As People Stay Home, Air Pollution In North India At 20-Year Low: NASA

News Network
April 23, 2020

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.

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News Network
April 27,2020

New Delhi, Apr 27: The number of COVID-19 cases climbed to 28,380 and the death toll due to it rose to 886 in the country on Monday, registering a record increase of 60 deaths in 24 hours, according to the Union Health Ministry.

There has been a spike of 1,463 cases since Sunday evening.

The number of active COVID-19 cases stood at 21,132, while 6,361 people have recovered, and one patient has migrated, the ministry said.

Thus, around 22.41 per cent of patients have recovered in the country so far.

The total number of cases includes 111 foreign nationals.

A total of 60 deaths were reported since Sunday evening, of which 19 fatalities were reported from Maharashtra, 18 from Gujarat, eight from Rajasthan, seven from Madhya Pradesh, two each from Karnataka, West Bengal and Uttar Pradesh, and one each from Punjab and Tamil Nadu.

Of the 886 deaths, Maharashtra tops the tally with 342 fatalities, followed by Gujarat at 151, Madhya Pradesh at 106, Delhi at 54, Rajasthan at 41, and Andhra Pradesh and Uttar Pradesh at 31 each.

The death toll reached 26 in Telangana, 24 in Tamil Nadu while West Bengal and Karnataka have reported 20 deaths each.

Punjab has registered 18 fatalities so far. The disease has claimed six lives in Jammu and Kashmir, four in Kerala while Jharkhand and Haryana have recorded three COVID-19 deaths each.

Bihar has reported two deaths, while Meghalaya, Himachal Pradesh, Odisha and Assam have reported one fatality each, according to the ministry data.

According to the Health Ministry data updated in the evening, the highest number of confirmed cases in the country are from Maharashtra at 8,068, followed by Gujarat at 3,301, Delhi at 2,918, Rajasthan at 2,185, Madhya Pradesh at 2,168, Uttar Pradesh at 1,955 and Tamil Nadu at 1,885.

The number of COVID-19 cases has gone up to 1,177 in Andhra Pradesh and 1,002 in Telangana.

The number of cases has risen to 649 in West Bengal, 523 in Jammu and Kashmir, 511 in Karnataka, 469 in Kerala, 313 in Punjab and 289 in Haryana.

Bihar has reported 277 novel coronavirus cases, while Odisha has 108 cases. Eighty-two people have been infected with the virus in Jharkhand and 51 in Uttarakhand.

Himachal Pradesh has 40 cases, Chhattisgarh has 37 and Assam has registered 36 infections each so far.

Andaman and Nicobar Islands has 33 COVID-19 cases while Chandigarh has 30 cases and Ladakh has reported 20 infections so far.

Meghalaya has reported 12 cases, Puducherry has eight cases while Goa has seven COVID-19 cases.

Manipur and Tripura have two cases each, while Mizoram and Arunachal Pradesh have reported a case each.

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Agencies
February 4,2020

The government suspended all the India-bound air travel from China and has declared all visas 'invalid', on Monday, due to the rapid escalation of cases of novel coronavirus outbreak which originated in Wuhan.

"Embassy and our Consulates have been receiving several queries from Chinese citizens as well as other foreign nationals, who are based out of China or visited China in the last 2 weeks, as to whether they can use their valid single/multiple entry visas to travel to India," tweeted the Embassy of India in Beijing, China.

"It is clarified that existing visas are no longer valid. Intending visitors to India should contact the Indian Embassy in Beijing ([email protected]) or the Consulates in Shanghai ([email protected]) and Guangzhou ([email protected]) to apply afresh for an Indian visa," it said.

Further, regarding the validity of visas, the embassy said, "Indian Visa Application Centres (http://blsindia-china.com) in these cities may also be contacted in this regard. Visa Section of the Embassy/Consulates of India in China can be contacted to ascertain the validity of visa before undertaking any visit to India."

"All those who are already in India (with regular or e-visa) and had traveled from China after January 15 are requested to contact the hotline number of Ministry of Health and Family Welfare of Government of India (+91-11-23978046 and email: [email protected])," the embassy said.

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Agencies
February 27,2020

Bengaluru, Feb 27: Defence Minister Rajnath Singh on Thursday said that the situation is moving towards normalcy in Delhi after recent incidents of violence.

"Situation is moving towards normalcy," Rajnath told media here.

Joint Commissioner of Police (Traffic) Narendra Singh Bundela on Thursday said that the law and order and traffic situation in violence-affected parts of Delhi is normal.

"The situation is quite normal and peaceful as far as security and traffic are concerned. We have held talks and conducted patrols with people of all communities. Services such as road cleaning have resumed and traffic flow is normal," Bundela told ANI here.

"People can go out to get their daily needs from the market but we are advising them not to come out in groups," he added.

Meanwhile, the death toll in the incidents of violence in North-East Delhi has risen to 34.

Delhi Police has registered 18 FIRs and 106 people have been arrested in connection with the violence.

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