But market rules still apply, and in this case they are a wind shear.
FORBES: Why Americans Should Go Postal Over The Postal Service Default
When the updrafts are strong and the wind shear large, the spin inside the mesocyclone becomes very fast.
Some experts are questioning what could have caused the crash, including whether wind shear may have played a role.
Sudden changes in wind speed or direction, known as wind shear, can lift or smash aircraft into the ground during landing.
"Something was obviously wrong with the pilot, and wind shear is a possibility that could lead to an unstable approach, " she said.
There are no data available about wind shear at the Bali airport.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
Over the past two decades, enhanced pilot training, better weather radar and improved cockpit decision-making have substantially reduced the hazards posed by wind shear around the world.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
For the largest legacy U.S., European and Asian carriers, avoiding or coping with such weather phenomenon has become routine, and major wind shear-related accidents have largely disappeared.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
If some wind shear would cross with another section a few hundred, or a thousand feet above it, you can end up in a condition where it'll actually cut like a knife, and slice the top of the balloon right off.
But in Hong Kong, which has comparable tropical weather patterns to Indonesia, nearly one in 500 arriving and departing flights have reported significant wind shear at the international airport since its opening in 1998, according to the Hong Kong Observatory's website.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
Most wind-shear and turbulence events are reported in March and April.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
The most advanced weather radar on the market, for example, lets pilots page through screens showing ever-changing maps of what's ahead--rain, approaching thunderstorms, turbulence, wind-shear threats--all color-coded on flat liquid crystal displays.
"Thunderstorms can lead to wind-shear events, " said Andrew Herdman, director general of the Association of Asia Pacific Airlines, though he added it is still too early to conclude that is what has happened with the Lion Air flight.
WSJ: Weather Scrutinized as Possible Cause of Lion Air Crash
应用推荐