Modes of atmospheric variability over the Southern Ocean
Modes of atmospheric variability over the Southern Ocean
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DOI：
10.1029/2000jc000542
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发表时间：
2003-04
影响因子：
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通讯作者：
I. Simmonds
中科院分区：
文献类型：
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作者：
I. Simmonds
[1]南大洋(SO)上空的大气历来很少被观测到。直到最近，人们对重要参数的气候意义还知之甚少。在现代，新的数据来源，特别是来自遥感的广泛产品，缓解了这一问题。除了这些发展外，“数据同化”的出现和“再分析”的进行现在意味着，现有数据可能会以“最佳”方式使用，以获得迄今无法获得的质量的气象分析。这一坚实的基础意味着，我们现在第一次能够自信地记录和了解该区域丰富多样的多变模式。在这篇文章中，我们研究了SO大气变率的一些方面，特别是与国家环境预测中心(NCEP)40年再分析中的平均海平面气压(MSLP)相关的那些。讨论致力于海洋气旋系统行为的许多方面，以及在这些方面所显示的变化和趋势。本文还探讨了与高纬度模式、半年振荡(SAO)和南极绕极波(ACW)有关的变化。广泛的物理过程驱动了这些功能及其可变性，我们在这里研究其中的一些。
[1] The atmosphere over the Southern Ocean (SO) has been historically very poorly observed. Until fairly recently, the climate means of important parameters were known only imperfectly. In the modern era, new sources of data, particularly a wide range of products to come from remote sensing, have alleviated this problem. In addition to these developments, the advent of “data assimilation” and the conduct of “reanalyses” now means that available data may be used in “optimal” ways to obtain meteorological analyses of a quality not available heretofore. This solid base means that we are now for the first time able to confidently document and understand the rich variety of modes of variability over the region. In this paper, we examine aspects of SO atmospheric variability and focus particularly on those associated with the mean sea level pressure (MSLP) in the 40-year National Centers for Environmental Prediction (NCEP) reanalysis. Discussion is devoted to many aspects of the behavior of cyclonic systems over the Ocean and the variabilities and trends shown in these. Of the variabilities also explored here are those associated with the high-latitude mode, the semiannual oscillation (SAO), and the Antarctic circumpolar wave (ACW). A wide range of physical processes drives these features and their variability and we investigate some of these here.