The Track Integrated Kinetic Energy of Atlantic Tropical Cyclones
The Track Integrated Kinetic Energy of Atlantic Tropical Cyclones
复制标题
大西洋热带气旋的积分动能追踪
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Powell
中科院分区：
文献类型：
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作者：
V. Misra;S. Dinapoli;M. Powell
本文介绍了路径积分动能（TIKE）的概念，并将其应用于大西洋热带气旋活动的季节变化。它的概念类似于更常用的累积气旋能量（ACE），但重要的区别是，TIKE中的积分动能（IKE）是在大西洋热带气旋的生命周期内累积的。然而，IKE是通过逐象限积分热带强度或更高强度的10米级持续风的体积来计算的，而ACE只使用最大持续风，而不考虑风暴的结构。实际上，TIKE可以解释热带气旋的强度、持续时间和大小。在这项研究中，作者研究了1990年至2011年22年间季节性大西洋TIKE的季节性和年际变化。结果表明，大西洋TIKE在9月达到气候峰值，热带大西洋东部地区TIKE最大的风暴频率最高。大西洋TIKE的年际变化表明，它可能受到赤道太平洋和大西洋海温变化的影响。赤道中太平洋海温与同期（6 ~ 11月）季节性TIKE呈负相关，大西洋暖池大小与季节性TIKE呈正相关。
In this paper the concept of track integrated kinetic energy (TIKE) is introduced as a measure of seasonal Atlantic tropical cyclone activity and applied to seasonal variability in the Atlantic. It is similar in concept to the more commonly used accumulated cyclone energy (ACE) with an important difference that in TIKE the integrated kinetic energy (IKE) is accumulated for the life span of the Atlantic tropical cyclone. The IKE is, however, computed by volume integrating the 10-m level sustained winds of tropical strength or higher quadrant by quadrant, while ACE uses the maximum sustained winds only without accounting for the structure of the storm. In effect TIKE accounts for the intensity, duration, and size of the tropical cyclones. In this research, the authors have examined the seasonality and the interannual variations of the seasonal Atlantic TIKE over a period of 22yr from 1990 to 2011. It is found that the Atlantic TIKE climatologically peaks in the month of Septemberand the frequency of storms with the largest TIKE are highest in the eastern tropical Atlantic. The interannual variations of the Atlantic TIKE reveal that it is likely influenced by SST variations in the equatorial Pacific and in the Atlantic Oceans. The SST variations in the central equatorial Pacificarenegativelycorrelated withthe contemporaneousseasonal(June‐November)TIKE.Thesizeofthe Atlantic warm pool (AWP) is positively correlated with seasonal TIKE.