两个早期冷季对流风暴的GOES微下击暴流产物的评估
Assessment of a GOES microburst product for two early cold season convective storms
摘要：
本文介绍了一个新的地球静止业务环境卫星（GOES）成像仪通道3 - 4亮温差（BTD）产品的两个早冷季强对流风暴事件发生在2010年11月17日和12月1日在大西洋中部地区的评估。这两次事件都涉及到在波托马克河和切萨皮克湾地区上空追踪时产生强烈下击暴流的飑线。最近已经发现，GOES红外通道3（水蒸气）和通道4（热红外）之间的BTD可以突出强烈的外流风生成（即下击暴流，微下击暴流）可能是由于对流层中层干燥空气进入深，潮湿的对流风暴的降水核心的通道。这两个案例证明了该图像产品在冷季对流风暴事件中的有效业务使用。
英文摘要：
This paper presents an assessment of the new Geostationary Operational Environmental Satellite (GOES) imager channel 3 - 4 brightness temperature difference (BTD) product for two early cold season severe convective storm events that occurred over the Mid-Atlantic region on 17 November and 1 December 2010. Both of these events involved squall lines that produced strong downbursts as they tracked over the Tidal Potomac River and Chesapeake Bay regions. It has been found recently that the BTD between GOES infrared channel 3 (water vapor) and channel 4 (thermal infrared) can highlight regions where severe outflow wind generation (i.e. downbursts, microbursts) is likely due to the channeling of dry mid-tropospheric air into the precipitation core of a deep, moist convective storm. These two cases demonstrate effective operational use of this image product for cold-season convective storm events.
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