Different effects of latent heat in planetary boundary layer and cloud microphysical processes on Typhoon Sarika (2016)
Different effects of latent heat in planetary boundary layer and cloud microphysical processes on Typhoon Sarika (2016)
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DOI：
10.15233/gfz.2020.37.4
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发表时间：
2020-07
期刊：
影响因子：
1
通讯作者：
Jiangnan Li;Youlong Chen;Wenshi Lin;Fangzhou Li;Chenghui Ding
中科院分区：
文献类型：
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作者：
Jiangnan Li;Youlong Chen;Wenshi Lin;Fangzhou Li;Chenghui Ding
利用WRF模型对台风“萨里卡”（2016）进行了3次模拟实验，研究了行星边界层潜热和云微物理过程对台风的不同影响。对照实验很好地模拟了TC轨迹和强度的变化。行星边界层或云微物理过程中的潜热会影响TC的轨迹和移动速度。潜热通过影响TC结构来影响TC强度。与CTL实验相比，NBL实验和NMP实验均表现出TC的动力学和热力学特性减弱。没有潜热的作用，热带气旋无法向上发展，强度减弱，降水量减少；这种减弱效应在关闭行星边界层潜热的情况下显得更为明显。行星边界层潜热主要影响TC初始阶段的产生和发展，而云微物理过程中的潜热则有利于TC成熟阶段的强化和维持。 TC核心区云微物理过程的潜热能比表面热函大一个数量级。但云微物理过程的潜热释放并不是TC增强的最关键因素，边界层过程的能量传递更为重要。
Three simulation experiments were conducted on Typhoon (TC) “Sarika” (2016) using the WRF model, different effects of the latent heat in planetary boundary layer and cloud microphysical process on the TC were investigated. The control experiment well simulated the changes in TC track and intensity. The latent heat in planetary boundary layer or cloud microphysics process can affect the TC track and moving speed. Latent heat affects the TC strength by affecting the TC structure. Compared with the CTL experiment, both the NBL experiment and the NMP experiment show weakening in dynamics and thermodynamics characteristics of TC. Without the effect of latent heat, the TC cannot develop upwards and thus weakens in its intensity and reduces in precipitation; this weakening effect appears to be more obvious in the case of closing the latent heat in planetary boundary layer. The latent heat in planetary boundary layer mainly influences the generation and development of TC during the beginning stage, whereas the latent heat in cloud microphysical process is conducive to the strengthen and maintenance of TC in the mature stage. The latent heat energy of the cloud microphysical process in the TC core region is an order of magnitude larger than the surface enthalpy. But the latent heat release of cloud microphysical processes is not the most critical factor for TC enhancement, while the energy transfer of boundary layer processes is more important.