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forecast parameter
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  forecast parameter
The manually entered data may include weather updates, load forecast parameter data, or execution commands.
      
This promising technique will be evaluated further as a robust forecast parameter for the Auto-nowcaster.
      
Evidence of ice near the tops of growing cumulus is used as a forecast parameter that rapid cloud growth will likely follow.
      


Using the method of tracking echo centroids, we have analysed the C-band digital weather radar data observed during the events of thirteen isolated severe storms and one squall line weather in 1987 and 1988, and presented the main results in forecast application, including forecast errors of cloud centroids under different weather conditions and for different intensity thresholds or different forecast time periods, and finally determined the suitable forecast parameters and corresponding...

Using the method of tracking echo centroids, we have analysed the C-band digital weather radar data observed during the events of thirteen isolated severe storms and one squall line weather in 1987 and 1988, and presented the main results in forecast application, including forecast errors of cloud centroids under different weather conditions and for different intensity thresholds or different forecast time periods, and finally determined the suitable forecast parameters and corresponding forecast accuracy. On the knowledge, we will further introduce this program of tracking and warning storms into our digital radar analysing system for applications of the hail suppression and the flood forecast.

本文利用矩心跟踪法,对平凉雷达观测基地的C波段数字化雷达在1987,1988年的13次对流天气过程和一次飑线天气过程中的雷达资料进行了处理,并分析了在两种不同天气条件下,不同回波强度阈值、不同预报时间、不同时间间隔情况下,预报下一时刻对流云中心位置产生的误差,确定了适当的预报参量和预报精度。在此基础上,准备在雷达系统中引入天气跟踪、警戒系统,为防雹工作和防洪工作提供信息。

Based on fuzzy characteristics of air pollutants and their correlation with various indices, the fuzzy recognition theory and models were proposed for forecasting the concentration of the air pollutant. Based on the models and recorded data, the optimal forecast parameters were able to be obtained. The theory and the models were applied to forecast the concentrations of SO2 in a city, the results are satisfactory.

根据大气污染物的浓度具有模糊性且与多种指标相关的特点,提出对其进行预测的模糊识别理论与模型.并以二氧化硫为例,由25个观测点大气中SO_2浓度和相关指标的实测资料,利用上述理论与模型得出最优模糊预测参数,并对其它5个观测点的SO_2浓度进行了预测检验.

The concept of helicity,defined as the inner product between streamwise vorticity and storm relative winds,has been reviewed. Six cases of severe convective storms over Beijing area are presented to acquaint the forecaster with a range of expected values. The results indicate that helicity may serve as a forecast parameter for severe convective storms.

介绍了螺旋度概念,指出螺旋度作为描述环境风场是否有利于强对流风暴生成的一个物理参数,在业务预报中具有实用价值。并用实例讨论了将其用于强对流预报时应注意的问题。

 
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