对流凝结加热的垂直分布与低纬大气的30～60天低频振荡

薛洪斌; 钟中; 薛峰

对流凝结加热的垂直分布与低纬大气的30～60天低频振荡

1.
解放军理工大学气象学院, 江苏, 南京, 211101
2.
中国科学院大气物理研究所LASG, 北京, 100029

基金项目: 中国科学院资源与环境领域知识创新工程重要方向项目(KZCX2-203);国家自然科学基金项目(40275021,49805004)资助

计量
- 文章访问数: 977
- HTML全文浏览量: 0
- PDF下载量: 890
- 被引次数: 0
出版历程
- 收稿日期: 2002-03-19
- 修回日期: 2002-07-23

VERTICAL DISTRIBUTION OF CONVECTIONAL HEAT AND 30～60-DAY LOW-FREQUENCY OSCILLATION IN THE TROPICS

1.
Institute of Meteorology, Science and Technology University of PLA, Nanjing 211101, China
2.
LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

摘要

摘要: 运用一个包含Wave-CISK机制的斜压半地转8层模式和本征函数展开方法,研究了三种不同的对流凝结加热廓线对低纬大气的30~60天低频振荡的影响。研究表明,不同的加热廓线分布时30~60天低频振荡具有不同的相速和周期,并且低频振荡特征相速的量级都是o(10m/s),由Wave-CISK机制激发的低频CISK-Kelvin波和CISK-Rossby波都是稳定的。同时,还进一步揭示了不同加热廓线对低纬大气30～60天低频振荡垂直结构的影响。
- Wave-CISK机制 /
- 对流凝结加热 /
- CISK-Kelvin波 /
- CISK-Rossby波 /
- 30~60天低频振荡
Abstract: Based on a baroclinic semi-geostrophic model including Wave-CISK,we discuss the influences of different vertical distribution of heating profiles on 30～60-day low-frequency oscillation(LFO) in the tropics,with a 8-layer dynamic model and eigenfunction method. The results show that the phase velocity and period of the LFO is sensitive to the heating profiles,and the phase velocity is in order of o(10m/s). The low-frequency CISK-Kelvin wave and CISK-Rossby wave,triggered by Wave-CISK mechanism,are stable. The influence of different heating profiles on the phase velocity and the vertical structure of LFO are also revealed.
- Wave-CISK /
- CISK-Kelvin wave /
- CISK-Rossby wave /
- Condensation heating Rate /
- 30～60 day low-frequency oscillation

HTML全文

参考文献(16)

[1]	MADDEN R A,JULIAN P R.Description of global-scale circulation cells in the tropics with a 40～50-day period[J].J AtmosSci,1972,29:1109-1123.
[2]	LINDZEN R S.Wave-CISK in the tropics[J].J Atmos Sci,1974,31:156-179.
[3]	CHANG C P.Viscous internal gravity waves and low frequency oscillations in the tropics[J].J Atmos Sci,1977,34:901-910.
[4]	LAU K M,PENG L.Origin of low frequency(intraseasonal)oscillations in the tropical atmosphere.Part I:The basic theory[J].J Atmos Sci,1987,44:950-972.
[5]	李崇银.南亚夏季风槽脊和热带气旋活动与移动性CISK波[J].中国科学(B),1985,7:668-675.
[6]	刘式适,王继勇.Wave-CISK的一个斜压半地转模式和低频振荡[J].气象学报,1992,50:393-402.
[7]	王继勇,刘式适.Wave-CISK和低纬大气低频振荡[J].大气科学,1996,20:584-591.
[8]	李崇银.对流凝结加热与不稳定波[J].大气科学,1983,7:260-268.
[9]	刘式适,刘式达.特殊函数[M].北京:气象出版社,1988.551-563.
[10]	OOYAMA K.A Dynamical model for the study of tropical cyclone development [J].Geofis Intern,1964,4:187-198.
[11]	NITTA T.Energy budget of wave disturbances over the Marshall Island during the years of 1956 and 1958[J].J Meteor SocJapan,1972,50:71-84.
[12]	李崇银.蒸发-风反馈机制的进一步研究[J].热带气象学报,1996,12:193-199.
[13]	EMANUEL K A.An air-sea interaction model of intra-seasonal oscillation in the tropics [J].J Atmos Sci,1987,44:2224-2240.
[14]	NEELIN J D,HELD I M,COOK K H.Evaporation-wind feedback and low-frequency variability in the tropical atmosphere[J].J Atmos Sci,1987,44:2341-2348.
[15]	李桂龙,刘式适.Wave-CISK、蒸发-风反馈和低频振荡[J].大气科学,1993,17:403-413.
[16]	赵强,刘式适.CISK、蒸发-风反馈和热带大气30～60天振荡[J].气象学报,1996,54:417-427.