Sentences with phrase «ozone measurements with»

They then compared their yearly September ozone measurements with model simulations that predict ozone levels based on the amount of chlorine that scientists have estimated to be present in the atmosphere from year to year.

Not exact matches

THORNTON is a leader for pure water treatment measurement & control in pharmaceutical, semiconductor and power industries with parameters of conductivity / resistivity, TOC, pH, DO, dissolved ozone and flow.

«This is the only long - term data set with regular measurements of ozone - destroying compounds in the stratosphere,» says atmospheric chemist Darin Toohey of the University of California, Irvine.

Ozone measurements from the first week of March already show a region over the North Atlantic with very low ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 19Ozone measurements from the first week of March already show a region over the North Atlantic with very low ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 19ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 1980s).

... This brings up the nightmarish thought that if the chemical industry had developed organobromine compounds instead of the CFCs — or alternatively, if chlorine chemistry would have run more like that of bromine — then without any preparedness, we would have been faced with a catastrophic ozone hole everywhere and at all seasons during the 1970s, probably before the atmospheric chemists had developed the necessary knowledge to identify the problem and the appropriate techniques for the necessary critical measurements.

Comment on 13: I fully agree with Markus Rex that total ozone measurements can not give any clues on chemical destruction in isolated layers, and that we may have been lucky that O3 transport cancelled out the chemical thinning that happened during the last months.

Ozone measurements from the first week of March already show a region over the North Atlantic with very low ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 19Ozone measurements from the first week of March already show a region over the North Atlantic with very low ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 19ozone levels (< 250 Dobson units, versus minimum values of ~ 300 in the early 1980s).

This method uses consistency between direct normal and diffuse horizontal measurements together with a special regression technique for retrieval of daily time series of column mean aerosol particle size, aerosol optical depth, NO2, ozone and water vapor column amounts together with the instrument's calibration constants.

The error bar on ECV total ozone data (δTOC) shall be assessed and expressed as the percent relative difference with respect to correlative measurements of reference.

On average, the ozone measurement bias achieved by NDACC lidars is around 5 - 10 % below 20 km for instruments without Raman channels and 5 % for instruments with Raman channels, around 2 % at altitudes within 20 - 35 km, and around 5 - 10 % at altitudes above 40 km [Keckhut et al., 2004].

The second factor is the insulating effect of the atmosphere of which well over 90 % results from atmospheric water in the form of clouds and water vapour with the remaining 10 % due primarily from CO2 and ozone with just a slightly detectable effect from methane and a trivial effect from all the other gases named in tyhe Kyoto Accord that is so small it can't even be detected on measurements of the Earth's radiative spectrum.

About two years ago Stan Sanders group at JPL tossed a bombshell into our understanding of stratospheric ozone depletion, with a new, and much lower measurement of the chlorine peroxide (ClOOCl) absorption cross-section.

Our results, simulated with a radiative - photochemical model, are consistent with contemporaneous measurements of ozone from the Aura - MLS satellite, although the short time period makes precise attribution to solar effects difficult.

His research has been closely aligned with the development of increasingly sophisticated satellite platform measurements, such as the terrestrial radiation budget, ozone and weather - related data, and the need for increasingly sophisticated atmospheric models to assess and evaluate the information content and utility of these measurements.

``... the nightmarish thought that if the chemical industry had developed organobromine compounds instead of the CFCs — or alternatively, if chlorine chemistry would have run more like that of bromine — then without any preparedness, we would have been faced with a catastrophic ozone hole everywhere and at all seasons during the 1970s, probably before the atmospheric chemists had developed the necessary knowledge to identify the problem and the appropriate techniques for the necessary critical measurements.

Elimination of OMPS - Limb from NPOESS means that measurements of the complete ozone profile will end upon completion of the Aura mission (launched in 2004 with a 5 - year mission design lifetime).