28-05-2012, 11:05 AM
ASIAN BROWN CLOUD
ASIAN BROWN CLOUD.pptx (Size: 1.18 MB / Downloads: 45)
WHAT IS AN ASIAN BROWN CLOUD
Is a layer of air pollution that covers parts of South Asia.(January & March)
Northern Indian ocean, India, Pakistan, Bay of Bengal, Arabian sea, Srilanka & Maldives
Was first coined out by United Nations Environment Programme (UNEP) in Indian Ocean experiment(INDOEX)
Recently has been described as ‘Blanket of pollution’
YOU WOULD BE WONDERING
Is what has been described as a blanket of pollution really a cloud or haze?
Is it a special feature of Asian region?
Will it modify our climate?
Will it have a disastrous impact on agriculture?
Los Angeles
Due to rapid industrialisation after 2nd world war
Caused sever eye irritation & reduced visibility
Death rate increased
Air quality in china
coal is widely used as fuel
Fine particle concentration has an average of 100microgram whereas it was only 22microgram in London
Fine particle concentration of Beijing is 300microgram
In the worst days the fine particle concentration is said to be 1milligram
Why specific to Asian region
The most densely populated regions in the world
Present population density 100-500persons/km
Increase in urban population & rapid deforestation
Increasing tendency of population
Developing countries