Ozone layer keeps thinning out despite decades of protection
07 February, 2018, 02:06 | Author: Tracy Craig
The study was published on Tuesday in the journal Atmospheric Chemistry and Physics.external link It found that the ozone layer is continuing to decline on a global scale despite decades of worldwide efforts to protect it. Scientists demonstrated this using satellite measurements spanning the past 30 years combined with advanced statistical methods.
It is clear from Antarctic data that the ozone layer is beginning to recover where it was worst affected, though it will take many more decades before it is back to its condition of the 1970s.
The new study showed that despite the ban on chlorofluorocarbons (CFCs), the concentration of ozone in the lower part of the stratosphere (15 to 24 km) - where the ozone layer is at its densest - has continued to decline. Since the 1970s, global ozone has been deteriorating, due to man-made chemicals.
The ozone layer, which protects life on earth from harmful ultra-violet radiation, continues to deplete on a global scale contrary to recent scientific assumptions, say an worldwide team of scientists led by researchers in Zurich. Although the global ban on CFCs has healed the ozone at the poles, it has not been able to heal layer at the lower latitudes. The cause is now unknown.
"Thanks to the Montreal Protocol, ozone in the upper stratosphere - i.e above 30 Kilometres- has increased significantly since 1998, and the stratosphere is also recovering above the polar regions", said William Ball, researcher at ETH Zurich.
Ozone layer continues to DECLINE in areas of the world, scientists find – and believe it's down to climate change
But boffins discovered ozone, a substance that absorbs UV radiation from the sun, is not healing at lower latitudes between 60N and 60S. Overall, the effects balance out but this means the ozone layer over the area studied is remaining in its depleted state. "The decreases in ozone are less than we saw at the poles before the Montreal Protocol was enacted, but UV radiation is more intense in these regions".
THE ozone layer is continuing to decline in certain areas of the world, scientists have found. Climate change has been affecting the atmospheric circulation pattern which carried out ozone from the tropic. One suggestion by the authors of the paper include the use of chlorine and bromine-containing chemicals known as very short-lived substances (VSLSs), used in paint strippers and solvents. The scientists were somewhat surprised that the ozone is thinning out in the lower stratosphere because their models do not show this trend and CFCs continue to decline. "The impact of the Protocol is undisputed, as evidenced by the trend reversal in the upper stratosphere and at the poles", said Thomas Peter, from ETH Zurich. One is even used in the production of an ozone-friendly replacement for CFCs. "These short-lived substances could be an insufficiently considered factor in the models", said Ball. Now, the researchers hope to gather more precise data on the decline of the ozone layer and work out the cause.
"The study is in lower to mid latitudes, where the sunshine is more intense, so that is not a good signal for skin cancer", said Joanna Haigh at Imperial College London, a member of the worldwide research team, per The Guardian.
The study was the work of researchers from Switzerland, the United Kingdom, the U.S., Sweden, Canada and Finland, and included data from satellite missions, including by NASA.
She goes on to thank Drake and OVO for noticing her hard work, before signing off with the very on-brand quote of " God's Plan ". Lucky student Destiny Paris James was presented with a huge check toward her tuition as she is studying Biology/Pre-Dentistry.
It's not until Timberlake heads into a rustic tavern and hits the dance floor, however, that we finally get a clear look at Biel. A reporter from Boston, Mass. asked Timberlake who he would cheer for, and Timberlake responded, "Go, Pack, Go".
About 40,000 women die of breast cancer every year in the US , according to the Centers for Disease Control and Prevention . And she said that doctors routinely test the tumors of patients to assess the cancer's risk of recurrence.
By 12:40, seconds after the Finance Minister uttered Long Term Capital Gains Tax in the Parliament, the enthusiasm was skittled. The upward revision to the fiscal deficit target to 3.3 percent from 3 percent for 2018-2019 also dampened sentiment.
Any adjustment to the ticket purchased at Reed's Ferry Market in Merrimack would invalidate it, the lottery commission claims. The victor of the $560 million Powerball jackpot last month is suing the New Hampshire Lottery Commission.
The last time the couple was pictured together looking like they were able to tolerate each other was on New Year's Eve. Another pointed out that Melania often wears her coat over her shoulders, which could be the reason behind the fumble.
Menzies-Boule said that the flu season is far from over "and we usually see a second wave of the flu caused by the B strain". It is also important for family members and people who have regular contact with high-risk individuals to be vaccinated.
Taiwan lies along the famed "Pacific Rim of Fire" known for seismic activity from Alaska to Southeast Asia. Multiple, strong aftershocks rattled the area, keeping residents and emergency officials on edge.
Top-diplomat also said: "Trump's obduracy in killing the JCPOA ( Iran's nuclear deal with world powers) stems from unsafe imprudence".
WH: Trump Not Focused on Wall Street
Trump boasted the rise of the stock market both on Twitter and in his recent State of the Union address. It marked a huge upswing after Monday's historic 1,175-point loss.
Yellen to join Brookings Institution after leaving Fed
Fed Chair Janet Yellen said Wells Fargo will not be allowed to grow any larger until it can do so without endangering customers. In his remarks, Powell praised Yellen as the most qualified person to hold the job of Fed chair in the central bank's history.
Proteas women suffer defeat in first ODI
But with the World Cup in England and how pitches are playing nowadays, there is need to groom another spinner . Wicketkeeper batsman, Quinton de Kock , has now also been ruled out of the limited overs series.