Sentences with phrase «stratospheric ozone»

The process of stratospheric ozone depletion begins when CFC's and other ozone depleting chemicals (ODC) are emitted into the atmosphere (EPA, 2010).

Record cold temperatures in the Arctic stratospheric ozone layer, 15 to 35 kilometers up, are the proximate cause for this year's losses, because they help to unleash ozone - destroying chemicals.

A further consideration is changes in stratospheric ozone in the tropics.

«The complete mechanism for Arctic stratospheric ozone modulation of tropical SST still deserves thorough analysis... It is one subject of our next study,» said Li.

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

Perlwitz J., S. Pawson, R. L. Fogt, J. E. Nielsen and W. Neff (April 2008): Impact of stratospheric ozone hole recovery on Antarctic climate.

We talk about the new paper «Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery» as published February 6, 2018.

But Nature reported last year about a puzzling inconsistency discovered in the established chemical model of stratospheric ozone destruction.

A new thesis is proposed for stratospheric ozone formed in situ at higher latitudes.

And recognizing that developed and developing countries had differing legitimate concerns, the international ozone agreements called for developed countries to take the lead in addressing the issue, because these nations had produced most of the substances implicated in destroying stratospheric ozone.

Only through additional study and incorporation in improved models will we accurately predict how the interplay of the multitude of factors affecting stratospheric ozone layer will respond to declines in chlorine and bromine.

We determine its likely evolution for three intergovernmental panel on climate change (IPCC) special report on emission scenarios (SRES) for austral summer and winter, using a multi-model ensemble of IPCC fourth assessment report models which resolve stratospheric ozone recovery.

The recorded maps, however, are reliable evidence supporting the thesis of paramagnetic oxygen transport to high - latitude conversion into stratospheric ozone, and the detailed MLS data may be obtained from NASA.

The Montreal Protocol on Substances That Deplete the Ozone Layer, which has resulted in the phasing out of chlorofluorocarbons (CFCs), a group of industrial compounds that react with and disassociate ozone molecules, is a collective adaptive response by humans to a perceived and predicted threat to life from stratospheric ozone depletion.

He received the 2005 Stratospheric Ozone Protection Award from the U.S. Environmental Protection Agency, has been honored by being selected a Fellow of two major professional science societies.

For instance, it is known that North Pacific SST variations lead the ENSO by about 12 months; even combined with the one month lag - time between Arctic stratospheric ozone variations and North Pacific SST variations, this can not explain the 20 - month lead time of ASO to ENSO.

The controversial theory that these high - energy particles drive the chemical reactions eating away at stratospheric ozone has just been given a boost.

States that several interlinked processes have been suggested as contributing to the warming, including stratospheric ozone depletion, local sea - ice loss, an increase in westerly winds, and changes in the strength and location of low — high - latitude atmospheric teleconnections

«Although stratospheric ozone losses are expected to stabilize and eventually recover to preindustrial levels over the course of the twenty - first century, these results show that increasing greenhouse gases will continue to intensify the polar vortex throughout the twenty - first century, but that radiative forcing will cause widespread temperature increases over the entire Southern Hemisphere.»

Observations of ozone show a thinning of the Earth's protective stratospheric ozone layer by about 3 to 8 % overall since the 1970s.

During the past 30 - 40 years, the SAM has gradually strengthened during austral summer (Marshall 2003), due mainly to human - caused stratospheric ozone depletion.

The same model generating the global mean temperature in this figure is also used to simulate the response of tropospheric winds to the Antarctic stratospheric ozone hole, for example.

We talk about the new paper «Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery» as published February 6, 2018.

Increased polar stratospheric ozone losses and delayed eventual recovery owing to increasing greenhouse - gas concentration.

Climate scientists studying three decades of ozone measurements from seven satellites see a positive trend in the upper stratospheric ozone thanks to international efforts to curb ozone - depleting substances.

As to the specific papers you cited, Miller et al 2006 states,» Recent changes in the magnitude of the annular patterns have been interpreted as the signature of anthropogenic forcing by changes in the concentration of greenhouse gases (GHGs) or else stratospheric ozone [Shindell et al., 1999; Fyfe et al., 1999; Kushner et al., 2001; Kindem and Christiansen, 2001; Sexton, 2001; Gillett and Thompson, 2003; Shindell and Schmidt, 2004; Arblaster and Meehl, 2006].»

Fourth, volcanic aerosols provide surfaces for heterogeneous chemistry affecting global stratospheric ozone distributions (Chipperfi eld et al., 2003) and perturbing other trace gases for a considerable period following an eruption.

The original theory of stratospheric ozone generation was published in the Memoirs of the Royal Meteorological Society by mathematician Sydney Chapman in 1930 [2].

«We should be mindful to the growing threat to stratospheric ozone posed by dichloromethane and similar chemicals not controlled by the Montreal Protocol.

And that presents a dilemma: As India expands access to a life - saving technology, it must comply with international mandates — the most recent imposed just last fall — to eliminate coolants that harm stratospheric ozone or warm the atmosphere.

Experts say the study provides the strongest evidence yet that a degraded stratospheric ozone layer causes more hazardous conditions for life on the planet's surface.

Current research combines the climate and chemistry changes in the GISS model to predict future stratospheric ozone amounts both over the polar regions and at lower latitudes.

Smaller decreases in stratospheric ozone amounts also have been observed over this same period in most other regions of the stratosphere.