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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
南極和北極哪個比較冷?
Jul 8th 2013, 11:33

"轉貼"
南極最冷

南極的高緯度及冰封的大地讓此地成為地球上最寒冷的地區。根據當地觀測站的人工記錄,南極最低溫曾到-80.6℃,而北極透過衛星所測得的最低溫是-48.9℃,還差南極一大截。

當然,地球的兩極都很冷,主要是因為它們所接受到的太陽輻射遠不如中緯度及赤道那麼多。再者,極地所接受到的日照大多數被雪白的地表反射掉了。

在南極,冰層的表面比海平面高出兩公里,在這種高地裡,空氣較稀薄也較冰冷。平均來說,南極目前是地球上最高的一塊大陸。相對地,北極位居北極海之中,浮冰的表面僅突出海平面一英尺。此外,南極地表下有大片土地,而包圍著北極的北極海卻是個絕佳的熱調節器,在冬天它溫暖了冷空氣,在夏天則從大氣中吸收熱氣。

參考資料 知識+

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