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Evaluation of the ocean feedback on height characteristics of the tropical cyclone boundary layer
  • ISSN号:0894-0525
  • 期刊名称:Acta Meteorologica Sinica
  • 时间:2013.12
  • 页码:910-922
  • 分类:P434[天文地球—大气科学及气象学] TG806[金属学及工艺—公差测量技术]
  • 作者机构:[1]College of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101
  • 相关基金:Supported by the China Meteorological Administration Special Public Welfare Research Fund (GYHY201106004); National Natural Science Foundation of China (41230421,41005029,and 41105065)
  • 相关项目:中纬度斜压环流背景下的台风初始化方法研究
中文摘要:

在这研究,在热带气旋(TC ) 和内在的海洋之间的相互作用被使用 a coupled 空气海洋模型复制。基于模拟结果, TC 边界层深度的特征以三个通常使用的定义被调查,即,混合的层深度(HVTH ) 的高度,最大的正切的风(HTAN ) 的高度,和流入层深度(HRAD ) 。边界层的对称的高度被显示被海洋反应砍倒,与比 HTAN 和 HRAD 的稍微小的 HVTH 的减少。海洋反馈也在边界层深度的不对称的特征导致明显的变化。在 TC 的正确尾部的 HVTH 显著地由于寒冷的存在被减少醒来,当在另外的区域的 HVTH 的变化是相当小的时。减少的表面由寒冷的虚拟潜在的温度醒来被识别在在 HVTH 的不对称的变化主导。HTAN 的不对称的分布上的海洋反应的影响是尽管如此不不同,它被归因于高度正切的风的 axisymmetric 性质。HRAD 拥有显著不对称的特征和流入层不在所有区域存在,定义的机能不全的一个指示基于对称的流入层深度。在寒冷的影响下面醒来,山峰流入区域清楚地逆时针方向旋转。作为后果, HRAD 在东方深处变得当时在 TC 的西方更浅。

英文摘要:

In this study, the interaction between the tropical cyclone(TC) and the underlying ocean is reproduced by using a coupled atmosphere-ocean model. Based on the simulation results, characteristics of the TC boundary layer depth are investigated in terms of three commonly used definitions, i.e., the height of the mixed layer depth(HVTH), the height of the maximum tangential winds(HTAN), and the inflow layer depth(HRAD). The symmetric height of the boundary layer is shown to be cut down by the ocean response, with the decrease of HVTH slightly smaller than that of HTAN and HRAD. The ocean feedback also leads to evident changes in asymmetric features of the boundary layer depth. The HVTH in the right rear of the TC is significantly diminished due to presence of the cold wake, while the changes of HVTH in other regions are rather small. The decreased surface virtual potential temperature by the cold wake is identified to be dominant in the asymmetric changes in HVTH. The impacts of ocean response on the asymmetric distributions of HTAN are nonetheless not distinct, which is attributed to the highly axisymmetric property of tangential winds. The HRAD possesses remarkable asymmetric features and the inflow layer does not exist in all regions, an indication of the inadequacy of the definition based on symmetric inflow layer depth. Under influences of the cold wake, the peak inflow area rotates counterclockwise distinctly. As a consequence, the HRAD becomes deeper in the east while shallower in the west of the TC.

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