Mountain Drag along the Gotthard Section during ALPEX
Mountain Drag along the Gotthard Section during ALPEX
复制标题
ALPEX 期间沿圣哥达路段的山地拖动
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
P. Phillips
中科院分区：
文献类型：
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作者：
H. Davies;P. Phillips
摘要推导了阿尔卑斯山圣哥达段内部压阻分量在ALPEX项目特殊观测期（1982年3月至4月）的时间变化估计。使用了从专门设计的中尺度微气压站阵列获得的表面压力数据，结果表明，该阻力分量相当于每单位面积的值，其变化在±5 Pa的数量级上，平均为± 0.78 Pa。结果表明，大气阻力时程的位相变化与天气尺度气流的发展有直接关系。然而，阻力的大小在很大程度上受到中尺度效应的影响。此外，指示给出的贡献的阻力的影响，昼夜变化，垂直传播的浮力波，和低层次的流动阻塞/偏转。这些阻力值的数量级（尽管估计中存在潜在的误差）表明阿尔卑斯山对大气层产生了重大影响。
Abstract An estimate of the time variation of the pressure drag component across the inner portion of the St. Gotthard section of the Alps is derived for the special observational period (March–April 1982) of the ALPEX project. Surface pressure data obtained from a purpose-designed, mesoscale array of microbarograph stations are used, and the results indicate that this drag component amounted to a value per unit area that varied on the order of ±5 Pa with a mean ∼0.78 Pa. It is shown that the phase variations of the time-trace of the drag are directly related to synoptic scale flow developments. However, the magnitude of the drag is substantially influenced by mesoscale effects. Further, an indication is given of the contribution to the drag of the effects of diurnal variation, vertically propagating buoyancy waves, and low-level flow blocking/deflection. The order of magnitude of these drag values (notwithstanding the potential errors in the estimates) indicates that the Alps exert a substantial influenc...