TY  - JOUR
AU  - Alicke, B.
AU  - Geyer, A.
AU  - Hofzumahaus, A.
AU  - Holland, F.
AU  - Konrad, S.
AU  - Pätz, H.-W.
AU  - Schäfer, J.
AU  - Stutz, J.
AU  - Volz-Thomas, A.
AU  - Platt, U.
TI  - OH formation by HONO photolysis during the BERLIOZ experiment
JO  - Journal of Geophysical Research
VL  - 108
SN  - 0148-0227
CY  - Washington, DC
PB  - Union
M1  - PreJuSER-28524
SP  - D4
PY  - 2003
N1  - Record converted from VDB: 12.11.2012
AB  - [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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000181797900001
DO  - DOI:10.1029/2001JD000579
UR  - https://juser.fz-juelich.de/record/28524
ER  -