Sentences with phrase «ozone loss»

«The models show this magnitude of ozone loss would persist for five years, and we would see substantial losses continuing for at least another five years,» he said.

Very large ozone losses have been observed there recently, especially in 1997.

This makes it difficult to separate chemical ozone loss from natural changes induced by transport.

Can we say it's probable that the following year's observation of increased ozone loss confirmed that, or is there enough signal to say?

Even following a very cold winter, if temperatures warm quickly during spring very little ozone loss may take place.

There is a complex relationship between ozone loss and climate change.

But they were brief and did not lead to major ozone loss.

It takes prolonged cold temperatures in the winter and spring stratosphere to maximize ozone losses.

So far the degree of Arctic ozone loss in winter 2004/2005 is very similar to the previous record loss in the Arctic, that occurred during winter 1999/2000.

for article Stratospheric ozone loss over the Eurasian continent induced by the polar vortex shift.

At present, naturally - emitted VSLS account for around 90 % of the total ozone loss caused by VSLS in the lower stratosphere.

The study, led by Simone Tilmes of the National Center for Atmospheric Research (NCAR) in Boulder, Colo., warns that such an approach would delay the recovery of the Antarctic ozone hole by decades and cause significant ozone loss over the Arctic.»

A paper on the subject, titled «Massive Global Ozone Loss Predicted Following A Regional Nuclear Conflict,» appeared the week of April 7 in the Proceedings of the National Academy of Sciences.

Lu's predictions for increased polar ozone loss in 2008/2009 as a function of the low solar activity (and therefore higher CR flux) did not come to pass.

Although the vortex broke down around mid-March of that winter, ozone loss continued in a stable remnant and by early April about 70 % of the ozone at 20 km was destroyed in this fragment of the vortex.

Colder temperatures and weaker high - altitude winds may make the arctic polar vortex even more intense in future winters and trigger greater ozone loss, says atmospheric scientist Paul Newman of NASA's Goddard Space Flight Center in Greenbelt, Maryland, although the losses probably won't approach those in Antarctica.

Figure 2: Total column ozone loss relative to pre-ozone hole conditions in the 1970s in percent (left) and total number of molecules (right)(1 DU = 2.69 molecules / cm2) averaged over 2010 - 2019, during September for the Southern Hemisphere and March for the Northern Hemisphere.

But it is important to put the measured ozone losses at individual layers into some perspective: 19 - 20 km altitude is where the maximum ozone concentration is normally reached over the Arctic.

In mid-March, Rex and other researchers from Europe, Russia and North America warned that, despite a successful international plan to ban the use of ozone - depleting substances, the Arctic could be facing unprecedented ozone loss this spring.

«By adopting the Montreal Protocol in 1987, society demonstrated it was unwilling to tolerate a small percentage of ozone loss because of serious health risks,» said Toon.

In 2016, their analyses suggest, about 3 % of the summer ozone loss in the Antarctic could be traced to CH2Cl2.

To determine whether declining pollutants deserve credit for the recovery, the researchers used a 3D atmospheric model to separate the effects of the chemicals from those of weather, which can affect ozone loss through winds and temperature, and volcanic eruptions, which deplete ozone by pumping sulfate particles into the upper atmosphere.

But the Arctic has yet to suffer the deep, widespread and sustained ozone loss seen each year over Antarctica.

Some degree of ozone loss above the Arctic, and the formation of the Antarctic ozone hole, are annual events during the poles» respective winters.

The press release was entitled, «Huge 2004 stratospheric ozone loss tied to solar storms, Arctic winds».

To my narrow way of thinking, this of course * was * a huge (as poorly quantified as that is) stratospheric ozone loss â??

The study is titled «Massive Global Ozone Loss Predicted Following A Regional Nuclear Conflict» and it was published in the Proceedings of the National Academy of Sciences (April 7th issue):

«The big surprise is that this study demonstrates that a small - scale, regional nuclear conflict is capable of triggering ozone losses even larger than losses that were predicted following a full - scale nuclear war.»