Clouds do prevent radars from detecting accurately: Air Marshal Raghunath Nambiar

Washington, Apr 23: Air pollution over northern India has plummeted to a 20-year-low for this time of the year, according to satellite data published by US space agency National Aeronautics and Space Administration (NASA).
The US space agency's satellite sensors observed aerosol levels at a 20-year low post the countrywide lockdown, implemented to slow the spread of the novel coronavirus.

"We knew we would see changes in atmospheric composition in many places during the lockdown," said Pawan Gupta, a Universities Space Research Association (USRA) scientist at NASA''s Marshall Space Flight Center. "But I have never seen aerosol values so low in the Indo-Gangetic Plain at this time of year," added Mr Gupta.

Acting Assistant Secretary of State for South and Central Asia Alice G Wells tweeted, "These images from NASA were taken each spring starting in 2016 and show a 20-year low in airborne particle levels over India. When India and the world are ready to work and travel again, let's not forget that collaborative action can result in cleaner air."

The data published with maps show aerosol optical depth (AOD) in 2020 compared to the average for 2016-2019. Aerosol optical depth is a measure of how light is absorbed or reflected by airborne particles as it travels through the atmosphere.

If aerosols are concentrated near the surface, an optical depth of 1 or above indicates very hazy conditions. An optical depth, or thickness, of less than 0.1 over the entire atmospheric vertical column is considered "clean." The data were retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite.

In the first few days of the lockdown, it was difficult to observe a change in the pollution signature. "We saw an aerosol decrease in the first week of the shutdown, but that was due to a combination of rain and the lockdown," said Mr Gupta.

Around March 27, heavy rain poured over vast areas of northern India and helped clear the air of aerosols. Aerosol concentrations usually increase again after such heavy precipitation.

"After the rainfall, I was really impressed that aerosol levels did not go up and return to normal. We saw a gradual decrease and things have been staying at the level we might expect without anthropogenic emissions," Mr Gupta said.

On March 25, the Indian government placed its 1.3 billion citizens under a strict lockdown to reduce the spread of COVID-19. The countrywide mandate decreased activity at factories and severely reduced car, bus, truck and airplane traffic. Every year, aerosols from anthropogenic (human-made) sources contribute to unhealthy levels of air pollution in many Indian cities.

Aerosols are tiny solid and liquid particles suspended in the air that reduce visibility and can damage the human lungs and heart.

In southern India though, the story is a little hazier. Satellite data show aerosol levels have not yet decreased to the same extent. In fact, levels seem to be slightly higher than in the past four years. The reasons are unclear but could be related to recent weather patterns, agricultural fires, winds or other factors.

"This a model scientific experiment," Robert Levy, program leader for NASA's MODIS aerosol products, said about the lockdown and its effects on pollution.

"We have a unique opportunity to learn how the atmosphere reacts to sharp and sudden reductions in emissions from certain sectors. This can help us separate how natural and human sources of aerosols affect the atmosphere," Mr Levy added.

Jaipur, Jul 20: In a startling revelation, Rajasthan Congress MLA Giriraj Singh Malinga has claimed that rebel leader Sachin Pilot offered him Rs 35 crore to switch to the BJP but he refused. 

Speaking to the media in Rajasthan capital Jaipur, Malinga, who represents Bari constituency, said he had informed Chief Minister Ashok Gehlot about Pilot’s “offer”.

“I, too, had offers but I refused. I had spoken to Sachin ji, he asked me to switch sides and I refused. This is a wrong thing, I will not do it for money,” Malinga said.

“I said that when we left Bahujan (BSP, in 2008), where one has to give money to get a ticket, whereas in Congress and BJP, that is not the system. I was offered a lot of money. Sachin Pilot had said money is not an issue, you ask what you want and you will get… Rs 35 crore or more, but I said it is wrong,” he added.

Malinga said he had had the conversation with Pilot 2-3 times, first in December during the panchayat delimitation, and later before the Rajya Sabha elections last month.

He added that the BJP had never reached out to him, and neither had he spoken to them. “I have no animosity with Pilot but I am speaking the truth,” he said.

The state plunged into a political crisis after former deputy chief minister Sachin Pilot declared rebellion on 12 July, claiming to have the support of 30 MLAs. By the next day, however, he could not prove the support of more than 18 legislators.

On 14 July, 19 MLAs, including Pilot, were served notices by Speaker C.P. Joshi, who asked them to respond by Friday after a petition filed by the chief whip of Congress sought their disqualification from the state assembly. The party also sacked Pilot and two Rajasthan cabinet ministers from their respective posts the same day.

New Delhi, Jan 22: The BJP on Wednesday cited statements of several opposition leaders to accuse them of "abusing" Hindus for their appeasement politics and referred to the Congress as "Muslim League Congress".

Seeking apologies from Congress president Sonia Gandhi and NCP chief Sharad Pawar, BJP spokesperson Sambit Patra said leaders of these parties have used the ongoing protests against the amended citizenship law to "abuse" Hindus.

Chavan has said in a public meeting that the Congress decided to join hands with the Shiv Sena to form government in Maharashtra as Muslims wanted the party to stop the BJP, Patra stated, claiming that it shows the opposition party has nothing to do with people belonging to other religions, including Hindus.

Patra also referred to a statement from an NCP leader to attack the opposition.

Asked about Congress leader Mallikarjun Kharge's reported jibe at the RSS for its "non-participation" in the freedom movement, the BJP leader shot back, asking if parents of Sonia Gandhi, who is of Italian origin, had fought in India's independence struggle.

The Indian National Congress, he said referring to the opposition party's full name, should be called "Muslim League Congress".