Summary
Two techniques to measure tropospheric OH radicals in situ are currently being developed in our laboratory. First, the already established laser long-path absorption spectroscopy is modified by folding a ligth path of about 4 km length in a multireflection system of 20 m base length. The detection limit will be about 1–2*106 OH cm-3. Second, a laser-induced fluorescence instrument has been build, which uses the 308 nm excitation of the OH radicals at a reduced pressure and has an expected detection limit of 5*105 cm-3. In both developments special care is taken to avoid the self-generation of OH from ozone UV-photolysis by the probing laser beam.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Perner, D., Piatt, U., Trainer, M., Hübler, G., Drummond, J., Junkermann, W., Rudolph, J., Schubert, B., Volz, A., Ehhalt, D.H., Rumpel, K.J. and Helas, G. (1987). Measurements of tropospheric OH concentrations: a comparison of field data with model predictions. J. Atm. Chem. 5, 185 – 216.
Hübler, G., Perner, D., Platt, U., Tönnissen, A. and Ehhalt, D.H. (1984). Groundlevel OH radical concentration: New measurements by optical absorption. J. Geophys. Res. 89D, 1309 – 1319.
Dorn, H.P., Callies, J., Platt, U. and Ehhalt, D.H. (1988). Measurements of tropospheric OH concentrations by laser long-path absorption spectroscopy. Tellus 40B, 437 – 445.
Hofzumahaus, A., Dorn, H.-P., Callies, J., Platt, U. and Ehhalt, D.H. (1990). Tropospheric OH concentration measurements by laser long-path absorption spectroscopy. To be published.
Platt, U., Rateike, M., Junkermann, W., Hofzumahaus, A. and Ehhalt, D.H. (1987) Detection of atmospheric OH radicals. Free Rad. Res. Comms. 3, 165 – 172.
Platt, U., Rateike, M., Junkermann, W., Rudolph, J. and Ehhalt, D.H.. (1987) New tropospheric OH measurements. J. Geophys. Res. 93D, 5159 – 5166.
Wang, C.C., Davis, L.I., Wu, C.H. and Japar, S. (1976). Laser-induced dissociation of ozone and resonance fluorescence of OH in ambient air. Appi. Phys. Lett. 28, 14 – 16.
Hanabusa, M. and Wang, C.C. (1977). Pulsewidth dependence of ozone interference in the laser fluorescence measurement of OH in the atmosphere. J. Chem. Phys. 66, 2118 - 2120.
Ortgies, G., Gericke, K.-H. and Comes, F.J. (1980). Is UV laser induced fluorescence a method to monitor tropospheric OH ? Geophys. Res. Lett. 7, 905 – 908.
Davis, D.D., Rodgers, M.O., Fischer, S.D. and Asai, K. (1981). An experimental assessment of the 03/H20 interference problem in the detection of natural levels of OH via laser induced fluorescence. Geophys. Res. Lett. 8, 69 – 72.
Shirinzadeh, B., Wang, C.C. and Deng, D.Q. (1987). Pressure dependence of ozone interference in the laser fluorescence measurements of OH in the atmosphere. Appi. Opt. 26, 2102 – 2105.
Hard, T.M., Chan, C.Y. Mehrabzadeh, A.A. and O’Brien, R.J. (1989). Pressure dependence of ozone interference in the laser fluorescence measurement of OH in the atmosphere: comment. Appi. Opt. 28, 26 – 27.
Hard, T.M., O’Brien, R.J., Chan, C.Y. and Mehrabzadeh, A.A. (1984). Tropospheric free radical determination by FAGE. Environ. Sci. Technol. 18, 768 – 777.
Hard, T.M., Chan, C.Y., Mehrabzadeh, A.A., Pan, W.H. and O’Brien, R.J. (1986). Nature 322, 617 – 620.
Bakalyar, D.M., Davis, L.I., Chuan Guo, James, J.V., Spiros Kakos, Morris, P.T. and Wang, C.C. (1984). Shot noise limited detection of OH using the technique of laser-induced fluorescence. Appi. Opt. 23, 4076 – 4082.
Davis, L.I., Chuan Guo, James, J.V., Morris, T.M., Postiff, R. and Wang, C.C. (1985). An airborne Lidar instrument for detection of OH using the technique of laser-induced fluorescence. J. Geophys. Res. 90, 12835 – 12842.
Rodgers, M.O., Bradshaw, J.D., Sandholm, S.T., KeSheng, S. and Davis,D.D. (1985). A 2-Ä laser-induced fluorescence field instrument for ground-based and airborne measurements of atmospheric OH. J. Geophys. Res. 90, 12819 – 12834.
Shirinzadeh, B., Wang, C.C. and Deng, D.Q. (1987). Diurnal variation of the OH concentration in ambient air. Geophys. Res. Lett. 14, 123 – 126.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 ECSC, EEC, EAEC, Brussels and Luxembourg
About this chapter
Cite this chapter
Hofzumahaus, A., Dorn, HP., Platt, U. (1990). Tropospheric OH Radical Measurement Techniques: Recent Developments. In: Restelli, G., Angeletti, G. (eds) Physico-Chemical Behaviour of Atmospheric Pollutants. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0567-2_16
Download citation
DOI: https://doi.org/10.1007/978-94-009-0567-2_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6743-0
Online ISBN: 978-94-009-0567-2
eBook Packages: Springer Book Archive