作者SicilyDevil (想到就要馬上去做)
看板TY_Research
標題Re: [轉錄]Re: [請益] 幾題自然與生活科技的問題
時間Sun Jun 20 10:18:17 2010
可以幫解釋一下嗎 謝謝 我想我可以好好跟學生說明風了 ：）
摘自維基百科
http://en.wikipedia.org/wiki/Wind
裡面有提到風的定義
但有很多關鍵字：Geostrophic wind , Thermal wind , Gradient wind
Winds defined by an equilibrium of physical forces are used in the decompositi
on and analysis of wind profiles.
They are useful for simplifying the atmospheric equations of motion and for making qualitative arguments about the horizon
tal and vertical distribution of winds.
The geostrophic wind component is the result of the balance between Coriolis force and pressure gradient force. It f
lows parallel to isobars and approximates the flow above the atmospheric bound
ary layer in the midlatitudes.
The thermal wind is the difference in the geostrophic wind between two levels in the atmosphere. It exists only in an atm
osphere with horizontal temperature gradients.
The ageostrophic wind component is the difference between actual and geostrophic wind, which is responsib
le for air "filling up" cyclones over time.
The gradient wind is similar to the geostrophic wind but also includes centrifugal force (or centripetal acc
eleration).
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推 tytony :Geostrophic wind 地轉風：氣壓梯度力與科氏力達平 06/20 10:34
→ tytony :衡的風，沒有摩擦力存在，風向平行等壓線 06/20 10:35
→ tytony :Thermal wind 熱力風：是地轉風"垂直風切" 而非"風" 06/20 10:35
→ tytony :是地球回歸地轉平衡時產生的結果 06/20 10:36
→ tytony :Gradient wind 梯度風：考慮氣壓梯度力、科氏力和離 06/20 10:36
→ tytony :心力的風 06/20 10:36
→ tytony :上面這些在大氣系的大氣動力學相當於1~2章的份量 06/20 10:37
→ tytony :想深入了解可以找大氣動力學相關課本 06/20 10:37
推 caterlanse :補充~所謂垂直風切是指高低層風向量的差異(包括風向 06/20 10:40
→ tytony :不過我想國中應該不用提到熱力風和梯度風 太艱深了 06/20 10:40
→ caterlanse :跟風速)~另外兩個就是對大氣幾項作用力的平衡~不過好 06/20 10:41
→ caterlanse :像不須要解釋這麼深入? 06/20 10:42
→ tytony :剛發現向量好像是高中才教....||| 06/20 10:42
→ SicilyDevil :國中我有教 但是不深入就是了 這很重要 06/20 10:52
→ SicilyDevil :尤其是講解力學、運動學的時候 幫助很大 06/20 10:52
→ SicilyDevil :另外有提到啥瞇程式來分析垂直水平方向的力？ 06/20 10:58