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Detection of a katabatic wind event with GPS meteorology measurements at Scott Base Antarctica

机译:利用南极斯科特基地的GPS气象测量技术检测出白云风事件

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摘要

A katabatic wind event which dramatically affects the polar climate has been detected using GPS meteorology measurements. GPS-derived precipitable water vapor (GPS PWV) variability and its relation to a katabatic event at Scott Base station, Antarctica was investigated. The investigations using the data gathered from 21 to 30 November of 2002. They showed that the water vapor profile exhibited an irregular pattern with a maximum PWV of 7.38 mm (6 mm on average). This event was strongly influenced by relative humidity than by wind speed activity. The dominant wind flow during this period was from the North to Northeast (blowing from the Ross Sea) with a mean speed of 3.79 ms(-1). The PWV increased when the temperature was between -15 and -11A degrees C. During the katabatic event identified between 21:30 UT of 28 November and 18:40 UT on 29 November, the wind blew from the Southeast to South direction (from the Ross Ice Shelf) with a maximum speed of 10.92 ms(-1). The PWV increased 1.0 mm (23%) from the mean value accompanied by severe wind had pronounced effect on GPS observations.
机译:使用GPS气象学测量已经检测到严重影响极地气候的方舟风事件。研究了GPS产生的可降水量水汽(GPS PWV)的变异性及其与南极斯科特基站的爆炸事件的关系。使用2002年11月21日至30日收集的数据进行的调查。结果表明,水蒸气剖面显示出不规则图案,最大PWV为7.38毫米(平均6毫米)。相对湿度比风速活动对这一事件的影响更大。在此期间,主要风向是从北到东北(从罗斯海吹来的),平均风速为3.79毫秒(-1)。当温度在-15至-11A摄氏度之间时,PWV升高。在11月28日UT 21:30 UT和11月29日UT 18:40 UT之间发生的爆炸事件期间,风从东南方向吹向南Ross Ice Shelf),最高速度为10.92 ms(-1)。 PWV比平均值高1.0毫米(23%),伴有强风,对GPS观测有明显影响。

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