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.
Comments
Who is RAMA ?
Answer : he the king of ayodhya.
is he human being
Answer : yes.
how come an human being can become GOD.
my dear hindu brother, please understant the concept of GOD,
rama cannot save sita from kidnapping then how he will save you??
rama need army to capture ravana then how he will become GOD.
Rama born and died, so you think GOD also born & die.
if there is so many gods then there is no justic...same as indian political party one want to pull the leg of other to get power..
Who is GOD ?
The Most Concise Definition of God:
The most concise definition of God in Islam is given in the four verses of Surah Ikhlas which is Chapter 112 of the Qur’an:
"Say: He is Allah,
The One and Only.
"Allah, the Eternal, Absolute.
"He begets not, nor is He begotten.
And there is none like unto Him."
What does Islam say about ‘god-men’?
India is often called the land of ‘god-men’. This is due to the abundance of so-called spiritual masters in India. Many of these ‘babas’ and ‘saints’ have a large following in many countries. Islam abhors deification of any human being. To understand the Islamic stand towards such pretenders to divinity, let us analyze one such ‘god-man’, Osho Rajneesh or RAMA.
Let us put this candidate, ‘Bhagwan’ Rajneesh, to the test of Surah Ikhlas, the touchstone of theology:
i) The first criterion is "Say, He is Allah, one and only". Is Rajneesh one and only? No! Rajneesh was one among the multitude of ‘spiritual teachers’ produced by India. Some disciples of Rajneesh might still hold that Rajneesh is one and only.
ii) The second criterion is, ‘Allah is absolute and eternal’. We know from Rajneesh’s biography that he was suffering from diabetes, asthma, and chronic backache. He alleged that the U.S. Government gave him slow poison in prison. Imagine Almighty God being poisoned! Rajneesh was thus, neither absolute nor eternal.
iii) The third criterion is ‘He begets not, nor is He begotten’. We know that Rajneesh was born in Jabalpur in India and had a mother as well as a father who later became his disciples.
God does not become a human being:
God does not take human form:
Some may argue that God does not become a human being but only takes a human form. If God only takes a human form but does not become a human being, He should not possess any human qualities. We know that all the ‘God-men’, have human qualities and failings. They have all the human needs such as the need to eat, sleep, etc.
The worship of God in human form is therefore a logical fallacy and should be abhorred in all its forms and manifestations.
That is the reason why the Qur’an speaks against all forms of anthropomorphism. The Glorious Qur’an says in the following verse:
"There is nothing whatever like unto Him."
GOD is beautiful, GOD is Merciful, GOD is Loving his creation based on his good deeds.
GOD want human being to live in this earth happly and cooperate each other in bad time.
one important thing GOD want that he want him to worship alone. he is supreme
dont add idol, photo, animal, stone, humans, sun, star etc.
all belong to HIM.
hope you will find the truth before you die!!!
Dear Advocate Sir,
Saying is not enough sir, All courts need concrete evedence to prove and to discharge the verdict.
Please provide the concrete evidence to get the verdict in favor.
We ask advocate Vaidyanathan to respect his post and constitution by not giving incorrect statement. We ask him the base he say that babri masjid was constructed by razing temple. Where is the proof. He is throwing ball in darkness. He is betraying his oath taken while receiving lawyer certificate that he will say truth only. Dear Vaidyanathan, please dont misguide the court and show the evidence. How about the home you are staying. What will be your response if I say that it was constructed demolishing church or gurudwara or masjid.
Add new comment