Sentences with phrase «drop in ozone»

«We would see a dramatic drop in ozone levels that would persist for many years,» said Mills of CU - Boulder's Laboratory for Atmospheric and Space Physics.

Isn't this what some researchers are now saying was responsible for the sudden drop in ozone?

Not exact matches

Although ozone pollution is dropping across many parts of the United States, western Europe and Japan, many people living in those countries still experience more than a dozen days every year in which levels of the lung irritant exceed health - based standards.

The team did observe an important outlier in the trend: In 2015, the ozone hole reached a record size, despite the fact that atmospheric chlorine continued to droin the trend: In 2015, the ozone hole reached a record size, despite the fact that atmospheric chlorine continued to droIn 2015, the ozone hole reached a record size, despite the fact that atmospheric chlorine continued to drop.

Ozone production rates dropped by up to 50 percent in six years, Cohan and his colleagues found in a follow - up study (pdf).

A Northwestern University study by an economist and a chemist reports that when fuel prices drove residents of São Paulo, Brazil, to mostly switch from ethanol to gasoline in their flexible - fuel vehicles, local ozone levels dropped 20 percent.

But as water vapor becomes present in the atmosphere, ozone levels drop.

Scientists use the word hole as a metaphor for the area in which ozone concentrations drop below the historical threshold of 220 Dobson Units.

What they found was a drop in Escaping Infra Red radiation at the PRECISE wavelength bands that greenhouse gases such as CO2 with H2O, CFC's, Ozone, Nitrous Oxides, & methane (CH4) absorb energy.

No, the drop in lower stratosphere ozone content since the late 70s is well - correlated with the large volcanic eruptions of El Chichón (1982) and Pinatubo (1991):

The amount of ozone - depleters in the atmosphere has dropped by more than 10 percent since peaking in the late 1990s.

Because that's where the ozone hole is, they suspected that the drop in CFCs might correspond to a thickening of ozone, but until now, couldn't prove it.

A drop in the concentration of ozone in the lower stratosphere should also produce a net cooling at the surface.

EPA data shows ground - level ozone in the U.S. dropped 18 percent between 2000 and 2013.

«Thanks in part to the increased use of domestic natural gas, ozone concentrations in the air have dropped by 17 percent since 2000, all of which makes the United States not just an energy superpower, but also a leader in reducing global emissions.