HR: 14:36h
AN: A43F-04    [Abstracts]
TI: Vertical Profiles of the Nitrate Radical in Israel Using MiniDOAS Sunrise Spectroscopy
AU: * Zingler, J
EM: Jutta.Zingler@iup.uni-heidelberg.de
AF: Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, Heidelberg, 69120 Germany
AU: Kern, C
EM: Christoph.Kern@iup.uni-heidelberg.de
AF: Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, Heidelberg, 69120 Germany
AU: Pedersen, D
EM: danielpd@netvision.net.il
AF: Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904 Israel
AU: Platt, U
EM: Ulrich.Platt@iup.uni-heidelberg.de
AF: Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, Heidelberg, 69120 Germany
AB: The nitrate radical (NO3) is a key component of nighttime chemistry in the troposphere and is responsible for the non-potochemical production of various radicals. It has been measured several times in the boundary layer using the classic method of Long Path Differential Optical Absorption Spectroscopy (LP-DOAS). Later, Multi-AXis (MAX)-DOAS measurements could detect vertical NO3-Profiles during sunrise by evaluating straylight spectra. We succeeded to combine the principle of MAX-DOAS with the MiniDOAS method. MiniDOAS uses miniature spectrometer for the measurement of straylight spectra, aiming for an optmized "result/effort" ratio. We will present the results of field measurements performed in summer 2005 in Jerusalem and in the Jordan Valley. Vertical profiles of NO3 have been found repeatedly in the urban environment of Jerusalem. Also in the Jordan Valley east of Jerusalem, there was evidence for NO3. This gives reason for the discussion of transport of a polluted plume. Finally, a comparison with simultaneous LP-DOAS measurements of nitrogen oxides will be presented.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005