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首页> 外文学位 >Upper ocean upwelling, temperature, and zonal momentum analyses in the western equatorial Pacific.
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Upper ocean upwelling, temperature, and zonal momentum analyses in the western equatorial Pacific.

机译：赤道西太平洋上层海洋上升流，温度和纬向动量分析。

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摘要

The air-sea interaction thermodynamics of the western equatorial Pacific, the Earth's largest region of warm SST, is a major component of the global climate system. Along the equator, warm pool thermodynamics and momentum are influenced by equatorial ocean visco-inertial boundary layer dynamics that occur within a few degrees of the equator because of the sign reversal of the Coriolis force. Designed to study this system, COARE Enhanced Monitoring Array (EMA) observations of temperature, salinity, velocity, and surface meteorology were centered at 0, 156°E from February 1992 through April 1994. They sampled variability on the equator over larger space/time-scales than the concurrent Intensive Flux Array (IFA) centered at 2°S, 156°E. The EMA data are examined within the context of the larger scale equatorial Pacific and the El Niño conditions that occurred at that time. There is a structural change in the equatorial Pacific near the dateline resulting from the winds that are strong, steady, and easterly in the east and generally weak, punctuated by westerly wind bursts, in the west. East of the dateline the EUC's speed and transport increases downstream, while in the west it tends to be zonally uniform, consistent with the extra-tropical ocean interior water pathways that tend to converge on the equator east of the dateline. At 0°, 156°E in the western Pacific deep, seasonal upwelling (appearing stronger after the peak of the 1991/92 El Niño than during the following weaker El Niño year) occurs within the thermocline in boreal summer with magnitudes as large as upwelling in the eastern Pacific cold tongue. This large upwelling is associated with large downward turbulent heat flux and large turbulent shear stress. While the inferred mixing is quantitatively inconclusive because of unresolved potential errors, it is consistent with the visco-inertial boundary layer concepts from early theory [e.g. Arthur 1960; Robinson 1960; Stommel 1960; and Charney and Spiegel 1971]. These findings suggest that the equatorial thermodynamics differ from those of the IFA. Further process experimentation is necessary to quantify these results.
机译：赤道西太平洋是地球上最大的暖海温区，其海气相互作用热力学是全球气候系统的主要组成部分。沿着赤道，由于科里奥利力的符号反转，赤道海洋黏性-惯性边界层动力学会影响赤道几内以内的温水池热力学和动量。从1992年2月至1994年4月，COARE增强型监测阵列（EMA）对温度，盐度，速度和表面气象学的观测值被定为0、156°E，旨在研究该系统。他们在较大空间/时间上对赤道进行了变异性采样。比同时存在的密集通量阵列（IFA）集中在2°S，156°E。在更大规模的赤道太平洋和当时发生的厄尔尼诺现象的背景下检查了EMA数据。在日线附近的赤道太平洋发生了结构性变化，这是由于东部的强风，稳定和东风，而西部的西风阵风刺穿了大风。在日期线以东，EUC的速度和运输向下游增加，而在西部，它趋向于区域统一，这与趋向于在日期线以东的赤道汇合的热带外海内部水路一致。在西太平洋的0°，156°E深处，季节性上升流（在1991/92厄尔尼诺高峰之后出现，比随后的较弱的厄尔尼诺年份强），发生在北半球夏季的热跃层中，强度和上升趋势一样大。在东太平洋的冷舌。较大的上升流与较大的向下湍流热通量和较大的湍流切应力有关。虽然由于未解决的潜在误差，推断的混合在数量上没有定论，但它与早期理论中的粘惯性边界层概念是一致的[例如亚瑟1960年；罗宾逊1960; Stommel 1960； （Charney and Spiegel 1971）。这些发现表明，赤道热力学不同于IFA。为了量化这些结果，有必要进行进一步的工艺实验。

著录项

  • 作者

    Helber, Robert William.;

  • 作者单位

    University of South Florida.;

  • 授予单位 University of South Florida.;
  • 学科 Physical Oceanography.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 120 p.
  • 总页数 120
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋物理学;
  • 关键词

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