内核及外围尺度对热带气旋强度影响的数值试验
Numerical simulation on how the inner core and outer size of tropical cyclones influence the intensity
-
摘要: 采用WRF数值模式模拟并对热带气旋尺度与强度关系进行了探讨,且初步诊断分析了内核及外围尺度对热带气旋强度影响的可能机制,结果表明:(1)内核区较大时的缩放引起角速度变化是其影响热带气旋强度的机制之一;(2)内核区较小时的进一步收缩引起的眼区次级环流破坏是其影响热带气旋强度的一种机制;(3)外围尺度变化造成低层上升至高层的水汽总量变化,是其影响热带气旋强度的一种机制;另一方面,外围尺度发生变化使得低层气流向热带气旋内的辐合减少,亦是其影响热带气旋强度的机制之一。Abstract: Via WRF numerical simulation experiments,this paper discusses the relationship between tropical cyclone(TC) size and intensity,and diagnose the possible mechanism of how TC inner core and outer size influence TC intensity. Results show that: (1) while TC has large inner core,the balance of angular momentum explains that why changing of inner core will course TC intensifying or weakening. (2) While TC has small inner core,the reason why zoom out(zoom in)of inner core leads to TC weakening (intensifying) might be the damage of secondary circulation. (3) the changing of humidity supply and convergence area in low level may be the mechanism for that outer size increment(decrease) helps TC intensifying(weakening).
-
Key words:
- tropical cyclone /
- size /
- intensity /
- numerical simulation
-
端义宏,余晖,伍荣生.热带气旋强度变化研究进展[J].气象学报,2005,63(50):636-645. Duan Yihong,Yu Hui,Wu Rongsheng. Review of the research in the intensity change of tropical cyclone[J]. Acta Meteorologica Sinica,2005,63(50):636-645. 陈光华,裘国庆. 热带气旋强度与结构研究新进展[J].气象科技,2005,33(1):1-6. Chen Guanghua,Qiu Guoqing. PAGESS progress in researches on tropical cyclone intensity and structure[J]. Meteorological Science and Technology,2005,33(1):1-6. Holland G T,Merrill R T. On the dynamics of tropical cyclone structural changes[J]. Quart J R Met Soc,1984,110:723-745. Willoughby H E,Clos J A,Shoreibah M G. Concent ric eyewalls secondary wind maxima and the evolution of the hurricane vortex[J].J Atmos Sci,1982,39:395-411. Willoughby H E. Temporal changes of the primary circulation in tropical cyclones[J]. J Atmos Sci,1990,47: 242-264 Houze R A,Chen S S,Smull B F,et al. Hurricane intensity and eyewall replacement[J]. Science,2007,315:1235-1239. Kossin J P,Sitkowski M. An objective model for identifying secondary eyewall formation in hurricanes[J]. Mon Wea Rev,2009,137: 876-892. Wu Lianyao,Lei Xiaotu. Preliminary research on the inner core and outer size of tropical cyclones and its relationship with the intensity of tropical cyclones[J]. J Trop Meteorol,2014,20(4): 66-73. 吴联要,雷小途. 内核及外围尺度与热带气旋强度关系的初步研究[J].热带气象学报,2012,28(5):719-725. Wu Lianyao,Lei Xiaotu. Preliminary research on the size of inner core and periphery and their relationship with the intensity of tropical cyclones[J]. Journal of Tropical Meteorology,2012,28(5):719-725. 朱乾根,林锦瑞,寿绍文,等. 天气学原理和方法[M]. 北京:气象出版社,2000:514-539. Zhu Qiangen,Lin Jinrui,Shou Shaowen,et al. Principles and methods of synoptic meteorology[M]. Beijing: China Meteorological Press,2000: 514-539. Willoughby H E. The dynamics of the tropical cyclone core[J]. Aust Met Mag,1988,36:183-191. 陈联寿,丁一汇. 西北太平洋台风概论[M]. 北京: 科学出版社,1979: 16-199. Chen Lianshou,Ding Yihui. Introduction to the Northwest Pacific Typhoon[M]. Beijing:Science Press,1979: 16-199.
点击查看大图
计量
- 文章访问数: 1053
- HTML全文浏览量: 2
- PDF下载量: 1062
- 被引次数: 0