English Dictionary

geostrophic wind level

名詞

不可算名詞

(meteorology) The lowest level at which the wind becomes geostrophic. In practice, the geostrophic wind level is between 1.2 kilometers (3,928 feet) and 1.6 kilometers (5,238 feet). This wind level probably marks the upper limit of frictional influence of the earth's surface. The geostrophic wind level may be considered to be the top of the planetary boundary layer, that is, the base of the free atmosphere.

日本語の意味

気象学用語。地表近くでは摩擦が風に影響を与えるが、ある高度では風が地球の自転の影響であるコリオリ力と気圧勾配力の釣り合いにより、摩擦の影響が極めて小さくなる。その高度は通常1.2～1.6キロメートルとされ、大気境界層の上限、あるいは自由大気の基底とみなされる。

Pilots must account for the geostrophic wind level, typically between 1.2 and 1.6 kilometers, because it usually marks the top of the planetary boundary layer and influences flight planning.

操縦士は、通常1.2〜1.6キロメートルにある風が地衡風となる高度を考慮する必要があり、これは一般に惑星境界層の上端を示して飛行計画に影響を与えます。

意味（1）

(meteorology) The lowest level at which the wind becomes geostrophic. In practice, the geostrophic wind level is between 1.2 kilometers (3,928 feet) and 1.6 kilometers (5,238 feet). This wind level probably marks the upper limit of frictional influence of the earth's surface. The geostrophic wind level may be considered to be the top of the planetary boundary layer, that is, the base of the free atmosphere.