US President Donald Trump has dismissed concerns over the living conditions and mental health of sailors aboard the USS Abraham Lincoln, which has spent more than 260 days at sea amid ongoing US military operations in West Asia. The aircraft carrier's unusually long deployment has raised concerns among sailors' relatives and lawmakers, with reports citing shortages of basic supplies, sanitation issues and mental health challenges. The US Navy says a sailor who fell overboard on August 3 was safely recovered and that no service member aboard the carrier has died. Officials have also disputed reports portraying the crew as victims of deteriorating conditions.

The USS Abraham Lincoln carries roughly 5,000 sailors and Marines. Military experts say extended deployments, combat operations and prolonged periods without port calls can place significant physical and psychological pressure on service members.

Donald Trump Dismisses Concerns Over USS Lincoln Crew Conditions 

Larger and more intense wildfires have a massive impact on the environment as it deteriorates the air quality and leads to pollution in the surrounding regions.&nbsp;

A recent study can explain to what extent the impact of wildfires can be seen. In a study, published in Science Advances, researchers from the University of Colorado Boulder and the National Center for Atmospheric Research (NCAR) found that soot and other burned biomass from wildfires are impacting the Arctic.&nbsp;

Researchers discovered that the wildfires in Colorado and elsewhere in the Northern Hemisphere can eventually make their way to the Arctic. If this becomes prominent, it can lead to ripple effects on climatic patterns for the rest of the globe - a matter of major concern.&nbsp;

ALSO READ |&nbsp;<a href="https://www.wionews.com/science/millions-develop-long-lasting-problems-with-sense-of-smell-or-taste-after-covid-19-study-501475">Millions develop long-lasting problems with sense of smell or taste after COVID-19: Study</a>&nbsp;

Patricia DeRepentigny, the lead author on the paper and a postdoctoral fellow at NCAR, said: "This research found that particles emitted from wildfires where people live can really impact what happens in the Arctic thousands of miles away."&nbsp;

"Sometimes the Arctic can be seen as this region that we shouldn't care about because it's so far away from where we live … but the fact that there's this back-and-forth of what happens here with the wildfires can affect the sea ice, and a diminishing sea ice can then lead to more wildfires here, connects us with the Arctic a little bit more," DeRepentigny added.&nbsp;

DeRepentigny and her team studied a recent model - the NCAR-based Community Earth System Model version 2 (CESM2). They noticed that the Arctic sea lost ice drastically towards the end of the 20th century. The previous models didn't highlight it, hence, the researchers decided to probe it further.&nbsp;

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After the due analysis, they found that the biomass burning emissions had the biggest effect on Arctic sea ice loss when simulated. They compared the forcings between the new and previous generations of climate models. Forcings are the different ways a climate model can be influenced, such as carbon dioxide or methane emissions or solar radiation.&nbsp; 
&nbsp; 
As mentioned in the study, the researchers found that the main difference is due to the non-linear cloud effects that can emerge when aerosols, small particles or liquid droplets, released by fires interact with Arctic clouds.&nbsp;

Wildfires impact on health

Wildfires also lead to several health issues such as exposure to smoke for a prolonged period of time can cause eye and respiratory tract irritation. There's a risk of serious disorders, such as reduced lung function, bronchitis, exacerbation of asthma and heart failure.&nbsp;

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Larger and more intense wildfires have a massive impact on the environment as it deteriorates the air quality and leads to pollution in the surrounding regions. A recent study can explain to what extent the impact of wildfires can be seen.

Larger and more intense wildfires have a massive impact on the environment as it deteriorates the air quality and leads to pollution in the surrounding regions. A recent study can explain to what extent the impact of wildfires can be seen. In a study, published in Science Advances, researchers from the University of Colorado Boulder and the National Center for Atmospheric Research (NCAR) found that soot and other burned biomass from wildfires are impacting the Arctic. Researchers discovered that the wildfires in Colorado and elsewhere in the Northern Hemisphere can eventually make their way to the Arctic. If this becomes prominent, it can lead to ripple effects on climatic patterns for the rest of the globe - a matter of major concern. ALSO READ | Millions develop long-lasting problems with sense of smell or taste after COVID-19: Study Patricia DeRepentigny, the lead author on the paper and a postdoctoral fellow at NCAR, said: "This research found that particles emitted from wildfires where people live can really impact what happens in the Arctic thousands of miles away." "Sometimes the Arctic can be seen as this region that we shouldn't care about because it's so far away from where we live … but the fact that there's this back-and-forth of what happens here with the wildfires can affect the sea ice, and a diminishing sea ice can then lead to more wildfires here, connects us with the Arctic a little bit more," DeRepentigny added. DeRepentigny and her team studied a recent model - the NCAR-based Community Earth System Model version 2 (CESM2). They noticed that the Arctic sea lost ice drastically towards the end of the 20th century. The previous models didn't highlight it, hence, the researchers decided to probe it further. ALSO READ | Wuhan puts one district under lockdown after detecting four COVID-19 cases After the due analysis, they found that the biomass burning emissions had the biggest effect on Arctic sea ice loss when simulated. They compared the forcings between the new and previous generations of climate models. Forcings are the different ways a climate model can be influenced, such as carbon dioxide or methane emissions or solar radiation. As mentioned in the study, the researchers found that the main difference is due to the non-linear cloud effects that can emerge when aerosols, small particles or liquid droplets, released by fires interact with Arctic clouds. Wildfires impact on health Wildfires also lead to several health issues such as exposure to smoke for a prolonged period of time can cause eye and respiratory tract irritation. There's a risk of serious disorders, such as reduced lung function, bronchitis, exacerbation of asthma and heart failure. WATCH WION LIVE HERE You can now write for wionews.com and be a part of the community. Share your stories and opinions with us here.

Soot and other burned biomass from Western wildfires can influence Arctic sea ice

Along the frosty coast of Hudson Bay, hundreds of polar bears have been wandering for weeks, waiting for the wintertime sea ice to form so they can return to hunting ringed seals. Until then, they represent a danger to the 900 people living in nearby Churchill - a remote, sub-Arctic town in Canada famous for the visiting carnivores. The town is working on a plan to prevent conflicts between hungry bears and humans, using a new radar system that can watch and warn when a bear approaches and do so in a snowstorm and during the dead of night.

Bear-spotting radar tracks polar bears migrating to the Arctic sea ice

The arctic ice cover is disappearing and within decades there could be no ice covering the arctic during the summer months. Scientists are racing against time to save and protest the fragile arctic ecosystem.

Can we save the arctic from destruction? Scientists race to save arctic ecosystem | WION News

US scientists have offered yet another stark evidence of the impact of global warming on the planet. They on Monday announced and explained how the Arctic summer sea ice melted in 2020 to the second smallest size since records began 42 years ago.

Arctic sea ice melts in summer and reforms in winter, but precise satellite imagery taken regularly since 1979 documented how the cycle has been shrinking significantly.

According to preliminary data from scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder, the year's minimum was reached on September 15, at 3.74 million square kilometers (1.44 million square miles).

Only once before, in 2012, did the sea ice melt further.

Unlike melting glaciers on land, melting sea ice does not directly contribute to rising sea levels as the ice is already on the water, but less ice means less solar radiation is reflected and more is absorbed by the oceans.

The evidence of shrinking ice coverage -- in both thickness and area -- in the Arctic and Antarctic is stacking up, though pace varies from one region to another.

Antarctic ice melted quickly for three years in a row until 2017, but more recently it has bounced back without a clear explanation. In the Arctic, the reduction has been on a more pronounced downward trend since 1996 in comparison to the previous period.

US scientists have offered yet another stark evidence of the impact of global warming on the planet. They on Monday announced and explained how the Arctic summer sea ice melted in 2020 to the second smallest size since records began 42 years ago.

US scientists have offered yet another stark evidence of the impact of global warming on the planet. They on Monday announced and explained how the Arctic summer sea ice melted in 2020 to the second smallest size since records began 42 years ago. Arctic sea ice melts in summer and reforms in winter, but precise satellite imagery taken regularly since 1979 documented how the cycle has been shrinking significantly. According to preliminary data from scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder, the year's minimum was reached on September 15, at 3.74 million square kilometers (1.44 million square miles). Only once before, in 2012, did the sea ice melt further. Unlike melting glaciers on land, melting sea ice does not directly contribute to rising sea levels as the ice is already on the water, but less ice means less solar radiation is reflected and more is absorbed by the oceans. The evidence of shrinking ice coverage -- in both thickness and area -- in the Arctic and Antarctic is stacking up, though pace varies from one region to another. Antarctic ice melted quickly for three years in a row until 2017, but more recently it has bounced back without a clear explanation. In the Arctic, the reduction has been on a more pronounced downward trend since 1996 in comparison to the previous period.

Warmer temperatures shrink Arctic sea ice to second lowest-level ever

Arctic sea ice is likely to vanish during summers even if all the nations that have signed the Paris Agreement accord meet their targets, a study has said.

Almost 200 nations that signed the Paris climate accord have pledged to limit average global temperature rise to less than 2 degrees Celsius (3.6 Fahrenheit); they aspire to keep the rise to less than 1.5C (2.7F).

James Screen and Daniel Williamson of Exeter University in Britain wrote in the journal Nature Climate Change that Arctic sea ice would melt during summertime even if the rise is limited to 2C.

They said there was a 39&nbsp;per cent chance of Arctic sea ice melting if the rise in average global temperature was limited to just 2 degrees Celsius.

Ice was virtually certain to survive, however, with just 1.5C of warming.

In March 2017, the extent of Arctic sea ice is rivalling 2016 and 2015 as the smallest for the time of year since satellite records began in the late 1970s. The ice reaches a winter maximum in March and a summer minimum in September.

&quot;In less than 40 years, we have almost halved the summer sea ice cover,&quot; said Tor Eldevik a professor at the Bjerknes Centre for Climate Research at the University of Bergen in Norway, who was not involved in the study.

He predicted that sea ice would vanish in the Arctic Ocean in about another 40 years, on current trends.

Scientists define an ice-free Arctic Ocean as one with less than 1 million square kilometres (386,000 square miles) of ice because they say some sea ice will linger in bays, such as off northern Greenland, even after the ocean is ice-free.

US President Donald Trump said during his 2016 election campaign that he would &quot;cancel&quot; the Paris Agreement and instead promote the domestic fossil fuel industry. He has since said he has an &quot;open mind&quot; on the subject.

(WION with inputs from Reuters)

&nbsp;

A Nature Climate Change report said there was a 39% chance of the ice melting

Arctic sea ice is likely to vanish during summers even if all the nations that have signed the Paris Agreement accord meet their targets, a study has said. Almost 200 nations that signed the Paris climate accord have pledged to limit average global temperature rise to less than 2 degrees Celsius (3.6 Fahrenheit); they aspire to keep the rise to less than 1.5C (2.7F). James Screen and Daniel Williamson of Exeter University in Britain wrote in the journal Nature Climate Change that Arctic sea ice would melt during summertime even if the rise is limited to 2C. They said there was a 39 per cent chance of Arctic sea ice melting if the rise in average global temperature was limited to just 2 degrees Celsius. Ice was virtually certain to survive, however, with just 1.5C of warming. In March 2017, the extent of Arctic sea ice is rivalling 2016 and 2015 as the smallest for the time of year since satellite records began in the late 1970s. The ice reaches a winter maximum in March and a summer minimum in September. "In less than 40 years, we have almost halved the summer sea ice cover," said Tor Eldevik a professor at the Bjerknes Centre for Climate Research at the University of Bergen in Norway, who was not involved in the study. He predicted that sea ice would vanish in the Arctic Ocean in about another 40 years, on current trends. Scientists define an ice-free Arctic Ocean as one with less than 1 million square kilometres (386,000 square miles) of ice because they say some sea ice will linger in bays, such as off northern Greenland, even after the ocean is ice-free. US President Donald Trump said during his 2016 election campaign that he would "cancel" the Paris Agreement and instead promote the domestic fossil fuel industry. He has since said he has an "open mind" on the subject. (WION with inputs from Reuters)

Arctic sea ice likely to vanish in summers even if Paris accord target met: Study

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