最終更新日：2025/11/21
(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.
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geostrophic wind level
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元となった辞書の項目
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。
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.
