F.3 Physics 20點!

2008-01-07 5:32 am
Can anybody explain the cause of the winter monsoon in terms of convection?

回答 (2)

2008-01-07 9:03 am
✔ 最佳答案
在冬天,由於陸地比海洋散熱較快,亞洲大陸迅速冷卻,中北部地區如西伯利亞等地變得非常寒冷。當冷空氣在這些地區積聚到某一個程度時,會向南擴散,較強的冷空氣可以一股一股的從東北面到達香港,形成了影響我們的冬季季候風(有時亦稱季候風寒潮)。

用convection黎解釋, 個重點係"會向南擴散" 呢到, convection話俾我地知,因為熱air 會向上升, cold air 會向下降, 咁會做成convection,好似煮水咁,中間的水會向上,外層的水會向下,咁係底個D 水就會由旁邊向中間流.
咁個winter monsoon 都係咁,地面就好似個煮水個時個底咁,因為中北部較海面冷, 咁海的hot air 會向上,中北部的cold air 會向下,形成converction,咁地面的air 就會由冷的地方到較熱的地方,做成winter monsoon
2008-01-07 6:49 am
呢題應該係f4先要答- -
Nearly all wind system are convection currents of air because of differences
in temperature of different areas.(抄書)
我就知summer 個case
係唔係geographic= =
用我解法..
海ga heat capacity係好大相對land,所以相對難去升一度溫度
海上空氣難上升溫度因為海gain左 d energy from sun
係summer時有太陽時,
個太陽heat up the lands more quickly than the sea.
Warm air rises above the land and cool air blows in form the sea to replace it.This cause convection phenomenon.
參考: 自己


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