Relationship between Tropical Cyclone Intensification and Cloud-Top Outflow Revealed by Upper-Tropospheric Atmospheric Motion Vectors
Relationship between Tropical Cyclone Intensification and Cloud-Top Outflow Revealed by Upper-Tropospheric Atmospheric Motion Vectors
复制标题
对流层上层大气运动矢量揭示的热带气旋增强与云顶流出之间的关系
DOI：
10.1175/jamc-d-17-0058.1
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发表时间：
2017
影响因子：
3
通讯作者：
R. Oyama
中科院分区：
文献类型：
--
作者：
R. Oyama
最近的技术进步使时间密集的地球同步卫星观测成为可能，使大气运动矢量（AMVs）的推导，适合捕捉大气流动，即使是中尺度现象，在现场数据是稀缺的。利用多功能交通卫星（MTSAT）连续云图的AMV计算了2011- 2014年44个热带气旋（TC）云顶附近的外流，并分析了TC增强率（定义为过去24 h最佳路径最大持续风的变化）与外流的关系。在TC加强阶段，流出的时间变化一般是同步的变化，由MTSAT红外波段检测到的TC内核对流云的云顶温度。值得注意的是，66%的TC在流出最大化后0-36 h达到峰值，且强度随时间的延长而增加。
AbstractThe temporally dense geostationary satellite observations made possible by recent technological advances enable atmospheric motion vectors (AMVs) to be derived that are suitable for capturing atmospheric flows even of mesoscale phenomena, for which in situ data are scarce. Tropical cyclone (TC) outflows around the cloud top, reflecting TC secondary circulation, were computed by using AMVs derived from successive Multifunctional Transport Satellite (MTSAT) imagery, and the relationship between TC intensification rate (defined as the change of the best-track maximum sustained wind in the previous 24 h) and the outflow was investigated for 44 TCs occurring during 2011–14. During the TC intensification phase, temporal changes in the outflow were generally synchronous with changes in the cloud-top temperature of TC inner-core convective clouds detected by MTSAT infrared band. It was noteworthy that the intensification rates of 66% of the TCs peaked 0–36 h after outflow maximization and that the intensi...
影响因子：
3.1
作者：
H. Fudeyasu;Yuqing Wang
通讯作者：
H. Fudeyasu;Yuqing Wang