Yutu-2 rover reawakens after midday nap to continue Chang'e-4 objectives
Science with Jonathan Webb: Ocean temperature is warming faster than we thought
Astronomers observe white dwarf stars solidifying into crystals
Eclipse Season 2019 Kicks Off With Partial Solar Eclipse Today
New NASA Data Suggests The Hole In The Ozone Layer Is Shrinking
06 January 2018, 04:40 | Ross Houston
Ozone layer of the atmosphere is recovering
The hole in the ozone layer has shrunk thanks to low levels of chlorine in the stratosphere - a drop brought about by the ban on CFCs, according to the latest NASA research. Ozone protects life by absorbing potentially harmful ultraviolet radiation that can cause skin cancer and cataracts, suppress immune systems and damage plant life.
CFCs, which were used in aerosols, fridges, air conditioning and packing materials, are so harmful because they rise into the stratosphere, where they are broken apart by the Sun's ultraviolet radiation, releasing chlorine atoms that destroy ozone molecules.
The ozone layer hole was first discovered in 1980s and soon enough, the whole world joined in to solve the problem. The Montreal Protocol was a global promise made in 1989 by industrial countries to sharply curb the use of CFCs, and it looks like the Earth is finally beginning to fix the damage we wrought.
Fast forward to 2018, and NASA has now deemed the treaty a success in staving off the demise of the ozone layer.
Strahan's study is the first to look directly at measurements of chemicals to argue that the shrinking hole stems from the ban of CFCs.
Spotify sued for $2b in copyright infringement lawsuit
His latest album ÷ ( Divide ) has been streamed more than 3.1bn times, making it the platform's most popular album of 2017. It has more than 140m active users, over 60m of which are paying subscribers, and an estimated worth of $19bn.
Using a special instrument designed by scientists at NASA's Jet Propulsion Laboratory in California, the agency's Aura satellite has measured declines in the concentration of ozone-killing chlorine. Chlorine is hard to measure, but when it's run out of ozone to eat, chlorine molecules react with methane to form hydrochloric acid, which is easier to measure.
Former Secretary of State John Kerry gestures as he delivers a speech during the 28th Meeting of the Parties to the Montreal Protocol in Kigali, Rwanda on October 14, 2016. By measuring hydrochloric acid levels each fall, scientists were able to gauge the amounts of chlorine in the ozone hole. These readings suggest that the ban on CFCs has resulted in about 20 percent less ozone depletion during the Antarctic winter than there was in 2005. Comparing hydrochloric acid levels with nitrous oxide levels-another gas that remains in the atmosphere-they determined chlorine's decline of 0.8 percent per year. The abrupt discontinuity in the 2017 plot is due to the orientation of the ozone hole rotating as the satellite gathered its data over the full 24 hour period.
"This is very close to what our model predicts we should see for this amount of chlorine decline. And even then, there might still be a small hole".
"As far as the ozone hole being gone, we're looking at 2060 or 2080", Douglass said in a statement.
In 1987 - two years after the discovery of a hole in the ozone layer above the Antarctic - the nations of the world banded together to sign the Montreal Protocol, which regulated ozone-depleting compounds and resulted in the complete phasing out of CFC production.
Mad Catz Is Returning This Year
Lastly, the F.R.E.Q. 4 gaming headset implements high-quality 40mm neodymium drivers and includes a metal plated. Now, just in time for the Consumer Electronics Show 2018 next week, Mad Catz is back from the dead.
Sensex ends 150 points higher
The Nifty50 index was trading 46 points up at 10,551, while 30-shares Sensex was 173 points up at 34,143 around 10.35 am (IST). Yes Bank (+2.7), Adani Ports (+2.2%), Vedanta (+1.7%), Tata Steel (+1.6%) and Eicher (+1.4%) were the top gainers on Nifty50.
Bieber museum exhibit to open in Ontario hometown
If you'd like to see the exhibit, you'll have a lot of opportunity, because there is now no closing date for Steps to Stardom . Certain artifacts will be switched out for new ones as the exhibit continues.
LiAngelo, LaMelo, LaVar Ball introduced by Prienu Vytautas
The brothers, along with father LaVar, arrived in the eastern European country on Wednesday to a large throng of Lithuanian media. Anyway, if you follow the Balls, you know that the two youngest - LaMelo and LiAngelo - are off to play basketball in Lithuania.