Scientist warns of sudden heavy rain in Bangalore due to global warming – The New Indian Express

Express press service

BENGALURU: Large tracts of land, mainly in the IT hub of Bangalore, have been flooded following unprecedented torrential rains since September 4.

Unlike in the past, the precipitation pattern is observed to have changed – from an occasional drizzle and downpour to a sudden heavy downpour.

There are increasing instances of heavy and incessant rain causing lakes to overflow, flood and waterlog, which have baffled meteorologists and city planners.

Although there is a lack of detailed research corroborating the link between climate change and the monsoon, meteorologist and professor at the Center for Atmospheric and Oceanic Sciences and president of the Divecha Center for Climate Change, IIISc, SK Satheesh said that extreme weather events like heavy rain over a short period could be due to a “gradual increase in the number of cloud condensation nuclei (aerosols) in the atmosphere and global warming”.

Atmospheric aerosols are known to play a crucial role in cloud formation processes by acting as cloud condensation nuclei (CCNs). They define the size distribution of the droplets forming the rain pattern.

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For a given amount of water vapor content in the atmosphere, fewer large cloud droplets will form if there are fewer aerosols.

For the same amount of water vapour, a large number of smaller cloud droplets will form when the number of aerosols is high, which in polluted conditions can result in heavy precipitation in a short time.

Speaking to TNIE, the scientist said that “The aerosol load in India has been increasing over the past 10 years due to anthropogenic activities. There is an increase of 2% per year in the aerosol load in India. “atmosphere of the Indian subcontinent. This could be due to anthropocentric activities associated with unsustainable planning and urbanization of the landscape, etc.,” the meteorologist said.

Satheesh warned: “The increase in the number of aerosols in the atmosphere will not only change the rainfall pattern, it will also have a negative impact on public health, leading to an increase in the number of people suffering from respiratory disorders. , blocking solar radiation hitting the earth, thereby affecting climate and agriculture, by default,” Satheesh added.

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“The presence of a large number of aerosols in the atmosphere will also impact satellite remote sensing of the Earth’s surface,” he added.

Satheesh said while there are enough policies for pollution control and regulation of construction activities, enforcement is a problem.

“Research should provide a scientific basis for governments at all levels to develop climate-related policies. Linking disaster management with artificial intelligence (AI) is another aspect, which needs special attention with a changing climate,” said the famous scientist.

BENGALURU: Large tracts of land, mainly in the IT hub of Bangalore, have been flooded following unprecedented torrential rains since September 4. Unlike in the past, we observe that the precipitation pattern has changed: from an occasional drizzle and downpour to a sudden heavy downpour now. There are increasing instances of heavy and incessant rain causing lakes to overflow, flood and waterlog, which have baffled meteorologists and city planners. Although there is a lack of detailed research corroborating the link between climate change and the monsoon, meteorologist and professor at the Center for Atmospheric and Oceanic Sciences and president of the Divecha Center for Climate Change, IIISc, SK Satheesh said that extreme weather events like heavy rain over a short period could be due to a “gradual increase in the number of cloud condensation nuclei (aerosols) in the atmosphere and global warming”. Atmospheric aerosols are known to play a crucial role in cloud formation processes by acting as cloud condensation nuclei (CCNs). They define the size distribution of the droplets forming the rain pattern. READ ALSO | Trending #LeaveBengaluru amid man-made tragedy For a given amount of water vapor in the atmosphere, fewer large cloud droplets will form if there are fewer aerosols. For the same amount of water vapour, a large number of smaller cloud droplets will form when the number of aerosols is high, which in polluted conditions can result in heavy precipitation in a short time. Speaking to TNIE, the scientist said that “The aerosol load in India has been increasing over the past 10 years due to anthropogenic activities. There is an increase of 2% per year in the aerosol load in India. atmosphere of the Indian subcontinent. This could be due to anthropocentric activities associated with unsustainable planning and urbanization of the landscape, etc., “said the meteorologist. Satheesh warned: “The increase in the number of aerosols in the atmosphere will not only change the precipitation pattern, it will also have a negative impact on public health, leading to an increase in the number of people suffering from respiratory disorders, blocking solar radiation hitting the earth, thus affecting the climate and agriculture, by default,” Satheesh added. will also impact satellite remote sensing of the Earth’s surface,” he added. Satheesh said while there are enough policies for pollution control and regulation of construction activities, enforcement is a problem. “Research should provide a scientific basis for governments at all levels to develop climate-related policies. Linking disaster management with artificial intelligence (AI) is another aspect, which needs special attention with a changing climate,” said the famous scientist.

Teresa H. Sadler