NASA probe beams back ultraviolet images of Martian atmosphere

October 18, 2016

Washington, Oct 18: In a first, NASA's MAVEN spacecraft has beamed back ultraviolet images of Mars that unveils dynamic, previously invisible activities in the atmosphere of the red planet such as change in ozone levels over the seasons and formation of clouds.master

The images were taken by the Imaging UltraViolet Spectrograph (IUVS) on the Mars Atmosphere and Volatile Evolution mission (MAVEN) - a space probe designed to study the Martian atmosphere while orbiting Mars.

These were then used to make this movie of rapid cloud formation on Mars on July this year.

The movie uses four MAVEN images to show about seven hours of Mars rotation during this period, and interleaves simulated views that would be seen between the four images.

"MAVEN obtained hundreds of such images in recent months, giving some of the best high-resolution ultraviolet coverage of Mars ever obtained," said Nick Schneider from the University of Colorado, Boulder in the US.

Nightside images show ultraviolet (UV) "nightglow" emission from nitric oxide (NO). Nightglow is a common planetary phenomenon in which the sky faintly glows in the complete absence of external light.

Mars' nightside atmosphere emits light in the ultraviolet due to chemical reactions that start on Mars' dayside.

Ultraviolet light from the Sun breaks down molecules of carbon dioxide and nitrogen, and the resulting atoms are carried around the planet by high-altitude wind patterns that encircle the planet.

On the nightside, these winds bring the atoms down to lower altitudes where nitrogen and oxygen atoms collide to form nitric oxide molecules. The recombination releases extra energy, which comes out as ultraviolet light.

Scientists predicted NO nightglow at Mars, and prior missions detected its presence, but MAVEN has returned the first images of this phenomenon in the Martian atmosphere.

Splotches and streaks appearing in the images occur where NO recombination is enhanced by winds.

Such concentrations are clear evidence of strong irregularities in Mars' high altitude winds and circulation patterns. These winds control how Mars' atmosphere responds to its very strong seasonal cycles.

Dayside images show the atmosphere and surface near Mars' south pole in unprecedented ultraviolet detail. They were obtained as spring comes to the southern hemisphere.

Ozone is destroyed when water vapour is present, so ozone accumulates in the winter polar region where the water vapour has frozen out of the atmosphere.

The images show ozone lasting into spring, indicating that global winds are inhibiting the spread of water vapour from the rest of the planet into winter polar regions.

MAVEN observations also show afternoon cloud formation over the four giant volcanoes on Mars.
Clouds are a key to understanding a planet's energy balance and water vapour inventory, so these observations will be valuable in understanding the daily and seasonal behaviour of the atmosphere, researchers said.

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News Network
March 11,2020

Rome, Mar 11: Italy has recorded its deadliest day of the coronavirus crisis despite locking down the entire country, as New York deployed the National Guard to contain a disease that has sown worldwide panic.

The hardest-hit country in Europe said its death toll from the COVID-19 virus had risen Tuesday by a third to 631, with the surging epidemic taking its toll on global sporting, cultural and political events.

While authorities in China, where the outbreak began, have declared it "basically curbed", cases are multiplying around the world, sparking panic buying in shops, and wild swings on financial markets.

China remains the hardest-hit overall with more than 80,000 cases and over 3,000 deaths, out of a global total of 117,339 cases and 4,251 deaths across 107 countries and territories, according to an AFP tally.

The virus is infecting all walks of life, including politics, with US Democratic presidential hopefuls Bernie Sanders and Joe Biden both cancelling campaign rallies and British health minister Nadine Dorries saying she had tested positive.

And amid criticism of the US authorities' response, New York deployed the National Guard for the first time during the crisis to help contain the spread of the disease from an infection-hit suburb.

There have been 173 confirmed cases in New York state, including 108 in Westchester County, home to New Rochelle where the majority of infections have been detected.

"It is a dramatic action, but it is the largest cluster in the country. This is literally a matter of life and death," said state governor Andrew Cuomo.

"People are scared, it's an unusual situation to be in," Miles Goldberg, who runs a New Rochelle bar, told AFP.

"It makes people nervous to be around others, it makes people nervous to get inside into businesses and such," he said.

In an unprecedented move, Italian Prime Minister Giuseppe Conte has told the 60 million residents of his country they should travel only for the most urgent work or health reasons.

And while squares in Milan and Rome were emptied of their usual bustle and traffic, some residents appeared uncertain if they were even allowed to leave their homes for everyday tasks like shopping.

The virus has battered tourism around the world, as people scrap travel plans, and a restaurant owner in Florence in northern Italy said that the impact on business had been catastrophic.

"We hope that we will see the end of it, because from around 140 covers a day, this afternoon, we've gone down to 20-25," Agostino Ferrara told AFP.

Pope Francis also seemed to muddy the waters, holding a mass in which he urged priests to go out and visit the sick -- something Conte has specifically discouraged.

Sporting events continued to fall victim to the virus as authorities urge people to avoid large gatherings.

Arsenal's game at Manchester City was postponed after players from the London club were put into quarantine, making it the first Premier League fixture to be called off because of the virus.

The virus has sparked doubts about the Olympics due to open in Tokyo on July 24 and the traditional flame lighting ceremony in Greece is set to be held without spectators.

In the United States, organisers rescheduled the two-week Coachella music festival for October.

The virus and the response to the crisis has prompted pandemonium on global markets with volatility not seen since the world financial crisis in 2008.

After suffering its worst session in more than 11 years at the beginning of the week, the Dow Jones Index in New York bounced back significantly, rising five percent on Tuesday.

Politicians around the world have scrambled to put together emergency packages to ease the significant financial hardships the virus is expected to cause for households and businesses.

US President Donald Trump, who is relying on a strong economy to boost his re-election hopes, promised to announce "major" economic measures on Tuesday.

The biggest item on his wish list is a cut in payroll taxes. But even allies in Congress and reportedly some aides in the White House are sceptical, questioning the cost.

Italy prepared Tuesday to let families skip mortgage and some tax payments while Japan unveiled a second emergency package to tackle economic woes stemming from the outbreak, including $15 billion in loan programmes to support small businesses.

Analysts warned of further volatility ahead however.

"It's like winding up a rubber band. The more you wind it, when you let go, the more it pops," said LBBW's Karl Haeling.

"A lot of the uncertainty goes to the root of the virus itself."

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News Network
May 22,2020

May 22: A Pakistan International Airlines (PIA) flight on its way from Lahore to Karachi, crashed in the area near Jinnah International Airport on Friday, according to Civil Aviation Authority officials.

Geo News reported that the plane crashed at the Jinnah Ground area near the airport as it was approaching for landing. There were more than 90 passengers on board the Airbus aircraft. Black smoke could be seen from afar at the crash site, say eye witnesses.

There were no immediate reports on the number of casualties. The aircraft arriving from the eastern city of Lahore was carrying 99 passengers and 8 crew members, news agency AP said, quoting Abdul Sattar Kokhar, spokesman for the country’s civil aviation authority.

Witnesses said the Airbus A320 appeared to attempt to land two or three times before crashing in a residential area near Jinnah International Airport.

Flight PK-303 from Lahore was about to land in Karachi when it crashed at the Jinnah Garden area near Model Colony in Malir, just a minute before its landing, Geo News reported.

Local television reports showed smoke coming from the direction of the airport. Ambulances were on their way to the airport.

News agency said Sindh’s Ministry of Health and Population Welfare has declared emergency in all major hospitals of Karachi due to the plane crash.

It’s the second plane crash for Pakistani carrier in less than four years. The airline’s chairman resigned in late 2016, less than a week after the crash of an ATR-42 aircraft killed 47 people. The incident comes as Pakistan was slowly resuming domestic flights in the wake of the coronavirus pandemic, Bloomberg reported.

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Agencies
July 1,2020

The ILO has warned that if another Covid-19 wave hits in the second half of 2020, there would be global working-hour loss of 11.9 percent - equivalent to the loss of 340 million full-time jobs.

According to the 5th edition of International Labour Organisation (ILO) Monitor: Covid-19 and the world of work, the recovery in the global labour market for the rest of the year will be uncertain and incomplete.

The report said that there was a 14 percent drop in global working hours during the second quarter of 2020, equivalent to the loss of 400 million full-time jobs.

The number of working hours lost across the world in the first half of 2020 was significantly worse than previously estimated. The highly uncertain recovery in the second half of the year will not be enough to go back to pre-pandemic levels even in the best scenario, the agency warned.

The baseline model – which assumes a rebound in economic activity in line with existing forecasts, the lifting of workplace restrictions and a recovery in consumption and investment – projects a decrease in working hours of 4.9 percent (equivalent to 140 million full-time jobs) compared to last quarter of 2019.

It says that in the pessimistic scenario, the situation in the second half of 2020 would remain almost as challenging as in the second quarter.

“Even if one assumes better-tailored policy responses – thanks to the lessons learned throughout the first half of the year – there would still be a global working-hour loss of 11.9 per cent at the end of 2020, or 340 million full-time jobs, relative to the fourth quarter of 2019,” it said.

The pessimistic scenario assumes a second pandemic wave and the return of restrictions that would significantly slow recovery. The optimistic scenario assumes that workers’ activities resume quickly, significantly boosting aggregate demand and job creation. With this exceptionally fast recovery, the global loss of working hours would fall to 1.2 per cent (34 million full-time jobs).

The agency said that under the three possible scenarios for recovery in the next six months, “none” sees the global job situation in better shape than it was before lockdown measures began.

“This is why we talk of an uncertain but incomplete recovery even in the best of scenarios for the second half of this year. So there is not going to be a simple or quick recovery,” ILO Director-General Guy Ryder said.

The new figures reflect the worsening situation in many regions over the past weeks, especially in developing economies. Regionally, working time losses for the second quarter were: Americas (18.3 percent), Europe and Central Asia (13.9 percent), Asia and the Pacific (13.5 percent), Arab States (13.2 percent), and Africa (12.1 percent).

The vast majority of the world’s workers (93 per cent) continue to live in countries with some sort of workplace closures, with the Americas experiencing the greatest restrictions.

During the first quarter of the year, an estimated 5.4 percent of global working hours (equivalent to 155 million full-time jobs) were lost relative to the fourth quarter of 2019. Working- hour losses for the second quarter of 2020 relative to the last quarter of 2019 are estimated to reach 14 per cent worldwide (equivalent to 400 million full-time jobs), with the largest reduction (18.3 per cent) occurring in the Americas.

The ILO Monitor also found that women workers have been disproportionately affected by the pandemic, creating a risk that some of the modest progress on gender equality made in recent decades will be lost, and that work-related gender inequality will be exacerbated.

The severe impact of Covid-19 on women workers relates to their over-representation in some of the economic sectors worst affected by the crisis, such as accommodation, food, sales and manufacturing.

Globally, almost 510 million or 40 percent of all employed women work in the four most affected sectors, compared to 36.6 percent of men, it said.

The report said that women also dominate in the domestic work and health and social care work sectors, where they are at greater risk of losing their income and of infection and transmission and are also less likely to have social protection.

The pre-pandemic unequal distribution of unpaid care work has also worsened during the crisis, exacerbated by the closure of schools and care services.

Even as countries have adopted policy measures with unprecedented speed and scope, the ILO Monitor highlights some key challenges ahead, including finding the right balance and sequencing of health, economic and social and policy interventions to produce optimal sustainable labour market outcomes; implementing and sustaining policy interventions at the necessary scale when resources are likely to be increasingly constrained and protecting and promoting the conditions of vulnerable, disadvantaged and hard-hit groups to make labour markets fairer and more equitable.

“The decisions we adopt now will echo in the years to come and beyond 2030. Although countries are at different stages of the pandemic and a lot has been done, we need to redouble our efforts if we want to come out of this crisis in a better shape than when it started,” Ryder said. 

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