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Sat Nov 4, 2017, 06:58 PM

Warm Air Helped Make 2017 Ozone Hole Smallest Since 1988

This discussion thread was locked as off-topic by muriel_volestrangler (a host of the Latest Breaking News forum).

Source: NASA

According to NASA, the ozone hole reached its peak extent on Sept. 11, covering an area about two and a half times the size of the United States – 7.6 million square miles in extent - and then declined through the remainder of September and into October. NOAA ground- and balloon-based measurements also showed the least amount of ozone depletion above the continent during the peak of the ozone depletion cycle since 1988. NOAA and NASA collaborate to monitor the growth and recovery of the ozone hole every year.

“The Antarctic ozone hole was exceptionally weak this year,” said Paul A. Newman, chief scientist for Earth Sciences at NASA's Goddard Space Flight Center in Greenbelt, Maryland. “This is what we would expect to see given the weather conditions in the Antarctic stratosphere.”

The smaller ozone hole in 2017 was strongly influenced by an unstable and warmer Antarctic vortex – the stratospheric low pressure system that rotates clockwise in the atmosphere above Antarctica. This helped minimize polar stratospheric cloud formation in the lower stratosphere. The formation and persistence of these clouds are important first steps leading to the chlorine- and bromine-catalyzed reactions that destroy ozone, scientists said. These Antarctic conditions resemble those found in the Arctic, where ozone depletion is much less severe.

In 2016, warmer stratospheric temperatures also constrained the growth of the ozone hole. Last year, the ozone hole reached a maximum 8.9 million square miles, 2 million square miles less than in 2015. The average area of these daily ozone hole maximums observed since 1991 has been roughly 10 million square miles.

Read more: https://www.nasa.gov/feature/goddard/2017/warm-air-helped-make-2017-ozone-hole-smallest-since-1988

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Reply Warm Air Helped Make 2017 Ozone Hole Smallest Since 1988 (Original post)
Calista241 Nov 2017 OP
Squinch Nov 2017 #1
Hortensis Nov 2017 #2
muriel_volestrangler Nov 2017 #3

Response to Calista241 (Original post)

Sat Nov 4, 2017, 07:05 PM

1. So with a smaller ozone hole, will we experience cooling? Please?

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Response to Calista241 (Original post)

Sat Nov 4, 2017, 07:16 PM

2. Well, thanks for some good news, if transient.

One of our grandsons is interested in science, and I've been trying a little bit to nudge him toward climatology, which will be an important and dynamic field for some time to come. Maybe eventually.

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Response to Calista241 (Original post)

Sat Nov 4, 2017, 08:27 PM

3. Locking - duplicate thread, and dated 2nd Nov

Please continue discussion at https://www.democraticunderground.com/10141903979 . Thanks.

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