Arkansas did almost everything it needed to beat Alabama, but a valiant effort was just a bit shy. Please enter an email address. Something went wrong. Arkansas-Kansas State basketball: How to watch, stream, listen. Previous image Next image. The team found that the September ozone hole has shrunk by more than 4 million square kilometers — about half the area of the contiguous United States — since , when ozone depletion was at its peak.
The team also showed for the first time that this recovery has slowed somewhat at times, due to the effects of volcanic eruptions from year to year. Overall, however, the ozone hole appears to be on a healing path. These chemical compounds were once emitted by dry cleaning processes, old refrigerators, and aerosols such as hairspray. In , virtually every country in the world signed on to the Montreal Protocol in a concerted effort to ban the use of CFCs and repair the ozone hole.
The ozone hole was first discovered using ground-based data that began in the s. Around the mids, scientists from the British Antarctic survey noticed that the October total ozone was dropping. From then on, scientists worldwide typically tracked ozone depletion using October measurements of Antarctic ozone. Ozone is sensitive not just to chlorine, but also to temperature and sunlight.
Chlorine eats away at ozone, but only if light is present and if the atmosphere is cold enough to create polar stratospheric clouds on which chlorine chemistry can occur — a relationship that Solomon was first to characterize in Measurements have shown that ozone depletion starts each year in late August, as Antarctica emerges from its dark winter, and the hole is fully formed by early October.
The team showed that as the chlorine has decreased, the rate at which the hole opens up in September has slowed down. September is a better time to look because chlorine chemistry is firmly in control of the rate at which the hole forms at that time of year.
The researchers tracked the yearly opening of the Antarctic ozone hole in the month of September, from to They analyzed ozone measurements taken from weather balloons and satellites, as well as satellite measurements of sulfur dioxide emitted by volcanoes, which can also enhance ozone depletion.
And, they tracked meteorological changes, such as temperature and wind, which can shift the ozone hole back and forth. They then compared their yearly September ozone measurements with model simulations that predict ozone levels based on the amount of chlorine that scientists have estimated to be present in the atmosphere from year to year. The researchers found that the ozone hole has declined compared to its peak size in , shrinking by more than 4 million square kilometers by The team did observe an important outlier in the trend: In , the ozone hole reached a record size, despite the fact that atmospheric chlorine continued to drop.
January 8, October 19, April 17, February 23, November 21, October 14, February 13, July 16, May 6, March 29, May 3, January 14, March 6, April 12, January 6, January 11, January 13, January 20, January 27, February 3, February 10, February 17, February 24, March 3, March 10, March 17, March 24, March 31, April 7, April 13, April 21, April 28, May 5, May 12, May 19, May 26, June 2, June 9, June 16, June 23, June 30, July 7, July 14, July 21, July 28, August 4, August 11, August 18, August 25, September 1, September 8, September 15, September 22, September 29, October 6, October 13, October 20, October 27, November 3, November 10, November 17, November 24, December 1, December 8, December 15, December 22, January 5, January 12, January 19, January 26, February 2, February 9, February 16, March 2, March 9, March 16, March 23, March 30, April 5, April 20, April 27, May 4, May 11, May 18, June 1, June 8, June 15, June 22, June 29, July 6, July 13, July 20, As you might guess, I have a lot of different interests, among them being travel, the outdoors, and architecture—which was why I had a great time writing my newest romantic contemporary novel, Provenance!
In it, I got to explore arts and crafts architecture and interior design, as well as depict a fictional version of one of my favorite small Colorado towns. Los Angeles interior designer Kendall Green has pushed her memories of her childhood into the past—abandoned at the age of five, she never truly knew her mother or why she was left behind. She just knows that no good came from dwelling on her painful history. The best and easiest option is to sell the property and fly home as quickly as possible.
But when she arrives in the small town of Jasper Lake, she realizes that plan might not be quite so easy. The town is filled with people who knew her family—and this might be her only chance to find out the truth of her past. The truth is slowly revealed, bringing with it awareness of her own hurts and the need for forgiveness and reconciliation in her life.
Learn more about the book here , or find out more details about me by following me on Facebook , Instagram , or BookBub! But wait!
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