tailieunhanh - Báo cáo " Thunderstorm forecast technique for Noi Bai Airport "

This study briefly summarizes the thunderstorm activities in Vietnam. To predict thunderstorms in the Noi Bai Airport region, the thunderstorm indices are calculated for 64 grid points nearby Noi Bai region from the predicted meteorological fields with RAMS (Regional Atmospheric Modeling System) model. The forecast procedure for thunderstorm is built for this region with four prediction factors, such as CAPEmax, Kimax, SI min, Vtmax in the forecast threshold of . As a result, the occurrence of thunderstorms reaches 80% for the duration of 36 hours. The procedures may be used in the operational prediction. Keywords: Thunderstorm forecast; Thunderstorm index;. | VNU Journal of Science Earth Sciences 24 2008 125-132 Thunderstorm forecast technique for Noi Bai Airport Tran Tan Tien Nguyen Khanh Linh Cong Thanh Le Quoc Huy Do Thi Hoang Dung College of Science VNU Received 2 June 2008 received in revised form 3 July 2008. Abstract. This study briefly summarizes the thunderstorm activities in Vietnam. To predict thunderstorms in the Noi Bai Airport region the thunderstorm indices are calculated for 64 grid points nearby Noi Bai region from the predicted meteorological fields with RAMS Regional Atmospheric Modeling System model. The forecast procedure for thunderstorm is built for this region with four prediction factors such as CAPEmax Kimax SI min Vtmax in the forecast threshold of . As a result the occurrence of thunderstorms reaches 80 for the duration of 36 hours. The procedures may be used in the operational prediction. Keywords Thunderstorm forecast Thunderstorm index RAMS model. 1. Thunderstorms and their activity in Noi Bai area Thunderstorm is a weather phenomenon concerning to convective clouds which creates heavy rain strong wind possibly accompanied by thunder and lightning. Thunderstorm is one of severe weather phenomena having a great influence on many socio-economic fields such as aviation navigation tourism construction electricity telecommunications . The occurrence of a thunderstorm usually leads to the occurrence of wind shear heavy rain and possibly is accompanied by hail atmospheric electric discharges sharp pressure variation . These meteorological phenomena cause a lot of difficulties for aircrafts in taking off and landing delaying and even causing damages for Corresponding author. Tel. 84-4-8584943. E-mail tientt@ traffic means in air and on sea for manufacturing and human activities. Through the actual operation of Noi Bai Airport it indicates a high number of flights delayed by thunderstorms. In fact a large amount of aircraft accidents occurred at airports and lanes throughout the world

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• VNU Journal of Science
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