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Characteristics of Diurnal Pulses Observed in Typhoon Atsani Using Retrieved Cloud Property Data

机译:使用检索到的云属性数据在台风atsani中观察到昼夜脉冲的特征

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Using several cloud properties retrieved from the Himawari-8 satellite, combined with the best track storm center information, the temporal-spatial features of tropical cyclone (TC) diurnal pulses in 2015 Super Typhoon Atsani (T1516) are coherently depicted. To demonstrate the radially outward transition processes of the diurnal pulses from one cloud type to another, we divided high clouds into three types: opaque high cloud (OHC), cirrostratus (Cs), and cirrus (Ci). Two alternatively appeared peaks in cloud top height (CTH) within the storm central area and their corresponding outward pulses are identified. The first pulse covers a 24-hour period, it starts at ~0500-0700 local solar time (LST), with a gradual transition from OHC to Cs, then ends in Ci at around 0400 LST. The second pulse lasts for half a day and limited within 1000 km from the storm center. When the first CTH pulse ends in OHC, Cs, and Ci, their cloud fractional coverage and the outward expansion of large cloud optical thickness also reach maximum accordingly.
机译:使用从Himawari-8卫星检索的几个云属性,与最佳的轨道风暴中心信息相结合,2015年的热带气旋(TC)昼夜脉冲的时间 - 空间特征是超级台风atsani(T1516)的差异。为了证明从一个云类型到另一个云类型的昼夜脉冲的径向向外过渡过程,我们将高云分为三种类型:不透明高云(OCC),Cirrostratus(CS)和螺旋(CI)。识别云顶部高度(CTH)中的两个可选择出现的峰值,并识别它们对应的向外脉冲。第一脉冲覆盖24小时的时间,它开始于〜0500-0700本地太阳时间(LST),从OCC到CS逐渐过渡,然后在0400 LST左右结束CI。第二个脉冲持续半天,距离风暴中心1000公里范围内。当第一个CTH脉冲以OHC,CS和CI结束时,它们的云分数覆盖和大云光学厚度的向外膨胀也相应地达到最大值。

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