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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >KELVIN WAVES IN THE EQUATORIAL LOWER STRATOSPHERE AS REVEALED BY CRYOGENIC LIMB ARRAY ETALON SPECTROMETER TEMPERATURE DATA
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KELVIN WAVES IN THE EQUATORIAL LOWER STRATOSPHERE AS REVEALED BY CRYOGENIC LIMB ARRAY ETALON SPECTROMETER TEMPERATURE DATA

机译：开尔文（Kelvin）在低温下层平流层中波动，这是由低温边柱阵列标准差谱仪温度数据揭示的

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Space-time variations of atmospheric temperature in the equatorial lower stratosphere are investigated using temperature data derived from the cryogenic limb array etalon spectrometer (CLAES) instrument onboard the Upper Atmosphere Research Satellite (UARS) for January 1992 to May 1993. During this period, clear evidence is observed for eastward progression of zonal wavenumber 1 temperature anomalies. This variation has a period of about 2 weeks and a maximum amplitude at the equator. The vertical scale of this variation is about 10 km and has an eastward phase tilt with increasing height. Consequently, the phase structure propagates downward with time. From these observed features it is concluded that the temperature variation seen in the equatorial lower stratosphere is due to so-called ''slow'' Kelvin waves. This observational study using satellite measurements clearly shows much more detail on the global structure of ''slow'' Kelvin waves than previous studies. Space-time spectral analysis of temperature variations for the entire CLAES observation period were also performed. During the period January 1992 to May 1993 the background zonal winds (derived from radiosonde observations at Singapore) change from easterlies to westerlies in agreement with the quasi-biennial oscillation (QBO) in the equatorial lower stratosphere. The slow Kelvin wave activity (measured by the power spectral density averaged over a period of about 2 weeks) is vigorous during the easterly regime but rapidly decreases in the westerly regime of the QBO. This clearly indicates the different transmission characteristics of Kelvin waves in the two QBO wind regimes. [References: 26]
机译：利用从上层大气研究卫星（UARS）上1992年1月至1993年5月的低温肢体阵列标准具光谱仪（CLAES）仪器得出的温度数据，研究了赤道​​低平流层大气温度的时空变化。在此期间，观察到1号纬向温度异常向东发展的证据。这种变化的周期大约为2周，在赤道处的振幅最大。这种变化的垂直尺度约为10 km，并随着高度的增加而向东倾斜。因此，相结构随时间向下传播。从这些观测到的特征可以得出结论，在赤道低平流层中看到的温度变化是由于所谓的“慢”开尔文波引起的。这项使用卫星测量的观测研究清楚地表明，“慢速”开尔文波的整体结构比以前的研究要详细得多。还进行了整个CLAES观测期间温度变化的时空光谱分析。在1992年1月至1993年5月期间，背景纬向风（来自新加坡的无线电探空仪观测结果）从东风转变为西风，这与赤道低平流层的准两年一次振荡（QBO）一致。缓慢的开尔文波活动（通过约2周的平均功率谱密度测量）在东风期间剧烈，但在QBO的西风期间迅速降低。这清楚地表明了两种QBO风向中开尔文波的不同传输特性。 [参考：26]

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