Equatorial Kelvin Waves Observed with GPS Occultation Measurements (CHAMP and SAC-C)
Equatorial Kelvin Waves Observed with GPS Occultation Measurements (CHAMP and SAC-C)
复制标题
通过 GPS 掩星测量观测赤道开尔文波（CHAMP 和 SAC-C）
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Y. Aoyama
中科院分区：
文献类型：
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作者：
H. Tsai;T. Tsuda;G. Hajj;J. Wickert;Y. Aoyama
利用 CHAMP 和 SAC-C GPS 无线电掩星数据，从对流层上层和平流层下层的温度剖面观测到 2001 年 5 月和 2002 年 12 月期间赤道开尔文波的结构和传播。由温度波动引起的开尔文波在时间经度剖面上表现为向东相位传播，在高度经度剖面上表现为高度在10～30公里之间的向东相位倾斜。相位级数跨越的范围表明开尔文波从对流层上部到平流层下部的连续性。结果表明，在对流层顶附近，开尔文波一般使温度波动2 K，纬向波1的波周期为12.5-14天，波2的波周期为9.3-11.0天，垂直波长2001年为7.6-8.5 km，2002年为4.4-5.8 km。
Structure and propagation of equatorial Kelvin waves during May 2001 and December 2002 are observed from the temperature profiles in the upper troposphere and the lower stratosphere using CHAMP and SAC-C GPS radio occultation data. Kelvin waves derived from temperature fluctuations characterize eastward phase propagation in time-longitude section and eastward phase tilts with height in altitude- longitude section between 10 and 30 km. The phase progression spans the range indicating the continuity of Kelvin waves from the upper troposphere to the lower stratosphere. Results show that near the tropopause, Kelvin waves fluctuate temperature by 2 K in general, with wave periods of 12.5-14 days for zonal wave number 1 and 9.3-11.0 days for wave number 2, and vertical wavelengths of 7.6- 8.5 km in 2001 and of 4.4-5.8 km in 2002.