Booted out of Jet Airways, expat pilots may land at strike-hit Air India

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, Mar 26: Two new COVID-19 positive cases were registered in Rajasthan taking the total number of coronavirus cases to 38 in the state.
The Union Health Ministry had on Wednesday reported 606 positive COVID-19 cases in India including 43 foreign nationals.

With the beginning of Ramzan just about 10 days away, Maulana Khalid Rashid Firangi Mahali, the chairperson of the Islamic Centre of India and the Imam of Aishbagh Eidgah has issued an advisory to people on how to observe Ramzan during the lockdown.

In his appeal, the Sunni cleric, who is a member of the All India Muslim Personal Law Board (AIMPLB), has urged people that the holy month of Ramzan is likely to begin from April 25. The lockdown may also be extended beyond April 14.

"In this case, it is advised that people observe roza (fast) and do iftar (meal to break the fast) in the evenings at their homes. There should be no congregational prayers in the mosque but only at homes. Only those who stay or are staying at a mosque should pray there and that too while maintaining adequate social distance," said Maulana Khalid Rashid Firangi Mahali in a video message.

The cleric, in the 12-point advisory, has asked people to fast as is mandatory in Islam and to pray for the end of the pandemic, during the month of worship.

The advisory says that those who used to arrange for iftar of poor and needy persons at the mosque, should continue to do so this year as well but the food should be distributed to the needy.

"Those who conducted Iftar parties in Ramzan should give the money kept for it in charity. Not more than five people should be present at any time at a mosque," the cleric added.

Earlier for April 8 and April 9, both Shia and Sunni clerics had appealed to the people to stay indoors and pray on the occasion of Shab-e-Baraat, respectively. To ensure full compliance of the lockdown, the gates of several graveyards in the city were locked up by the caretakers since traditionally Muslims visit graves of their ancestors on Shab-e-Baraat--the night of Allah's forgiveness, to pray for their ancestors.