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The ''meiyu'' front, also known as ''baiu'' front, is a persistent nearly stationary weak baroclinic zone in the lower troposphere. It is located over the east coast of China and Taiwan at its western end, and over the Pacific Ocean south of Japan at its eastern end.
The term '' meiyu'' (''mei-yu'') is Chinese for "plum rains", pronounced ''baiu'' (''bai-u'') in Japanese ().
The ''meiyu'' front, also known as ''baiu'' front, is a persistent nearly stationary weak baroclinic zone in the lower troposphere. It is located over the east coast of China and Taiwan at its western end, and over the Pacific Ocean south of Japan at its eastern end.
The term '' meiyu'' (''mei-yu'') is Chinese for "plum rains", pronounced ''baiu'' (''bai-u'') in Japanese ().
Description
The ''meiyu'' front stretches from the Tibetan Plateau to Japan along a confluentjet stream
Jet streams are fast flowing, narrow, meandering thermal wind, air currents in the Atmosphere of Earth, atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are west ...
that separates Arctic circulation to the north from tropical circulation to the south. During mid-spring to mid-summer, the upper circulation is typically west-east and the front is mostly stationary.
Along this boundary, mesoscale convective complexes (MCCs) or mesoscale convective systems (MCSs) tend to form and propagate eastward, giving a series of heavy downpours.
The system extracts moisture, from the South China Sea and sometimes the Bay of Bengal. The low-level warm air is lifted by the low level jet
Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds (flowing west to east) ...
on the equator side of the baroclinic zone. The deep vertical motion giving birth to organized MCCs/MCSs is especially strong when the low-level warm air enters the area situated beneath the jet entrance region aloft. Rainfall along this boundary tends to be particularly heavy in post- El Niño summers, such as the summer of 2016.See also
* East Asian rainy seasonReferences