Isentropic Analysis on the Intensification of Hurricane Edouard (2014)
Isentropic Analysis on the Intensification of Hurricane Edouard (2014)
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DOI：
10.1175/jas-d-17-0092.1
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发表时间：
2017-12
影响因子：
3.1
通讯作者：
Juan Fang;O. Pauluis;Fuqing Zhang
中科院分区：
文献类型：
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作者：
Juan Fang;O. Pauluis;Fuqing Zhang
摘要本研究采用等熵分析技术来研究实验性实时对流飓风分析和预报系统预测的爱德华飓风（2014年）的增强情况。这种方法将上升的高熵空气团和下沉的低熵空气团的垂直质量输运用等效位温θe分开。结果表明，当Edouard加强时，垂直环流通过向上（向下）质量通量向高（低）θe方向扩展而变宽。在发展初期，非对称对流主导了垂直环流，并导致对流层上层有一个显著的向上质量通量极大中心。当Edouard变得强烈时，轴对称对流对上层垂直质量输送变得重要，而非对称对流仍然主导低层垂直质量输送。眼内暖核的发展导致沿θ方向沿着出现双极大值.
AbstractAn isentropic analysis technique is adopted in this study to investigate the intensification of Hurricane Edouard (2014) predicted by an experimental real-time convection-permitting hurricane analysis and forecast system. This technique separates the vertical mass transport in terms of equivalent potential temperature θe for the rising air parcels at high entropy from the subsiding air at low entropy. It is found that as Edouard intensifies the vertical circulation becomes wider via the expansion of upward (downward) mass flux to higher (lower) θe. In the early developing stages, the asymmetric convection dominates the vertical circulation and leads to a remarkable upward mass flux maximum center in the upper troposphere. When Edouard becomes intense, the axisymmetric convection becomes important to the upper-level vertical mass transport while the asymmetric convection still dominates the low-level vertical mass transport. Development of the warm core in the eye leads to double maxima along the θ...