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HAIL PROGNOSYS IN INDONESIA BY USING SEVERE HAIL INDEX METHOD BASED ON DOPPLER WEATHER RADAR OBSERVATION DATA

机译:基于多普勒天气雷达观测数据的严格冰雹指数方法,印度尼西亚的冰雹预测

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Hail is one of many extreme weather categories that has significant hazard to the environment. Meteorological instrument that has high temporal and spatial resolution to detect and predict hail occurrence is Doppler weather radar, and one of many methods that can be used to prognose its occurrence is Severe Hail Index (SHI). SHI values is calculated in Jm~(-1)s~(-1) based on flux values of hail kinetic energy, maximum reflectivity, freezing level, and -20°C temperature height. Another indexes that used in SHI method are POSH (Probability of Severe Hail) that's calculated in percent (%), and MEHS (Maximum Expected Hail Size) that's calculated in milimeters (mm). Hail occurred at Jakarta 22nd of April 2014 gives SHI 119.34 Jm~(-1)s~(-1), POSH 56.77 %, and MEHS 36.28 mm, calculated thirty minutes before hail. Hail occurrence at Denpasar 16th of December 2010 gives SHI 136.7 Jm~(-1)s~(-1), POSH 52.21 %, and MEHS 36.6 mm, calculated twenty minutes before hail. Hail occurrence at Surabaya, 20th of February 2014 gives SHI 293.39 Jm~(-1)s~(-1), POSH 81.79 %, and MEHS 54.16 mm, calculated ten minutes before hail, while hail occurrence at Surabaya, 20th of February 2015 gives SHI 69.04 Jm~(-1)s~(-1), POSH 42.08 %, and MEHS 26.48 mm, calculated thirty minutes before hail. Inappropriate value is found in hail occurrence at Jakarta 9th of February 2015 that has zero values of SHI and POSH, and Padang 21st of May 2014 that has zero values of POSH. Compared to the field observation, POSH is representative to predict hail occurrence in Indonesia, but there is an inappropriate values between MEHS and real condition. Another parameter should be added to avoid zero values of SHI and POSH when hail occurred. By using SHI method, hail can be predicted and early warning can be disseminated to reduce hail damage.
机译:冰雹是具有显著对环境有危害许多极端天气类别之一。具有高的时间和空间分辨率,以检测和预测发生冰雹气象仪器是多普勒气象雷达,并且可用于以预测其发生许多方法中的一种是强冰雹指数(SHI)。 SHI值计算在JM〜(-1)S〜(-1)的基础上冰雹动能,最大的反射率,冷冻水平,和-20℃的温度下的高度的通量值。在SHI方法使用的另一种指标是在百分比(%)来计算POSH(严重冰雹的概率),以及MEHS(最大预期冰雹尺寸),其在milimeters(毫米)来计算。冰雹发生在2014年4月的雅加达22日给SHI 119.34 JM〜(-1)S〜(-1),POSH 56.77%,而MEHS36.28毫米,冰雹前30分钟计算一次。冰雹发生在2010年12月16日登巴萨给SHI 136.7 JM〜(-1)S〜(-1),POSH 52.21%,而MEHS36.6毫米,冰雹20分钟前计算。冰雹发生在泗水,2014年2月20日给予SHI 293.39 JM〜(-1)S〜(-1),81.79 POSH%,并且MEHS54.16毫米,计算冰雹前十分钟,而在泗水冰雹发生,2015年2月20日给出SHI 69.04 JM〜(-1)S〜(-1),42.08 POSH%,并且MEHS26.48毫米,冰雹前30分钟计算一次。不适当值在冰雹发生在具有SHI和POSH的零个值2015年2月的雅加达9日发现的,并具有POSH的零个值2014年5月的21巴东。相比于实地观察,POSH是代表预测印尼冰雹发生,但MEHS和实际情况之间的不适当的值。另一个参数应该被添加到避免SHI和POSH的零个值冰雹发生时。通过使用SHI方法,冰雹可以预测和预警可以散发减少冰雹损坏。

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