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Simultaneous sodar sounding and direct measurements on meteorological mastстатья
- Авторы: Lokoshchenko M.A., Perepyolkin V.G., Mazurin N.F., Semenova N.V., Kulizhnikova L.K.
- Сборник: Proceedings of the 12th International Symposium on Acoustic Remote Sensing and Associated Techniques of the Atmosphere and Oceans
- Год издания: 2004
- Место издания: Clare College Cambridge, the United Kingdom
- Первая страница: 109
- Последняя страница: 112
- Аннотация: Results of three experiments in Obninsk (town in Kaluga region of Russia), which took place in 2000, 2001 and 2003, have been presented. During that time sodar “ECHO-1” of the Department of Meteorology and Climatology of the Moscow University was replaced thrice from Moscow to Obninsk, where it was installed near meteorological mast of the 300 m height. First, indirect data of a sodar record about the thermal stratification has been compared with temperature profiles. As a result, a sign of the vertical temperature gradient can be successfully determined by means of a sodar record in most cases. Second, a reliability of the Doppler sodar measurements of the vertical wind component W has been tested. It is shown that correlation between sonic measurements of W and the sodar ones usually is poor. However, it becomes statistically meaningful for separate recalculation, when only cases of intense vertical motions W > ± 0.1 m/s were taken into account. Third, the intensity of the sodar echo-signal has been compared with direct measurements of CT2 at various levels of the mast. The statistical connection of sodar and in situ measurements of CT2 seems to be clear only when a distance between both tools is extremely short – not more than 100 m. This connection is non-linear and can be closely approximated by exponential regression line. Possibly, non-linearity is a result of the sound attenuation on ray path from a sodar to a scattered volume and back.
- Добавил в систему: Локощенко Михаил Александрович