An improvement of the too cold tongue in the tropical Pacific with the development of an ocean-wave-atmosphere coupled numerical model  

作　　者：Song Zhenya Qiao Fangli Yang Yongzeng Yuan Yeli 

机构地区：[1]The First Institute of Oceanography, SOA, Qingdao 266061, China

出　　处：《Progress in Natural Science:Materials International》2007年第5期576-583,共8页自然科学进展·国际材料（英文版）

基　　金：Supported by National Natural Science Foundation of China (Grant No. 40476017);the National Key Basic Research Projects (2006CB403605)

摘　　要：A common problem in the application of the coupled ocean-atmosphere general circulation models （CGCMs） without flux correction is that the simulated equatorial cold tongue in general tends to be too strong, narrow, and extending too far west. The causes are not well understood yet. One possible reason may be the simulated mixed layer depth （MLD） is too shallow in the tropical Pacific due to insufficient vertical mixing in the OGCM. It is believed that the wave-induced vertical mixing can greatly improve the simulation of the MLD and thermocline structure. In this study, the coupled ocean-atmosphere general circulation model （FGCM-0） incorporated with wave-induced mixing has been employed to simulate the tropical Pacific sea surface temperature （SST）. Generally, the Wave-induced mixing lowers the SST in the OGCM because the strengthened vertical mixing can bring more cold water upward. However, in the coupled model, the non-uniformity of the space distribution in SST drop generates a horizontal gradient of the sea surface air pressure, and thus yields surface wind field anomaly. The wind anomaly leads to both ocean surface circulation anomaly and downwelling anomaly, which can restrain the overly-westward extension of the cold tongue in the tropical Pacific. Compared with the model results from the original model （FGCM-0）, the modeled SST is higher by more than 0.8℃, with a maximum of 1.2＂C in the western Pacific （160-180°E, 0-3°N）. The eastern boundary of the isotherm of 26.0℃ also moves from 165°E to 180°E. The overly westward extension of the simulated equatorial cold tongue is suppressed with the incorporation of the wave-induced mixing in the coupled model. The simulated SST shows in general improved results with a maximum improvement of more than 1.0＊C. The simulated SST improvement in the north tropical Pacific is much better than that of the south tropical Pacific.在没有流动修正的联合海洋空气将军发行量模型(CGCM ) 的申请的一个普通问题是模仿的赤道的冷舌头一般来说趋于太强壮，狭窄，并且向西延长太远。原因还很好没被理解。一个可能的原因可以是模仿的混合的层深度(MLD ) 由于在 OGCM 的不够的垂直混合在热带太平洋是太浅的。导致波浪的垂直混合罐头极大地改进 MLD 和 thermocline 结构的模拟，这被相信。在这研究，与导致波浪的混合合并的联合海洋空气将军发行量模特儿(FGCM-0 ) 被雇用了模仿热带和平的海表面温度(SST ) 。通常，因为，导致波浪的混合在 OGCM 降低 SST 加强的垂直混合能向上带更多的冷水。在联合模型，然而，在 SST 落下的空间分发的不一致产生海表面空气压力的一个水平坡度，并且因此产出表面风领域异例。风异例导致两个海洋表面发行量异例，并且在能制止的 welling 异例下面过分向西在热带太平洋的冷舌头的扩展。与从原来的模型(FGCM-0 ) 的模型结果相比，建模的 SST 由超过 0.8 ° C 是更高的，与在西方的太平洋的 1.2 ° C 的最大值(160-180 ° E， 0-3 ° N ) 。26.0 ° C 的等温线的东方边界也从 165 ° E 搬到 180 ° E。过分，向西，模仿的赤道的冷舌头的扩展与在联合模型的导致波浪的混合的加入被压制。模仿的 SST 表演一般来说与超过 1 的最大的改进改进了结果。0 ° C。在向北热带的太平洋的模仿的 SST 改进比向南热带的太平洋的好一些。

关 键 词：cold tongue wave-induced mixing the coupled ocean-atmosphere general circulation models the tropical Pacific 

分 类 号：P732.3[天文地球—海洋科学]