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000028524 084__ $$2WoS$$aMeteorology & Atmospheric Sciences
000028524 1001_ $$0P:(DE-HGF)0$$aAlicke, B.$$b0
000028524 245__ $$aOH formation by HONO photolysis during the BERLIOZ experiment
000028524 260__ $$aWashington, DC$$bUnion$$c2003
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000028524 440_0 $$06393$$aJournal of Geophysical Research D: Atmospheres$$v108$$x0148-0227
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000028524 520__ $$a[1] The photolysis of nitrous acid (HONO) in the early morning hours is an important source of OH radicals, the most important daytime oxidizing species. Although the importance of this mechanism has been recognized for many years, no accurate quantification of this OH source is available, and the role of HONO photolysis is often underestimated. We present measurements of HONO and its precursor NO2 by Differential Optical Absorption Spectroscopy (DOAS) during the Berliner Ozonexperiment (BERLIOZ) field campaign in July/August 1998 at Pabstthum near Berlin, Germany. HONO concentrations, formation rates, and simultaneously measured HONO photolysis frequencies are used to calculate the total amount of OH formed by HONO photolysis during a full diurnal cycle. A comparison with the OH formation by photolysis of O-3 and HCHO and by the reaction of alkenes with ozone shows that HONO photolysis contributed up to 20% of the total OH formed in a 24 hour period during this campaign. In the morning hours, HONO photolysis was by far the most important OH source during BERLIOZ.
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000028524 65320 $$2Author$$aHONO
000028524 65320 $$2Author$$aphotochemistry
000028524 65320 $$2Author$$aOH
000028524 65320 $$2Author$$aphotolysis
000028524 65320 $$2Author$$aHCHO
000028524 65320 $$2Author$$aozone
000028524 7001_ $$0P:(DE-HGF)0$$aGeyer, A.$$b1
000028524 7001_ $$0P:(DE-Juel1)16326$$aHofzumahaus, A.$$b2$$uFZJ
000028524 7001_ $$0P:(DE-Juel1)16342$$aHolland, F.$$b3$$uFZJ
000028524 7001_ $$0P:(DE-Juel1)VDB808$$aKonrad, S.$$b4$$uFZJ
000028524 7001_ $$0P:(DE-Juel1)16214$$aPätz, H.-W.$$b5$$uFZJ
000028524 7001_ $$0P:(DE-HGF)0$$aSchäfer, J.$$b6
000028524 7001_ $$0P:(DE-HGF)0$$aStutz, J.$$b7
000028524 7001_ $$0P:(DE-Juel1)6742$$aVolz-Thomas, A.$$b8$$uFZJ
000028524 7001_ $$0P:(DE-HGF)0$$aPlatt, U.$$b9
000028524 773__ $$0PERI:(DE-600)2016800-7 $$a10.1029/2001JD000579$$gVol. 108, p. D4$$pD4$$q108<D4$$tJournal of geophysical research / Atmospheres  $$tJournal of Geophysical Research$$v108$$x0148-0227$$y2003
000028524 8567_ $$uhttp://dx.doi.org/10.1029/2001JD000579
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