During the Northern hemisphere winter season, biomass burning is widespread in West Africa, yet the total tropospheric column ozone values (<30 DU) over much of the Tropical Atlantic Ocean (15 N–5 S) are relatively low. At the same time, the tropospheric column ozone values in the Southern Tropical Atlantic are higher than those in the Northern Hemisphere (ozone paradox). We examine the causes ...

Present day tropospheric ozone and its changes between 1850 and 2100 are considered, analysing 15 global models that participated in the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP). The ensemble mean compares well against present day observations. The seasonal cycle correlates well, except for some locations in the tropical upper troposphere. Most (75 %) of the mode...

26 In situ tropospheric ozone measurements by balloon borne electrochemical concentration cell 27 (ECC) sensors above Ahmedabad in western India from May 2003 to July 2007 are presented, 28 along with an analysis of the transport processes responsible for the observed vertical ozone 29 distribution. This analysis is supported by 12-day back trajectory calculations using the 30 FLEXPART Lagrangi...

[1] We examined the role of variability in the input of stratospheric ozone on the interannual variability of tropospheric ozone in the northern extratropics using correlations of monthly ozone anomalies for the lower stratosphere and the troposphere. We used output from a multiyear simulation of the NASA Goddard Space Flight Center (GSFC) Chemistry and Transport Model (CTM), and evaluated mode...

[1] We perform a study for characterizing the vertical resolution of tropospheric ozone profile retrievals from the combination of simulated ultraviolet (UV) and thermal infrared (TIR) observations that are representative of the EOS Aura Ozone Monitoring Instrument (OMI) and the Tropospheric Emission Spectrometer (TES). Under the low thermal contrast conditions used for this simulation, we find...

Weather fleck observed on certain varieties of tobacco since 1052 at the U.S. r)epartment of Agriculture Plant Industry Station, Beltsville, Md., may be indicative of an ozone air pollr~tion problem arising in the Washington, I1.C. area. A study of ozone concentrations and meteorological conditions existing prior to and at the time of the occurrence of weather fleck indicates that the high ozon...

We repeatedly sampled the surface mineral soil (0-20 cm depth) in three northern temperate forest communities over an 11-year experimental fumigation to understand the effects of elevated carbon dioxide (CO(2)) and/or elevated phyto-toxic ozone (O(3)) on soil carbon (C). After 11 years, there was no significant main effect of CO(2) or O(3) on soil C. However, within the community containing onl...

There is considerable interest in studying tropospheric ozone because of its role as a greenhouse gas and as a key element in tropospheric chemistry. Heterogeneous chemistry involving reactions with aerosols and cloud droplets can affect O3 in a number of ways. The results of model studies show that aqueous phase chemistry is shown to decrease ozone concentrations significantly in the troposphe...

The odd-numbered carbon clusters C(119), C(129), and C(139) have been observed in the mass spectra of toluene extracts of fullerene soots and of the products of ozone-fullerene reactions. Specifically, ozone-C(60) reactions yield C(119), ozone-C(70) reactions yield C(139), and ozone-(C(60)/C(70)) reactions produce C(119), C(129), and C(139). These unexpected species correspond to dimers of C(60...

The new Ozone Mapping and Profiler Suite (OMPS), which launched on the Suomi National Polarorbiting Partnership satellite in October 2011, gives a detailed view of the development of the Antarctic ozone hole and extends the long series of satellite ozone measurements that go back to the early 1970s. OMPS includes two modules – nadir and limb – to measure profile and total ozone concentrations. ...