Accelerating the Convergence to Equilibrium of Ocean-Climate Models
Accelerating the Convergence to Equilibrium of Ocean-Climate Models
复制标题
加速海洋气候模型趋于平衡
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Bryan
中科院分区：
文献类型：
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作者：
K. Bryan
摘要大气环流模式中对应于气候平衡的解通常是通过对时间的扩展数值积分得到的。由于海洋包含更广泛的时间尺度，同样的程序是不实用的海洋环流模式。海洋包含与大气相同的高频波，此外，还具有与主温跃层以下的水团特性的缓慢扩散相关的超低频。对于存在平衡解的参数范围，基于扭曲物理的方法部分地规避了这一困难。扭曲的物理学通过减缓重力波和加速深海过程来压缩海洋模型的频带。深海过程的加速是通过降低局部热容量而不改变热量的输送和混合来实现的。数值积分的扭曲的物理海洋模式，然后收敛到平衡几乎一个…
Abstract Solutions corresponding to climatic equilibrium are usually obtained from atmospheric general circulation models by extended numerical integration with respect to time. Because the ocean contains a much wider range of time scales the same procedure is not practical for ocean general circulation models. The ocean contains the same high frequency waves as the atmosphere and in addition, has ultra low frequencies associated with slow diffusion of water mass properties below the main thermocline. For the parameter range in which equilibrium solutions exist, a method based on distorted physics partially circumvents this difficulty. The distorted physics compresses the frequency band of the ocean model by slowing down gravity waves and speeding up abyssal processes. The acceleration of abyssal processes is accomplished by decreasing the local heat capacity without altering the transport and mixing of heat. Numerical integration of the distorted-physics ocean model then converges to equilibrium nearly a...