海浪混合作用对热带海洋海表面温度模拟的影响*

doi:10.11978/2016129

摘要/Abstract

摘要：

赤道太平洋冷舌模拟偏低且过于西伸是一个共性问题。基于特征波参数化理论, 利用美国国家环境预报中心(National Centers for Environmental Prediction, NCEP)再分析风场驱动海浪模式WAVEWATCH Ⅲ模拟所得的有效波高、波周期、波长等海浪要素, 计算出海浪混合作用引起的垂直涡动动量系数和热混合系数, 将其引入到SBPOM(Stony Brook Parallel Ocean Model)环流模式的动量控制方程中, 由此探究海浪混合作用对热带海洋海表面温度模拟的影响。初步数值模拟研究结果表明, 海浪混合作用的考虑, 有效地改进了环流模式模拟热带海洋海表面温度偏低和赤道冷舌偏冷且过于西伸的现象, 使得环流模式对热带海洋的模拟效果更好。

关键词: 海浪混合, WAVEWATCH Ⅲ, SBPOM, 赤道冷舌, 海表面温度

Abstract:

One of common problems of climate models is that the simulated sea surface temperature (SST) deviates noticeably from the observation in the tropics, such as the equatorial cold tongue in the eastern Pacific. Based on the theory of the parameterization of feature waves, the National Centers for Environmental Prediction (NCEP) reanalysis wind data were used to drive the WAVEWATCH Ⅲ to simulate the process of ocean waves in the tropics, and significant wave height, wave period and wavelength can be obtained. These wave parameters were used to calculate the vertical vortex momentum coefficient and thermal mixing coefficient, which were introduced to the controlling equation of SBPOM (Stony Brook Parallel Ocean Model), and to explore the effects of non-breaking surface wave-induced vertical mixing on the SST simulation in the tropics. The simulation results showed that by considering the non-breaking surface wave-induced vertical mixing, the simulated SST in the tropics and the equatorial Pacific cold tongue were improved effectively, and the accuracy of simulated SST in the tropics has been enhanced.

Key words: wave-induced vertical mixing, WAVEWATCH Ⅲ, SBPOM, the equatorial Pacific cold tongue, sea surface temperature

中图分类号:

P731.2

刘子龙, 史剑, 蒋国荣, 肖林. 海浪混合作用对热带海洋海表面温度模拟的影响*[J]. 热带海洋学报, 2017, 36(4): 77-86.

Zilong LIU, Jian SHI, Guorong JIANG, Lin XIAO. Response of tropical SST to non-breaking surface wave-induced vertical mixing in a climate model[J]. Journal of Tropical Oceanography, 2017, 36(4): 77-86.

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浮标站号	均方根相对误差/%				相关系数
浮标站号	2月	5月	8月	11月	2月	5月	8月	11月
41041	18.69	18.02	23.45	20.51	0.88	0.92	0.86	0.89
41043	17.97	18.03	14.04	17.48	0.90	0.91	0.87	0.85
51003	24.56	23.73	18.17	20.20	0.84	0.78	0.81	0.80
51101	21.76	19.89	NaN	20.02	0.88	0.87	NaN	0.82
52202	20.29	23.84	21.18	21.40	0.89	0.86	0.90	0.84
52211	23.79	20.52	22.67	NaN	0.83	0.83	0.85	NaN
样本数N	672	744	744	720	672	744	744	720
平均	21.18	20.67	19.90	19.92	0.87	0.86	0.86	0.84

时间			偏度/m	均方根相对误差/%	相关系数
02-28 18时	1.809	1.871	0.062	16.38	0.923
05-30 18时	1.817	2.017	0.200	15.52	0.943
08-30 18时	1.773	1.823	0.050	13.32	0.927
11-30 18时	1.820	1.926	0.126	17.53	0.903
平均	1.805	1.909	0.104	15.69	0.924