【作者】 滕跃； 王万瑞；

【Author】 TENG Yue1 HUANG Bao-xia2 (1.Shaanxi Province meteorological services center, Xi’an Shaanxi 710015, China;)

【机构】 陕西省气象科技服务中心； 陕西省气象局；

【摘要】 2006年陕西共发生沙尘天气13次,其中4月11日的沙尘天气最为严重,危害最大,这也是陕西近10a来最为严重的一次沙尘暴天气过程。这次沙尘天气带来一系列的天气演变过程,它持续时间虽然只有8～9h,但覆盖面积大,影响范围广,全省70%～80%左右的区域都受到了影响,是近10a来陕西最为严重的一次沙尘天气过程。本文运用FY-2卫星红外云图及MICAPS2.0模式中的数值预报进行分析,发现红外云图呈现出异常状态,高低空形势配合较好,气压梯度、温度梯度密集,狂风突起等状况,试图揭示与解读沙尘天气在发生过程中某些气象因子的特征及其对沙尘天气的影响机理,为今后预报沙尘暴强度和发生区域提供一定的理论依据。更多还原

【Abstract】 There were thirteen sand-dust weather processes in Shaanxi province in 2006. In these sand-dust weather processes, the sand-dust weather process on April 11 was the most serious sandstorm weather process in this year and in the last 10 years. This sand-dust weather process induced a series of development of Weather Process; although it only lasted for eight to nine hours, it influenced most area (70 to 80 percent) of the whole province. In order to reveal the characteristics of some meteorological factors in the process of sand-dust weather and its mechanism, the numerical forecast in FY-2 satellite infrared cloud image and MICAPS2.0 model about this sand-dust weather process was analyzed in this study. The results showed that there were abnormal state in infrared cloud image; suitable matching of high and low altitude position, abnormal denseness of pressure and temperature gradient and bursting with fresh gale. The results of this study provided some theory basis for the forecast of the level and the occurrence region of sandstorm.更多还原