Research flight observations of a prefrontal gravity wave near the southwestern UK
Research flight observations of a prefrontal gravity wave near the southwestern UK
复制标题
研究英国西南部附近前额重力波的飞行观测
作者：
Knippertz P
2009年11月24日1311 UTC， FAAM BAe146（图1）从克兰菲尔德机场（图2）起飞，飞往B488号研究航班，在英国西南进近上空朝着一个强烈的、向后倾斜的冷锋飞去。大约在那个时候，核心压力约为966mbar的母气旋集中在爱尔兰西北部，英国大部分地区位于广泛的层积云下的温暖区（图3）。典型的狭长而非二维冷锋的特征是温暖侧的高西南风，典型的发育良好的暖传送带（WCB）（Browning, 1990）。B488航班是2009年11月由美国国家大气科学中心（NCAS）资助的一系列研究飞行中的第三次。这些飞行构成了测试和提高BAe146飞机观测影响欧洲西北部的锋面天气系统和风暴的能力的试点活动，为英国参加国际野外活动T-NAWDEX （thorpex -北大西洋波导和下游撞击实验）做准备，该实验初步计划于2013年进行。B488的飞行模式与冷锋的时间演变如图2所示。在格林尼治标准时间1311分从克兰菲尔德起飞后，BAe146上升到约7公里（26000英尺）的巡航高度，然后向西南方向飞行，在1351分左右穿过南威尔士海岸。在UTC时间1409到1439之间，飞机下降到康沃尔西北海面上空15米（50英尺）的高度，此时飞行员估计波峰到波谷的高度在6米到12米之间，风力为波弗特级别的大风到风暴。这次飞行的第一个目标是测量湍流
At 1311 UTC on 24 November 2009 the Facility for Airborne Atmospheric Measurements (FAAM) BAe146 (Figure 1) took off from Cranfield Airport (Figure 2) for research flight B488 and headed towards an intense, rearward-sloping, cold front over the UK Southwest Approaches. Around that time, the parent cyclone with a core pressure of about 966mbar was centred to the northwest of Ireland, with most of the UK lying in the warm sector under widespread stratocumulus (Figure 3). The classical elongated and rather two-dimensional cold front was characterized by high southwesterly winds on the warm side, typical of a well-developed warm conveyor belt (WCB)(Browning, 1990). Flight B488 was the third of a series of research flights in November 2009 funded by the National Centre for Atmospheric Science (NCAS). These flights constituted a pilot campaign to test and improve the ability of the BAe146 aircraft to observe frontal weather systems and storms affecting northwestern Europe, in preparation for UK participation in the international field campaign T-NAWDEX (THORPEX-North Atlantic Waveguide and Downstream impact Experiment), which is tentatively scheduled for 2013. The flight pattern of B488 is depicted in Figure 2 together with the time evolution of the cold front. After take-off in Cranfield at 1311 UTC, the BAe146 ascended to a cruising altitude of about 7km (26 000ft) and then headed southwestward, crossing the coast of south Wales around 1351 UTC. Between 1409 and 1439 UTC the aircraft descended to 15m (50ft) over the sea surface to the northwest of Cornwall, at which point the pilots estimated the peakto-trough wave heights to be between 6m and 12m and the winds to be Gale to Storm Force on the Beaufort scale. The first objective of the flight was to measure turbulent
浅水方程数值模型中重力波的表示
影响因子：
8.9
作者：
A. Mohebalhojeh;D. Dritschel
通讯作者：
D. Dritschel
英国南部上空多条积雨云的二次引发。
影响因子：
8.9
作者：
J. Marsham;Douglas J. Parker
通讯作者：
Douglas J. Parker