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000034288 084__ $$2WoS$$aEnvironmental Sciences
000034288 084__ $$2WoS$$aMeteorology & Atmospheric Sciences
000034288 1001_ $$0P:(DE-HGF)0$$aPlatt, U.$$b0
000034288 245__ $$aFree radicals and fast photochemistry during BERLIOZ
000034288 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V$$c2002
000034288 300__ $$a359 - 394
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000034288 440_0 $$03073$$aJournal of Atmospheric Chemistry$$v42$$x0167-7764
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000034288 520__ $$aThe free radicals OH, HO2, RO2, and NO3 are known to be the driving force for most chemical processes in the atmosphere. Since the low concentration of the above radicals makes measurements particularly difficult, only relatively few direct measurements of free radical concentrations have been reported to date. We present a comprehensive set of simultaneous radical measurements performed by Laser Induced Fluorescence (LIF), Matrix Isolation - Electron spin Resonance (MI-ESR), Peroxy Radical Chemical Amplification (PERCA), and Differential Optical Absorption Spectroscopy (DOAS) during the BERLIner OZonexperiment (BERLIOZ) during July and August of 1998 near Berlin, Germany. Most of the above radical species were measured by more than one technique and an intercomparison gave good agreement. This data set offered the possibility to study and quantify the role of each radical at a rural, semi-polluted site in the continental boundary layer and to investigate interconnections and dependencies among these free radicals. In general (box) modelled diurnal profiles of the different radicals reproduced the measurements quite well, however measured absolute levels are frequently lower than model predictions. These discrepancies point to disturbing deficiencies in our understanding of the chemical system in urban air masses. In addition considerable night-time peroxy radical production related to VOC reactions with NO3 and O-3 could be quantified.
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000034288 65320 $$2Author$$afree radicals
000034288 65320 $$2Author$$aphotochemistry
000034288 65320 $$2Author$$ahydroxyl radical
000034288 65320 $$2Author$$anitrate radical
000034288 65320 $$2Author$$aperoxy radical
000034288 65320 $$2Author$$aspectroscopy
000034288 65320 $$2Author$$amodelling
000034288 7001_ $$0P:(DE-HGF)0$$aAlicke, B.$$b1
000034288 7001_ $$0P:(DE-HGF)0$$aDubois, R.$$b2
000034288 7001_ $$0P:(DE-HGF)0$$aGeyer, A.$$b3
000034288 7001_ $$0P:(DE-Juel1)16326$$aHofzumahaus, A.$$b4$$uFZJ
000034288 7001_ $$0P:(DE-Juel1)16342$$aHolland, F.$$b5$$uFZJ
000034288 7001_ $$0P:(DE-HGF)0$$aMartinez, M.$$b6
000034288 7001_ $$0P:(DE-Juel1)VDB1063$$aMihelcic, D.$$b7$$uFZJ
000034288 7001_ $$0P:(DE-HGF)0$$aKlüpfel, T.$$b8
000034288 7001_ $$0P:(DE-HGF)0$$aLohrmann, B.$$b9
000034288 7001_ $$0P:(DE-Juel1)16214$$aPätz, H.-W.$$b10$$uFZJ
000034288 7001_ $$0P:(DE-HGF)0$$aPerner, C. R.$$b11
000034288 7001_ $$0P:(DE-Juel1)16347$$aRohrer, F.$$b12$$uFZJ
000034288 7001_ $$0P:(DE-Juel1)VDB2549$$aSchäfer, J.$$b13$$uFZJ
000034288 7001_ $$0P:(DE-HGF)0$$aStutz, J.$$b14
000034288 773__ $$0PERI:(DE-600)1475524-5$$a10.1023/A:1015707531660$$gVol. 42, p. 359 - 394$$p359 - 394$$q42<359 - 394$$tJournal of atmospheric chemistry$$v42$$x0167-7764$$y2002
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