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題名 | 海洋大氣邊界層和海洋上層混合層一維偶合模式研究 |
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作者 | 吳清吉; 賈新興; | 書刊名 | 大氣科學 |
卷期 | 20:4 1992.12[民81.12] |
頁次 | 頁363-386 |
分類號 | 351.936 |
關鍵詞 | 一維; 上層混合層; 大氣邊界層; 海洋; 偶合模式; 海氣交互作用; 紊流參數化; 慣性運動; 艾克曼螺旋; Air-sea interaction; Turbulence parameterization; Inertial motion; Ekman Spiral; |
語文 | 中文(Chinese) |
中文摘要 | 本文利用一個1½階紊流閉合的一維大氣-海洋偶合邊界層模式,探討在理想的初始條件下,海氣的交互作用,以及海面大氣邊界層和海洋上層混合層的成長情形。模式中,包含大氣和海洋輻射,海面溫度則由能量收支方程預報。 模式實驗結果顯示,白天因太陽短波輻射加熱,在海水表層形成穩定層,阻礙動量向下傳送,使海洋上層混合層發展較淺:反之,晚上,海面長波幅射冷卻,在海水表層形成不穩定層,加強紊流的傳送,使海洋上層混合層發展較深。 由能量收支方程所預報的海面溫度,呈現明顯的日夜變化,其日夜差距約在0.8℃左右,和一般的觀測相近。基本上,此模式可以合理地模擬海-氣偶合時,大氣邊界層和海洋上層混合層的發展、紊流場的特性和海面溫度的日夜變化。 |
英文摘要 | An one-dimensional coupled air-sea boundary layer model is used to study the growth of the marine atmosperic boundary layer and the upper oceanic boundary layer. The model includes the effect of radiation on the atmosphere and ocean. Sea surface temperature (SST) is predicted by a surface energy budget equation. In the daytime, the heating of solar radiation strengthens stratification and slows down the growth of upper oceanic boundary layer. On the other hand, during night time, sea surface cooling caused by longwave radiation enhances the instability and deepens the upper oceanic boundary layer. The predicted SST shows diurnal variation with a range of about 0.8℃ which is close to the observed value. In general, the model simulates the diurnal variation of SST and developments of the atmospheric and upper oceanic boundary layer reasonably well. |
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