大尺度海气相互作用中SST演变的数值模拟
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摘要: 本文研制了一个全球浅水耦合海气模式。模式海洋部分包含了关于海表温度的热力学方程;大气部分是球坐标下有地形的正压模式。大气受到来自海洋加热的强迫,驱动海洋的风应力与大气模式的风速成正比。以气候实时资料作初始场所做数值积分,结果显示西太平洋暖水地及赤道东太平洋冷舌的范围与形状能较正确模拟。海洋模式部分线性化与非线性化的对比试验,表明随时间增加,两者海温差异逐渐加大,且中、高纬的差异大于低纬。非线性项在中、高纬的作用不可忽视。混合参数试验指出预报的结果对参数的选择很敏感。
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