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首页> 外文期刊>Oceanographic Literature Review >Characteristics of Coastal Low-Level Jets Over Beibu Gulf, China, During the Early Warm Season
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Characteristics of Coastal Low-Level Jets Over Beibu Gulf, China, During the Early Warm Season

机译：中国北部海湾沿海低级喷气机的特点，在中国北部湾，在早期温暖季节

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摘要

We investigated coastal low-level jets (CLLJs) over Beibu Gulf, China, during the warm season (May to July) using hourly model simulations from a mesoscale weather research and forecasting model with a 9-km horizontal resolution. Two high-incidence CLLJ areas were identified over Beibu Gulf: one located on the leeward side of the Annamite Range that prevailed after sunset and the second off the northwestern coast of Hainan Island that reached its maximum intensity at midnight. The upstream wind of the Annamite Range was too weak to pass over the range during the daytime due to strong turbulent mixing near the land surface of Indochina; however, due to the suppression of the turbulent mixing after sunset, the flow intensified and crossed over the Annamite Range and further formed a hydraulic jump jet downstream. In addition to advection effect from upstream, topographic blocking effect of Hainan Island contributed to the CLLJ off the northwestern coast of Hainan Island, which persisted during the day but became more prevalent at midnight. Further momentum budget analysis and sensitivity experiments indicated that the upstream inertial oscillation due to the diurnal variation in turbulence over land was the primary source of the CLLJ over the ocean. These findings reveal the primary mechanism of CLLJs over Beibu Gulf, providing insight into CLLJ formation in other coastal regions with complex mountain ranges.
机译：我们在温暖的季节（5月至7月）在北部海湾（5月）使用MeSoscale天气研究和预测模型的温暖季节（5月至7月）来调查沿海低级喷气式飞机（CLLJS）。在Beibu Gulf上发现了两种高发率CLLJ领域：一个位于安纳尼亚人的Leeward侧的一个人，在日落之后盛行，海南岛西北海岸的第二次占据了最大的强度。由于印度印第安纳的土地面附近，纳米岩系列的上游风在白天期间，在白天期间的范围太弱;然而，由于日落后抑制了湍流混合，流动在安富钻区系列中加剧和交叉，并进一步形成了下游的液压跳跃喷射。除了从上游的平流效果外，海南岛的地形阻挡效果还致力于海南岛西北海岸的Cllj，这在白天持续存在，但在午夜变得更加普遍。进一步的动量预算分析和敏感性实验表明，由于土地上的湍流变化导致的上游惯性振荡是海洋上的CLLJ的主要来源。这些发现揭示了CLLJS对北部海湾的主要机制，在其他沿海地区的其他沿海地区提供了对CLLJ形成的洞察力。

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  • 来源
    《Oceanographic Literature Review》 |2020年第9期|1883-1883|共1页
  • 作者

    H. Kong; O. Zhang; Y. Du; F. Zhang;

  • 作者单位

    School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat- sen University Guangzhou China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

    School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat- sen University Guangzhou China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

    School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat- sen University Guangzhou China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

    School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat- sen University Guangzhou China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

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