Sentences with phrase «in ozone column»

The most important attribute of changes in the Ozone column are the second order effects such as CH4 reduction.

Not exact matches

Over the last 50 years satellite and ground - based records over Antarctica show ozone column amounts ranging from 100 to 400 Dobson units, which translates to about 1 millimeter (1/25 inch) to 5 millimeters (1/6 inch) of ozone in a layer if all of the ozone were brought down to the surface.

The figure for the column between 12 and 20 kilometres altitude was a record low of 18 Dobson units, representing a loss of 83 per cent of the ozone in that layer.

Partial column ozone amounts in this layer declined from an average of 125 Dobson Units in July / August 2006 to 1.5 DU on October 6..

E.g. in 1999/2000 about 30 % of the total column ozone was destroyed by anthropogenic chemical loss, which is considerably less than the maximum loss at 19 - 20 km altitude.

Also, the overall number of ozone molecules destroyed in a vertical column of air was pretty much the same as the number of molecules transported into this column by the average poleward and downward transport of air in the stratosphere.

In an opinion column in the New York Times of March 27, 1990, Michael Oppenheimer (CFR) warned darkly: «Global warming, ozone depletion, deforestation and overpopulation are the four horsemen of a looming 21st century apocalypse.&raquIn an opinion column in the New York Times of March 27, 1990, Michael Oppenheimer (CFR) warned darkly: «Global warming, ozone depletion, deforestation and overpopulation are the four horsemen of a looming 21st century apocalypse.&raquin the New York Times of March 27, 1990, Michael Oppenheimer (CFR) warned darkly: «Global warming, ozone depletion, deforestation and overpopulation are the four horsemen of a looming 21st century apocalypse.»

The percentage of the total overhead ozone column destroyed is shown in Figure 2 for the years in our experiment with strongest and weakest wave energies.

In the worst years, two - thirds of the Arctic ozone column (the total amount of ozone between the ground and the top of the atmosphere) is destroyed in the most severely depleted regionIn the worst years, two - thirds of the Arctic ozone column (the total amount of ozone between the ground and the top of the atmosphere) is destroyed in the most severely depleted regionin the most severely depleted regions.

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.

In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor, as well as aerosol and other atmospheric constituents.

Archived total ozone column measurements from the World Meterological Organization (WMO)- Global Atmosphere Watch (GAW) network routinely deposited at the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) in Toronto, Canada (http://www.woudc.org) are utilized for the ground - based measurements referozone column measurements from the World Meterological Organization (WMO)- Global Atmosphere Watch (GAW) network routinely deposited at the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) in Toronto, Canada (http://www.woudc.org) are utilized for the ground - based measurements referOzone and Ultraviolet Radiation Data Centre (WOUDC) in Toronto, Canada (http://www.woudc.org) are utilized for the ground - based measurements reference.

Using the methodology described in great detail in that publication, 32 Brewer and 47 Dobson stations were considered as potentials for the comparisons with GOME, Sciamachy and GOME - 2 total ozone column data.

There is some consensus now that total column ozone varies significantly with the solar cycle, especially in the tropics.

The data basis of observations are total ozone columns measurements from three satellite borne instruments: the European satellite sensors GOME (ERS - 2), SCIAMACHY (ENVISAT), and GOME - 2 (METOP - A) are combined and added up to a continuous time series starting in June 1995.

Ozone absorbs energy in UV frequencies and warms changing the density of the air column and sea level pressure beneath the column.

-- Changes (order of a few percent) in globally averaged column ozone forced by the solar ultraviolet irradiance 11 - year cycle are now better understood, but ozone profile changes are less certain.

«If you look at the total atmospheric column, from your head on up to the top of the atmosphere, this solar proton event depleted less than one percent of the total ozone in the Northern Hemisphere,» Jackman said.

In terms of the springtime Antarctic total column ozone losses (ozone hole), the system has not recovered, but the rapid expansion of the pre-Montreal Protocol period has been reversed to modest declines.

It's measured in terms of the total ozone throughout a column of the atmosphere spanning from Earth's surface up to satellite height.

Some participants noted that even though a descoped OMPS on NPOESS will continue total - column ozone measurements, the OMPS - Nadir sensor lacks the state - of - the - art capability for measuring other trace species and for high spatial resolution, both of which are essential for advancing atmospheric research in the future.

This mission is accomplished through long - term observations and intensive field programs that measure total column ozone, ozone vertical profiles (ozonesondes and umkehrs), ground level ozone, and water vapor vertical profiles in the upper troposphere and stratosphere.