Traditional Culture Encyclopedia - Weather inquiry - Is the topographic precipitation formed by topographic uplift windward?
Is the topographic precipitation formed by topographic uplift windward?
It is not a "topographic uplift", but a precipitation phenomenon caused by the forced uplift of airflow along the hillside. It is said that topographic precipitation often occurs on windward slopes. When the warm and humid airflow passes through the mountain, if the atmosphere is unstable, it can also produce convection and form cumulus clouds. If the upward movement of airflow on the mountain is combined with the thermal convection in front of the hillside, cumulonimbus will develop into cumulonimbus and form convective precipitation. In the process of frontal movement, if the frontal direction is blocked by the mountain, the frontal movement speed will slow down, the precipitation area will expand, the precipitation intensity will increase and the precipitation time will be prolonged, resulting in continuous rainy weather, which can last for more than 10 ~ 15 days.
In the world, the wettest place often appears on the windward slope of the mountain, which is called rain slope; The leeward slope has less precipitation and becomes a dry slope or "rain shadow terrain". For example, the northern, eastern and southern slopes of Scandinavia, Norway are windward, with precipitation reaching1000 ~ 2,000 mm, and the leeward slope is only 300 mm For example, the northern, eastern and southern slopes of Taiwan Province Province, China are windward, with more precipitation, with an annual rainfall of more than 2,000 mm, and the Taipei fire reached 8,408.
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