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000034305 1001_ $$0P:(DE-Juel1)6742$$aVolz-Thomas, A.$$b0$$uFZJ
000034305 245__ $$aInorganic trace gases and peroxy radicals during BERLIOZ at Pabstthum : an investigation of the Photo Stationary State (PPS) of NOx and O3
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000034305 440_0 $$06393$$aJournal of Geophysical Research D: Atmospheres$$v108$$x0148-0227$$yD4
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000034305 520__ $$a[1] Meteorological and chemical measurements, including peroxy radicals, made during the Berlin Ozone Experiment (BERLIOZ) in summer 1998 at Pabstthum, a rural site about 50 km NW of the city, are described. The analytical techniques and data quality are discussed, including the comparison of different methods deployed side by side at Pabstthum. The highest concentrations of NOx (>20 ppb) and other precursors were observed on days when relatively young air was advected to Pabstthum from the greater Berlin area. NOx often increased during the night due to emissions from the surrounding soils under stagnant conditions with a shallow boundary layer as is evident in the strong negative correlation between nocturnal NO mixing ratios and product of ozone and wind speed. The ozone production rate (PO3) calculated from the photostationary state (PSS) of NOx and O-3 increased with NO and reached values of up to 90 ppb h(-1). PO3 calculated from NO and the measured peroxy radical concentrations was much lower, around or below 10 ppb h(-1). The lower production rates obtained from the peroxy radical measurements are consistent with the ozone budget in the city plume of Berlin. The new JPL recommendation for the rate coefficient of the reaction of NO with O-3 slightly improves the disagreement between PSS and measured peroxy radicals. However, another enhancement of 10-20% in the rate coefficient would be required in order to match the results within the uncertainty of the measurements in the high NOx regime. Even then, PSS remains to overpredict PO3 by a factor of 2 at low NOx concentrations. Hence, a yet unidentified process must exist in the atmosphere that converts NO to NO2 without leading to a net production of ozone. The PSS results from other studies are similar as at Pabstthum, suggesting that the overestimation of peroxy radicals and PO3 by the PSS approach is not a particular feature of the conditions at the site.
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000034305 65320 $$2Author$$aperoxy radicals
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000034305 65320 $$2Author$$aphotostationary state
000034305 65320 $$2Author$$aPSS
000034305 65320 $$2Author$$afield campaign
000034305 65320 $$2Author$$aair quality
000034305 7001_ $$0P:(DE-Juel1)16214$$aPätz, H.-W.$$b1$$uFZJ
000034305 7001_ $$0P:(DE-Juel1)129209$$aHouben, N.$$b2$$uFZJ
000034305 7001_ $$0P:(DE-Juel1)VDB808$$aKonrad, S.$$b3$$uFZJ
000034305 7001_ $$0P:(DE-Juel1)VDB1063$$aMihelcic, D.$$b4$$uFZJ
000034305 7001_ $$0P:(DE-HGF)0$$aKlüpfel, T.$$b5
000034305 7001_ $$0P:(DE-HGF)0$$aPerner, C. R.$$b6
000034305 773__ $$0PERI:(DE-600)2016800-7 $$a10.1029/2001JD001255$$gVol. 108, p. 8248$$p8248$$q108<8248$$tJournal of geophysical research / Atmospheres  $$tJournal of Geophysical Research$$v108$$x0148-0227$$y2003
000034305 8567_ $$uhttp://dx.doi.org/10.1029/2001JD001255
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