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• W2189492770 abstract "The purpose of the present paper is studying spatial and temporal variations of stratospheric ozone by simultaneous measurements. The research has been performed in a rather interesting Arctic region where most frequently there are hurricanes in the winter stratosphere of the Earth so-called winter polar vortex. As a rule, the centre of the vortex lies in this area [1]. The regions which are inside the vortex are characterized by the lowered content of stratospheric ozone in comparison with areas beyond the vortex. A peculiarity in the natural behavior of O3 in the Arctic winter stratosphere is a strong variability of its losses in different years. Besides, the value of O3 decrease strongly depends on the temperature [2, 3]. We present the results of simultaneous observations of stratospheric ozone in the winter 2003/2004 at heights from 20 to 60 km. The measurements were conducted by the ground-based microwave instruments, which are at the Polar Geophysical Institute, Apatity (67°N, 35°E), Russia and at the Institute of Space Physics, Kiruna (68°N, 20°E), Sweden. Besides, we used the results of balloon measurements of ozone vertical distribution from the surface up to the heights of 25-30 km performed by electrochemical cell type ECC-6A at the Meteorological Institute, Sodankyla (67°N, 27°E), Finland and at the Alfred Wegener Institute, Koldewey-Station (79°N, 12°E), Spitsbergen. Now this technique is the most exact one (3-5 %) for the measurements of ozone vertical distribution [4]. The study of ozone vertical profile in the upper atmosphere (heights from 20 up to 60 km) in Apatity and Kiruna was carried out by ground-based microwave radiometry technique. For this purpose, the millimeter wave-range radiometers with a high resolution analyzer of spectrum were used. The technique is based on the measurements and analysis of spectrum of atmospheric thermal radiation in the ozone resonance lines (the rotational transitions). In the observations in the Kola Peninsula the rotational transition O3 40,4 – 41,3 (resonance frequency 101736.8 MHz) and in Kiruna two transitions O3 140,14 – 141,13 and 112,10 – 103,7 (resonance frequencies 195430.4 MHz and 195721.2 MHz, respectively) were used. The parameters of microwave instruments permit to obtain qualitative spectra of atmospheric lines O3 with the integration time of about one hour. With the use of retrieval procedure, they were transformed to ozone vertical profiles in the height range of 20-60 km. For processing the ozone spectra measured in Sweden, daily vertical pressure and temperature profiles were taken from the National Centers for Environmental Protection (NCEP). As a retrieval algorithm, the optimal estimation technique [5] was utilized. In the Kola Peninsula measurements, the vertical distribution of ozone was obtained using a fitting technique [6]. In these calculations both mean zonal monthly vertical distributions of pressure and temperature [7] and the data of temperature sounding for the observational region http://orbit-net.nesdis.noaa.gov/crad/st/amsuclimate/ [8] were used. The accuracy of the estimation of ozone vertical distribution is smaller than 20 % in the height range considered." @default.
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• W2189492770 date "2005-01-01" @default.
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• W2189492770 title "JOINT OBSERVATIONS OF THE BEHAVIOUR OF POLAR OZONE DURING WINTER 2003/2004 IN THE NORTHWEST SECTOR OF THE ARCTIC" @default.
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