Development of Mobile Acoustic Sounder and Its Meteorological Application

为了缩小多普勒雷达的体积，提高多普勒雷达的性能，我们对常规多普勒雷达进行了更新。特别是为了提高多普勒声雷达的观测效率，我们尝试制作一种移动的型多普勒声雷达。我们于2000年在京都大学DPRI宇之川水力学实验室对Sodar的试制技术指标进行了为期三个月的测试研究。经过这段时间的检验，我们于2001年7月在钏路的浓雾观测中使用了这台完成的移动的声雷达。在这次观测中，我们利用多普勒声雷达、边界层雷达等对夏季海雾的结构进行了综合观测，观测过程中观测到了低层大气边界层的冷空气入侵流动，并于8月中旬加入了对琵琶湖东岸大气与陆面能量交换的密集观测。从2002年12月起，这台移动的声雷达被安装在位于Shigaraki的京都大学RASC的MU雷达站，并进行了长期的连续观测。在这个过程中，我们证明了这种移动的声雷达的操作的稳定性。

For the downsizing, and the upgrade of the specification of the Doppler Sodar, we made a renewal of the ordinal Doppler Sodar. Especially, for the improvement of the efficiency of the observation using the Doppler Sodar, we tried to make a mobile type Doppler Sodar. We tested investigated the specification of the trial production of the Sodar in Ujigawa Hydraulics Laboratory of DPRI, Kyoto University for three months in 2000. After this check period, we used this completed mobile Sodar I n the intensive fog observation in Kushiro in July of 2001. In this observation, we made the integrated observation of the structure of the sea fog in summer time, using the Doppler Sodar, Boundary Layer Radar etc. During the observation, we observed the invading flow of cold air in the lower atmospheric boundary layer.In the middle of August, we joined the intensive observation of the energy exchange between atmosphere and land surface at the eastern coast of Lake Biwa. The development of the mixing layer in the morning of summer time, the local circulation of the land-lake breeze was observed.From December of 2002, this mobile Sodar were installed in the MU radar site of RASC of Kyoto University in Shigaraki and made the long term continuous observation. In this process, we demonstrated the stability of the operation of this mobile Sodar.