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找尋鋒面之要領
2009/06/12 16:13
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找尋鋒面之要領※※

Rules for Finding Fronts

1.     尋找強烈溫度梯度(差)之所在,鋒面將會在強烈溫度梯度之較暖(南方)之區域。

      Look for a strong temperature gradient (difference). The front will be at the warm side of the sharpest gradient.

2.     同樣的,找尋強烈露點溫度梯度之處,鋒面將會在強烈露點溫度梯度之較暖(南方)之區域。

  Likewise, look for a strong dew point gradient. The front will be on the warm side of the gradient.

3.     鋒面會在氣壓槽所在之處。

  The front will be found in a pressure trough.

4.  察看3小時氣壓變化(氣壓趨勢),瞭解氣壓趨勢,鋒面經過時氣壓會先下降而後再上升3小時氣壓趨勢可以給我們很好氣壓變化的蹤跡。

   Look at the three-hour pressure changes, known a tendencies. With the passage of the front the pressure will decrease then increase, giving a trace, which looks like a check mark, or check tendency.

5.     尋找明顯風向之變化,風向有逆鐘向(氣旋式)之風切通常顯示有鋒面經過。

   Look for a sharp change in the wind direction. A cyclonic shear in the wind usually indicates frontal passage.

6.     檢查天氣現象和雲之型態,通常他們會伴隨著不同型態之鋒面。

   Check weather and cloud patterns that are usually associated with different kinds of fronts.

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