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多普勒雷达数据处理显示系统 总被引:5,自引:1,他引:5
多普勒天气雷达目前已经成为对短时强烈天气进行监测的主要手段之一。为了方便资料的处理和分析 ,将科研成果向业务应用转化 ,提高观测资料软件和资料处理能力 ,为预报员和科研人员提供方便 ,我们开发了多普勒雷达资料分析显示系统。该软件是兼原始数据处理、反演、显示功能于一体的雷达数据处理系统 ,有很好的兼容性和可移植性 ,其交互式、多线程、多窗口、多任务的汉化操作界面 ,灵活、简便 ,容易使用。根据用户需要 ,水平风场可用风矢量、风羽、流线或等值线等不同方式表达 ,多种水平变量也可以任意叠加 相似文献
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In this paper, Indian monsoon of 1980 and 1981 is analysed based on the seasonal and half-month averaged data of 850 hPa of ECMWF analysis. The results show that Indian monsoon is related to Somali jet, the low-latitude easterlies and the mid-latitude westerlies over southern Indian Ocean, which are associated with the stationary wave of Southern Hemisphere. The forces affecting on the low-level flow are diagnosed, which display the relationship between Indian monsoon and the associated low-level flow. 相似文献
4.
TRAJECTORY DIAGNOSIS OF AIR PARCELS IN HIGH-AND LOW-LEVEL JETS FOR A HEAVY RAINFALL CASE DURING MEIYU SEASON OF 1991
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Trajectory diagnostic methods were used to analyze air parcels of high-and low-level jets during the heavy rainfall of 4-6 July 1991.It is found that air parcels above rainfall area travelled from the entrance of the high-level jet,passing through the jet center and reached the exit region.Upper tropospheric divergence over rainfall area resulted from decelerative motion of the jet flow.Warm and moist southwest flow converged and ascended ahead of the low-level jet.The decreasing of low-level pressure as a result of high-level divergence that caused the low-level jet became unexpectedly strong. 相似文献
5.
Tao Zuyu 《Acta Meteorologica Sinica》1994,8(3):337-345
The error distributions of the wind fields retrieved from single and dual-Doppler radar observations are given inthis paper.The results indicate that the error of dual-Doppler retrieval depends on the position in the scan region of thedual-Doppler radar.The error of single-Doppler retrieval by using velocity azimuth processing(VAP)technique de-pends on the angle between the directions of wind and the radar beam.Generally,the winds retrieved from single Doppl-er radar are close to those retrieved from dual-Doppler radar.But,the error distribution of the single-Doppler retrievalis different from the dual-Doppler retrieval.We simulate the retrievals of single Doppler observation by the use of theoutput wind data from a 3-D numerical model of severe convection.The comparison of the simulated single-anddual-Doppler retrievals shows that the VAP may be a suitable technique for the operational analysis of mesoscale windfields.It can also be used as a supplement to wind field retrieval in the field experiment. 相似文献
6.
A case of mesoscale convective complex(MCC)which evolved into a vortex is documented in this paper.As theMCC entered into the dissipating phase,a well-defined spirally banded structure became visible in the satellite image.The blackbody temperature(TBB)of the residual cold-cloud-shield indicates the vortex existed in the layer from 400 to250 hPa.According to the upper air analysis,the upper level vortex was an anticyclone.The MCC-generated vortex wasvisualized in the satellite images because it was located in the subtropical high where the wind field was very weak. 相似文献
7.
Tao Zuyu Wang Hongqing Bai Jie Zhu Wenqin Shi Dingpu Yang Hongmei 《Acta Meteorologica Sinica》1995,9(2):184-189
A case of mesoscale convective complex(MCC) which evolved into a vortex is documented in this paper.As the MCC entered into the dissipating phase,a well-defined spirally banded structure became visible in the satellite image.The blackbody temperature(TBB) of the residual cold-cloud-shield indicates the vortex existed in the layer from 400 to 250 hPa.According to the upper air analysis,the upper level vortex was an anticyclone.The MCC-generated vortex was visualized in the satellite images because it was located in the subtropical high where the wind field was very weak. 相似文献
8.
利用北京大学地球物理系暴雨监测与预报国家重点实验室发展的有限区域数值预报模式,对1992年16号台风进行了12h数值模拟。时间是从8月31日12时(世界时)到9月1日00时。结果显示:模式预报的台风和实际台风的移动方向一致,移动距离相当。模式清楚地预报出了由台风倒槽所造成的强降水。这表明模式对台风路径、台风降水等都有较强的预报能力。还进行了对比实验,研究地形和积云对流等对登陆台风发展和降水的影响。结果表明:地形对台风的位置和降水有重大影响,积云对流除了对台风强度有影响之外,对台风环流的位置和台风的移动速度也有影响。 相似文献
9.
1991年梅雨期中冷空气活动的个例分析 总被引:4,自引:1,他引:4
通过对1991年7月4—6日江淮地区大暴雨过程中冷空气的轨迹分析表明,来自西北方向的冷空气造成了冷暖空气在长江流域的对峙和高原东侧50hPa槽的发展,后者又进而促使了梅雨锋上的气旋发展。 相似文献
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