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
February 2,2020

Feb 2: The Philippines on Sunday reported the first death from a new virus outside of China, where authorities delayed the opening of schools in the worst-hit province and tightened quarantine measures in a city that allow only one family member to venture out to buy supplies.

The Philippine Department of Health said a 44-year-old Chinese man from Wuhan was admitted on Jan. 25 after experiencing a fever, cough, and sore throat. He developed severe pneumonia, and in his last few days, “the patient was stable and showed signs of improvement, however, the condition of the patient deteriorated within his last 24 hours resulting in his demise.”

The man’s 38-year-old female companion, also from Wuhan, also tested positive for the virus and remains in hospital isolation in Manila.

President Rodrigo Duterte approved a temporary ban on all travelers, except Filipinos, from China and its autonomous regions. The U.S., Japan, Singapore and Australia have imposed similar restrictions despite criticism from China and an assessment from the World Health Organization that they were unnecessarily hurting trade and travel.

The death toll in China climbed by 45 to 304 and the number of cases by 2,590 to 14,380, according to the National Health Commission, well above the number of those infected in in the 2002-03 outbreak of SARS, or severe acute respiratory syndrome, which broke out in southern China and spread worldwide.

Meanwhile, six officials in the city of Huanggang, neighboring the epicenter of Wuhan in Hubei province, have been fired over “poor performance” in handling the outbreak, the official Xinhua News Agency reported.

It cited the mayor as saying the city’s “capabilities to treat the patients remained inadequate and there is a severe shortage in medical supplies such as protective suits and medical masks.”

After Huanggang, the trading center of Wenzhou in coastal Zhejiang province also confined people to homes, allowing only one family member to venture out every other day to buy necessary supplies.

With the outbreak showing little sign of abating, authorities in Hubei and elsewhere have extended the Lunar New Year holiday, due to end this week, well into February. The annual travel crunch of millions of people returning from their hometowns to the cities is thought to pose a major threat of secondary infection at a time when authorities are encouraging people to avoid public gatherings.

All Hubei schools will postpone the opening of the new semester until further notice and students from elsewhere who visited over the holiday will also be excused from classes.

Far away on China’s southeast coast, the manufacturing hub of Wenzhou put off the opening of government offices until Feb. 9, private businesses until Feb. 17 and schools until March 1.

With nearly 10 million people, Wenzhou has reported 241 confirmed cases of the virus, one of the highest levels outside Hubei. Similar measures have been announced in the provinces and cities of Heilongjiang, Shandong, Guizhou, Hebei and Hunan, while the major cities of Shanghai and Beijing were on indefinite leave pending developments.

Despite imposing drastic travel restrictions at home, China has chafed at those imposed by foreign governments, criticizing Washington’s order barring entry to most non-citizens who visited China in the past two weeks. Apart from dinging China’s international reputation, such steps could worsen a domestic economy already growing at its lowest rate in decades.

The crisis is the latest to confront Chinese leader Xi Jinping, who has been beset by months of anti-government protests in the semi-autonomous Chinese city of Hong Kong, the reelection of Taiwan’s pro-independence president and criticism over human rights violations in the traditionally Muslim northwestern territory of Xinjiang. Economically, Xi faces lagging demand and dramatically slower growth at home while the tariff war with the U.S. remains largely unresolved.

Among a growing number of airlines suspending flights to mainland China was Qatar Airways. The Doha-based carrier said on its website that its flights would stop Monday. It blamed “significant operational challenges caused by entry restrictions imposed by a number of countries” for the suspension of flights.

Oman also halted flights to China, as did Saudi Arabia’s flagship national carrier, Saudia.

Saudi Arabia’s state-run TV reported that 10 Saudi students were evacuated from Wuhan on a special flight. It said the students would be screened upon arrival, but did not say whether they would be quarantined for 14 days.

This weekend, South Korea and India flew hundreds of their citizens out of Wuhan. They went into a two-week quarantine.

On Sunday, South Korea reported three more cases for a total of 15. They include an evacuee, a Chinese relative of a man who tested positive and a man who returned from Wuhan. India reported a second case, also in southern Kerala state.

South Korea also barred foreigners who have stayed or traveled to Hubei province within the last 14 days from entering the country.

Indonesia flew back 241 nationals from Wuhan on Sunday and quarantined them on the remote Natuna Islands for two weeks. Several hundred residents protested the move, with one saying, “This is not because we do not have a sense of solidarity with fellow nationals. But because we fear they could infect us with the deadly virus from China.”

A Turkish military transport plane carrying 42 people arrived in Ankara from Wutan Saturday night. The 32 Turkish, six Azerbaijani, three Georgian nationals and an Albanian will remain under observation for 14 days, together with 20 personnel who participated in the evacuation, Health Minister Fahrettin Koca said.

Vietnam counted its seventh case, a Vietnamese-American man who had a two-hour layover in Wuhan on his way from the U.S. to Ho Chi Minh City.

The virus’ rapid spread in two months prompted the WHO on Thursday to declare it a global emergency.

That declaration “flipped the switch” from a cautious attitude to recommending governments prepare for the possibility the virus might spread, said the WHO representative in Beijing, Gauden Galea. Most cases reported so far have been people who visited China or their family members.

WHO said it was especially concerned that some cases abroad involved human-to-human transmission.

“Countries need to get ready for possible importation in order to identify cases as early as possible and in order to be ready for a domestic outbreak control, if that happens,” Galea told The Associated Press.

Both the new virus and SARS are from the coronavirus family, which also includes those that cause the common cold.

The death rate in China is falling, but the number of confirmed cases will keep growing because thousands of specimens from suspected cases have yet to be tested, Galea said.

“The case fatality ratio is settling out at a much lower level than we were reporting three, now four, weeks ago,” he said.

Although scientists expect to see limited transmission of the virus between people with family or other close contact, they are concerned about cases of infection spreading to people who might have less exposure.

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Agencies
April 20,2020

Hong Kong, Apr 20: Oil prices collapsed to more than two-decade lows Monday as traders grow concerned that storage facilities are reaching their limits, while equities were mixed, with some support coming from signs that the coronavirus may have peaked in Europe and the United States.

US crude benchmark West Texas Intermediate briefly plunged almost 20 percent to below 15 -- its lowest since 1999 -- as stockpiles continue to build owing to a crash in demand caused by the COVID-19 pandemic.

Analysts said this month's agreement between top producers to slash output by 10 million barrels a day was having little impact on the oil crisis because of lockdowns and travel restrictions that are keeping billions of people at home.

WTI was hit particularly hard as its main US storage facilities in Cushing, Oklahoma, were filling up.

ANZ said "crude oil prices remained under pressure, as projections of weaker demand weigh on sentiment".

"Despite the OPEC+ alliance agreeing to an unprecedented cut in output, the physical market is awash with oil," it said, referring to the Organization of the Petroleum Exporting Countries and non-OPEC partners.

And AxiCorp's Stephen Innes added: "It's a dump at all cost as no one... wants delivery of oil, with Cushing storage facilities filling by the minute.

"It hasn't taken long for the market to recognise that the OPEC+ deal will not, in its present form, be enough to balance oil markets." Stock traders were in slightly more buoyant mood as governments start to consider how and when to ease lockdowns that have crippled the global economy.

Italy, Spain, France and Britain reported drops in daily death tolls and slowing infection rates.

"We are scoring points against the epidemic," said Prime Minister Edouard Philippe, while insisting "we are not out of the health crisis yet".

Meanwhile, in the US, Andrew Cuomo, governor of badly hit New York state, said the disease was "on the descent", though he cautioned it was "no time to get cocky".

Mounting evidence suggests that the lockdowns and social distancing are slowing the spread of the virus.

That has intensified planning in many countries to begin loosening curbs on movement and easing the crushing pressure on national economies.

Adding to the sense of hope was a report indicating promising research on a drug to treat coronavirus.

Hong Kong, Shanghai and Seoul were each up 0.1 percent, while Wellington added 0.4 percent.

However, Tokyo went into the break 0.9 percent lower, while Sydney and Manila dropped one percent apiece. There were also losses in Taipei, Singapore and Jakarta.

"The longer investors have to contemplate future economic issues while they wait for more countries to be on the downward slope of the pandemic curve, the more scope there is of risk assets pricing in a difficult future," Chris Iggo, of AXA Investment Managers UK, said.

Investors are keeping an eye on Washington, where Congress and the White House are working towards a 450 billion economic relief plan for small business to add to the trillions already pledged to support the economy.

Big-name companies including IBM, Netflix and Coca-Cola are due to deliver their earnings reports.

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News Network
April 18,2020

Washington, Apr 18: The United States on Friday passed 700,000 confirmed coronavirus cases, according to a tally maintained by Johns Hopkins University.

With the highest number of cases and deaths of any country in the world, the US had recorded 700,282 cases of COVID-19 and 36,773 deaths as of 8:30 pm (0030 GMT Friday), according to the Baltimore-based university.

That marked an increase of 3,856 deaths in the past 24 hours, but that figure likely includes "probable" virus-linked deaths, which had not previously been counted.

This week, New York City said it would add 3,778 "probable" virus deaths to its official count.

The US Centers for Disease Control and Prevention gave a toll Friday night of 33,049 dead, including 4,226 probable virus-linked deaths.

The United States has seen the highest death toll in the world in the coronavirus pandemic, ahead of Italy (22,745 deaths) although its population is just a fifth of that of the US.

Spain has recorded 19,478 deaths, followed by France with 18,681.

Trump announces $19 billion relief for farmers amid COVID-19 epidemic

President Donald Trump on Friday announced a $19 billion financial rescue package to help the agriculture industry weather the staggering economic downturn sparked by measures to defeat the coronavirus.

Trump told a press conference the government "will be implementing a $19 billion relief program for our great farmers and ranchers as they cope with the fallout of the global pandemic."

The program will include direct payments to farmers, ranchers and producers who Trump said have experienced "unprecedented losses during this pandemic."

Agriculture Secretary Sonny Perdue said US farmers have been hit hard by a sharp shift in demand, as schools and restaurants close and more Americans eat at home.

That has disrupted the food supply chain, forcing farmers in many places to destroy dairy output and plow under crops that no longer have buyers.

"Having to dump milk and plow under vegetables ready to market is not only financially distressing, but it's heartbreaking as well to those who produce them," Perdue said.

Perdue said some $3 billion of the money would go to buying produce and milk from such farmers, and redistribute it to community food banks.

Millions of Americans have recently turned to food pantries for meals and groceries after losing their jobs.

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