In meteorology, a Lie wave is an atmospheric stationary wave, the most common form of which is a mountain wave. This phenomenon was first discovered by two German glider pilots in 1933 on the Giant Mountains. Lie waves are caused by the vertical displacement of air flow in the highlands affected by the vertical displacement of the terrain. This phenomenon usually occurs on the leeward side of mountains. When the wind passes through mountains or ridges, it will produce this periodic change in air pressure and temperature. and altitude changes.
Strong Lee waves can cause periodic changes in the profile of mountain ranges, and these changes can affect climate patterns and precipitation distribution.
The formation of Lee waves usually involves internal gravity waves that occur when stable stratified flow passes through an obstacle. The oscillations interact with the terrain, causing the air to rise and fall. These changes may create changes in moisture and meteorological conditions and may affect precipitation amounts. Therefore, Libo's impact is not limited to a specific climate region or weather event, but may also widely affect nearby ecosystems.
Libo may form certain clouds when there is enough moisture in the air. On the lee side of the mountains we can see interesting cloud shapes. These wave clouds do not move with the wind like ordinary clouds, but are fixed to the obstruction that created them. Lenticular clouds (such as lenticular clouds) may form when the tops of the waves cool due to adiabatic expansion. If there are alternating layers of dry and moist air above, multi-layered lens clouds will form.
The presence of these clouds is not only beautiful, but also reminds us of the complexity of atmospheric dynamics.
For gliders, Leebo provides the opportunity to ascend, allowing them to gain altitude or fly longer distances. Many world records have been set in the Libo region of the Western Sierra Nevada, Alps, Patagonian Andes and Southern Andes. Glider pilots in these areas can take advantage of Lee's updrafts to reach incredible heights, and the Perlan Project is experimenting with whether unpowered gliders can climb to the top of the troposphere, and successfully reached an altitude of 15,460 meters in Argentina.
However, the risks posed by Lee Bo cannot be ignored. Surges of air and vortices may cause danger to small aircraft (such as hot air balloons, hang gliders and paragliders), and may also cause accidents to large aircraft. For example, in 1966, an air accident caused by Lee Bo caused BOAC Flight 911 to disintegrate in the air near Mount Fuji, Japan.
In this situation, Lee Bo not only affects the climate, but also affects aviation safety.
In addition to Lee waves, there are many different types of waves that form under different meteorological conditions. For example, velocity shear can create waves, and pronounced shear waves form when there is a large difference in wind direction between two layers in an atmospheric inversion layer. When the stable layer passed to the upper part encounters turbulence in the lower part, phenomena similar to Lie waves may also form. These fluctuations and phenomena make the weather patterns and weather in mountainous areas more changeable.
Looking at the formation and impact of Li Bo, it can be said that climate and weather changes are an extremely complex process, with many factors intertwined. This makes us wonder, how do these seemingly small meteorological phenomena affect our lives?