VDRAS產品在奧運氣象服務中的應用
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國家自然科學基金(40975026和40975086),中國氣象科學研究院災害天氣國家重點實驗室(2009LASWB04),2007年度城市氣象科學科學研究所開放基金(UMRF200707),公益行業項目(GYHY200706004 )和天津市科委應用基礎研究面上項目(07JCYBJC12800)共同資助


Application of VDRAS Products in Olympic Meteorological Service
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    摘要:

    著重分析了VDRAS要素在奧運會期間對流天氣形成過程中的演變特征。典型對流天氣個例分析表明,陣風鋒之間的碰撞對雷暴天氣的形成具有指示意義,其中VDRAS強梯度的存在能夠預示將要分離出陣風鋒;冷中心的加強意味著降水還將發展,減弱意味著降水要減弱。應用風廓線和自動氣象站資料對VDRAS的信息做檢驗,表明在0.18~1.6 km高度上風向基本一致,但是風速有時偏小2 m/s ;1.6~2.8 km高度上,風向和風速大體一致;2.8~3.5 km高度上,風向基本一致,但風速有時偏小2 m/s。VDRAS氣溫高于地面自動站的氣溫約3~4 ℃。

    Abstract:

    The features of VDRAS products at the initial stage of thunderstorms during the 2008 Olympic Games are analyzed. It is concluded that collision among gust fronts can cause thunderstorms. The strong temperature gradients of VDRAS mean that a gust front will be separated from its major cell. Meanwhile, the intensified cold center means that the thunderstorm will develop. The VDRAS products are verified by means of the wind profile and AWS (Automatic Weather Station) data from Haidian. The results indicate that the wind direction of VDRAS from 0.18 to 1.6 km of height were the same as the profile, but the wind speed was smaller. Wind direction and wind speed from 1.6 to 2.8 km were the same as the profile. The wind direction of VDRAS from 2.8 to 3.5 km was also the same as the profile, but the speed was sometime smaller. In addition, the temperature of VDRAS was about 3 to 4 ℃ higher than that of AWS.

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王彥,陳明軒,王令. VDRAS產品在奧運氣象服務中的應用[J].氣象科技,2010,38(5):645~648

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  • 收稿日期:2009-07-19
  • 定稿日期:2010-03-09
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