On the incompatibility of ocean and atmosphere models and the need for flux adjustments
On the incompatibility of ocean and atmosphere models and the need for flux adjustments
复制标题
论海洋和大气模型的不兼容性以及通量调整的必要性
DOI：
10.1007/bf00211615
复制
发表时间：
1996
期刊：
影响因子：
4.6
通讯作者：
T. M. Hughes
中科院分区：
文献类型：
--
作者：
A. Weaver;T. M. Hughes
检查平衡海洋（OGCM）和大气（AGCM）大气环流模型气候的地表热量和淡水通量，以确定防止耦合时气候漂移所需的最小通量调整。这是通过将 OGCM 与指定的表面通量集成来实现的。结果表明，除非使用海洋经向热量和淡水（盐）输送作为调整 AGCM 当前气候学的约束，否则耦合系统的剧烈气候漂移是不可避免的。进一步表明，OGCM 和 AGCM 通量之间的不匹配程度对于气候漂移的影响并不像 OGCM 和隐含的 AGCM 经向热量和淡水（盐）输送的差异那么重要。因此，提出了最小通量调整，该调整在每个流域内是地带性的，并且与目前的通量调整相比幅度较小。此最小通量调整仅用于校正 AGCM 隐含的热量和淡水（盐）海洋经向传输。当使用最小通量调整时，还建议稍微扩展以克服地表水的漂移。最后，表明用于确定它们的当前方法所产生的通量调整都非常相似，导致大区域的调整场明显大于 AGCM 和气候场。
The surface heat and freshwater fluxes from equilibrium ocean (OGCM) and atmospheric (AGCM) general circulation model climates are examined in order to determine the minimum flux adjustment required to prevent climate drift upon coupling. This is accomplished by integrating an OGCM with specified surface fluxes. It is shown that a dramatic climate drift of the coupled system is inevitable unless ocean meridional heat and freshwater (salt) transports are used as constraints for tuning the AGCM present-day climatology. It is further shown that the magnitude of the mismatch between OGCM and AGCM fluxes is not as important for climate drift as the difference in OGCM and implied AGCM meridional heat and freshwater (salt) transports. Hence aminimum flux adjustmentis proposed, which is zonally-uniform in each basin and of small magnitude compared to present flux adjustments. This minimum flux adjustment acts only to correct the AGCM implied oceanic meridional transports of heat and freshwater (salt). A slight extension is also proposed to overcome the drift in the surface waters when the minimum flux adjustment is used. Finally, it is suggested that the flux adjustments which arise from current methods used to determine them are all very similar, leading to adjustment fields which are significantly larger than both AGCM and climatological fields over large regions.