Trends in background air pollution parameters over India

Datar, S. V.; Mukhopadhyay, Biswajit; Srivastava, H. N.

doi:10.1016/1352-2310(96)00052-0

Cited by 13 publications

(7 citation statements)

References 5 publications

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“…Due to insufficient background information on PM 10 , understanding its behavior and the relationship with other environmental variables would assist policy makers to define more realistic control strategies in the future. In the initial stage, an investigation of the relations between the pollutant concentrations with some key meteorological factors would be the first diagnostic step as it is widely known that the weather conditions strongly affect the air pollution levels in an urban environment (Kallos et al, 1993;McGregor, 1996;Incecik, 1996;Datar et al, 1996;Cheng and Lam, 1998). The present study aims to reveal the general behavior of PM 10 concentration and to relate its variation with the seasonal changes of the local climate so that typical weather types, which may bring upon Macau heavy PM 10 pollution, are identified.…”

Section: Introductionmentioning

confidence: 99%

Effects of meteorological conditions on PM10 concentrations - A study in Macau

Mok

Hoi

2005

Environ Monit Assess

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Review on the annual PM10 concentrations over a 10-year period shows that Macau is subjected to severe fine particulate pollution. Investigations of its variation in monthly and daily time scales with the local meteorological records reveal further details. It is found that a distinct feature of the Asian monsoon climates, the changes of wind direction, mainly controls the general trend of PM10 concentration in a year. The monsoon driven winter north-easterly winds bring upon Macau dry and particle enriched air masses leading to a higher concentration in that period while the summer south-westerly winds transport humid and cleaner air to the region leading to a lower PM10 value. This distinct seasonal feature is further enhanced by the lower rainfall volume and frequency as well as mixing height in winter and their higher counterparts in summer. It is also found that the development of tropical cyclones near Macau could also impose episode like PM10 concentration spikes due to the pre-typhoon induced stagnant air motion followed by the swing of wind direction to the northerly.

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Section: Introductionmentioning

confidence: 99%

Effects of meteorological conditions on PM10 concentrations - A study in Macau

Mok

Hoi

2005

Environ Monit Assess

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“…A large number of local networks are operated in several countries, which address specific scientific questions, abatement strategies and pollution issues. In various countries like Europe, North America regional networks are functioning and documenting spatial and long term trends in deposition of acidic materials [17].…”

Section: Introductionmentioning

confidence: 99%

Study of Physicochemical Parameters of Rainwater: A Case Study of Karachi, Pakistan

Chughtai¹,

Mustafa²,

Mumtaz³

2014

AJAC

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“…During 1970During -1990, in India, the regions with lower pH values of rainwater have been increasing gradually but AR has still not been considered a threat in the country (Sridharan and Saksena 1990). Datar et al (1996) assessed the annual precipitation volume-weighted means of monthly collected rainwater samples from 10 Background Air Pollution Monitoring Network (BAPMoN) stations between 1973 and 1990. The study revealed that the pH of rainwater is decreasing in almost all stations but reductions in mean values were not significant (Datar et al 1996) (Table 5).…”

Section: The Trend Of Acid Rain Scenariomentioning

confidence: 99%

Global Trends of Acidity in Rainfall and Its Impact on Plants and Soil

Prakash

Agrawal

2022

J Soil Sci Plant Nutr

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Due to its deleterious and large-scale effects on the ecosystem and long-range transboundary nature, acid rain has attracted the attention of scientists and policymakers. Acid rain (AR) is a prominent environmental issue that has emerged in the last hundred years. AR refers to any form of precipitation leading to a reduction in pH to less than 5.6. The prime reasons for AR formation encompass the occurrence of sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), ozone (O 3 ), and organic acids in air produced by natural as well as anthropogenic activities. India, the top SO 2 emitter, also shows a continuous increase in NO 2 level responsible for AR formation. The plants being immobile unavoidably get exposed to AR which impacts the natural surrounding negatively. Plants get affected directly by AR due to reductions in growth, productivity, and yield by damaging photosynthetic mechanisms and reproductive organs or indirectly by affecting underground components such as soil and root system. Genes that play important role in plant defense under abiotic stress gets also modulated in response to acid rain. AR induces soil acidification, and disturbs the balance of carbon and nitrogen metabolism, litter properties, and microbial and enzymatic activities. This article overviews the factors contributing to AR, and outlines the past and present trends of rainwater pH across the world, and its effects on plants and soil systems.

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Trends in background air pollution parameters over India

Cited by 13 publications

References 5 publications

Effects of meteorological conditions on PM10 concentrations - A study in Macau

Effects of meteorological conditions on PM10 concentrations - A study in Macau

Study of Physicochemical Parameters of Rainwater: A Case Study of Karachi, Pakistan

Global Trends of Acidity in Rainfall and Its Impact on Plants and Soil

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