Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 10 Observation, Prediction and Verification of Precipitation (EGU Session 2006) 2007 10.5194/adgeo-10-25-2007 http://www.adv-geosci.net/10/25/2007/ http://www.adv-geosci.net/10/25/2007/adgeo-10-25-2007.html http://www.adv-geosci.net/10/25/2007/adgeo-10-25-2007.pdf 25 29 2007-04-26 Freezing precipitation in Russia and the Ukraine I. A. Khomenko A. R. Ivanova ivanova@mecom.ru N. P. Chakina E. N. Skriptunova A. A. Zavyalova Ecological State University, Odessa, Ukraine Hydrometeorological Centre of Russia, Moscow, Russia Conditions for freezing precipitation (FP), including freezing rain (FR) and freezing drizzle (FZ) for 8 airports in Russia and 4 in the Ukraine are studied on the basis of 10 to 20-year series of surface observations, radiosonde and objective analysis data. Statistical characteristics are presented of the FP episode durations and of occurrence frequency dependences on surface air temperature, wind direction and speed and cloud base height. From the radiosonde data, it is found that the "classical mechanism" of FP generation (for which, stratification of "warm nose" type in the cloud layer is necessary) is not frequent: most of FP cases are associated with "all cold" conditions in the lower 3-km layer, that is, with negative temperatures in and below the clouds. Carriere, J.-M., Lainard, C., Le Bot, C., and Robart, F.: A climatological study of surface freezing precipitation in Europe, Meteorol. Appl., 7, 1–10, 2000. Chakina, N. P., Skriptunova, E. N., and Ivanova, A. R.: Conditions for freezing precipitation in the airports of Russia and CIS. 1. The Moscow airports, Russ. Meteorol. Hydrol., 6, 40–58, 2003. Chakina, N. P., Skriptunova, E. N., and Ivanova, A. R.: Conditions for freezing precipitation in the airports of Russia and CIS. II. The airport of Mineralnye Vody, Russ. Meteorol. Hydrol., 2, 27–42, 2005a. Chakina, N. P., Skriptunova, E. N., Ivanova, A. R., Khomenko, I. A., and Khomenko, G. V.: Conditions for freezing precipitation in the airports of Russia and CIS. III. The airport of Odessa, Russ. Meteorol. Hydrol., 9, 5–18, 2005b. Changnon, S. A.: Characteristics of ice storms in the United States, J. Appl. Meteorol., 42, 5, 630–639, 2003. Hux, J. D., Knappenberger, P. C., Michaels, P. J., Stenger, P. J., Cobb III, H. D., and Rusnak, M. P.: Development of a discriminant analysis mixed precipitation (DAMP) forecast model for Mid-Atlantic winter storms, Wea. Forecast., 16, 2, 248–259, 2001. Robbins, C. C. and Cortinas Jr., J. V.: Local and synoptic environments associated with freezing rain in the contiguous United States, Weat. Forecast., 17, 1, 47–65, 2002.