resources

About