| TBB资料揭示的热带大气低频振荡周期的年变化特征 |
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| 引用本文： | 陈旭红,智协飞,田华.TBB资料揭示的热带大气低频振荡周期的年变化特征[J].热带气象学报,1996,12(4):324-332. |
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| 作者姓名： | 陈旭红 智协飞 田华 |
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| 作者单位： | 南京气象学院 |
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| 基金项目： | 中国气象局中日季风合作基金 |
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| 摘 要： | １９８０－１９９２年ＧＭＳＴＢＢ格点资料，分析了１３年平均的ＴＢＢ功率谱随时间的变化，讨论了低频振荡周期的年变化特征及其可能的成因。结果表明，热带大气低频振荡周期有很明显的年变化。北半球热速睦区比赤道附近和南半球热带地区的周期变化幅度更大。总体上，冬季比夏，秋季低频振荡周期更长。
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| 关 键 词： | TBB 低频振荡周期 年变化 大气 |
| 收稿时间： | 1995/3/20 0:00:00 |
| 修稿时间： | 1996/1/29 0:00:00 |
SEASONAL VARIATIONS OF THE TROPICAL LOW FREQUENCY OSCILLATION PERIOD AS INFERRED FROM TBB |
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| Chen Xuhong,Zhi Xiefei and Tian Hua.SEASONAL VARIATIONS OF THE TROPICAL LOW FREQUENCY OSCILLATION PERIOD AS INFERRED FROM TBB[J].Journal of Tropical Meteorology,1996,12(4):324-332. |
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| Authors: | Chen Xuhong Zhi Xiefei and Tian Hua |
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| Institution: | Nanjing Institute of Meteorology, Nanjing, 210044;Nanjing Institute of Meteorology, Nanjing, 210044;Nanjing Institute of Meteorology, Nanjing, 210044 |
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| Abstract: | Based on 1980-1992 GMS TBB data,we analyze the 13 years averaged TBB power spectra in tropical regions as a function of time,and discuss the seasonal variations characteristics of low frequency oscillation period and its possibe mechanism.Results show that tropical low frequency oscillation periods have evident seasonal variations.The seasonal variations in northern hemisphere tropical regions are larger than those in adjacent equatorial regions and southern hemisphere tropical regions.In general,the low frequency oscillations periods in winter are longer than those in summer and fall.The seasonal variations characteristics of low frequency oscillation period can be explained by the mobile wave-CISK mechanism.When the heating strengthens,the phase speed of CISK wave gets larger and the low frequency oscillation period becomes shorter,v.v.. |
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| Keywords: | TBB Low frequency oscillation period Seasonal variation |
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