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Measurements of vertical wind profile and diffusion parameters with the doppler sodar
2069
Abstracts of Other Papers
AIR TRACER EXPERIMENT
AROUND MT.TSUKUBA RADARS
BY TWO DOPPLER
SUSUMU KURITA, TAJCEHIKOSATOMURA and TOMOAKI YOSHIKAWA MeteorologicalResearchInstitute, Tsukuba, Ibaraki 305, Japan A remote sensing technique of pollutant diffusion in the atmosphere was studied for a real time monitoring system in a wide area. The first experiment was carried out around Mt. Tsukuba on 25-26 October 1983, using a system of two Doppler radcrs and radar reflective materials (&IT) for a trace of air pollutants. One of the two radars is the C-band (5.3 GHz) meteorological Doppler radar fixed at the Meteorological Research Institute (MRI). The other, an X-band (10 GHz) meteorological Doppler radar, was set near Noda city, about 30 km from MRl. Observation ranges of the radars were selected to be 64 km, and the obtained data were processed by computer and stored on magnetic tapes. During this project, five runs were carried out. In each run, 7-10 packs of chaff were scattered from an airplane on a line at about 1000 m height with about 5 km spacing between them. Main results obtained by this experiment are as follows: (a) Radar echo of chaff could be tracked for about l-2 h and 20-100 km. (b) Doppler velocity data were effective in avoiding interferences of ground clutter, despite the low elevation of the radar antenna so that the chaff echo was superimposed on the ground clutter. (c) Effects of the mountain on wind field were found from horizontal distributions of echo, and the wind profile was visualized by vertical cross-section. (d) This system has advantages, compared with conventional experiments, because 3-dimensional distributions of air pollutants, wind velocities and diffusivities over complex terrain are analyzed in detail.
MEASUREMENTS OF VERTICAL WIND PROFILE AND DIFFUSION PARAMETERS WiTH THE DOPPLER SODAR TOMOAKI Y OSHIKAWA MeteorologicalResearchInstitute,Tsukuba,Ibaraki 305, Japan Published in Papers in Met. and Geophysics 35, 39-48 (1984).
THOUGHTS
ON SUPPORTING SOPHISTICATED
THE PRACTICAL APPLICATION RESEARCH MODELS
OF
ROLF V. PANDER DcutscherWetterdienst.Ofl’enbach/Main,Germany We know that within research environments a certain emphasis is given to the development of physically quite comprehensive models. They surely are indispensable for simulating certain effects on mesoscale climate or detailed structures of actual weather developments. Because of their physical content, they take much longer to run than routine forecast models. Therefore, in the interest of helping them to reach the practical level more rapidly, the science of cybernetics could possibly show new pathways. This paper aims at a discussion in respect to possible useful keystones towards such a support.
ANALYTICAL
MODEL OF ATMOSPHERIC POLLUTANT THE COASTAL BOUNDARY LAYER
DISPERSION
IN
HYO CHOI Korea Ocean Research & Development Institute, P.O. Box Yeong-Dong 17, Seoul, Korea Contrary to the usual diurnal wind speed variation which shows an afternoon maximum and an early morning minimum, observations at a coastalsiteat Port Aransas, Texas show a night-time maximum wind
Abstracts of Other Papers
AIR TRACER EXPERIMENT
AROUND MT.TSUKUBA RADARS
BY TWO DOPPLER
SUSUMU KURITA, TAJCEHIKOSATOMURA and TOMOAKI YOSHIKAWA MeteorologicalResearchInstitute, Tsukuba, Ibaraki 305, Japan A remote sensing technique of pollutant diffusion in the atmosphere was studied for a real time monitoring system in a wide area. The first experiment was carried out around Mt. Tsukuba on 25-26 October 1983, using a system of two Doppler radcrs and radar reflective materials (&IT) for a trace of air pollutants. One of the two radars is the C-band (5.3 GHz) meteorological Doppler radar fixed at the Meteorological Research Institute (MRI). The other, an X-band (10 GHz) meteorological Doppler radar, was set near Noda city, about 30 km from MRl. Observation ranges of the radars were selected to be 64 km, and the obtained data were processed by computer and stored on magnetic tapes. During this project, five runs were carried out. In each run, 7-10 packs of chaff were scattered from an airplane on a line at about 1000 m height with about 5 km spacing between them. Main results obtained by this experiment are as follows: (a) Radar echo of chaff could be tracked for about l-2 h and 20-100 km. (b) Doppler velocity data were effective in avoiding interferences of ground clutter, despite the low elevation of the radar antenna so that the chaff echo was superimposed on the ground clutter. (c) Effects of the mountain on wind field were found from horizontal distributions of echo, and the wind profile was visualized by vertical cross-section. (d) This system has advantages, compared with conventional experiments, because 3-dimensional distributions of air pollutants, wind velocities and diffusivities over complex terrain are analyzed in detail.
MEASUREMENTS OF VERTICAL WIND PROFILE AND DIFFUSION PARAMETERS WiTH THE DOPPLER SODAR TOMOAKI Y OSHIKAWA MeteorologicalResearchInstitute,Tsukuba,Ibaraki 305, Japan Published in Papers in Met. and Geophysics 35, 39-48 (1984).
THOUGHTS
ON SUPPORTING SOPHISTICATED
THE PRACTICAL APPLICATION RESEARCH MODELS
OF
ROLF V. PANDER DcutscherWetterdienst.Ofl’enbach/Main,Germany We know that within research environments a certain emphasis is given to the development of physically quite comprehensive models. They surely are indispensable for simulating certain effects on mesoscale climate or detailed structures of actual weather developments. Because of their physical content, they take much longer to run than routine forecast models. Therefore, in the interest of helping them to reach the practical level more rapidly, the science of cybernetics could possibly show new pathways. This paper aims at a discussion in respect to possible useful keystones towards such a support.
ANALYTICAL
MODEL OF ATMOSPHERIC POLLUTANT THE COASTAL BOUNDARY LAYER
DISPERSION
IN
HYO CHOI Korea Ocean Research & Development Institute, P.O. Box Yeong-Dong 17, Seoul, Korea Contrary to the usual diurnal wind speed variation which shows an afternoon maximum and an early morning minimum, observations at a coastalsiteat Port Aransas, Texas show a night-time maximum wind