Sentences with phrase «ozone levels near»

The process can reverse at night, meaning ozone levels near the surface often vary greatly during a single day.

Not exact matches

Ozone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burOzone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burning.

Moreover, in the extreme cold of the upper troposphere, ozone's radiation - trapping properties are thirty times greater than at ground level, says Colin Johnson at AEA Technology near Oxford.

The hole in the ozone layer over the Antarctic has expanded to near - record levels, scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA) said Thursday.

The hole in the ozone layer over Antarctica has expanded to near - record levels, scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA) said Thursday.

A new study has revealed that ozone levels in the heavily populated lower latitudes don't seem to be recovering as well as regions near the poles.

Warming must occur below the tropopause to increase the net LW flux out of the tropopause to balance the tropopause - level forcing; there is some feedback at that point as the stratosphere is «forced» by the fraction of that increase which it absorbs, and a fraction of that is transfered back to the tropopause level — for an optically thick stratosphere that could be significant, but I think it may be minor for the Earth as it is (while CO2 optical thickness of the stratosphere alone is large near the center of the band, most of the wavelengths in which the stratosphere is not transparent have a more moderate optical thickness on the order of 1 (mainly from stratospheric water vapor; stratospheric ozone makes a contribution over a narrow wavelength band, reaching somewhat larger optical thickness than stratospheric water vapor)(in the limit of an optically thin stratosphere at most wavelengths where the stratosphere is not transparent, changes in the net flux out of the stratosphere caused by stratospheric warming or cooling will tend to be evenly split between upward at TOA and downward at the tropopause; with greater optically thickness over a larger fraction of optically - significant wavelengths, the distribution of warming or cooling within the stratosphere will affect how such a change is distributed, and it would even be possible for stratospheric adjustment to have opposite effects on the downward flux at the tropopause and the upward flux at TOA).

Hotter summers and more frequent fires will lead to more cases of heat stroke and deaths, and to higher levels of near - surface ozone and smoke, which would cause more «code red» air quality days.

I see from Joanna Haigh's work that ozone reactions do seem to be at the heart of it and in particular the region at 45Km near the top of the stratosphere where there appears to be an unexpected disjunction between the ozone reactions above and below that level.

«We're reducing emissions at the same time, but tightening the current ozone standard to near unachievable levels would serve as a self - inflicted wound to the U.S. economy at the worst possible time.

But the EPA finding was overturned in Federal court, the ozone hole won't be disappearing anytime in the near future, and even with the unrefuted rise in CO2 levels, skeptic climate scientists point out in vast detail how surface temperatures haven't significantly warmed for around two decades.