نتایج جستجو برای: level ozone

تعداد نتایج: 1099220  

2014

Ozone is well known as a powerful, fast reacting oxidant. Ozone based processes produce no by-product residual as non-reacted ozone decomposes to molecular oxygen. Therefore an application of ozone is widely accepted as one of the main approaches for a Sustainable and Clean Technologies development. There are number of technologies which require ozone to be delivered to specific points of a pro...

Journal: :Environmental pollution 2002
Jeremy E Diem Andrew C Comrie

A limited number of sample points greatly reduces the availability of appropriate spatial interpolation methods. This is a common problem when one attempts to accurately predict air pollution levels across a metropolitan area. Using ground-level ozone concentrations in the Tucson, Arizona, region as an example, this paper discusses the above problem and its solution, which involves the use of l...

Journal: :Applied optics 1996
G J Labow L E Flynn M A Rawlins R A Beach C A Simmons C M Schubert

We used a microcomputer-controlled total ozone portable spectroradiometer instrument #21 (MTOPS21) to measure solar radiation at 298, 304 and 310 nm in Greenbelt, Md., during 1995. One day's ozone measurements from a Brewer instrument (B105) were used to calibrate the 304- and 310-nm channel ratios to a theoretical model. Total ozone estimates were then determined for the entire MTOPS21 data se...

Journal: :Environmental pollution 2001
S Syri M Amann W Schöpp C Heyes

Tropospheric ozone concentrations regarded as harmful for human health are frequently encountered in Central Europe in summertime. Although ozone formation generally results from precursors transported over long distances, in urban areas local effects, such as reactions due to nearby emission sources, play a major role in determining ozone concentrations. Europe-wide mapping and modeling of pop...

2000
Henk Eskes Peter van Velthoven Ghada El Serafy

Ozone transport models driven by high-quality analysed meteorological wind fields have been demonstrated to produce realistic ozone distributions. We describe a data assimilation system (TM3-DAM, version 3) which is currently in use to assimilate near-real time GOME ozone data, and which produces (three-day or longer) ozone forecasts. The model is a tracer transport model, called TM3, with a pa...

2015
Gabriel Bekö Joseph G. Allen Charles J. Weschler Jose Vallarino John D. Spengler Qinghua Sun

Due to elevated ozone concentrations at high altitudes, the adverse effect of ozone on air quality, human perception and health may be more pronounced in aircraft cabins. The association between ozone and passenger-reported symptoms has not been investigated under real conditions since smoking was banned on aircraft and ozone converters became more common. Indoor environmental parameters were m...

Journal: :Biometrics 2016
Stacey E Alexeeff Gabriele G Pfister Doug Nychka

Climate change is expected to have many impacts on the environment, including changes in ozone concentrations at the surface level. A key public health concern is the potential increase in ozone-related summertime mortality if surface ozone concentrations rise in response to climate change. Although ozone formation depends partly on summertime weather, which exhibits considerable inter-annual v...

2002
Pawan K Bhartia

Preface Background The Ozone Monitoring Instrument OMI is a Dutch-Finnish ozone monitoring instrument that will fly on NASA's Aura Mission, part of the Earth Observation System (EOS), scheduled for launch in January 2004. OMI's measurements of ozone columns and profiles, aerosols, clouds, surface UV irradiance, and the trace gases NO 2 , SO 2 , HCHO, BrO, and OClO fit well into Aura's mission g...

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