Some Implications of Core Regime Wind Structures in Western North Pacific Tropical Cyclones
Some Implications of Core Regime Wind Structures in Western North Pacific Tropical Cyclones
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DOI：
10.1175/2010waf2222420.1
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发表时间：
2011-02
影响因子：
2.9
通讯作者：
D. Chen;K. Cheung;Cheng-shang Lee
中科院分区：
文献类型：
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作者：
D. Chen;K. Cheung;Cheng-shang Lee
在本研究中，如果1)最大风或最大切向风的半径小于相同强度或相同最大风半径的平均热带气旋的预期半径，以及2)最大风半径外的切向风的减小量大于平均热带气旋的减小值，则认为热带气旋是紧凑的。定义了一个结构参数S来定量衡量热带气旋的致密性。利用QuikSCAT快速散射计(QuikSCAT)海风资料，计算了2000-07年间171个热带气旋的S。然后使用S参数根据33%和67%的百分位数将所有病例分为紧凑型和松散型。结果表明，前期强化阶段有利于紧凑型热带气旋的发生，紧凑型热带气旋快速增强的比例也高于松散型热带气旋。综合红外亮温结果表明，致密热带气旋具有较强的大气环流能力。
Abstract In this study, a tropical cyclone (TC) is considered to be compact if 1) the radius of maximum wind or the maximum tangential wind is smaller than what would be expected for an average tropical cyclone of the same intensity or the same radius of maximum wind, and 2) the decrease of tangential wind outside the radius of maximum wind is greater than that of an average TC. A structure parameter S is defined to provide a quantitative measure of the compactness of tropical cyclones. Quick Scatterometer (QuikSCAT) oceanic winds are used to calculate S for 171 tropical cyclones during 2000–07. The S parameters are then used to classify all of the cases as either compact or incompact according to the 33% and 67% percentiles. It is found that the early intensification stage is favorable for the occurrence of compact tropical cyclones, which also have a higher percentage of rapid intensification than incompact cases. Composite infrared brightness temperature shows that compact tropical cyclones have highly...