Energy dispersion of complex non-isolated vortices

• Published in: Chinese science bulletin Vol. 56; no. 25; pp. 2713 - 2717
• Main Author: Luo, ZheXian
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.09.2011; SP Science China Press
• Subjects: Chemistry/Food Science; disasters; Earth Sciences; energy; Engineering; Humanities and Social Sciences; hurricanes; Life Sciences; multidisciplinary; Physics; rain; Science; Science (multidisciplinary); typhoons; 中尺度涡; 傅立叶变换; 台风预报; 旋涡; 结构模式; 能量色散; 非线性关系; 非隔离式; energy dispersion; tropical cyclone (TC); vortex; wave train; complex structural pattern
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-011-4629-2

Energy dispersion is a fundamental scientific problem in the study of natural disasters such as typhoons, heavy rain and earth-quakes. The problem has been addressed by both multi-discipline research and forecast studies. The dynamics of isolated circular vortex energy dispersion have been solved. However, the disastrous results of typhoons and heavy rain often occur due to non-isolated circular vortices, the dynamics of which are explored in this paper. The energy dispersion characteristics of non-isolated vortices with complex structural patterns are examined using a linearized nondivergent barotropical vorticity equa- tion model. In the initial field, a tropical cyclone （TC） vortex and a meso-scale vortex coexist, forming a complex structural pat- tern. An analytic solution based on a Fourier transform and simulations using a two-dimensional model show the following. （1） A wave train of TC-G-D may be created by the energy dispersion where the line connecting the three member centers of the wave train is parallel to the x axis in the case of an initial TC vortex without a meso-scale vortex. （2） A wave train of TC-G-D may also be created by energy dispersion. However, the line connecting the three member centers of the wave train would no longer be parallel to the x axis. Instead, they would form a triangle in the presence of the initial TC vortex with the meso-scale vortex. （3） There is a nonlinear relationship between the initial intensity of the meso-scale vortex and the base angle of the triangle. These results have the potential to be applied in the field of typhoon forecasting.