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The cyclone disturbance in tropical lower atmosphere is the necessary condition of typhoon forming. Satellite cloud imagery and diagnostic analysis both show that the convection represents separate cloud cluster or mesoscale systems in the disturbance. Whether these disturbances can become the typhoon depends on the strength of the convection heating in the mesoscale systems and close degree of the cloud area. This paper deals with the development and mobile of wave driven by conditional instability of second kind (CISK) mechanism through discussing frequency equation and using numerical method. The results show that the mesoscale CISK wave can occur in the tropics weak cyclone. Vertical shear of basic vortex circulation can significantly strengthen unstable effect of this wave to make fluctuation quickly develop. Vertical shear of basic vortex circulation can also make the wave move toward the center of basic vortex circulation and its group velocity points to the center too. The numerical calculation and the examples show that the disturbance will develop rapidly and move towards the center too.
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Keywords:
- typhoon /
- conditional instability of second kind /
- unstable wave /
- tropical vortex
[1] Ernest M A 1972 Mon. Wea. Rev. 100 733
[2] Chia C W, Gudrun M 2005 J. Atmos. Sci. 62 1497
[3] Chanh Q K, Zhang D L 2008 J. Atmos. Sci. 65 3419
[4] Chanh Q K, Zhang D L 2009 J. Atmos. Sci. 66 1980
[5] Ran L K, Yang W X, Chu Y L 2010 Chin. Phys. B 19 079201
[6] Zhou Y S, Cao J, Gao S T 2008 Acta Phys. Sin. 57 6654 (in Chinese) [周玉淑,曹洁,高守亭 2008 57 6654]
[7] Zhang L, Huang S X, Zhong J, Du H D 2010 Acta Phys. Sin. 59 7478 (in Chinese) [张亮,黄思训,钟剑,杜华栋 2010 59 7478]
[8] Huang H, Zhang M 2008 Acta Meteor. Sin. 66 0577 (in Chinese) [黄泓, 张铭 2008 气象学报 66 0577]
[9] Zhou Y S, Ran L K 2006 Acta Phys. Sin. 59 1366 (in Chinese) [周玉淑, 冉令坤 2010 59 1366]
[10] Huang S X, Cai Q F, Xiang J, Zhang M 2007 Acta Phys. Sin. 56 3022 (in Chinese) [黄思训,蔡其发,项杰, 张铭 2007 56 3022]
[11] Li C Y 1983 Acta Meteor. Sin. 41 275 (in Chinese) [李崇银 1983 气象学报 41 275]
[12] Li C Y, Niu X X 1988 Acta Meteor. Sin. 46 497 (in Chinese) [李崇银, 钮学新 1988 气象学报 46 497]
[13] Li C Y, Ye D Z, Huang R H, Wang L M, Liu S K, Sun S Q, Zeng Q C, Lu P S, Yang D S, Yuan Z G 1985 Dynamic Meteorology Introduction (Beijing: Meteorological Publishing House) p225 (in Chinese) [李崇银, 叶笃正, 黄荣辉, 王两铭, 刘式适,孙淑清,曾庆存,卢佩生,杨大升,袁重光 1985 动力气象学概论 (北京:气象出版社) 第225页]
[14] Tao J J, Yu Y X, Li C K 2008 Acta Meteor. Sin. 66 520 (in Chinese) [陶建军, 余越昕, 李朝奎 2008 气象学报 66 520]
[15] Lu H C, Kang J W, Kou Z, Cheng Y H, Zhong W 2004 Natural Sci. Prog. 14 541 (in chinese) [陆汉城,康建伟,寇正,程艳红,钟玮 2004 自然科学进展 14 541]
[16] Tao J J, Li C K 2009 Acta Phys. Sin. 58 4314 (in Chinese) [陶建军,李朝奎 2009 58 4314]
[17] Wei D W, Gray W M 1988 Chinese Journal of Atmospheric Sciences 12 200 (in Chinese) [魏鼎文, Gray W M 1988 大气科学 12 200]
[18] Bao C L 1980 Tropical Weather (Beijing: Science Press) pp108-120 (in Chinese) [包澄澜 1980 热带天气学 (北京:科学出版社) 第108-120页]
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[1] Ernest M A 1972 Mon. Wea. Rev. 100 733
[2] Chia C W, Gudrun M 2005 J. Atmos. Sci. 62 1497
[3] Chanh Q K, Zhang D L 2008 J. Atmos. Sci. 65 3419
[4] Chanh Q K, Zhang D L 2009 J. Atmos. Sci. 66 1980
[5] Ran L K, Yang W X, Chu Y L 2010 Chin. Phys. B 19 079201
[6] Zhou Y S, Cao J, Gao S T 2008 Acta Phys. Sin. 57 6654 (in Chinese) [周玉淑,曹洁,高守亭 2008 57 6654]
[7] Zhang L, Huang S X, Zhong J, Du H D 2010 Acta Phys. Sin. 59 7478 (in Chinese) [张亮,黄思训,钟剑,杜华栋 2010 59 7478]
[8] Huang H, Zhang M 2008 Acta Meteor. Sin. 66 0577 (in Chinese) [黄泓, 张铭 2008 气象学报 66 0577]
[9] Zhou Y S, Ran L K 2006 Acta Phys. Sin. 59 1366 (in Chinese) [周玉淑, 冉令坤 2010 59 1366]
[10] Huang S X, Cai Q F, Xiang J, Zhang M 2007 Acta Phys. Sin. 56 3022 (in Chinese) [黄思训,蔡其发,项杰, 张铭 2007 56 3022]
[11] Li C Y 1983 Acta Meteor. Sin. 41 275 (in Chinese) [李崇银 1983 气象学报 41 275]
[12] Li C Y, Niu X X 1988 Acta Meteor. Sin. 46 497 (in Chinese) [李崇银, 钮学新 1988 气象学报 46 497]
[13] Li C Y, Ye D Z, Huang R H, Wang L M, Liu S K, Sun S Q, Zeng Q C, Lu P S, Yang D S, Yuan Z G 1985 Dynamic Meteorology Introduction (Beijing: Meteorological Publishing House) p225 (in Chinese) [李崇银, 叶笃正, 黄荣辉, 王两铭, 刘式适,孙淑清,曾庆存,卢佩生,杨大升,袁重光 1985 动力气象学概论 (北京:气象出版社) 第225页]
[14] Tao J J, Yu Y X, Li C K 2008 Acta Meteor. Sin. 66 520 (in Chinese) [陶建军, 余越昕, 李朝奎 2008 气象学报 66 520]
[15] Lu H C, Kang J W, Kou Z, Cheng Y H, Zhong W 2004 Natural Sci. Prog. 14 541 (in chinese) [陆汉城,康建伟,寇正,程艳红,钟玮 2004 自然科学进展 14 541]
[16] Tao J J, Li C K 2009 Acta Phys. Sin. 58 4314 (in Chinese) [陶建军,李朝奎 2009 58 4314]
[17] Wei D W, Gray W M 1988 Chinese Journal of Atmospheric Sciences 12 200 (in Chinese) [魏鼎文, Gray W M 1988 大气科学 12 200]
[18] Bao C L 1980 Tropical Weather (Beijing: Science Press) pp108-120 (in Chinese) [包澄澜 1980 热带天气学 (北京:科学出版社) 第108-120页]
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