Characteristics of Diurnal Pulses Observed in Typhoon Atsani Using Retrieved Cloud Property Data
Characteristics of Diurnal Pulses Observed in Typhoon Atsani Using Retrieved Cloud Property Data
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DOI：
10.2151/sola.2019-025
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发表时间：
2019
期刊：
影响因子：
1.9
通讯作者：
Xinyue Wang;H. Iwabuchi;N. Takahashi
中科院分区：
文献类型：
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作者：
Xinyue Wang;H. Iwabuchi;N. Takahashi
利用Himawari-8卫星反演的多种云特征，结合最佳路径风暴中心信息，对2015年超级台风“阿特萨尼”（T1516）的热带气旋日脉冲的时空特征进行了相干描述。为了演示从一种云类型到另一种云类型的周日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（OHC），卷层云（Cs）和卷云（Ci）。在风暴中心区域内，云顶高度（CTH）有两个交替出现的峰值，它们对应的向外脉冲被识别出来。第一个脉冲持续24小时，从0500−0700当地太阳时（LST）开始，逐渐从OHC过渡到Cs，然后在0400 LST左右结束于Ci。第二个脉冲持续半天，并限制在风暴中心1000公里范围内。当第一个CTH脉冲在OHC、Cs和Ci结束时，它们的云覆盖率和大光学厚度向外扩展也相应达到最大值。（引用：Wang，X.，H. Iwabuchi和N. Takahashi，2019：使用检索的云属性数据在台风Atsani中观察到的昼夜脉冲特征。SOLA，15，137−142，doi：10.2151/ sola.2019-025.）
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. (Citation: Wang, X., H. Iwabuchi, and N. Takahashi, 2019: Characteristics of diurnal pulses observed in Typhoon Atsani using retrieved cloud property data. SOLA, 15, 137−142, doi:10.2151/ sola.2019-025.)