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Recent Articles
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Topic: Ozone Layer
The annual ozone hole reached its peak extent of 6.3 million square miles (16. 4 million square kilometers) on September 8th, and then shrank to less than 3.9 million square miles (10 million square kilometers) for the remainder of September and October, according to NASA and NOAA satellite measurements. During years with normal weather conditions, the ozone hole typically grows to a maximum area of about 8 million square miles in late September or early October. ![]() The 2019 ozone hole reached its peak extent of 6.3 million square miles (16. 4 million square kilometers) on September 8th. Abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion this year. (NASA) «Read the rest of this article» Sections: Technology | No Comments
NASA observations show 20 percent decrease in Ozone Hole DepletionWritten by Samson Reiny
Measurements show that the decline in chlorine, resulting from an international ban on chlorine-containing human-produce chemicals called chlorofluorocarbons (CFCs), has resulted in about 20 percent less ozone depletion during the Antarctic winter than there was in 2005 — the first year that measurements of chlorine and ozone during the Antarctic winter were made by NASA’s Aura satellite. ![]() Using measurements from NASA’s Aura satellite, scientists studied chlorine within the Antarctic ozone hole over the last several years, watching as the amount slowly decreased. (NASA’s Goddard Space Flight Center/Katy Mersmann) «Read the rest of this article» Sections: Technology | No Comments
NASA’s TSIS-1 instrument to monitor Earth’s Ozone LayerWritten by Rani Gran
Currently, several NASA and National Oceanic and Atmospheric Administration (NOAA) satellites track the amount of ozone in the upper atmosphere and the solar energy that drives the photochemistry that creates and destroys ozone. ![]() TSIS-1 will be affixed to the International Space Station in December 2017 TSIS-1 operates like a sun flower: it follows the Sun, from the ISS sunrise to its sunset, which happens every 90 minutes. At sunset, it rewinds, recalibrates and waits for the next sunset. (NASA/LASP) «Read the rest of this article» Sections: Technology | No Comments
NASA to use Spacecraft Orbiting Earth to track Air PollutionWritten by Steve Cole
We are getting close. Air pollution causes an estimated 152,000 deaths a year across the Americas and more than 2 million deaths in the Western Pacific, according to the United Nations. Some parts of the world have a detailed view of local air quality from ground sensor networks and forecast models that generate public alerts. But for much of the world this type of information and warning are not available. ![]() Satellites have documented that human-produced and natural air pollution can travel a long way. This 2014 NASA satellite image shows a long river of dust from western Africa (bottom of image) push across the Atlantic Ocean. (NASA) «Read the rest of this article» Sections: Technology | No Comments
New NASA Study reveals ozone-depleting compound tetrachloride abundant in Earth’s Ozone LayerWritten by Tony Phillips
It is, essentially, sunscreen for planet Earth. Without the ozone layer, we would be bathed in dangerous radiation on a daily basis, with side effects ranging from cataracts to cancer. People were understandably alarmed, then, in the 1980s when scientists noticed that man made chemicals in the atmosphere were destroying this layer. «Read the rest of this article» Sections: Technology | No Comments
NASA scientists study changes to Earth’s Ozone levelsWritten by Alan Buis
The finding is good news, since human and plant health are harmed by exposure to ozone near the ground. Significant increases in ozone in Earth’s lowest atmospheric layer, the troposphere, would also lead to additional climate warming because ozone is a greenhouse gas. ![]() Astronauts aboard the International Space Station captured this photograph of Earth’s atmospheric layers on July 31, 2011, revealing the troposphere (orange-red) to the stratosphere and above. Earth-observing instruments in space allow scientists to better understand the chemistry and dynamics occurring within and between these layers. (NASA/JSC Gateway to Astronaut Photography of Earth) «Read the rest of this article» Sections: Technology | No Comments
NASA Leads Study of Unprecedented Arctic Ozone LossWritten by Alan Buis
The study, published online Sunday, October 2nd, in the journal Nature, finds the amount of ozone destroyed in the Arctic in 2011 was comparable to that seen in some years in the Antarctic, where an ozone “hole” has formed each spring since the mid-1980s. The stratospheric ozone layer, extending from about 10 to 20 miles (15 to 35 kilometers) above the surface, protects life on Earth from the sun’s harmful ultraviolet rays. ![]() Left: Ozone in Earth's stratosphere at an altitude of approximately 12 miles (20 kilometers) in mid-March 2011, near the peak of the 2011 Arctic ozone loss. Right: chlorine monoxide – the primary agent of chemical ozone destruction in the cold polar lower stratosphere – for the same day and altitude. The white line marks the area within which the chemical ozone destruction took place. (Image credit: NASA/JPL-Caltech) «Read the rest of this article» Sections: News | No Comments
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