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首页> 外文期刊>Journal of Physical Oceanography >The Global Zonally Integrated Ocean Circulation, 1992-2006: Seasonal And Decadal Variability
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The Global Zonally Integrated Ocean Circulation, 1992-2006: Seasonal And Decadal Variability

机译：1992-2006年全球区域综合海洋环流：季节和年代际变异

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The zonally integrated meridional and vertical velocities as well as the enthalpy transports and fluxes in a least squares adjusted general circulation model are used to estimate the top-to-bottom oceanic meridional overturning circulation (MOC) and its variability from 1992 to 2006. A variety of simple theories all produce time scales suggesting that the mid- and high-latitude oceans should respond to atmospheric driving only over several decades. In practice, little change is seen in the MOC and associated heat transport except very close to the sea surface, at depth near the equator, and in parts of the Southern Ocean. Variability in meridional transports in both volume and enthalpy is dominated by the annual cycle and secondarily by the semiannual cycle, particularly in the Southern Ocean. On time scales longer than a year, the solution exhibits small trends with complicated global spatial patterns. Apart from a net uptake of heat from the atmosphere (forced by the NCEP-NCAR reanalysis, which produces net ocean heating), the origins of the meridional transport trends are not distinguishable and are likely a combination of model disequilibrium, shifts in the observing system, other trends (real or artificial) in the meteorological fields, and/or true oceanic secularities. None of the results, however, supports an inference of oceanic circulation shifts taking the system out of the range in which changes are more than small perturbations. That the oceanic observations do not conflict with an apparent excess heat uptake from the atmosphere implies a continued undersampling of the global ocean, even in the upper layers.
机译：利用经最小二乘法调整的一般环流模型的纬向经纬线积分速度和焓输运量和通量，来估算1992年至2006年从上到下的海洋子午翻转环流（MOC）及其变化。所有简单的理论都产生了时间尺度，这表明中高纬度海洋仅应在几十年内对大气驱动做出响应。在实践中，除了非常靠近海面，在赤道附近和南大洋部分地区，MOC和相关的热传输几乎没有变化。子午输运量和焓的变化主要由年度周期决定，其次由半年周期决定，特别是在南大洋。在超过一年的时间尺度上，该解决方案显示出具有复杂的全球空间格局的小趋势。除了从大气中净吸收热量（由NCEP-NCAR再分析强迫，它产生净海洋热量）外，子午输运趋势的起源也无法区分，可能是模型不平衡，观测系统变化的组合，气象领域的其他趋势（真实或人为）和/或真实的海洋世俗化。然而，没有任何结果支持海洋环流变化的推断，从而使系统超出了变化不仅仅在于微小扰动的范围。海洋观测结果与大气中明显的热量吸收没有冲突，这意味着全球海洋的采样持续减少，即使在高层也是如此。

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